1.API 5L spiral steel pipe/ERW pipe/welded tube. 2.OD:12.7mm-2820mm,WT:0.5mm-25mm, ... ISO certification. API 5L spiral steel pipe/ERW pipe/welded tube.1.API 5L spiral steel pipe1)Standards: SY/T5037- ... Roll-up Doors, Guardrail, Plaza Structure, Signage, Road Furniture, FencingLogistics Storage Supermarket Shelves, Containers, Transport Industries, Commercial ConstructionOther Sports Apparatus, Leisure ...