• CHAPTER4
    GAS PIPING INSTALLATIONS

    SECTION401 (IFGC)
    GENERAL

    401.1 Scope.

    This chapter shall govern the design, installation, modification and maintenance of piping systems. The applicability of this code to piping systems extends from the point of delivery to the connections with the appliances and includes the design, materials, components, fabrication, assembly, installation, testing, inspection, operation and maintenance of such piping systems.

    401.1.1 Utility piping systems located within buildings.

    Utility service piping located within buildings shall be installed in accordance with the structural safety and fire protection provisions of the International Building Code.

    401.2 Liquefied petroleum gas storage.

    The storage system for liquefied petroleum gas shall be designed and installed in accordance with the International Fire Code and NFPA 58.

    401.3 Modifications to existing systems.

    In modifying or adding to existing piping systems, sizes shall be maintained in accordance with this chapter.

    401.4 Additional appliances.

    Where an additional appliance is to be served, the existing piping shall be checked to determine if it has adequate capacity for all appliances served. If inadequate, the existing system shall be enlarged as required or separate piping of adequate capacity shall be provided.

    401.5 Identification.

    For other than steel pipe, exposed piping shall be identified by a yellow label marked “Gas” in black letters. The marking shall be spaced at intervals not exceeding 5 feet (1524 mm). The marking shall not be required on pipe located in the same room as the appliance served.

    401.6 Interconnections.

    Where two or more meters are installed on the same premises but supply separate consumers, the piping systems shall not be interconnected on the outlet side of the meters.

    401.7 Piping meter identification.

    Piping from multiple meter installations shall be marked with an approved permanent identification by the installer so that the piping system supplied by each meter is readily identifiable.

    401.8 Minimum sizes.

    Pipe utilized for the installation, extension and alteration of any piping system shall be sized to supply the full number of outlets for the intended purpose and shall be sized in accordance with Section 402.

    401.9 Identification.

    Each length of pipe and tubing and each pipe fitting, utilized in a fuel gas system, shall bear the identification of the manufacturer.

    401.10 Third-party testing and certification.

    Piping, tubing and fittings shall comply with the applicable referenced standards, specifications and performance criteria of this code and shall be identified in accordance with Section 401.9. Piping, tubing and fittings shall either be tested by an approved third-party testing agency or certified by an approved third-party certification agency.

    SECTION402 (IFGS)
    PIPE SIZING

    402.1 General considerations.

    Piping systems shall be of such size and so installed as to provide a supply of gas sufficient to meet the maximum demand and supply gas to each appliance inlet at not less than the minimum supply pressure required by the appliance.

    402.2 Maximum gas demand.

    The volumetric flow rate of gas to be provided shall be the sum of the maximum input of the appliances served.

    The total connected hourly load shall be used as the basis for pipe sizing, assuming that all appliances could be operating at full capacity simultaneously. Where a diversity of load can be established, pipe sizing shall be permitted to be based on such loads.

    The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2,000 feet (610 m) in elevation.

    402.3 Sizing.

    Gas piping shall be sized in accordance with one of the following:

    1. 1.Pipe sizing tables or sizing equations in accordance with Section 402.4.

    2. 2.The sizing tables included in a listed piping system’s manufacturer’s installation instructions.

    3. 3.Other approved engineering methods.

    402.4 Sizing tables and equations.

    Where Tables 402.4(1) through 402.4(37) are used to size piping or tubing, the pipe length shall be determined in accordance with Section 402.4.1, 402.4.2 or 402.4.3.

    Where Equations 4-1 and 4-2 are used to size piping or tubing, the pipe or tubing shall have smooth inside walls and the pipe length shall be determined in accordance with Section 402.4.1, 402.4.2 or 402.4.3.

    1. 1.Low-pressure gas equation [Less than 11/2 pounds per square inch (psi) (10.3 kPa)]:

      https://cdn-codes.iccsafe.org/bundles/document/new_document_images/547/Eq0003.jpg(Equation 4-1)

    2. 2.High-pressure gas equation [11/2 psi (10.3 kPa) and above]:

      https://cdn-codes.iccsafe.org/bundles/document/new_document_images/547/Eq0004.jpg(Equation 4-2)

      where:

      D=Inside diameter of pipe, inches (mm).
      Q=Input rate appliance(s), cubic feet per hour at 60°F (16°C) and 30-inch mercury column.
      P1=Upstream pressure, psia (P1 + 14.7).
      P2=Downstream pressure, psia (P2 + 14.7).
      L=Equivalent length of pipe, feet.
      ΔH=Pressure drop, inch water column (27.7 inch water column = 1 psi).

    TABLE 402.4

    Cr AND Y VALUES FOR NATURAL GAS AND UNDILUTED PROPANE AT STANDARD CONDITIONS

    GasEQUATION FACTORS
    CrY
    Natural gas0.60940.9992
    Undiluted propane1.24620.9910

    For SI: 1 cubic foot = 0.028 m3, 1 foot = 305 mm, 1-inch water column = 0.2488 kPa, 1 pound per square inch = 6.895 kPa, 1 British thermal unit per hour = 0.293 W.

