Seamless Steel Pipes
According to production’s technology and craft of steel tube, the steel pipes may separately be produced into basic two categories such as seamless pipe and welded steel pipe (Electric resistance welding pipe and Spiral welded pipe).
Usage
Seamless steel tube often could be formed and produced through hot rolled craft and cold drawn technology. Certainly the strength of hot rolled seamless steel pipes rather than cold drawn seamless steel tubes. About its common uses respectively are
- Steam pipeline,
- Gas pipeline,
- Liquefied gas pipeline,
- Natural gas pipelines,
- All kinds of pipelines for petroleum products,
- Pipelines for conveying various other gases or liquids.
Dimension
Sino East Steel Group may produce GB standard of steel pipe to gratify domestic buyers’ demand, amid also provide wide range of international industrial standard such as ASTM, ANSI and API, ASME and so on to satisfy oversea customers.
Nominal O.D (Outer Diameter, inch)
1/2” to 24”
Wall Thickness (inch)
40” to 4,000”
Advantage
- Actually as the advantage of higher pressure-bearing capacity of seamless steel pipes, the seamless steel pipe may involve in more broad range of uses.
- Compare between solid steel (steel rod) and seamless steel pipe, the seamless steel tubes have lighter weight when its bending and torsional strength are the same, so it is an economic section steel.
- Manufacturing the ring spare parts by seamless steel pipe can improve the utilization rate of materials, simplify the manufacturing process and save material and processing time.
Seamless Steel VS Stainless Steel
Low carbon seamless steel pipe are quit similar to seamless stainless steel pipes according its process and craft, however, stainless steel pipe may be with higher flexibility and resisted acid because of content of low carbon.
TAG
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Looking for a seamless steel pipe manufacturer? Visit our seamless pipe factory profile for hot rolled & cold drawn seamless pipes, ASTM A106 / API 5L grades, MOQ and factory-direct pricing.
Seamless Steel Pipe Specification Guide
| Standard | Grade | Size Range | Application |
|---|---|---|---|
| ASTM A106 | Gr.B | 1/2″ – 24″ (21.3-609.6mm) | High-temperature service, power plants |
| ASTM A53 | Gr.B | 1/2″ – 24″ | Pressure & mechanical |
| API 5L | Gr.B, X42-X70 | 2″ – 24″ | Oil & gas pipelines |
| GB/T 8163 | 20# | 1/2″ – 24″ | Fluid transport |
| DIN 2448 | ST37, ST44 | 1/2″ – 24″ | General structural |
Seamless Steel Pipe FAQ
What is the difference between seamless and welded pipe?
Seamless pipe is formed from a solid round billet without any welded seam, giving uniform strength in all directions — ideal for high-pressure applications. Welded pipe is cheaper and suitable for lower-pressure uses.
What sizes of seamless steel pipe do you supply?
We supply seamless carbon steel pipe from 1/2 inch to 24 inches OD (21.3-609.6mm), with wall thickness from 2.0mm to 60mm, in lengths of 6m and 12m or cut to order.
What is the MOQ for seamless steel pipe?
Standard MOQ is 5 tons for stock sizes. Full-container orders receive the best FOB Tianjin pricing.
How long does delivery take?
Stock sizes ship in 7-10 days; mill-rolled orders take 20-30 days depending on grade and quantity.
Do you provide mill test certificates?
Yes, MTC is included with every shipment, and third-party inspection (SGS, BV) is available on request.
Looking for API 5L line pipe? See our API 5L seamless line pipe products — PSL1/PSL2, Grade B-X60, MOQ and factory-direct quotes.
Need Seamless Steel Pipe Pricing?
Send your specification, quantity and destination port — our export team replies within 10 business hours with a factory-direct quotation.
Or email [email protected] — every inquiry is answered by a steel export specialist.