ANSI B16.9, B16.28
DIN 2605-1, 2605-2
EN 10253-1
Up to 16” N.B.   all schedules
Carbon steel:
ASTM/ASME SA234 WPB, WPC, WPL6
Alloy steel:
ASTM/ASME SA234 WP5, WP9, WP11, WP12, WP22, WP91