Gas Piping第 97 / 120 题
Which material is permitted for a buried gas service line running from an outdoor meter to a detached garage, but is prohibited for the piping inside the garage?
a.Polyethylene (PE) pipe
b.Schedule 40 black steel pipe
c.Corrugated stainless steel tubing
d.Type L copper tube
解析
PE pipe is permitted only outside underground and must transition to an approved metallic material before it rises above grade or enters a building, and a tracer wire or other locating means must be buried with it. Black steel, CSST and copper (where the gas is not corrosive) are all approved for aboveground interior piping, so none of them are limited to underground use.
法律依据: IFGC §403免费刷完整 120 道题库 — 无需注册。
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