Cold rolled ASTM A335 pipe is seamless ferritic alloy-steel pipe. Cold rolled ASTM A335 alloy steel pipe is mainly used for high-temperature service. Cold rolled ASTM A335 alloy steel pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice.
Cold rolled ASTM A335 alloy steel pipe shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.
Cold Rolled ASTM A335 Alloy Steel Pipes Specifications
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Processing
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Diameter(mm)
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Length(m)
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Straight(mm/m)
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Diameter Accuracy
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Thickness
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Roughness(mm)
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Cold drawing
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40-320
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≤12
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0.2-0.5
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H8-H10
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±5%
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0.8-1.6
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Cold rolling
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30-100
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≥12
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0.2-0.5
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H8-H10
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±5%
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0.8-1.2
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Drawing-honed
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40-500
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8
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0.2-0.3
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H7-H9
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±5%
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0.2-0.8
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Drawing-roll
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40-400
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7
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0.2-0.3
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H8-H9
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±5%
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0.2-0.4
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Deep-hole
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320-500
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8
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0.2-0.3
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H7-H9
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±8%
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0.2-0.8
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Deep-rolling
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320-500
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7
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0.2-0.3
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H8-H9
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±8%
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0.2-0.4
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