Standard and regulation Design and manufacture: ANSI B16.34; API 602; GB/T12224; GB/T12228; GB/122235; GB/122236 Socket welding ends: ANSI B16.11; JIS B2306; JB/T1751 Threaded ends: ANSI B1.20.1:BS21; ISO7/1; JIS B0203 Inspection and testAPI 598; JB/T9092 Structural formB.B; Lift type or B.B; Swing type or B.B MaterialANSI/ASTM Body materialA105; F5; F11; F22; 304; 304L; 316; 316L; LF2
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