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Seamless Structure Pipe
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Product: Views:375Seamless Structure Pipe 
Unit price: Negotiable
Delivery date: Since the payment date Days delivery
Valid until: Long-term effective
Last updated: 2019-03-19 09:52

Seamless Structure Pipe

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.

Product Specification

Product name

Seamless Structure Pipe


Cold drawn / Hot Rolled

Grade Group

10#-45#, 10Cr9Mo1VNb, 15NiCuMoNb5, 16Mn, API J55-API P110
16Mn, A53-A369, Q195-Q345, ST35-ST52

Surface treatment

Black, mill, lacquer, or others


OD: 6mm~914.4mm
WT: 1mm~66mm
LENGTH: 6m~12m


Structural / fluid pipe / gas / oil / and more


Free sample and shipping fee paid by customer first, return in the order

Production Process

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

Product Photo


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.

Quality Management

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.