API 5L Large Diameter Spiral Pipe Surface:lightly oiled:black ,bare,vanish coating,anti-rust oil,3PE 2PE FBE coal tar epoxy anti-corrosive paint (also have other kinds according to customer’s requirements), PI 5L Large Diameter Spiral Pipe Technical:Double sides submerged arc welding pipe, API 5L Large Diameter Spiral Pipe Certificate:ISO 9001-2008, API 5L, Package details:In bundles,case packing or bundle pack,hexagonal bundles of max,two tags on each bundle,wrapped in waterproof paper,PVC sleeve sackcloth with several steel strips (All according to Customer’s requirements).