Large Diameter Spiral Welded Steel Pipes/Tubes
描述
Carbon Seamless Steel Pipe
Seamless steel pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless steel pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids.
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Product |
SMLS Pipe, CS Pipe |
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Application |
In Petroleum, Aerospace, Chemical, Power, Boilers, Military Industry |
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Pipe Standard |
ASTM A106/A53/A500/ASME SA106/SA53/DIN1629/JIS G3444/G3445/G3452 |
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Size |
OD: 1/8” – 36” |
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WT: SCH 10, 30, 40, 60, 80, 120, 140, 160, XS, XXS, STD |
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Length: Single Random, Double Random, Cut Length |
Standard: ASTM A106/A53/A500/ASME SA106/SA53/DIN1629/JIS G3444/G3445/G3452
Certificate: ISO 9001, ISO 14001, ISO 45001, CE
Out Diameter: 1/8 – 36inch (10.3-914.4mm)
Wall Thickness: 1.25 – 50mm
Length: Random Length, Fixed Length, SRL, DRL
Steel Grade:
ASTM A53/ASTM A106: GR A, GR B, GR CASME
ASME A500: GR.A, GR.B, GR.C, GR.D
|
ASTM A53 |
Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless |
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ASTM A106 |
Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service |
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ASTM A500 |
Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes |
Test Required:
Chemical Analysis, Mechanical Test, Visusal Inspection , Tension Test, Dimension Check, Bend Test , Flattenting Test, Impact Test, DWT Test, NDT Test, Hydrostatic Test, Hardness Test
Chemical Composition and Mechanical Properties
|
Standard |
Grade |
Chemical Components (%) |
Mechanical Properties |
|||||
|
C |
Si |
Mn |
P |
S |
Tensile STrength(Mpa) |
Yield STrength(Mpa) |
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ASTM A53 |
A |
≤0.25 |
– |
≤0.95 |
≤0.05 |
≤0.06 |
≥330 |
≥205 |
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B |
≤0.30 |
– |
≤1.2 |
≤0.05 |
≤0.06 |
≥415 |
≥240 |
|
|
A |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥415 |
≥240 |
|
|
B |
≤0.35 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥485 |
≥275 |
|
|
ASTM A500 |
A |
≤0.26 |
– |
≤1.35 |
≤0.035 |
≤0.035 |
≥310 |
≥230 |
|
B |
≤0.30 |
– |
≤1.40 |
≤0.045 |
≤0.045 |
≥400 |
≥290 |
|
|
C |
≤0.23 |
– |
≤1.35 |
≤0.035 |
≤0.035 |
≥425 |
≥315 |
|
|
D |
≤0.27 |
– |
≤1.40 |
≤0.045 |
≤0.045 |
≥400 |
≥250 |
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Tolerances of carbon seamless steel pipe
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Pipe types |
Pipe sizes(mm) |
Tolerances |
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Hot rolled |
OD<50 |
±0.50mm |
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OD≥50 |
±1% |
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WT<4 |
±12.5% |
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WT 4～20 |
+15%, -12.5% |
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WT>20 |
±12.5% |
|
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Cold drawn |
OD 6～10 |
±0.20mm |
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OD 10～30 |
±0.40mm |
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OD 30～50 |
±0.45 |
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OD>50 |
±1% |
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WT≤1 |
±0.15mm |
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WT 1～3 |
+15%, -10% |
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|
WT >3 |
+12.5%, -10% |
Hot Rolling Seamless Steel Line Pipe Manufacturing / Production processes
Rolled Round Billets – Examination – Cut Off – Heating – Piercing – Elongation – Slight Tension Reducing – Straightening – Corp End Cutting Off – Visual Inspection – NDT – Hydrostatic Test – Ends Procession – Product Inspection – Painting and Marking – Packing – Warehousing
Cold Drawn (Rolled) seamless steel pipe manufacturing process
Mother pipe (Normally for hot rolled pipe) – Inspection – Annealing – Ends Treatment (Hitting and Drilling hole) – Pickling – Grinding – Phosphorization (Annoit) – Cold Drawn (Rolled) – Degreasing and Cleaning – Heat treatment (Solution treatment) – Straightening – Hydrostatic test – Painting and Marking – Warehousing
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