    TABLE 402.4(1)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.3 in. w.c.
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/2345681012
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.0265.0476.0657.98110.02011.938
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    101312735141,0601,5803,0504,8608,58017,50031,70051,300105,000191,000303,000
    20901883537261,0902,0903,3405,90012,00021,80035,30072,400132,000208,000
    30721512845838731,6802,6804,7409,66017,50028,30058,200106,000167,000
    40621292434997471,4402,2904,0508,27015,00024,20049,80090,400143,000
    50551142154426621,2802,0303,5907,33013,30021,50044,10080,100127,000
    60501041954006001,1601,8403,2606,64012,00019,50040,00072,600115,000
    7046951793685521,0601,6903,0006,11011,10017,90036,80066,800106,000
    8042891673435149891,5802,7905,68010,30016,70034,20062,10098,400
    9040831573224829281,4802,6105,3309,65015,60032,10058,30092,300
    10038791483044558771,4002,4705,0409,11014,80030,30055,10087,200
    12533701312694037771,2402,1904,4608,08013,10026,90048,80077,300
    15030631192443667041,1201,9804,0507,32011,90024,30044,20070,000
    17528581092243366481,0301,8203,7206,73010,90022,40040,70064,400
    20026541022093136029601,7003,4606,26010,10020,80037,90059,900
    2502348901852775348511,5003,0705,5508,99018,50033,50053,100
    3002143821682514847711,3602,7805,0308,15016,70030,40048,100
    3501940751542314457091,2502,5604,6307,49015,40028,00044,300
    4001837701432154146601,1702,3804,3106,97014,30026,00041,200
    4501735661352023896191,0902,2304,0406,54013,40024,40038,600
    5001633621271913675851,0302,1103,8206,18012,70023,10036,500
    5501531591211813495569822,0003,6205,87012,10021,90034,700
    6001430561151733335309371,9103,4605,60011,50020,90033,100
    6501429541101653185088971,8303,3105,36011,00020,00031,700
    7001327521061593064888621,7603,1805,15010,60019,20030,400
    7501326501021532954708301,6903,0604,96010,20018,50029,300
    800122648991482854548021,6402,9604,7909,84017,90028,300
    850122546951432754397761,5802,8604,6409,53017,30027,400
    900112445931392674267521,5302,7804,5009,24016,80026,600
    950112344901352594137311,4902,7004,3708,97016,30025,800
    1,000112343871312524027111,4502,6204,2508,72015,80025,100
    1,100102140831242403826751,3802,4904,0308,29015,10023,800
    1,200NA2039791192293646441,3102,3803,8507,91014,40022,700
    1,300NA2037761142193496171,2602,2803,6807,57013,70021,800
    1,400NA1935731092103355921,2102,1903,5407,27013,20020,900
    1,500NA1834701052033235711,1602,1103,4107,01012,70020,100
    1,600NA1833681021963125511,1202,0303,2906,77012,30019,500
    1,700NA173266981893025331,0901,9703,1906,55011,90018,800
    1,800NA163164951842935171,0501,9103,0906,35011,50018,300
    1,900NA163062931782845021,0201,8503,0006,17011,20017,700
    2,000NA162960901732764881,0001,8002,9206,00010,90017,200

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.NA means a flow of less than 10 cfh.

    2. 2.All table entries have been rounded to three significant digits.

    TABLE 402.4(2)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.5 in. w.c.
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/2345681012
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.0265.0476.0657.98110.02011.938
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    101723606781,3902,0904,0206,40011,30023,10041,80067,600139,000252,000399,000
    201182474669571,4302,7604,4007,78015,90028,70046,50095,500173,000275,000
    30951993747681,1502,2203,5306,25012,70023,00037,30076,700139,000220,000
    40811703206579851,9003,0205,35010,90019,70031,90065,600119,000189,000
    50721512845838731,6802,6804,7409,66017,50028,30058,200106,000167,000
    60651372575287911,5202,4304,2908,76015,80025,60052,70095,700152,000
    70601262374867281,4002,2303,9508,05014,60023,60048,50088,100139,000
    80561172204526771,3002,0803,6707,49013,60022,00045,10081,900130,000
    90521102074246351,2201,9503,4507,03012,70020,60042,30076,900122,000
    100501041954006001,1601,8403,2606,64012,00019,50040,00072,600115,000
    12544921733555321,0201,6302,8905,89010,60017,20035,40064,300102,000
    15040831573224829281,4802,6105,3309,65015,60032,10058,30092,300
    17537771442964438541,3602,4104,9108,88014,40029,50053,60084,900
    20034711342754127941,2702,2404,5608,26013,40027,50049,90079,000
    25030631192443667041,1201,9804,0507,32011,90024,30044,20070,000
    30027571082213316381,0201,8003,6706,63010,70022,10040,10063,400
    3502553992033055879351,6503,3706,1009,88020,30036,90058,400
    4002349921892835468701,5403,1405,6809,19018,90034,30054,300
    4502246861772665128161,4402,9405,3308,62017,70032,20050,900
    5002143821682514847711,3602,7805,0308,15016,70030,40048,100
    5502041781592394597321,2902,6404,7807,74015,90028,90045,700
    6001939741522284386991,2402,5204,5607,38015,20027,50043,600
    6501838711452184206691,1802,4104,3607,07014,50026,40041,800
    7001736681402094036431,1402,3204,1906,79014,00025,30040,100
    7501735661352023896191,0902,2304,0406,54013,40024,40038,600
    8001634631301953755981,0602,1603,9006,32013,00023,60037,300
    8501633611261893635791,0202,0903,7806,11012,60022,80036,100
    9001532591221833525619922,0203,6605,93012,20022,10035,000
    9501531581181783425459631,9603,5505,76011,80021,50034,000
    1,0001430561151733335309371,9103,4605,60011,50020,90033,100
    1,1001428531091643165038901,8103,2805,32010,90019,80031,400
    1,2001327511041563014808491,7303,1305,07010,40018,90030,000
    1,3001226491001502894608131,6603,0004,8609,98018,10028,700
    1,400122547961442774427811,5902,8804,6709,59017,40027,600
    1,500112445931392674267521,5302,7804,5009,24016,80026,600
    1,600112344891342584117271,4802,6804,3408,92016,20025,600
    1,700112242861302503987031,4302,5904,2008,63015,70024,800
    1,800102241841262423866821,3902,5204,0708,37015,20024,100
    1,900102140811222353756621,3502,4403,9608,13014,80023,400
    2,000NA2039791192293646441,3102,3803,8507,91014,40022,700

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.NA means a flow of less than 10 cfh.

    2. 2.All table entries have been rounded to three significant digits.

