... Standard:ASME/ANSI B16.9,DIN,JIS,GB,GOST steel fittings carbon steel Cap Size 1/2"-80"(DN15-DN200) Wall ... JIS, BS,GB, etc Material Carbon steel : ASTM A234 ,WPB ,ANSI B16.9 ; Alloy Steel ConnectionButt-welding Application:ngPetroleum Refinefies , Electric ... corrosion and high-temperature resistant with black painting Others .Special design available as the requirements of customer forged steel cap