... convenient constructionPE pipe light quality, gas density for steel 1/8, easy handling, flexible, simple, welding ... construction speed is quick.5, excellent resistance to stress crackingPE pipe stress cracking gas pipe, superior ... without fracture, avoid gas leak. But contrary to occur, steel, will cause gas leak, or gas explosion ... :37:44 Polyethylene gas pipe fitting HDPE gas pipe fitting PE gas pipe ...