    TABLE 402.4(3)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop3.0 in. w.c.
    Specific Gravity0.60
    INTENDED USE: Initial supply pressure of 8.0 inches w.c. or greater
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/234
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.026
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    104549491,7903,6705,50010,60016,90029,80060,800
    203126521,2302,5203,7807,28011,60020,50041,800
    302505249862,0303,0305,8409,31016,50033,600
    402144488441,7302,6005,0007,97014,10028,700
    501903977481,5402,3004,4307,07012,50025,500
    601723606781,3902,0904,0206,40011,30023,100
    701583316241,2801,9203,7005,89010,40021,200
    801473085801,1901,7903,4405,4809,69019,800
    901382895441,1201,6803,2305,1409,09018,500
    1001312735141,0601,5803,0504,8608,58017,500
    1251162424569361,4002,7004,3007,61015,500
    1501052194138481,2702,4503,9006,89014,100
    175962023807801,1702,2503,5906,34012,900
    200901883537261,0902,0903,3405,90012,000
    250801663136439641,8602,9605,23010,700
    300721512845838731,6802,6804,7409,700
    350661392615368031,5502,4704,3608,900
    400621292434997471,4402,2904,0608,300
    450581212284687011,3502,1503,8007,800
    500551142154426621,2802,0303,5907,300
    550521092044206291,2101,9303,4107,000
    600501041954006001,1601,8403,2606,640
    65047991873845751,1101,7603,1206,360
    70046951793685521,0601,7003,0006,110
    75044921733555321,0201,6302,8905,890
    80042891673435149891,5802,7905,680
    85041861623324979571,5302,7005,500
    90040831573224829281,4802,6205,330
    95039811523124689011,4402,5405,180
    1,00038791483044558771,4002,4705,040
    1,10036751412894328331,3302,3504,780
    1,20034711342754127941,2702,2404,560
    1,30033681282643957611,2102,1404,370
    1,40031651232533797311,1702,0604,200
    1,50030631192443667041,1201,9804,050
    1,60029611152363536801,0801,9203,910
    1,70028591112283426581,0501,8503,780
    1,80027571082213316381,0201,8003,670
    1,90027561052153226199871,7503,560
    2,00026541022093136029601,7003,460

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(4)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop6.0 in. w.c.
    Specific Gravity0.60
    INTENDED USE: Initial supply pressure of 11.0 inches w.c. or greater
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/234
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.026
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    106601,3802,6005,3408,00015,40024,60043,40088,500
    204549491,7903,6705,50010,60016,90029,90060,800
    303647621,4402,9504,4208,50013,60024,00048,900
    403126521,2302,5203,7807,28011,60020,50041,800
    502765781,0902,2403,3506,45010,30018,20037,100
    602505249862,0303,0305,8409,31016,50033,600
    702304829071,8602,7905,3808,57015,10030,900
    802144488441,7302,6005,0007,97014,10028,700
    902014207921,6302,4404,6907,48013,20027,000
    1001903977481,5402,3004,4307,07012,50025,500
    1251683526631,3602,0403,9306,26011,10022,600
    1501533196011,2301,8503,5605,67010,00020,500
    1751402935531,1401,7003,2805,2209,23018,800
    2001312735141,0601,5803,0504,8608,58017,500
    2501162424569361,4002,7004,3007,61015,500
    3001052194138481,2702,4503,9006,89014,100
    350962023807801,1702,2503,5906,34012,900
    400901883537261,0902,0903,3405,90012,000
    450841763326811,0201,9703,1305,54011,300
    500801663136439641,8602,9605,23010,700
    550761582976119151,7602,8104,97010,100
    600721512845838731,6802,6804,7409,660
    650691442725588361,6102,5704,5409,250
    700661392615368031,5502,4704,3608,890
    750641342525167741,4902,3804,2008,560
    800621292434997471,4402,2904,0608,270
    850601252354837231,3902,2203,9208,000
    900581212284687011,3502,1503,8007,760
    950561182214546811,3102,0903,7007,540
    1,000551142154426621,2802,0303,5907,330
    1,100521092044206291,2101,9303,4106,960
    1,200501041954006001,1601,8403,2606,640
    1,30047991873845751,1001,7603,1206,360
    1,40046951793685521,0601,7003,0006,110
    1,50044921733555321,0201,6302,8905,890
    1,60042891673435149891,5802,7905,680
    1,70041861623324979571,5302,7005,500
    1,80040831573224829281,4802,6205,330
    1,90039811523124689011,4402,5405,180
    2,00038791483044558771,4002,4705,040

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(5)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet Pressure2.0 psi
    Pressure Drop1.0 psi
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/234
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.026
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    101,5103,0405,56011,40017,10032,90052,50092,800189,000
    201,0702,1503,9308,07012,10023,30037,10065,600134,000
    308691,7603,2106,5909,88019,00030,30053,600109,000
    407531,5202,7805,7108,55016,50026,30046,40094,700
    506731,3602,4905,1107,65014,70023,50041,50084,700
    606151,2402,2704,6606,98013,50021,40037,90077,300
    705691,1502,1004,3206,47012,50019,90035,10071,600
    805321,0801,9704,0406,05011,70018,60032,80067,000
    905021,0101,8503,8105,70011,00017,50030,90063,100
    1004629341,7103,5105,26010,10016,10028,50058,200
    1254148361,5303,1404,7009,06014,40025,50052,100
    1503727511,3702,8204,2208,13013,00022,90046,700
    1753446951,2702,6013,9107,53012,00021,20043,300
    2003186421,1702,4103,6106,96011,10019,60040,000
    2502795831,0402,1403,2106,1809,85017,40035,500
    3002535289451,9402,9105,6008,92015,80032,200
    3502324868691,7902,6705,1508,21014,50029,600
    4002164528091,6602,4904,7907,64013,50027,500
    4502034247591,5602,3304,5007,17012,70025,800
    5001924017171,4702,2104,2506,77012,00024,400
    5501823816811,4002,0904,0306,43011,40023,200
    6001743636501,3302,0003,8506,13010,80022,100
    6501663486221,2801,9103,6805,87010,40021,200
    7001603345981,2301,8403,5405,6409,97020,300
    7501543225761,1801,7703,4105,4409,61019,600
    8001493115561,1401,7103,2905,2509,28018,900
    8501443015381,1001,6503,1905,0808,98018,300
    9001392925221,0701,6003,0904,9308,71017,800
    9501352835071,0401,5603,0004,7808,46017,200
    1,0001322754931,0101,5202,9204,6508,22016,800
    1,1001252624689601,4402,7704,4207,81015,900
    1,2001192504469171,3702,6404,2207,45015,200
    1,3001142394278781,3202,5304,0407,14014,600
    1,4001102304118431,2602,4303,8806,86014,000
    1,5001062213968121,2202,3403,7406,60013,500
    1,6001022143827841,1802,2603,6106,38013,000
    1,700992073707591,1402,1903,4906,17012,600
    1,800962003587361,1002,1203,3905,98012,200
    1,900931953487151,0702,0603,2905,81011,900
    2,000911893396951,0402,0103,2005,65011,500

