STANDARD
Design standards:ANSI B16.34,API608.
Wall thickness standard:ANSI B16.34,EN12516-3.
Thread standard:ANSI B1.20.1;BS21;DIN 2999/259;ISO 228/1; ISO7/1;JIS B0203.
Socket welding standard:ASME B16.11.
Butt welding end standard:ASME B16.25/ISO1127/EN12627.
Flange end standard:ASME B16.5 CLASS 150/300; EN1092-1; HG20592 GB/T9113; PN10-PN40; JIS B2238 10K/20K.
Testing standard:API 598; EN 12266.