Carbon Seamless Steel Pipe Introduction
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Product: |
Seamless Pipe,Seamless Carbon Steel Pipe,Carbon Steel Seamless Pipe |
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Application: |
For converying gas, water & oil for Fluids Transmission |
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Size: |
OD: 10.3-1219.2mm |
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WT: 1.65-60mm |
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LENGTH: 5.8/6/11.8/12m |
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Pipe Standard: |
API 5L |
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ASTM A106 |
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JIS G3454,G3455,G3456 |
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DIN1629/EN10216-1 |
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EN 10208 |
Product Display & Application
Seamless Carbon Steel Pipe Specification
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NOMINAL PIPE SIZE |
OD (mm) |
NOMINAL WALL THICKNESS
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DN |
NB(inch) |
ASME |
SCH10 |
SCH20 |
SCH30 |
STD |
SCH40 |
SCH60 |
XS |
SCH80 |
SCH100 |
SCH120 |
SCH140 |
SCH160 |
XXS |
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15 |
1/2" |
21.3 |
2.11 |
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2.41 |
2.77 |
2.77 |
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3.73 |
3.73 |
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4.78 |
7.47 |
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20 |
3/4" |
26.7 |
2.11 |
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2.41 |
2.87 |
2.87 |
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3.91 |
3.91 |
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5.56 |
7.82 |
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25 |
1" |
33.4 |
2.77 |
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2.9 |
3.38 |
3.38 |
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4.55 |
4.55 |
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6.35 |
9.09 |
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32 |
1.1/4" |
42.2 |
2.77 |
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2.97 |
3.56 |
3.56 |
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4.85 |
4.85 |
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6.35 |
9.7 |
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40 |
1.1/2" |
48.3 |
2.77 |
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3.18 |
3.68 |
3.68 |
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5.08 |
5.08 |
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7.14 |
10.15 |
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50 |
2" |
60.3 |
2.77 |
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3.18 |
3.91 |
3.91 |
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5.54 |
5.54 |
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8.74 |
11.07 |
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65 |
2.1/2" |
73 |
3.05 |
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4.78 |
5.16 |
5.16 |
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7.01 |
7.01 |
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9.53 |
14.02 |
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80 |
3" |
88.9 |
3.05 |
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4.78 |
5.49 |
5.49 |
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7.62 |
7.62 |
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11.13 |
15.25 |
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90 |
3.1/2" |
101.6 |
3.05 |
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4.78 |
5.74 |
5.74 |
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8.08 |
8.08 |
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100 |
4" |
114.3 |
3.05 |
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4.78 |
6.02 |
6.02 |
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8.56 |
8.56 |
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11.13 |
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13.49 |
17.12 |
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125 |
5" |
141.3 |
3.4 |
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6.55 |
6.55 |
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9.53 |
9.53 |
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12.7 |
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15.88 |
19.05 |
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150 |
6" |
168.3 |
3.4 |
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7.11 |
7.11 |
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10.97 |
10.97 |
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14.27 |
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18.26 |
21.95 |
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200 |
8" |
219.1 |
3.76 |
6.35 |
7.04 |
8.18 |
8.18 |
10.31 |
12.7 |
12.7 |
15.09 |
18.26 |
20.62 |
23.01 |
22.23 |
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250 |
10" |
273 |
4.19 |
6.35 |
7.8 |
9.27 |
9.27 |
12.7 |
12.7 |
15.09 |
18.26 |
21.44 |
25.4 |
28.58 |
25.4 |
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300 |
12" |
323.8 |
4.57 |
6.35 |
8.38 |
9.53 |
10.31 |
14.27 |
12.7 |
17.48 |
21.44 |
25.4 |
28.58 |
33.32 |
25.4 |
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350 |
14" |
355.6 |
6.35 |
7.92 |
9.53 |
9.53 |
11.13 |
15.09 |
12.7 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
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400 |
16" |
406.4 |
6.35 |
7.92 |
9.53 |
9.53 |
12.7 |
16.66 |
12.7 |
21.44 |
26.19 |
30.96 |
36.53 |
40.19 |
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450 |
18" |
457.2 |
6.35 |
7.92 |
11.13 |
9.53 |
14.27 |
19.05 |
12.7 |
23.83 |
39.36 |
34.93 |
39.67 |
45.24 |
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500 |
20" |
508 |
6.35 |
9.53 |
12.7 |
9.53 |
15.09 |
20.62 |
12.7 |
26.19 |
32.54 |
38.1 |
44.45 |
50.01 |
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550 |
22" |
558.8 |
6.35 |
9.53 |
12.7 |
9.53 |
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22.23 |
12.7 |
28.58 |
34.93 |
41.28 |
47.63 |
53.98 |
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600 |
24" |
609.6 |
6.35 |
9.53 |
14.27 |
9.53 |
17.48 |
24.61 |
12.7 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |
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650 |
26" |
660.4 |
7.92 |
12.7 |
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9.53 |
