NFPA 58 requirements for aboveground lines, polyethylene PE pipe, tubing, and fittings are allowed in aboveground line installations.

NFPA 58 requirements for aboveground lines, polyethylene PE pipe, tubing, and fittings are allowed in aboveground line installations.

• A. True
• B. False
• C. PE piping is allowed only for tubing
• D. PE fittings only

Answer: (B)

NFPA 58 requires that aboveground LP-gas piping be metal, such as steel or copper. Nonmetallic piping like polyethylene is restricted to underground installations in LP-gas systems and is not permitted for aboveground line runs. The reason is that exposed, aboveground piping needs the durability and mechanical strength of metal to withstand physical impact, temperature changes, and wear. Polyethylene can be used for underground portions under the code’s specific conditions, with proper fittings and burial requirements, but it is not allowed for aboveground sections. So the statement that polyethylene pipe, tubing, and fittings are allowed in aboveground line installations is not correct.

NFPA 58 requires that aboveground LP-gas piping be metal, such as steel or copper. Nonmetallic piping like polyethylene is restricted to underground installations in LP-gas systems and is not permitted for aboveground line runs. The reason is that exposed, aboveground piping needs the durability and mechanical strength of metal to withstand physical impact, temperature changes, and wear. Polyethylene can be used for underground portions under the code’s specific conditions, with proper fittings and burial requirements, but it is not allowed for aboveground sections. So the statement that polyethylene pipe, tubing, and fittings are allowed in aboveground line installations is not correct.