Double Submerged Arc Welded Steel Pipe

Product Name Double-faced Spiral Arc
Merged Welded Steel Pipe
OD 159--3020mm in Theory
Thickness 4--25mm in Theory
Length Usually 6~12 Meters,
120 Meters Max in Theory
Standard SY/T5037 SY/T5040 GB/T9711
API5L EN10208 ASTM A252 JISA5525
Chinese Grade Q235,Q345,S245,S290,S320,S360,S390,S415,S450
Foreign Grade ASTM Grade A,Grade B,X42,
EN S185,S235JR,S235JO,E335,S355JR,S355JO
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Product Details

Product Details

The double submerged arc welded steel pipe adopts the advanced technology which is available to penetrate 100% of the pipe wall and produce a very strong bond of the pipe.

With the scientific and ergonomic design, it has the round shape which is convenient to process with simple operation and procedures, which can greatly enhance the working efficiency with large capacity of water to pass through.

Double Submerged Arc Welded Steel Pipe

Product Specification

Product Name

Double-faced Spiral Arc Merged Welded Steel Pipe



159--3020mm in Theory


4--25mm in Theory


Usually 6~12 Meters, 20 Meters Max in Theory


SY/T5037  SY/T5040  GB/T9711  API5L  EN10208  ASTM A252  JISA5525


Chinese Grade


Foreign Grade


Grade A,Grade B,X42,X46,X52,X56,X60,X65,X70




Used For Water, Sewage, Gas, Stream, Combustible Fluids(Petroleum and Gas)  


Beveled (Can be Protected By Plastic Caps or Steel Rings According to Your Requirements)Also We Can Weld Flanges on the Pipe Ends Plain Ends


Bared Or Paint With Oil, Bitumen,1-3 layer PE


With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test,
Dimensional and Visual Inspection, Also With Nondestructive Inspection


Hot Rolled and SSAW or DSAW


Package With Steel Strip When O.D≤273MM, Otherwise In Bulk.

Date of Delivery

According to The Specifications And the Quantities,
Time Begin When We confirm the Date of the Earnest or L/C

Method of Payment

T/T  L/C  West Union

Method Of Delivery

Terms According To the <INCOTERMS 2000> for International Trading,




Double Submerged Arc Welded Steel Pipe

Manufacturing technology of big straight seam submerged arc welding steel pipe

The pipe is mainly used for the pipeline transportation of Marine and land oil and gas, oil and natural gas, coal and mining materials, etc. It is especially suitable for the "west-east gas transmission" project under construction in China, and can also be used for export and alternative import.

Germany SMSMEER, Japan NKK, Japan O.T.K (Osaka special steel pipe factory), India WELSPVN pipe making company, Korea hyundai heavy industry and shiya company, all have their unique pipe making technology, are the elite of international pipe making industry.

International pipe production technology and characteristics, the foreign production of large straight seam submerged arc welding pipe forming methods: UOE method, CFE roll forming method, RBE roll bending method, JCOE forming method, C forming method, PFP progressive bending forming method.A brief introduction is as follows:1. The UOE method first presses the steel plates with pre-bending edges into u-shape in the forming die of the u-press, and then presses them into o-shape in the forming die of the o-press and welds them into tubes before overall diameter enlargement.

The UOE process is one of the most advanced processes in the world today. There are now nearly 30 such welded tube forming units worldwide. 

2. The roll forming machine of CFE method is composed of preforming frame, flat roll frame, edge bending roll and small row roll frame. Due to the setting of many identical small row rolls, the track of steel plate edge in the forming process is almost straight, avoiding the phenomenon of "edge stretching".The quality of CFE forming is good, and the product quality is no different from UOF forming.This method is different from other forming methods in that the raw material is hot rolled strip steel coil.It is mainly suitable for the production of large quantities and single varieties of steel tubes, but it is difficult to produce high strength thick wall steel tubes and large diameter steel tubes. 

3. The RBE roll bending method, which involves rolling steel plates between three or four rollers for many times, produces welded tubes that are close to UOE welded tubes in performance and reliability.In recent years, RBE method has been applied in some developing countries due to its low investment, fast plant construction, moderate output, great flexibility and strong adaptability to the market.However, due to the lack of support in the middle part of the upper roll formed by this forming method, the diameter of the formed steel tube cannot be less than 508mm (20in) due to its stiffness, which reduces the market share. The diameter of many pipes in China is below 508mm. 

4.JCOE forming method: firstly, press the steel plate into a J shape on the hydraulic press; then press the edges on both sides; then press the steel plate into a C shape after several times of stamping; finally, press the steel plate into an O shape through the semi-o mold.The JCOE method is similar in quality to the UOE welded pipe, and the line price is much lower than the UOE unit, but its production efficiency is low. The C forming method USES two C forming machines instead of the U and O presses in the UOE unit. 

The forming process is as follows: the steel plates with preformed edges are formed first on one half of the steel plates on the first press, and then on the other half of the steel plates on the other press to form the o-tubes.The size of welded pipe produced by C forming method is suitable, the output is moderate, and the price of production line is low. 

6.PFP progressive bending forming method is to bend the steel plate pre-bent at the end on the pressure machine with smaller step length and more times, and finally to form the round pipe through the joint welding machine.The PFP method can produce welded pipes of different diameters and wall thicknesses with a diameter less than 406mm. The welded pipes produced by this method are of good quality and moderate output.

Product manufacturing process



Product details


Certifications of product


Product Applications



Packaging and transportation


Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.

 has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation. 

We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel coiled pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.



Why to choose us?

1.We provide products to our customers individual specifications and special needs with competitive price and best service.

2. Immediate respond

We will be 24/7 on line at your services. Provide one-to-one service with our sincerity.

3. Professional suggestions

We could provide you the professional suggestion with our expertise acumen.

4. Short delivery period

We are based on a long-term cooperation with several major domestic steel company with an outstanding advantage is sufficient supply. Shorter the supplying period.






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