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(6)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet Pressure3.0 psi
    Pressure Drop2.0 psi
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/234
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.026
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    102,3504,9209,27019,00028,50054,90087,500155,000316,000
    201,6203,3806,37013,10019,60037,70060,100106,000217,000
    301,3002,7205,11010,50015,70030,30048,30085,400174,000
    401,1102,3204,3808,99013,50025,90041,30073,100149,000
    509852,0603,8807,97011,90023,00036,60064,800132,000
    608921,8703,5207,22010,80020,80033,20058,700120,000
    708211,7203,2306,6409,95019,20030,50054,000110,000
    807641,6003,0106,1809,26017,80028,40050,200102,000
    907171,5002,8205,8008,68016,70026,70047,10096,100
    1006771,4202,6705,4708,20015,80025,20044,50090,800
    1256001,2502,3604,8507,27014,00022,30039,50080,500
    1505441,1402,1404,4006,59012,70020,20035,70072,900
    1755001,0501,9704,0406,06011,70018,60032,90067,100
    2004659731,8303,7605,64010,90017,30030,60062,400
    2504128621,6203,3305,0009,62015,30027,10055,300
    3003747811,4703,0204,5308,72013,90024,60050,100
    3503447191,3502,7804,1708,02012,80022,60046,100
    4003206691,2602,5903,8707,46011,90021,00042,900
    4503006271,1802,4303,6407,00011,20019,70040,200
    5002835931,1202,2903,4306,61010,50018,60038,000
    5502695631,0602,1803,2606,28010,00017,70036,100
    6002575371,0102,0803,1105,9909,55016,90034,400
    6502465149691,9902,9805,7409,15016,20033,000
    7002364949311,9102,8605,5108,79015,50031,700
    7502284768971,8402,7605,3108,47015,00030,500
    8002204608661,7802,6605,1308,18014,50029,500
    8502134458381,7202,5804,9607,91014,00028,500
    9002064318121,6702,5004,8107,67013,60027,700
    9502004197891,6202,4304,6707,45013,20026,900
    1,0001954077671,5802,3604,5507,24012,80026,100
    1,1001853877291,5002,2404,3206,89012,20024,800
    1,2001773696951,4302,1404,1206,57011,60023,700
    1,3001693536661,3702,0503,9406,29011,10022,700
    1,4001623406401,3101,9703,7906,04010,70021,800
    1,5001563276161,2701,9003,6505,82010,30021,000
    1,6001513165951,2201,8303,5305,62010,00020,300
    1,7001463065761,1801,7703,4105,4409,61019,600
    1,8001422965581,1501,7203,3105,2709,32019,000
    1,9001382885421,1101,6703,2105,1209,05018,400
    2,0001342805271,0801,6203,1204,9808,80018,000

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(7)

    SCHEDULE 40 METALLIC PIPE

    GasNatural
    Inlet Pressure5.0 psi
    Pressure Drop3.5 psi
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal1/23/4111/411/2221/234
    Actual ID0.6220.8241.0491.3801.6102.0672.4693.0684.026
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    103,1906,43011,80024,20036,20069,700111,000196,000401,000
    202,2504,5508,32017,10025,60049,30078,600139,000283,000
    301,8403,7206,79014,00020,90040,30064,200113,000231,000
    401,5903,2205,88012,10018,10034,90055,60098,200200,000
    501,4302,8805,26010,80016,20031,20049,70087,900179,000
    601,3002,6304,8009,86014,80028,50045,40080,200164,000
    701,2002,4304,4509,13013,70026,40042,00074,300151,000
    801,1502,3304,2608,54012,80024,70039,30069,500142,000
    901,0602,1503,9208,05012,10023,20037,00065,500134,000
    1009791,9803,6207,43011,10021,40034,20060,400123,000
    1258761,7703,2406,6409,95019,20030,60054,000110,000
    1507861,5902,9105,9608,94017,20027,40048,50098,900
    1757281,4702,6905,5208,27015,90025,40044,90091,600
    2006731,3602,4905,1007,65014,70023,50041,50084,700
    2505581,1702,2004,5106,76013,00020,80036,70074,900
    3005061,0601,9904,0906,13011,80018,80033,30067,800
    3504659731,8303,7605,64010,90017,30030,60062,400
    4004339051,7103,5005,25010,10016,10028,50058,100
    4504068491,6003,2904,9209,48015,10026,70054,500
    5003848021,5103,1004,6508,95014,30025,20051,500
    5503647621,4402,9504,4208,50013,60024,00048,900
    6003487271,3702,8104,2108,11012,90022,90046,600
    6503336961,3102,6904,0307,77012,40021,90044,600
    7003206691,2602,5903,8807,46011,90021,00042,900
    7503086441,2102,4903,7307,19011,50020,30041,300
    8002986221,1702,4103,6106,94011,10019,60039,900
    8502886021,1302,3303,4906,72010,70018,90038,600
    9002795841,1002,2603,3806,52010,40018,40037,400
    9502715671,0702,1903,2906,33010,10017,80036,400
    1,0002645511,0402,1303,2006,1509,81017,30035,400
    1,1002505249872,0303,0305,8409,32016,50033,600
    1,2002395009411,9302,9005,5808,89015,70032,000
    1,3002294789011,8502,7705,3408,51015,00030,700
    1,4002204608661,7802,6605,1308,18014,50029,500
    1,5002124438341,7102,5704,9407,88013,90028,400
    1,6002054288061,6502,4804,7707,61013,40027,400
    1,7001984147801,6002,4004,6207,36013,00026,500
    1,8001924017561,5502,3304,4807,14012,60025,700
    1,9001863907341,5102,2604,3506,93012,30025,000
    2,0001813797141,4702,2004,2306,74011,90024,300

