Applied Scale: 1、Design and manufacture:ANSI B16.34;API602 2、Structure and length:ANSI B16.10;JIS B2002 3、Connected length: (1)150、300 and 600;PoundsANSI B16.5(RF) (2)10K JIS 2212;20K JIS B2214;30 and40K JIS B2215 4、Valve test and check:API 598 5、Structure charactor: 6、Material:AIS/ASTM 7、Main Material: A105;LF2;F5;F11;F22;304;304L;316L;LF2