Seamless pipe of various materials

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25 m.t.
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9000 m.t./month

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1Structure of  Seamless  pipe  of  various  materials

Seamless pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell. As the manufacturing process does not include any welding, seamless pipes are perceived to be stronger and more reliable. Historically seamless pipe was regarded as withstanding pressure better than other types, and was often more easily available than welded pipe. Seamless steel pipe has a hollow section, a large number of pipes used for conveying fluid, such as oil, natural gas, gas, water and some solid materials, etc


2‍‍Main Features of  Seamless  pipe  of  various  materials

• High manufacturing accuracy

• Small inertia resistance

• Good visual effect

• Reasonable price 


3 Seamless pipe of  various  materials 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  Seamless  pipe  of  various  materials

How is the quality of your products?
    Our products are manufactured strictly according to national and internaional standard, and we take a test 
on every pipe before delivered out. If you want see our quality certifications and all kinds of testing report, please just ask us for it.
Guaranteed: If products’ quality don’t accord to discription as we give or the promise before you place order, we promise 100% refund.

How about price?
    Yes, we are factory and be able to give you lowest price below market one, and we have a policy that “ for saving time and absolutely honest business attitude, we quote as lowest as possible for any customer, and discount can be given according to quantity”,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?
    Chose happens because of quality, then price, 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
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem.


6 Seamless pipe of  various  materials Images ‍‍


Seamless  pipe  of   various  materials

Seamless  pipe  of   various  materials



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Q:What is an electric welded pipe (EFW)? Seek help!
According to the operation requirements of the electric welding machine, connect the lead wire and set up the proper welding parameter of the electric welding machine, which can be operated by manual or automatic two input methods.After checking, start the electric welding machine and enter the welding process. When the welding time is reached, the machine will automatically enter the cooling state.When the pipe completely removed after cooling, electric fusion welding machine.Cutting the pipe with the cutting tool of plastic pipe or fine toothed saw with cutting guide device, and making its end face perpendicular to the axis of pipe. Remove the edges of the edges with a knife, scrape the weld area in the pipe or spigot end and clean the weld area.Should use the special fixture as far as possible to secure the components to be connected, and the roundness of the pipe shall not exceed 1.5% of the outer diameter of the pipe, or it should be corrected on the corresponding fixture.
Q:What is the meaning of "DN" and "Phi" in the dimensioning of steel pipe diameter and how to apply the mark?
DN refers to the nominal diameter of the pipe, but this is neither the outside diameter nor the inside diameter, and the "Phi" means the outer diameter of the steel pipe. For example, the same nominal diameter of the steel pipe due to its different wall thickness, corresponding to the outer diameter is also different. As can be seen from the chart below:Project control table (commonly used) diameter pressure pipe standard pressure pipe standard pressure pipe standard specification DN- nominal diameter: diameter of large diameter series DN15- 22mm DN20- 27mm DN25- phi, Phi Phi Phi Phi 34mm, DN32- 42mm DN40- 48mm DN50- 60mm DN65-, Phi Phi 76 (73) mm, DN80- 89mm DN100- 114mm DN125- and Phi Phi Phi. 140mm DN150- 168mm DN200- 219mm DN250- phi, Phi Phi Phi Phi 273mm, DN300- 324mm DN350- 360mm DN400- 406mm DN450- 457mm DN500- and Phi Phi Phi Phi, 508mm DN600- 610mm, DN15- 18mm series of small diameter Phi Phi Phi, DN20- 25mm DN25- 32mm DN32- 38mm DN40- 45mm DN50- Phi Phi, Phi Phi Phi 57mm DN65- 73mm, DN80- 89mm DN100- 108mm, DN125- 133mm DN150- 159mm DN200- and Phi Phi Phi Phi, 219mm DN250- 273mm DN300- 325mm DN350- 377mm, Phi phi,
Q:What is the difference between galvanized iron pipe and galvanized steel pipe? Or called different, in fact, is referred to as galvanized pipe?
Just name different, all refers to GB/T 3091-2015 "low pressure fluid transport welding pipe" contained in the galvanized pipe.Galvanized pipe means zinc plated, suitable for water, air, heating, steam and gas and other low pressure fluid conveying straight welded steel pipe, longitudinal submerged arc welding (SAWL) steel pipe and spiral seam submerged arc welding (SAWH) steel pipe.
Q:Fastener type steel pipe scaffold external parts name
Fastener type steel pipe scaffold fastener malleable iron casting should be adopted, its basic form has three kinds: vertical cross bar for a connection between the rectangular fastener, fastener for rotating connecting parallel or oblique bars and rods for butt joint butt joint fastener.
Q:What's the actual size of the DN25?
Steel pipe is not only used to transport fluid and powder solid, exchange heat energy, and manufacture mechanical parts and containers, but also is an economic steel. It can reduce weight and save 20 to 40% of metal by using steel pipe to make building structure, network frame, prop and mechanical support. Moreover, it can realize factory mechanization construction. Using steel pipe to manufacture road bridge can not only save steel, simplify construction, but also greatly reduce the area of coating protective layer, save investment and maintenance cost.
Q:How much is the wall thickness standard of building 48?
According to the "construction of fastener type steel pipe scaffold safety technical specifications JGJ130-2011" stipulates that the specification of steel pipe should be Phi 48.3 * 3.6, that is, wall thickness is 3.6mm.
Q:What is DN50 for welded pipe?
Refers to the use of welded steel pipe made of DN50 steel pipe, refers to the inside diameter is 50mm, the market of common DN50 pipe also refers to the 2 inch pipe, standard pipe: 3.5mm thickness, pipe diameter 60mm, the weight of 4.88kg/m theory.
Q:What is the outer diameter and wall thickness of the welded steel pipe of national standard DN250?
DN250 is the nominal diameter, the outer diameter of the steel pipe is 273mm, the thickness is above 6.5mm.
Q:What does "steel pipe SC" mean?
SC (run in welded steel duitconSC is the line laying mode GB letter of wire is worn steel pipe laying (welded steel pipe, low pressure fluid) SC70 said the conductor by low pressure fluid DN70 welded steel pipe as protection pipe laying, DN70 said the nominal pipe diameter is 70mm, the nominal pipe diameter is 70mm (a series of values, the actual diameter slightly different).
Q:What's the difference between stainless steel seamless tube and stainless steel welded pipe?
Stainless steel welded pipe is also a hollow section of steel, but it is welded through the plate into the steel pipe, so there is a welded steel pipe welding gap.

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