ERW steel pipe

Casing Coupling,Tubing Coupling,PUP JONIT
June 26, 2016
lsaw steel pipe
LSAW steel pipe
June 26, 2016

ERW steel pipe


The ERW steel pipe is also known as straight joint pipe. According to the wall density, the bonded tube is categorized into typical types and thick-walled types. We can offer items with personalized wall thickness according to customers’ particular requirement with a thickness deviation of no more than 0.25 mm.

With sizes between 1/2 inch and 24 inch, our ERW steel pipes go through rigorous examinations and tests, so about make sure the welding quality, external size precision, ovality, cut lengths, pipe end quality, wall density tolerance, and packaging quality are all conforming to API5L, ASTMA53, GB/T9711.1, or GB/T3091 standards. Also, we can make the item according to the standard needed by customers.

Technical Specifications
Size Range: 1/2 inch ~ 24 inch (21.3 ~ 610mm).
Wall Thickness: 0.5 ~ 16mm.
Requirement: API 5L, ASTM A53, GB/T9711.1, GB/T3091.
Steel Grade: GR.A, GR.B, X42, X46, X52, X56, X60, X65, X70.
End surface: Plain end, bevel end, thread, coupling, plastic cap.
Pipe finish: Black vanish, bare, clear oil.

erw steel pipe process

erw steel pipe process

1. Uncoiling.
2. Strip Leveling.
3. End Cutting.
4. End Shearing and Welding.
5. Accumulator.
6. Forming.
7. Induction Welding.
8. Joint Heat Treatment.
9. air/Water Cooling.
10. Seam/Body UT.
11. Straightening and sizing.
12. Cutting.
13. Visual and Dimension Inspection.
14. Hydrostatic Test.
15. End Facing and Chamfering.
16. Flattening Testing.
17. Marking.
18. Length-Measuring and Weighing.
19. Seam/End UT.
20. Coating.
21. Storage.

The ERW steel pipe is also understood as straight seam pipe. According to the wall density, the bonded tube is categorized into common types and thick-walled types. We can offer items with customized wall density according to customers’ specific requirement with a thickness discrepancy of no more than 0.25 mm.

With sizes between 1/2 inch and 24 inch, our ERW steel pipes undergo strict inspections and tests, so as to make sure the welding quality, external diameter accuracy, ovality, cut lengths, pipe end quality, wall thickness tolerance, and packaging quality are all conforming to API5L, ASTMA53, GB/T9711.1, or GB/T3091 requirements. 

Out Diameter1/8 inch to 24 inch
Wall Thicknessmax 26.5mm

Tolerance of Outside Diameter

StandardOut DiameterTolerance of Pipe EndTolerance of Pipe Body
API 5L219.1~273.1+1.6mm, -0.4mm±0.75%
274.0~320+2.4mm, -0.8mm±0.75%
323.9~457+2.4mm, -0.8mm±0.75%
508+2.4mm, -0.8mm±0.75%
559~610+2.4mm, -0.8mm±0.75%

Tolerance of Wall Thickness

StandardGradeOut DiameterWall Thickness
API 5LA219.1~457+15%, -12.5%
B508~610+17.5%, -12.5%
X42-X80508~610+19.5%, -8%

Chemical Analysis and Mechanical Properties

StandardClassGradeChemical Analysis(%)Mechanical Properties(min)(Mpa)
CMnPSTensile StrengthYield Strength
API 5LPSL1B0.261.200.0300.030414241




  1. Exactly what is the difference between erw pipeline as well as seamelss pipes?

    • abtersteel says:

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      brand new things the proper below! Best of luck for the next!

  2. Bennyneurb says:

    Difference between ms pipe and erw pipe?

    • admin says:

      MS pipe refers to mild steel pipe and ERW pipe is electric resistance welding pipe. The difference is ERW is made of very fine hard steel, while MS (black pipe) is made of malleable steel.

  3. Alfredkal says:

    How to identify seamless steel pipe and Erw welded pipe??

    • admin says:

      ERW steel pipe:You can see the weld straight down the length of the pipe.
      Seamless steel pipe : You can’t see the welded straight length…on the steel pipe…

      • admin says:

        If it is ASTM A53, Type S means seamless.
        Type F is furnace but welded,
        Type E is Electrical resist welded.
        To identify that a pipe supplied is seamless or ERW, Simply read the stencil on the side of the steel pipe.

        • admin says:

          Put H2So4 or HNo3 acid on the edges.
          It is only possible when the pipe ends are open. You can do a Macro-test.
          If it is welded, it will show the weld boundries. If not welded it will not show edges.

    • admin says:

      Process erw pipe is specially designed for particular applications to ensure that it will meet health and safety standards, in addition to suiting the needs of a given manufacturing process.
      Process erw pipe is the system of pipes transport process fluids, such as industrial gases, fuels or water, around an industrial facility involved in the manufacture of products or the generation of power.

  4. Binanceorem says:

    Is this the erw steel pipe low carbon steel or high carbon steel ?

  5. ScottKag says:

    What is api for short?

    • admin says:

      API American Petroleum Institute standard –API (American Petroleum Institute) abbreviation.
      While manufacturing ERW steel pipes, only high-quality, continuous-cast, fully killed, control-rolled, fine-grain, low-carbon steel is used. High performance ERW steel pipes and tubing possess high strength corrosion resistance, high deformability, high strength and high toughness.

  6. Eluddilt says:

    Is there an oil casing made of welded ERW pipe?

    • admin says:

      Yes, of course.
      My Company is Quality Seamless Casing Pipe manufacturers & exporter. ABTER STEEL SALES Hot Rolled Seamless Casing Pipe Non – Alloy API 5CT K55 J55 N80 For Oil / Gas Drilling from China manufacturer.

  7. RubenClido says:

    What is the erw production process?

    • admin says:

      The first process of producing Erw Tube is hoop slitting hot coil in a fixed width. After welding & removing bead through forming roll,the form of Erw Tube is sized at the sizing roll within the common difference,cut with lighteousness foot,going through roughing tube inspection and having degree of straight collected at straightner.The end section of tube goes through water pressure testing for correcting the pressure according to the size after being faced plain or bevel to its use.

  8. Zafar-Islamov-an says:

    Structurals and Standard Pipe : TMK produces hot finished structural hollow sections of non-alloy and fine grain steel according to the standard DIN EN 10210-1,2 and cold-formed seamless and welded carbon steel structural tubing in rounds in accordance with ASTM A500.

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