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product description 1) size: nps 1/2"-80" 2) pressure: class 150 - 600 3) materials: wcb, lcb, lc3, wc6, wc9, c12, c5, cf8, cf3, cf3m, cf8m, cf8c 4) design and manufacture standards: gb/t 12238, api 609, mss sp-67, mss sp-68, bs 5155 5) face to face standards: gb/t 12221, mss sp-67, bs 5155 6) end c...
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