1.API 5L spiral steel pipe/ERW pipe/welded tube. 2.OD:12.7mm-2820mm,WT:0.5mm-25mm, ... -18m. 3.API&ISO certification. API 5L spiral steel pipe/ERW pipe/welded tube.1.API 5L spiral steel pipe1)Standards: SY/T5037 ... Resources, Process Engineering, Materials Handling,Mechanical Parts 4>Traffic Walking Rails, Roll-up Doors, Guardrail, Plaza Structure, Signage, Road Furniture, FencingLogistics ...