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(8)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.3 in. w.c.
    Specific Gravity0.60
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    102042851482104488061,2702,650
    201429581021443085548731,820
    30112347821162474457011,460
    4010204070992113816001,250
    50NA173562881873375321,110
    60NA163256791703064821,000
    70NA14295273156281443924
    80NA13274868145262413859
    90NA13264564136245387806
    100NA12244360129232366761
    125NA11223853114206324675
    150NA10203448103186294612
    175NANA18314595171270563
    200NANA17294189159251523
    250NANA15263778141223464
    300NANA13233371128202420
    350NANA12223165118186387
    400NANA11202861110173360
    450NANA11192757103162338
    500NANA1018255497153319
    550NANANA17245192145303
    600NANANA16234988139289
    650NANANA15224784133277
    700NANANA15214581128266
    750NANANA14204378123256
    800NANANA14204275119247
    850NANANA13194073115239
    900NANANA13183971111232
    950NANANA13183869108225
    1,000NANANA12173767105219
    1,100NANANA12163563100208
    1,200NANANA1116346095199
    1,300NANANA1115325891190
    1,400NANANA1014315688183
    1,500NANANANA14305484176
    1,600NANANANA13295282170
    1,700NANANANA13285079164
    1,800NANANANA13274977159
    1,900NANANANA12264774155
    2,000NANANANA12254672151

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.NA means a flow of less than 10 cfh.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(9)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.5 in. w.c.
    Specific Gravity0.60
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    1027551111952765901,0601,6803,490
    201838771341904067301,1502,400
    301530611071523265869251,930
    40132653921312795027911,650
    50112347821162474457011,460
    60102142741052244036351,320
    70NA193968962063715851,220
    80NA183663901923455441,130
    90NA173459841803245101,060
    100NA163256791703064821,000
    125NA14285070151271427890
    150NA13264564136245387806
    175NA12244159125226356742
    200NA11223955117210331690
    250NANA203448103186294612
    300NANA18314494169266554
    350NANA16284086155245510
    400NANA15263880144228474
    450NANA14253575135214445
    500NANA13233371128202420
    550NANA13223268122192399
    600NANA12213064116183381
    650NANA12202962111175365
    700NANA11202859107168350
    750NANA11192757103162338
    800NANA1018265599156326
    850NANA1018255396151315
    900NANANA17245293147306
    950NANANA17245090143297
    1,000NANANA16234988139289
    1,100NANANA15224684132274
    1,200NANANA15214480126262
    1,300NANANA14204276120251
    1,400NANANA13194173116241
    1,500NANANA13183971111232
    1,600NANANA13183868108224
    1,700NANANA12173766104217
    1,800NANANA12173664101210
    1,900NANANA1116356298204
    2,000NANANA1116346095199

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.NA means a flow of less than 10 cfh.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(10)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop1.0 in. w.c.
    Specific Gravity0.60
    INTENDED USE: SIZING BETWEEN HOUSE LINE REGULATOR AND THE APPLIANCE
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    1039801622834028591,5502,4405,080
    2027551111952765901,0601,6803,490
    302144891562224748531,3502,800
    401838771341904067301,1502,400
    501633681191683596471,0202,130
    601530611071523265869251,930
    70132857991403005398511,770
    80132653921312795027911,650
    90122449861222624717421,550
    100112347821162474457011,460
    125NA2041721032193946221,290
    150NA183765931983575631,170
    175NA173460851833295181,080
    200NA163256791703064821,000
    250NA14285070151271427890
    300NA13264564136245387806
    350NA12244159125226356742
    400NA11223955117210331690
    450NA10213651110197311647
    500NANA203448103186294612
    550NANA19324698177279581
    600NANA18314494169266554
    650NANA17304290162255531
    700NANA16284086155245510
    750NANA16273983150236491
    800NANA15263880144228474
    850NANA15263678140220459
    900NANA14253575135214445
    950NANA14243473132207432
    1,000NANA13233371128202420
    1,100NANA13223268122192399
    1,200NANA12213064116183381
    1,300NANA12202962111175365
    1,400NANA11202859107168350
    1,500NANA11192757103162338
    1,600NANA1018265599156326
    1,700NANA1018255396151315
    1,800NANANA17245293147306
    1,900NANANA17245090143297
    2,000NANANA16234988139289

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.NA means a flow of less than 10 cfh.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(11)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop17.0 in. w.c.
    Specific Gravity0.60
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    101903917961,3901,9704,2207,59012,00024,900
    201302695479561,3602,9005,2208,23017,100
    301052164397681,0902,3304,1906,61013,800
    40901853766579321,9903,5905,65011,800
    50791643335828261,7703,1805,01010,400
    60721483025287491,6002,8804,5409,460
    70661372784866891,4702,6504,1808,700
    80621272584526411,3702,4603,8908,090
    90581192434246011,2802,3103,6507,590
    100551132294005681,2102,1803,4407,170
    125481002033555031,0801,9403,0506,360
    15044901843214569741,7502,7705,760
    17540831692964208961,6102,5405,300
    20038771572753908341,5002,3704,930
    25033691402443467391,3302,1004,370
    30030621262213136701,2101,9003,960
    35028571162032886161,1101,7503,640
    40026531081892685731,0301,6303,390
    45024501021772525389681,5303,180
    5002347961682385089141,4403,000
    5502245911592264828681,3702,850
    6002143871522154608291,3102,720
    6502041831452064417931,2502,610
    7001939801401984237621,2002,500
    7501838771351914087341,1602,410
    8001837741301843947091,1202,330
    8501735721261783816861,0802,250
    9001734701221733706651,0502,180
    9501633681181683596461,0202,120
    1,0001632661151633496289912,060
    1,1001531631091553325979411,960
    1,2001429601041483165698981,870
    1,3001428571001423035458601,790
    1,400132755961362915248261,720
    1,500132653931312805057961,660
    1,600122551891272714877681,600
    1,700122449861232624727441,550
    1,800112448841192544577211,500
    1,900112347811152474447001,460
    2,000112245791122404326811,420

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.All table entries have been rounded to three significant digits.

    TABLE 402.4(12)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet Pressure2.0 psi
    Pressure Drop1.0 psi
    Specific Gravity0.60
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    102455061,0301,8002,5505,4509,82015,50032,200
    201693487081,2401,7603,7506,75010,60022,200
    301352795689931,4103,0105,4208,55017,800
    401162394868501,2102,5804,6407,31015,200
    501032124317541,0702,2804,1106,48013,500
    60931923916839692,0703,7305,87012,200
    70861773596288911,9003,4305,40011,300
    80801643345848291,7703,1905,03010,500
    90751543145487781,6602,9904,7209,820
    100711462965187351,5702,8304,4509,280
    125631292634596511,3902,5003,9508,220
    150571172384165901,2602,2703,5807,450
    175521082193835431,1602,0903,2906,850
    200491002043565051,0801,9403,0606,380
    25043891813154489561,7202,7105,650
    30039801642864068661,5602,4605,120
    35036741502633737971,4302,2604,710
    40033691402453477411,3302,1004,380
    45031651312303266961,2501,9704,110
    50030611242173086571,1801,8703,880
    55028581182062926241,1201,7703,690
    60027551121962795951,0701,6903,520
    65026531081882675701,0301,6203,370
    70025511031812565489861,5503,240
    75024491001742475289501,5003,120
    8002347961682395109171,4503,010
    8502246931632314938881,4002,920
    9002244901582244788611,3602,830
    9502143881532174648361,3202,740
    1,0002042851492114528131,2802,670
    1,1001940811422014297721,2202,540
    1,2001838771351924097371,1602,420
    1,3001836741291833927051,1102,320
    1,4001735711241763766781,0702,230
    1,5001634681201703636531,0302,140
    1,6001633661161643506309942,070
    1,7001531641121593396109622,000
    1,8001530621081543295929331,940
    1,9001430601051493195759061,890
    2,0001429591021453105598811,830

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.All table entries have been rounded to three significant digits.

    TABLE 402.4(13)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet Pressure2.0 psi
    Pressure Drop1.5 psi
    Specific Gravity0.60
    INTENDED USEPipe sizing between point of delivery and the house line regulator. Total load supplied by a single house line regulator not exceeding 150 cubic feet per hour.
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    103036251,2702,2203,1506,74012,10019,10039,800
    202084308741,5302,1704,6308,33013,10027,400
    301673457021,2301,7403,7206,69010,60022,000
    401432956011,0501,4903,1805,7309,03018,800
    501272625329311,3202,8205,0808,00016,700
    601152374828431,2002,5604,6007,25015,100
    701062184447761,1002,3504,2306,67013,900
    80982034137221,0202,1903,9406,21012,900
    90921903876779612,0503,6905,82012,100
    100871803666409071,9403,4905,50011,500
    125771593245678041,7203,0904,88010,200
    150701442945147291,5602,8004,4209,200
    175641332704726701,4302,5804,0608,460
    200601242524406241,3302,4003,7807,870
    250531102233905531,1802,1303,3506,980
    30048992023535011,0701,9303,0406,320
    35044911863254619841,7702,7905,820
    40041851733024299161,6502,6005,410
    45039801622834028591,5502,4405,080
    50036751532683808111,4602,3004,800
    55035721462543617711,3902,1904,560
    60033681392433447351,3202,0904,350
    65032651332323307041,2702,0004,160
    70030631282233176761,2201,9204,000
    75029601232153056521,1701,8503,850
    80028581192082956291,1301,7903,720
    85027571152012856091,1001,7303,600
    90027551111952765901,0601,6803,490
    95026531081892685731,0301,6303,390
    1,00025521051842615581,0001,5803,300
    1,10024491001752485309541,5003,130
    1,2002347951672375059101,4302,990
    1,3002245911602274848711,3702,860
    1,4002143881532184658371,3202,750
    1,5002042851482104488061,2702,650
    1,6001940821432024327791,2302,560
    1,7001939791381964197531,1902,470
    1,8001838771341904067311,1502,400
    1,9001837741301843947091,1202,330
    2,0001736721261793836901,0902,270

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.Where this table is used to size the tubing upstream of a line pressure regulator, the pipe or tubing downstream of the line pressure regulator shall be sized using a pressure drop not greater than 1 inch w.c.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(14)

