Specifications: 1) Standards: GB/T8163-1999, ASME SA106 Gr.B, API 5L Gr.B 2) O.D.: 10 - 114.3mm 3) Wall: 1 - 12mm Inner packing: 1) Unprotected 2) Internal and external oiled 3) External varnished with black lacquer 4) Plastic plugs or protectors Outer packing: 1) In hexagonal bundles wrapped with strong steel trip 2) Bundles: 4,000kg (8,800lbs) 3) Tubes under O.D. 60.3mm with technical details marked on tags tied to both sides of the bundle 4) Tubes above O.D. 60.3mm are paint stenciled