ASTM A234 WPB carbon steel pipe elbow pipe fittings Size 1/2\"- 48\" Wall thickness Sch 10- Sch160 xxs Applicable standard ANSI B 16.9,ASME , ASTM,,JIS , DIN , EN, GB/T12459, GB/T13401;ASTM B16.9 Material Carbon steel, alloy steel, stainless steel Connection Butt-welding,forged ...