1.API 5L spiral steel pipe/ERW pipe/welded tube. 2.OD:12.7mm-2820mm,WT:0.5mm- ... Impact Test etc), Exterior Size InspectionUsage1>Construction Hall Structure, Sea Trestle, Airport Structure, Shipbuilding, Security Door Frames, Garage Doors, ... 4>Traffic Walking Rails, Roll-up Doors, Guardrail, Plaza Structure, Signage, Road Furniture, FencingLogistics Storage Supermarket Shelves, Containers, ...