Quote:
Originally posted by PBH
Gas pressure in your house is typically about 3-5 psi.
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Local distribution companies in the US typically regulate at the residential meter to about 11 inches of water column (1 psig=27.7" w.c.), so the pressure inside the house will be less than 1 psig. All the natural gas equipment I've seen in residential settings are designed for 7-11" w.c.
Copper, brass, aluminum parts are used on the pipeline (although I don't think I have ever seen copper). Very few companies that I know of allow copper, brass or aluminum equipment (incl. pipe, tubing and fittins) or equipment with parts of those metals in their facilities. Heat from a fire will melt a copper or aluminum fitting well before a stainless steel or steel fitting will fail.
Pipeline quality gas should be "sweet" gas and have very low sulfur content. Even with the addition of mercaptan, we don't usually worry about sulfur.