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ASTM A106/ASME SA106 is the standard specification for seamless carbon steel pipe applied for high temperature services. It includes three grades A, B and C, and common use grade is A106 Grade B. It used in different industries not only for pipeline systems like oil and gas, water, mineral slurry transmission, but also for boiler, construction, structural purposes.
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DIMENSION TOLERANCES OF SEAMLESS STEEL PIPE
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Types |
Types |
Uses |
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Hot rolled |
OD |
<50 |
±0.50mm |
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≥50 |
±1% |
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WT |
<4 |
±12. 5% |
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≥4~20 |
+15%, - 12. 5% |
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>20 |
±12. 5% |
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Cold drawn |
OD |
6~10 |
±0. 20mm |
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10~30 |
±0. 40mm |
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30~50 |
±0. 45 |
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>50 |
±1% |
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WT |
≤1 |
±0. 15mm |
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>1~3 |
+15%, - 10% |
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>3 |
+12.5%, - 10% |
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STANDARD OF ASTM A106 GR.B Seamless steel pipe
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Chemical Composition(%) |
Mechanical Properties |
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Standard |
Grade |
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Tensile Strength (Mpa) |
Yield Strength (Mpa) |
Elongation (%) |
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c |
Si |
Mn |
P |
S |
Mo |
Cr |
V |
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ASTM A106 |
A |
≤0.25 |
≤0.10 |
0.27-0.93 |
≤0.035 |
≤0.035 |
≤0.15 |
≤0.40 |
≤0.08 |
≥330 |
≥205 |
≥25 |
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ASTM A106 |
B |
≤0.30 |
≤0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.15 |
≤0.40 |
≤0.08 |
≥415 |
≥240 |
≥16.5 |
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ASTM A106 |
C |
≤0.35 |
≤0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≤0.15 |
≤0.40 |
≤0.08 |
≥485 |
≥275 |
≥16.5 |
Hot rolled manufacturing process:
Round Pipe Billet → Heating → Punching → Three-Roller Skew Rolling → Annealing →Acid Pickling→Coating Oil (Copper Plating) → Multi-pass Cold Drawing or ColdRolling → Pipe Billet → Heat Treatment → Straightening → Hydrostatic Test or Inspection → Marking → Warehousing
Cold drawn manufacturing process:
Round Pipe Billet → Heating → Punching → Pipe Head Treatment → Annealing →Acid Pickling →
Coating Oil (Copper Plating) → Multi-pass Cold Drawing or Cold Rolling → Pipe Billet → Heat Treatment → Straightening → Hydrostatic Test or Inspection → Marking → Warehousing
Package of carbon steel seamless pipe
Plastic caps plugged at the two sides of pipe ends
Should be avoided by the steel strapping and transport damage
Bundled signs should be uniform and consistent
The same bundle(batch) of steel pipe should be came from the same furnace.
The steel pipe has the same furnace number, the same steel grade, the same specifications.
