JIS carbon steel elbow we have ISO certification the quality is ... the standards such as ANSI, ASME API5L, OCT, DIN and JIS, etc. nameelbowSize1/2" - 48" Wall thicknessSch5-Sch160 XXSStandardANSI, ASME API5L ... , OCT, DIN and JIS, etc.we can also produce according to drawing and standards ...