Seamless steel pipe production method
1. What are the basic processes for producing seamless steel pipes?
① Blank preparation ② Pipe blank heating ③ Perforation ④ Pipe rolling ⑤ Sizing and reducing diameter ⑥ Finishing, inspection and packaging for storage.
2. What are the production units for hot-rolled seamless steel pipes?
Continuous rolling, cross rolling
How are steel pipes classified according to their uses?
Transmission pipe (GB/T 8163): oil and natural gas transmission pipe, representative materials are No. 20 steel, Q345 alloy steel, etc.
Structural pipe (GB/T 8162): Representative materials include carbon steel, No. 20, and No. 45 steel; alloy steel Q345, 20Cr,
40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
At present, seamless steel pipes are mainly used as oil pipes, boiler pipes, heat exchangers, bearing pipes and some high-pressure transportation pipelines.
What factors affect the price of steel pipes?
Transportation method, theoretical weight/actual weight, packaging, delivery date, payment method, market price, processing technology, product shortage in the market, old customers/new customers, customer scale, communication experience, environmental protection, national policies, market demand, Material, brand, inspection, quality, qualification, steel mill policy, exchange rate, shipping terms, international situation