Process:Spiral Submerged- Arc Welded Steel Pipe Usage:Used for low pressure liquid delivery, such as water, gas, and oil; ... ") Wall Thickness:3.2mm - 25.4mm Length:6 – 22 m Steel Grade:API 5L: GR A, GR B, X42,X46, X56 ... , Impact Test, Exterior Size Inspection, Hydrostatic Test, X-ray Test Mill Test Certificate:EN 10204/3.1B