Large diameter longitudinal submerged arc welded pipe materials

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28 m.t.
Supply Capability:
9000 m.t./month

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Product Description:

1Structure of Welded Steel Tube: 

Welded Steel Tube is formed by drawing a solid billet over a piercing rod to create the hollow shell. We are company that have many years experience and professional manager team and engineer team and sales team, sure we will provide you high quality of welded pipe and professioanl service.


2‍‍Main Features of the Welded Steel Tube:

• High manufacturing accuracy

• The higher strength

• The small inertia resistance

• Strong heat dissipation ability

• Good visual effect

• Satisfy price 


3Welded Steel Tube Specification



ASTM A106-2006, ASTM A53-2007


10#-45#, 16Mn

10#, 20#, 45#, 16Mn


8 - 33 mm

Section Shape


Outer Diameter

133 - 219 mm

Place of Origin

Shandong, China (Mainland)

Secondary Or Not



Hydraulic Pipe


Cold Drawn



‍Surface Treatment

factory state or painted black

‍Special Pipe

API Pipe

Alloy Or Not




Outer Diameter



20#, 45#, Q345, API J55, API K55, API   L80, API N80, API P110, A53B




1) Material:20#(ASTM A 106/A53 GRB.API5LGRB,GB),45#,16Mn,10#.

2) Specification range:OD:21.3-610mm,WT:6-70mm,length:6-12m or according to the requirement of clients.

3) Excutive standards:GB,ASME API5L.ASTM A 106/A53,Despite of the above standards,we can also supply seamless steel pipe with standard of DIN,JIS,and so on,and also develop new products according to the requirements of our clients!
4) Surface:black lacquered,varnish coating or galvanized.
5) Ends:Beveled or square cut,plastic capped,painted.
6) Packing:bundles wrapped with strong steel strip,seaworthy packing. 


4Packaging & Delivery

Packaging   Details:

seaworthy   package,bundles wrapped with strong steel strip

Delivery   Detail:

15-30days   after received 30%TT


5FAQ of Welded Steel Tube:  

How is the quality of your products?
     We have many years business experience in this area, and we have professional engineer and manager team and sure we can provide you high quality production and professional service.

How about price?
    If you like bargain and factory price is not low enough as you think, just don’t waste your time.Please trust the quotation we would give you, it is professional one.

Why should you chose us?
    We can give you both.Additionally, we can also offer professional products inquiry, products knowledge train(for agents), smooth goods delivery, exellent customer solution proposals.Our service formula: good quality+good price+good service=customer’s trust.


6‍‍ Welded Steel Tube Images




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Q:What kinds of steel pipe are divided into?
Welded pipe: also known as welded pipe, is made of steel or steel strip after bending forming, and then made by welding. In accordance with the form of weld is divided into longitudinal welded pipe and spiral welded pipeSpecifically refers to the use of welded steel strip or plate bending deformation of round, square shape after welded, surface jointed steel pipe. The welding steel billets is used in steel plate or strip. The welded pipe production process simple, high production efficiency, great variety, less capital equipment, but since the general strength is less than that of seamless steel.20 century 30s, along with the rapid development of high-quality strip rolling production and progress of welding and testing technology, and constantly improve the weld quality, varieties and specifications of welded steel pipe is increasing, and instead of the seamless steel pipe in more and more fields. Compared with welded steel seamless steel tube with low cost and high production efficiency.
Q:Outside diameter 60, thickness 3.5 seamless steel tube, how many kilograms per meter?
Steel tube Kg/m (including seamless steel tubes and welded tubes) theoretical formula per meter weight: W=0.02466 * S * (D-S)Of which: S - wall thickness (mm), D - steel tube diameter (mm), W - kg / M
Q:What place must use galvanized steel pipe to make lighting line?
Galvanized pipe for pipeline laying construction and transformation of lighting, power, telephone, fire protection system in the engineering (made of galvanized steel), for laying, laying can be laid in the dark, the wall can also be installed on the ceiling.
Q:DN80 seamless steel tube, what is the standard thickness?
Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter and nominal diameter. Tubes are made of seamless steel tubes. The outer diameter of the tubes is indicated by the letter D, followed by additional outer diameter dimensions and wall thicknesses such as seamless steel tubes with an outer diameter of 108.
Q:What is the difference between seamless steel pipe and welded pipe?
Such as hydraulic equipment pipeline connection. The weld seam of common steel pipe is its weak link, and the quality of weld is the main factor that affects its overall performance. People who have lived in the north have experienced the experience of freezing pipes and pipes in winter, and the places where they burst are usually welds. Welded pipe is not seamless steel pipe.
Q:What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?
DN (nominal diameter) 250 is generally the industry said 273, welded steel pipe (spiral steel pipe) thickness is generally between 6-8mm, more common.
Q:What is the buckling type thin-wall steel pipe? What is a tight set of thin-walled steel tubes? What's the difference between the two?
The thread of the tightening (JDG) joint is unified with an outer thread, a wall thickness of 1.5mm, and a button (KBG). The thread of the joint is an internal thread, and the wall thickness is 1.0mm. Withholding type joint for the use of the same company and pipe connection to matching products with complete connection clamp buckle. Fastening and pressing type correctly connected and locked after no need to do a cross ground.
Q:What is the process of spiral steel tube production?
Shear forming: on the production line will be along the outer edge of the spiral plate winding tube.
Q:What does "HBB" glass steel pipe mean?
The utility model has the advantages of high strength, light weight, no deformation, smoothness of the inner surface, etc.. The friction coefficient is small, the cable is light and smooth, and the cable is not damaged. The weight is only 1/4 of the steel tube, and the 1/10 of the concrete pipe can be moved by one person. The transportation is convenient and the construction is simple and convenient.
Q:RC is it welded steel pipe or galvanized steel pipe?
RC pipe is galvanized steel pipe, usually followed by the diameter, such as RC50, that is, 50mm galvanized steel pipe.

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