Pipe principles
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Pipe Principles. PREPARED FOR. Pipe. Continuous Weld (CW) “Hot” mill manufacturing method Heated scalp is pulled through forming rolls and butted together forming a melted seam Basic, all-around hot water, chilled water, drain, low-med pressure steam applications . Pros Economical

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Pipe Principles

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Pipe principles

Pipe Principles

PREPARED FOR


Pipe principles

Pipe

  • Continuous Weld (CW)

    • “Hot” mill manufacturing method

    • Heated scalp is pulled through forming rolls and butted together forming a melted seam

    • Basic, all-around hot water, chilled water, drain, low-med pressure steam applications

  • Pros

  • Economical

  • Consistent seam, ideal for threading

  • Domestic

  • Uniform 10’/21’ lengths


Pipe principles

Pipe

  • Continuous Weld (CW)

    • Old-school, “Hot” mill manufacturing method

    • Heated scalp is pulled through forming rolls and butted together forming a melted seam

    • Basic, all-around hot water, chilled water, drain, low-med pressure steam applications

  • Cons

  • Scarcity

    • Only one firm continues to produce, due to EPA regulations and very high mill costs

  • Inferior bursting pressure

  • Unsuitable for roll grooving


Pipe principles

Pipe

  • Electric Resistance Weld Grade B(A53B ERW)

    • Basic, all-around 2-1/2” and larger pipe

    • Coils of steel are cold formed by rollers and arc-welded electrically, cold-style production

    • Seam is annealed via either blast furnace or chemically, to reduce martensite in weld

  • Pros

  • Wide-variety of applications

  • Ideal for all welding, grooving

  • Domestic and Import

  • Uniform 21’ lengths through 6”

  • MTR (birth cert) created for every length


Pipe principles

Pipe

  • Electric Resistance Weld Grade B(A53B ERW)

    • Basic, all-around 2-1/2” and larger pipe

    • Coils of steel are cold formed by rollers and arc-welded electrically, cold-style production

    • Seam is annealed via either blast furnace or chemically, to reduce martensite in weld

  • Cons

  • Seam is harder than that of CW

  • Inferior bursting pressure vs Seamless

    • *not per ANSI B31.1

  • Limited to standard wall


  • Pipe principles

    Pipe

    • Seamless(A106)

      • Superior to A53 and CW in all properties

      • A solid billet of steel is rotated while a mandrel shapes an interior hole in tube

    • Pros

    • Widest-variety of applications

    • Superior for all welding, grooving

    • Available in all wall thicknesses

    • MTR (birth cert) created for every length


    Pipe principles

    Pipe

    • Seamless(A106)

      • Superior to A53 and CW in all properties

      • A solid billet of steel is rotated while a mandrel shapes an interior hole in tube

    *Not necessarily superior to welded pipe

    • Cons

    • Price

    • Availability of domestic product

    • 17’-24’ lengths


    Conclusion

    Conclusion

    PREPARED FOR


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