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.