... 5L: GR A, GR B, X42,X46, X56, X60,X65,X70, X80ASTM A252 GR 1, GR 2, GR 3ASTM A53: GR A, GR B, GR C, GR ... DBS 4360: Grade 43, Grade 50EN: S275, S275JR, S355JRH, S355J2H 5.Standard: API 5L, API ... can be supplied according to GB, ASTM, API, DIN, JIS standards, the factory is located ... : +86-15226605670 albaba express erw api 5l gr.b spiral welded steel pipe