The common specification for the Elbow:1)      MATERIAL:ASTM A234/A234M ASTM A403/A403M ASTM A860/A860M/ASS/BSS/LTS2)      STANDARD:ASTM/ANSI/DIN/JIS/GB/BS/SH-3065-92/SH-3408/SH-3409/SH-3410/SY5257-913)      THICKNESS:SCH5S to SCH160S4)      SIZE:From 1/2 inch to 48 inches5)      SERVICES:Our products have been widely used in the oil refinery chemical,shipbuildingpharmacy and electric power.We can supply very good quality and competitive price for you.