1. Thickness:6-40mm, OD:10-630mm 3. Certificate: ISO9001, API, CE 4. Standard: API SPEC 5CT-2006 5. Grade: N80 ERW API SPEC 5CT N80 Welded Casing Pipe 1. Thickness:6-40mm, OD:10-630mm2. Certificate: ISO9001, API, CE3. Standard: API SPEC 5CT-20064. Grade: N805. Package: bundles by steel strip, seaworthy packing, or as customer's requirements ERW API 5CT N80 Welded Casing Pipe