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12.7 |
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700 |
28" |
711.2 |
7.92 |
12.7 |
15.88 |
9.53 |
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12.7 |
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750 |
30" |
762 |
7.92 |
12.7 |
15.88 |
9.53 |
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12.7 |
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800 |
32" |
812.8 |
7.92 |
12.7 |
15.88 |
9.53 |
17.48 |
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12.7 |
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850 |
34" |
863.6 |
7.92 |
12.7 |
15.88 |
9.53 |
17.48 |
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12.7 |
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900 |
36" |
914.4 |
7.92 |
12.7 |
15.88 |
9.53 |
19.05 |
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12.7 |
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Carbon Seamless Pipe Standard
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Executive Standard |
Grade / Material |
Product Name |
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ASTM A53 |
A, B |
Black and Hot-Dipped Zinc-Coated Steel Pipes Welded and Seamless |
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ASTM A106 |
A, B |
Seamless Carbon Steel for High Temperature Service |
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ASTM A179 |
Low Carbon Steel |
Seamless Cold-Drawn Low-Carbon Steel Heat Exchanger and Condenser Tubes |
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ASTM A192 |
Low Carbon Steel |
Seamless Carbon Steel Boiler Tubes for High Pressure |
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ASTM A210 |
A1, C |
Seamless Medium-Carbon and Alloy Steel Boiler and Superheater Tubes |
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ASTM A213 |
T5, T11, T12, T22 TP 347H |
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes |
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ASTM A312 |
TP304/304L, TP316/316L |
Seamless Steel Pipe for Stainless Materials |
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ASTM A333 |
Gr.6 |
Seamless and Welded Steel Pipe for Low-Temperature Service |
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ASTM A335 |
P9, P11, P22 |
Seamless Ferritic Alloy Steel Pipe for High-Temperature Service |
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ASTM A519 |
4130,4140 |
Seamless Carbon and Alloy Steel for Mechanical Tubing |
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ASTM A789 |
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Seamless Ferritic/Austenitic Stainless Steel Tubing for General Service |
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Executive Standard |
Grade / Material |
Product Name |
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API Spec 5CT |
J55, K55, N80, L80,C90, C95, T95, P110, M65 |
Spectification for Casing and Tubing |
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API Spec 5L PSL1 / PSL2 |
A,B X42, X46, X52, X56, X60, X65,. X70 |
Specification for Line Pipe |
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Executive Standard |
Grade / Material |
Product Name |
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DN 17175/EN10216-2 |
ST35, ST45, ST52, 13CrMo44 |
Seamless Steel Tube for Elevated Temperature |
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DIN 2391/EN10305-1 |
St35, St45, St52 |
Cold Drawn Seamless Precision Pipe |
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DIN 1629/EN10216-1 |
St37, St45, St52 |
Seamless Circular unalloyed Steel Tubes Subject to Special Requirments |
Uses of Black Steel Seamless Pipe
| Chilled water pipe | Steam/condensate pipe |
Heat exchanger pipe |
Marine/offshore pipe |
Dredging pipe |
Industrial pipe |
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Oil and gas pipe |
Fire fighting pipe |
Construction/structure pipe |
Irrigation pipe |
Drain/sewage pipe |
Boiler tube |
Seamless Carbon Steel Pipe Catalogue
| Types | Application |
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Structure Purposes |
General structure and mechanical |
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Liquid Services |
Petroleum, gas and other fluids conveying |
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Low and Medium Pressure Boiler Tube |
Steam and boiler manufacturing |
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Hydraulic Pillar Service |
Hydraulic support |
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Auto Semi-shaft Casing |
Auto sem-shaft casing |
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Line Pipe |
Oil and gas conveying |
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Tubing and Casing |
Oil and gas conveying |
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Drill Pipes |
Well drilling |
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Geological Drilling Pipe |
Geological drilling |
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Furnace tubes, heat exchangers tubes |
Furnace tubes, heat exchangers |
Seamless CS Pipe Coating
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3PE Coating |
3PP Coating |
FBE Coating |
Epoxy Coating |
Special Painting | gi Coating |
Application of Carbon Steel Seamless Pipes
Carbon steel seamless pipes are extensively applied in the nuclear device, gas conveyance, petrochemical, shipbuilding and boiler industries, with characteristics of high corrosion resistance combined with suitable mechanical properties.
- Nuclear device
- Gas conveyance
- Petrochemical industries
- Shipbuilding and boiler industries
Cold Drawn Tube / Hot Rolled Tube Process
Inspection Of Seamless CS Pipe
-- Non-destructive testing (RT, UT, MT or PT).
-- Heat treatment execution, if specified.-- Hydrostatic test, if applicable.
-- Visual and dimensional control.
-- Final visual inspection including packaging and quantity control.
- 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.
It's not just "no weld seam" — it's about metallurgical continuity:
(1) No HAZ — the heat-affected zone in ERW has altered hardness and creee behavior
(2) No stress concentration — weld reinforcement geometry creates localized stress risers
(3) Homogeneous microstructure — seamless has uniform grain structure through the wall
(4) Pressure rating — ASME B31.3 assigns E=1.0 to seamless vs E=0.85 for ERW
At temperatures above 400°C, weld seam creep becomes the failure mode.