    SEMIRIGID COPPER TUBING

    GasNatural
    Inlet Pressure5.0 psi
    Pressure Drop3.5 psi
    Specific Gravity0.60
    TUBE SIZE (inch)
    NominalK & L1/43/81/25/83/4111/411/22
    ACR3/81/25/83/47/811/813/8
    Outside0.3750.5000.6250.7500.8751.1251.3751.6252.125
    Inside0.3050.4020.5270.6520.7450.9951.2451.4811.959
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    105111,0502,1403,7505,32011,40020,40032,20067,100
    203517241,4702,5803,6507,80014,00022,20046,100
    302825821,1802,0702,9306,27011,30017,80037,000
    402414981,0101,7702,5105,3609,66015,20031,700
    502144418981,5702,2304,7508,56013,50028,100
    601944008131,4202,0204,3107,75012,20025,500
    701783687481,3101,8603,9607,13011,20023,400
    801663426961,2201,7303,6906,64010,50021,800
    901563216531,1401,6203,4606,2309,82020,400
    1001473036171,0801,5303,2705,8809,27019,300
    1251302695479551,3602,9005,2108,22017,100
    1501182434958661,2302,6204,7207,45015,500
    1751092244567961,1302,4104,3506,85014,300
    2001012084247411,0502,2504,0406,37013,300
    250901853766579321,9903,5805,65011,800
    300811673405958441,8003,2505,12010,700
    350751543135477771,6602,9904,7109,810
    400691432915097221,5402,7804,3809,120
    450651342734786781,4502,6104,1108,560
    500621272584516401,3702,4603,8808,090
    550581212454296081,3002,3403,6907,680
    600561152344095801,2402,2303,5207,330
    650531102243925561,1902,1403,3707,020
    700511062153765341,1402,0503,2406,740
    750491022073625141,1001,9803,1206,490
    80048982003504971,0601,9103,0106,270
    85046951943394811,0301,8502,9106,070
    90045921883284661,0001,7902,8205,880
    95043901823194529671,7402,7405,710
    1,00042871773104409401,6902,6705,560
    1,10040831692954188931,6102,5305,280
    1,20038791612813998521,5302,4205,040
    1,30037761542693828161,4702,3204,820
    1,40035731482593677841,4102,2204,630
    1,50034701432493537551,3602,1404,460
    1,60033681382413417291,3102,0704,310
    1,70032651332333307051,2702,0004,170
    1,80031631292263206841,2301,9404,040
    1,90030621252193116641,2001,8903,930
    2,00029601222133026461,1601,8303,820

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.

    2. 2.All table entries have been rounded to three significant digits.

    TABLE 402.4(15)

    CORRUGATED STAINLESS STEEL TUBING (CSST)

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.5 in. w.c.
    Specific Gravity0.60
    TUBE SIZE (EHD)
    Flow Designation1315181923253031373946486062
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    546631151342252704715468951,0371,7902,0703,6604,140
    10324482951611923303836397461,2601,4702,6002,930
    15253566771321572673105246151,0301,2002,1402,400
    20223158671161372312694565368881,0501,8502,080
    25192752601041222062404094827939361,6601,860
    3018254755961121882183744427238561,5201,700
    401521414783971621883253866257421,3201,470
    501319374275871441682923475596651,1801,320
    601217343868801311532673185096081,0801,200
    701116313663741211412482954715631,0001,110
    801015293360691131322322774405279401,040
    90101428325765107125219262415498887983
    10091326305462101118208249393472843933
    150710202342487891171205320387691762
    20069182138447182148179277336600661
    25058161934396374133161247301538591
    3005715173236576795148226275492540

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n, where L is additional length (feet) of tubing and n is the number of additional fittings or bends.

    2. 2.EHD—Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(16)

    CORRUGATED STAINLESS STEEL TUBING (CSST)

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop3.0 in. w.c.
    Specific Gravity0.60
    INTENDED USE: Initial supply pressure of 8.0 inches w.c. or greater
    TUBE SIZE (EHD)
    Flow Designation13151819232530313746486062
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    51201602773275296491,1801,3702,1404,4305,0108,80010,100
    10831121972313804628289581,5303,2003,5606,2707,160
    1567901611893133796737781,2502,5402,9105,1405,850
    2057781401642733295806721,0902,2002,5304,4605,070
    2551691251472452955185999781,9602,2704,0004,540
    3046631151342252704715468951,7902,0703,6604,140
    4039541001161962344074717781,5501,8003,1803,590
    503548891041762103634216981,3801,6102,8503,210
    60324482951611923303836391,2601,4702,6002,930
    70294176881501783063555931,1701,3602,4202,720
    80273871821411672853315551,0901,2802,2602,540
    90263667771331572683115241,0301,2002,1402,400
    100243463731261492542954989741,1402,0302,280
    150192752601041222062404097939361,6601,860
    20017234552911061782073556868121,4401,610
    2501521404682951591843196137281,2901,440
    3001319374275871441682345596651,1801,320

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (feet) of tubing and n is the number of additional fittings or bends.

    2. 2.EHD—Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(17)

    CORRUGATED STAINLESS STEEL TUBING (CSST)

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop6.0 in. w.c.
    Specific Gravity0.60
    INTENDED USE: Initial supply pressure of 11.0 inches w.c. or greater
    TUBE SIZE (EHD)
    Flow Designation13151819232530313746486062
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    51732293894617379111,6901,9503,0006,2807,05012,40014,260
    101201602773275296491,1801,3702,1404,4305,0108,80010,100
    15961302272674365329601,1101,7603,6104,1007,2108,260
    20831121972313804628289581,5303,1203,5606,2707,160
    2574991762073424147398551,3702,7903,1905,6206,400
    3067901611893133796737781,2502,5402,9105,1405,850
    4057781401642733295806721,0902,2002,5304,4605,070
    5051691251472452955185999781,9602,2704,0004,540
    6046631151342252704715468951,7902,0703,6604,140
    7042581061242092504355058301,6601,9203,3903,840
    8039541001161962344074717781,5501,8003,1803,590
    903751941091852213834447351,4601,7003,0003,390
    1003548891041762103634216981,3801,6102,8503,210
    150283973851451722943425731,1301,3202,3402,630
    200243463731261492542954989741,1402,0302,280
    250213057661141342262634478701,0201,8202,040
    300192752601041222062404097939361,6601,860

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (feet) of tubing and n is the number of additional fittings or bends.

    2. 2.EHD—Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

    3. 3.All table entries have been rounded to three significant digits.

