API Standard Seamless steel pipe 1) standard:ASTM ,API,DIN,ANSI 2) material,GR.B,API 5L, 2) OD:10.3-813mm 3) ... Standard Seamless steel pipe1) standard:ASTM ,API,DIN,ANSI2) material,GR.B,API 5L,2) OD:10.3-813mm3) WT:4-60mmProduct ... , boilers, precision machines, petro-chemical, ship, structure pipe, building, fluid tubes, line pipe etcTestingwe have professional testing equipments such as ultrasonic ...