Xenith Steel supplies ASTM A106 seamless for refinery superheater coils and high-temperature process piping.
The secret is shear stress — not compression:
(1) Two inclined rolls rotate the billet, creating diagonal tension in the center
(2) The mandrel contacts the point to prevent wall collapse during piercing
(3) Tension + compression = through-wall shear fracture = clean bore
Why this matters:
ERW uses tension to form but the steel flows — Mannesmann uses tension to tear cleanly.
The cross-rolling angle (8-15°) and feed angle (20-30°) determine bore quality.
Xenith Steel's piercing mills produce bores with < 1.0mm eccentricity for subsequent rolling.
The temperature threshold:
A106 Grade B: 480°C max (no limit below 480°C with SMYS basis)
A53 Grade A: 425°C max per ASME B31.3
The key differences:
(1) A106 requires normalcy test at 480°C for elevated temperature service
(2) A106 has tighter sulfur (≤0.035%) and phosphorus (≤0.035%) limits
(3) A106 requires flattening and bend tests — A53 does not
(4) A106 allows pipe-to-pipe welding, A53 does not for pressure-containing
Rule of thumb: 370°C+ use A106; water/air/steam < 370°C use A53.
Creep is time-dependent plastic deformation at elevated temperature:
Stages:
(1) Transient creep — elastic adjustment, usually negligible
(2) Steady-state creep — the design basis (ε̇ = kσⁿ)
(3) Tertiary creep — accelerates to failure
For carbon steel, creep becomes significant above 425°C:
The Larson-Miller parameter estimates life: LMP = T(C + log(t))
C ≈ 20 for carbon steel
Example: A106 at 480°C, design life 100,000 hours = predicted 45% yield stress
Prevention:
Select material with adequate creep strength per ASME Boiler Code.
Heat treatment determines microstructure — and that determines capability:
Normalized (900-960°C, air cool):
(1) Uniform pearlitic structure throughout the wall
(2) Removes rolling texture for isotropic properties
(3) Required for A106 Grade C (carbon > 0.25%)
Full anneal (900-960°C, furnace cool):
(1) Coarse pearlite + ferrite — softer, more machineable
(2) Lower yield strength (~30% lower)
(3) For cold-forming applications
Quench + temper (850°C → water quench → 550-650°C temper):
(1) Tempered martensite — higher strength
(2) Higher toughness
(3) For low-temperature service
Select based on subsequent processing and service temperature.
Per ASTM A530/A106:
P = 2St/D (thin wall formula)
Where:
S = 60% of specified minimum yield (SMYS) for mill test
t = wall thickness
D = outside diameter
The "P" formula vs "H" pressure:
Hydrostatic (H) uses higher S (87.5% SMYS for PSL1) for service
Mill test uses 60% to avoid plastic deformation during testing
Minimum test duration: 5 seconds
Hold pressure — any visible leakage or sweating = reject
Xenith Steel hydrotests each pipe with pressure transducers for ±1% accuracy.
Tolerances of Seamless Carbon Steel Tube
| Pipe types | Pipe sizes(mm) | Tolerances |
| Hot rolled | OD<50 |
±0.50mm |
| 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% |
Chemical Composition of CS SMLS Pipe
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Standard |
Grade |
Chemical Components (%) |
Mechanical Properties |
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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 |
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ASTM A106 |
A |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥415 |
≥240 |
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B |
≤0.35 |
≥0.10 |
0.29-1.06 |
≤0.035 |
≤0.035 |
≥485 |
≥275 |
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ASTM A179 |
A179 |
0.06-0.18 |
- |
0.27-0.63 |
≤0.035 |
≤0.035 |
≥325 |
≥180 |
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ASTM A192 |
A192 |
0.06-0.18 |
≤0.25 |
0.27-0.63 |
≤0.035 |
≤0.035 |
≥325 |
≥180 |
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API 5L PSL1 |
A |
0.22 |
- |
0.9 |
0.03 |
0.03 |
≥331 |
≥207 |
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B |
0.28 |
- |
1.2 |
0.03 |
0.03 |
≥414 |
≥241 |
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X42 |
0.28 |
- |
1.3 |
0.03 |
0.03 |
≥414 |
≥290 |
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X46 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥434 |
≥317 |
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X52 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥455 |
≥359 |
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X56 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥490 |
≥386 |
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X60 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥517 |
≥448 |
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X65 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥531 |
≥448 |
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X70 |
0.28 |
- |
1.4 |
0.03 |
0.03 |
≥565 |
≥483 |
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API 5L PSL2 |
B |
0.24 |
- |
1.2 |
0.025 |
0.015 |
≥414 |
≥241 |
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X42 |
0.24 |
- |
1.3 |
0.025 |
0.015 |
≥414 |
≥290 |
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X46 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥434 |
≥317 |
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X52 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥455 |
≥359 |
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X56 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥490 |
≥386 |
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X60 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥517 |
≥414 |
|
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X65 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥531 |
≥448 |
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X70 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥565 |
≥483 |
|
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X80 |
0.24 |
- |
1.4 |
0.025 |
0.015 |
≥621 |
≥552 |
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