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    Gas Pipe Sizing Calculator (NFPA 54)

    Can I use CSST for natural gas?

    Yes — CSST (corrugated stainless steel tubing) is permitted by NFPA 54 when installed per the manufacturer's listing and bonded per NEC 250.104(B). CSST uses different capacity tables than black iron, so always use the manufacturer's sizing chart for the specific brand.

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    Use the Gas Pipe Sizing Calculator (NFPA 54) to get an exact answer for your inputs.

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    Related questions

    Estimates and general guidance only. Verify against your local code and AHJ before any installation. Gas, electrical, and refrigerant work is hazardous to untrained users.

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