The latest in 2011: National standards for the quality of seamless steel tubes There are many types of seamless steel tubes, which are suitable for a variety of industry needs. Its required market demand is in the same type of steel tubes, which is a widely used steel material. It is suitable for: structural uses, fertilizer equipment, ships, geological drilling, oil drilling, automotive axles, conveying fluids, boilers and other industries. Seamless steel pipe concrete use specification standards: 1. Structure for seamless steel pipe: GB8162-99 2. High-pressure seamless steel pipe for chemical fertilizer equipment: GB6479-1999 3. Seamless steel tubes for ships: GB5312-1999 4. Cold-drawn cold-rolled precision seamless steel pipe: GB3639-1999 5. Various alloy tubes 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo. 6. Geological drilling seamless steel pipe: YB235-70 7. Seamless Steel Pipe for Oil Drilling: YB528-65 8. Seamless Steel Pipe for Petroleum Cracking: GB9948-88 9. Petroleum drill collar special seamless tube: YB691-70 10. Seamless Steel Tube for Automotive Axle:GB3088-1999 11. Pipes used to transfer fluids: GB8163-99 12. Seamless steel tubes for boilers: GB3087-1999 13. Boiler high pressure seamless pipe: GB5310-95 (ST45.8-iii type) The above information is provided by Shandong Seamless Steel Tube Factory. The true and false are self-identifying. Our factory is not responsible for it. For more information, please visit: