Material

Carbon SA234 WPB, SA234 WPC,SA42 WPL6, SA42 WPL3, WP1. MSS-S
WPHY,WPHY 46,WPHY 52,WPHY 56,WPHY 60,WPHY 65, WPHY 70
DIN 1629 St37, RST37.2 St52

Standard
ASTM 
ASME/ANSI B16.9 Factory-Made wrought steel pipe fittings
ASME B16.28 Wrought steel butt-welding short radius elbows and returns
ASTM A234 Medium and high temperature used carbon and alloy steel pipe fittings
MSS-SP75 Forging butt-welding fittings

JIS JIS B 2302:1998Screwed type steel pipe fittings
JIS B2311 Universal steel butt-welding pipe fittings
JIS B2312 Steel butt-welding pipe fittings
JIS B2313 Steel plate butt-welding pipe fittings
JIS B 2321:1995Aluminium and aluminium alloy butt-welding pipe fittings
EURO 
DIN 2609 Steel butt-welding pipe fittings; technical delivery conditions
DIN 2615 Steel butt-welding pipes fittings; tees with reduced pressure factor 
DIN 2615-2:Steel butt-welding pipe fittings; tees for use at full service pressure 
DIN 2987-P1Threaded steel pipe fittings crosses, tees, elbows
BS 1640 Specification for steel butt-welding pipe fittings for the petroleum industry
BS 1965 Butt welding pipe fittings for pressure purpose