... carbon steel flange, stainless steel flange,alloy steel flange 2) standard ASME,ANSI,API,JIS, 3) OD 1/2"-48" 1) carbon steel flange, stainless steel flange ... ,alloy steel flange2) standard ASME,ANSI,API,JIS,3) OD ... testing,hydraulic testing,spectrum testing and infrared control etc. CARBON STEEL FLANGE 150# 300# 400# 600# 900# 1500# 2500 ...