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M-801.1 Scope: This chapter in conjunction with NFPA 54 shall govern the installation, repair and maintenance of fuel-gas piping systems. Coverage of piping systems extends from the point of delivery to the connections with each utilization device and includes the design, materials, components, fabrication, assembly, installation, testing, inspection, operation and maintenance of such piping systems.

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M-801.3 Modifications to existing systems: In modifying or adding to existing piping systems, sizes shall be maintained in accordance with [this chapter] NFPA 54.

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