Manufacturing- Seamless Pipes

seamles-pipe

SEAMLESS PIPE
In the seamless pipe-making process tube rounds are heated in the furnace, after which they are pierced, then rolled by Mandrel or Plug-Mill process into pipes and tubes of specified diameters and wall thickness. Seamless tubular products are generally hot-rolled, but can also be supplied cold-drawn when required. The Push-Bench process can also be used in the manufacture of seamless pipe. In this process, a steel billet is furnace heated to the plastic state and partly punched at one end to take a mandrel. The billet is then forced by the mandrel through a series of gradually reducing dies. Until the required diameter has been attained, the I.D. being determined by the size of the mandrel.

SPECIFICATIONS
API 5L 5LX, ASTM A53, ASTM A106, ASTM A333, ASTM A335

Sizes
Up to 26??? OD

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ASTM A53 / A53M ??? 12

Seamless and Welded Standard Pipe

Specification A53 covers seamless and welded, black and hot-dipped galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding.

MECHANICAL PROPERTIES?? – TENSILE REQUIREMENTS

SEAMLESS AND ERW GRADE A GRADE B
Tensile Strength, min, psi 48,000 60,000
Yield Strength, min, psi 30,000 35,000

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CHEMICAL REQUIREMENTS

SEAMLESS AND ERW C max % Mn max % P max % S max %
GRADE A 0.25 0.95 0.05 0.045
GRADE B 0.30 1.20 0.05 0.045

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ASTM A106 / A106M ??? 13

Seamless Carbon Steel Pipe

Specification A106 covers seamless carbon steel nominal wall pipe for high-temperature service, suitable for bending, flanging and similar forming operations. Surface finish are outlined in the specification. Purchaser may specify NDE in lieu of hydrostatic test or neither. Unless otherwise specified, pipe is furnished with plain ends.

MECHANICAL PROPERTIES?? – TENSILE REQUIREMENTS

SEAMLESS GRADE A GRADE B GRADE C
Tensile Strength, min, psi 48,000 60,000 70,000
Yield Strength, min, psi 30,000 35,000 40,000

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CHEMICAL REQUIREMENTS

SEAMLESS GRADE A GRADE B GRADE C
Carbon max. % 0.25 0.30 0.35
Manganese % 0.27-0.93 0.29-1.06 0.29-1.06
Phosphorus max % 0.035 0.035 0.035
Sulfur max % 0.035 0.035 0.035
Silicon min % 0.10 0.10 0.10

Seamless Pipes

In the seamless pipe-making process tube rounds are heated in the furnace, after which they are pierced, then rolled by Mandrel or Plug-Mill process into pipes ??Read more

ERW Pipes

At the pipe mill the strip is uncoiled, levelled and crop-sheared. It is then trimmed on both sides simultaneously to correct width and immediately fed into the forming ????Read more

Spiral Weld Pipes

Spiral Weld as the name applies, is a steel pipe that has a seam running its entire length in a spiral form. In the past due to the method of manufacture, ??Read more

Submerged Arc Weld

Welding process wherein the required are usually accomplish in separate processes, hence the word ???double???. These separate welds consume a portion of the other ??Read more