Gas Piping第 101 / 120 题
Gas piping passes through a concrete foundation wall below grade. What does the code require at that point?
a.The pipe must be cast solidly into the concrete with no sleeve
b.A union must be installed inside the wall for future service
c.The pipe may be run through the wall only if it is PE
d.The pipe must be protected against corrosion and breakage, typically by a sleeve sealed at one end
解析
Piping that penetrates a foundation or exterior wall below grade must be sleeved and protected from corrosion and from stress caused by settlement, with the annular space sealed to prevent gas or water entry. Casting pipe directly into concrete invites corrosion and shear, joints and unions may not be concealed inside the wall, and PE is not permitted to enter a building.
法律依据: IFGC §404免费刷完整 120 道题库 — 无需注册。
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