Seamless Structure Pipe (GB/T8162-2008) is a seamless tube for general structure and mechanical structure. It is a kind of seamless steel pipe which is divided into different kinds because of its different uses. GB/T8162-2008 (seamless pipe for structure) is mainly used in general structure and mechanical structure. Its representative materials (grades): carbon steel 20, 45 steel, Q235, alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc. Because of its different manufacturing process, it can be divided into hot-rolled (extruded) seamless steel pipe and cold-drawn (rolled) seamless steel pipe. Cold-drawn (rolled) pipes are divided into circular pipes and special-shaped pipes.
Seamless Structure Pipe
Cold drawn / Hot Rolled
10#-45#, 10Cr9Mo1VNb, 15NiCuMoNb5, 16Mn, API J55-API P110
16Mn, A53-A369, Q195-Q345, ST35-ST52
Black, mill, lacquer, or others
Structural / fluid pipe / gas / oil / and more
Free sample and shipping fee paid by customer first, return in the order
Hot Rolled Seamless Steel Pipe Crafts Process
Billet Inspection → Cutting of Qualified Billet → Heating → Hot Piercing → Rolling → Heating → Sizing → Cooling Bed → Straightening & Cutting → Cutting → NDT → Surface Inspection → Packing
Hot Expanding Seamless Steel Pipe Crafts Process
Choosing material → Steel Pipe Inspection → Cutting Material → Cleaning Pipe → On shelf → Hot Expanding → Sizing → Cooling Bed → Size Test → Straightening & Cutting → Mechanical Properties → Bevel → Hydro test → Blasting → Nondestructive test → Packing
1, Water underground
2, Sewage Treatment
3, Steel scaffolding
4, Transporting oil & gas
5, Boiler and condenser tubes
6, High-pressure applications
7, Chemical processing
Packing & Delivery
1. Bundling with steel strips,
2. Oiled and packing with plastic ends,
3. Packing in wooden case,
4. Delivery in containers,
5. Delivery in bulk cargo.
We have always been inspecting and monitoring the quality through process at control points and conducting strict inspections at every step, resulting to its high-quality products in line with world standards and customers request.
Raw material inspection: dimension and tolerance check, appearance quality check, mechanical properties testing, weight check and raw materials quality assurance certificate check.
Semi-finished goods inspection: physical and chemical inspection, leakage magnetism and ultrasonic inspection.
Finished goods inspection: dimension and tolerance, appearance quality check and mechanical properties testing.
Inspection before ex-factory: We arrange our QC staff to manufacture's plant for final quality and packing inspection each time before we deliver goods to port for shipping, and the connected sales staff will be with QC staff to make sure we did everything fully and strictly meet customer's requirements.
Q: What about your payment term?
A: Usually T/T or L/C, 20% deposit and 80% before delivery / copy of BL.
Q: What about your standard delivery date?
A: 30 days after receiving deposit.
Q: How about your capacity?
A: For steel pipes, 50,000 tons per month, 600,000 tons per year. For pipe fittings, 30,000 tons per year.
Q: What about your package
A: Usually as per customer's requests.
Common packing information: Small size in bundles, big size in bulk, some sizes with plastic cap to protect both ends, seaworthy packaging.
Q: What is your main market &main customers
A: We have 12 years experience on steel pipes & pipe fittings. Our main market includes China, Singapore etc. Main Customers including HYST, Keppel group etc.
Q: If products have some quality problem,how would you deal with?
A: We will responsible for all of our quality problems.
We are pleased to provide you with best services in consulting, purchasing, transportation, installation, and after-sales services.