    TABLE 402.4(18)

    CORRUGATED STAINLESS STEEL TUBING (CSST)

    GasNatural
    Inlet Pressure2 psi
    Pressure Drop1.0 psi
    Specific Gravity0.60
    TUBE SIZE (EHD)
    Flow Designation1315181923253031373946486062
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    102703535877001,1001,3702,5902,9904,5105,0379,60010,70018,60021,600
    251662203744447098761,6201,8702,8903,2586,0406,78011,90013,700
    301512003424056508011,4801,7002,6402,9875,5106,20010,90012,500
    401291722973515676961,2701,4702,3002,6054,7605,3809,44010,900
    501151542663145106241,1401,3102,0602,3434,2604,8208,4709,720
    75931242182574205129221,0701,6901,9323,4703,9506,9407,940
    80891202112494074968921,0301,6401,8743,3603,8206,7307,690
    100791071892223664457959201,4701,6853,0003,4206,0306,880
    15064871551823023646467481,2101,3892,4402,8004,9405,620
    20055751351572633175576451,0501,2122,1102,4304,2904,870
    25049671211412362844975769411,0901,8902,1803,8504,360
    30044611101292172604535258629991,7201,9903,5203,980
    4003852961111892253904537498711,4901,7303,0603,450
    5003446861001702023484045527831,3301,5502,7403,090

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 3/4 psi, DO NOT USE THIS TABLE. Consult with the regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate.

    2. 2.CAUTION: Capacities shown in the table might exceed maximum capacity for a selected regulator. Consult with the regulator or tubing manufacturer for guidance.

    3. 3.Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (feet) of tubing and n is the number of additional fittings or bends.

    4. 4.EHD—Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

    5. 5.All table entries have been rounded to three significant digits.

    TABLE 402.4(19)

    CORRUGATED STAINLESS STEEL TUBING (CSST)

    GasNatural
    Inlet Pressure5.0 psi
    Pressure Drop3.5 psi
    Specific Gravity0.60
    TUBE SIZE (EHD)
    Flow Designation1315181923253031373946486062
    Length (ft)Capacity in Cubic Feet of Gas Per Hour
    105236741,0801,3002,0002,5304,9205,6608,3009,14018,10019,80034,40040,400
    253224206918271,2901,6203,0803,5405,3105,91111,40012,60022,00025,600
    302923826327551,1801,4802,8003,2304,8605,42010,40011,50020,10023,400
    402513295496541,0301,2802,4202,7904,2304,7278,97010,00017,40020,200
    502232934925869261,1502,1602,4903,7904,2518,0208,93015,60018,100
    751802384034797639441,7502,0203,1103,5066,5307,32012,80014,800
    801742303914637409151,6901,9603,0203,4006,3207,09012,40014,300
    1001542053504156658201,5101,7402,7103,0575,6506,35011,10012,800
    1501241662873395486721,2301,4202,2202,5214,6005,2009,13010,500
    2001071432492944785841,0601,2201,9302,1993,9804,5107,9309,090
    250951282232634305249451,0901,7301,9773,5504,0407,1108,140
    300861162042403944798609951,5901,8133,2403,6906,5007,430
    400741001772083434167428581,3801,5812,8003,2105,6506,440
    50066891591863093736627661,0401,4222,5002,8705,0605,760

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Notes:

    1. 1.Table does not include effect of pressure drop across the line regulator. Where regulator loss exceeds 3/4 psi, DO NOT USE THIS TABLE. Consult with the regulator manufacturer for pressure drops and capacity factors. Pressure drops across a regulator may vary with flow rate.

    2. 2.CAUTION: Capacities shown in the table might exceed maximum capacity for a selected regulator. Consult with the regulator or tubing manufacturer for guidance.

    3. 3.Table includes losses for four 90-degree bends and two end fittings. Tubing runs with larger numbers of bends or fittings shall be increased by an equivalent length of tubing to the following equation: L = 1.3n where L is additional length (feet) of tubing and n is the number of additional fittings or bends.

    4. 4.EHD—Equivalent Hydraulic Diameter, which is a measure of the relative hydraulic efficiency between different tubing sizes. The greater the value of EHD, the greater the gas capacity of the tubing.

    5. 5.All table entries have been rounded to three significant digits.

    TABLE 402.4(20)

    POLYETHYLENE PLASTIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.3 in. w.c.
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal OD1/23/4111/411/2234
    DesignationSDR 9SDR 11SDR 11SDR 10SDR 11SDR 11SDR 11SDR 11
    Actual ID0.6600.8601.0771.3281.5541.9432.8643.682
    Length (ft)Capacity in Cubic Feet of Gas per Hour
    101533055519551,4402,5907,17013,900
    201052103796569911,7804,9209,520
    30841693045277961,4303,9507,640
    40721442604516811,2203,3806,540
    50641282314006041,0803,0005,800
    60581162093625479832,7205,250
    70531071923335039042,5004,830
    8050991793104688412,3304,500
    9046931682914397892,1804,220
    10044881592754157452,0603,990
    12539781412433686611,8303,530
    15035711272213335981,6603,200
    17532651172033065511,5202,940
    20030601091892855121,4202,740
    2502754971672534541,2602,430
    3002448881522294111,1402,200
    3502245811392113781,0502,020
    4002142751301963529741,880
    4501939701221843309141,770
    5001837661151743128631,670

    For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1-inch water column = 0.2488 kPa, 1 British thermal unit per hour = 0.2931 W, 1 cubic foot per hour = 0.0283 m3/h, 1 degree = 0.01745 rad.

    Note: All table entries have been rounded to three significant digits.

    TABLE 402.4(21)

    POLYETHYLENE PLASTIC PIPE

    GasNatural
    Inlet PressureLess than 2 psi
    Pressure Drop0.5 in. w.c.
    Specific Gravity0.60
    PIPE SIZE (inch)
    Nominal OD1/23/41