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Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
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In this column you can find the steel pipe related articles you need, including industry trends, product standards and materials, and some technical guidelines.
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Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
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Many years of large-scale project experience in various fields（Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical etc.）, professional project team is responsible from receiving until the end of the project.
ISO 3183 Standard is a technical standard published by the International Organization for Standardization (ISO) for steel pipes used in pipeline transportation systems for the oil and gas industry.
This standard specifies the manufacturing requirements, chemical composition, mechanical properties, test methods, and quality system for seamless steel pipes (SMLS) and welded steel pipes (ERW, HFW, LSAW, SSAW).
The standard is divided into two product specification levels:
PSL 1 (Product Specification Level 1): General service level with broader requirements.
PSL 2 (Product Specification Level 2): High-end service level, suitable for more demanding operating conditions, such as high pressure, high temperature, and acidic environments.
|
Standard |
ISO 3183 |
|
Procedure |
ERW/HFW, SMLS, SSAW, LSAW |
|
Dimensions |
10.3mm – 2134mm |
|
1/8″ – 84″ |
|
|
DN6 – DN400 |
|
|
Thickness |
1.7mm – 52mm |
|
SCH 5S, SCH10, SCH20, SCH30, SCH40, STD, XXS, SCH60, SCH100, SCH120, SCH140, SCH1 |
|
|
Unit Length |
3 – 18 mtrs |
|
Steel Grade |
Gr. A, X56, X90, Gr. B, X60, X100, X42, X65, X120, X46, X70, X52, X80 |
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Surface Coating |
Black lacquer coating, Varnishing, Oiling, Hot Dip Galvanizing |
|
FBE, 2PP, 3PP, 2PE, 3PE |
|
|
End Type |
Plain, Bevelled, Threaded, Grooved，Shouldered |
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Joint Method |
Fitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding |
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Pipe Machining |
Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding |
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ISO 3183 Pipe Size: Permissible Specified Outside Diameter and Specified Wall Thickness |
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|
Specified Outside Diameter |
Specified Wall Thickness |
|
|
Special Light Sizes a |
Regular Sizes |
|
|
≥ 10.3 (0.405) to < 13.7 (0.540) |
— |
≥ 1.7 (0.068) to ≤ 2.4 (0.094) |
|
≥ 13.7 (0.540) to < 17.1 (0.675) |
— |
≥ 2.2 (0.088) to ≤ 3.0 (0.118) |
|
≥ 17.1 (0.675) to < 21.3 (0.840) |
— |
≥ 2.3 (0.091) to ≤ 3.2 (0.125) |
|
≥ 21.3 (0.840) to < 26.7 (1.050) |
— |
≥ 2.1 (0.083) to ≤ 7.5 (0.294) |
|
≥ 26.7 (1.050) to < 33.4 (1.315) |
— |
≥ 2.1 (0.083) to ≤ 7.8 (0.308) |
|
≥ 33.4 (1.315) to < 48.3 (1.900) |
— |
≥ 2.1 (0.083) to ≤ 10.0 (0.394) |
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≥ 48.3 (1.900) to < 60.3 (2.375) |
— |
≥ 2.1 (0.083) to ≤ 12.5 (0.492) |
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≥ 60.3 (2.375) to < 73.0 (2.875) |
≥ 2.1 (0.083) to ≤ 3.6 (0.141) |
> 3.6 (0.141) to ≤ 14.2 (0.559) |
|
≥ 73.0 (2.875) to < 88.9 (3.500) |
≥ 2.1 (0.083) to ≤ 3.6 (0.141) |
> 3.6 (0.141) to ≤ 20.0 (0.787) |
|
≥ 88.9 (3.500) to < 101.6 (4.000) |
≥ 2.1 (0.083) to ≤ 4.0 (0.156) |
> 4.0 (0.156) to ≤ 22.0 (0.866) |
|
≥ 101.6 (4.000) to < 168.3 (6.625) |
≥ 2.1 (0.083) to ≤ 4.0 (0.156) |
> 4.0 (0.156) to ≤ 25.0 (0.984) |
|
≥ 168.3 (6.625) to < 219.1 (8.625) |
≥ 2.1 (0.083) to ≤ 4.0 (0.156) |
> 4.0 (0.156) to ≤ 40.0 (1.575) |
|
≥ 219.1 (8.625) to < 273.1 (10.750) |
≥ 3.2 (0.125) to ≤ 4.0 (0.156) |
> 4.0 (0.156) to ≤ 40.0 (1.575) |
|
≥ 273.1 (10.750) to < 323.9 (12.750) |
≥ 3.6 (0.141) to ≤ 5.2 (0.203) |
> 5.2 (0.203) to ≤ 45.0 (1.771) |
|
≥ 323.9 (12.750) to < 355.6 (14.000) |
≥ 4.0 (0.156) to ≤ 5.6 (0.219) |
> 5.6 (0.219) to ≤ 45.0 (1.771) |
|
≥ 355.6 (14.000) to < 457 (18.000) |
≥ 4.5 (0.177) to ≤ 7.1 (0.281) |
> 7.1 (0.281) to ≤ 45.0 (1.771) |
|
≥ 457 (18.000) to < 559 (22.000) |
≥ 4.8 (0.188) to ≤ 7.1 (0.281) |
> 7.1 (0.281) to ≤ 45.0 (1.771) |
|
≥ 559 (22.000) to < 711 (28.000) |
≥ 5.6 (0.219) to ≤ 7.1 (0.281) |
> 7.1 (0.281) to ≤ 45.0 (1.771) |
|
≥ 711 (28.000) to < 864 (34.000) |
≥ 5.6 (0.219) to ≤ 7.1 (0.281) |
> 7.1 (0.281) to ≤ 52.0 (2.050) |
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≥ 864 (34.000) to < 965 (38.000) |
— |
≥ 5.6 (0.219) to ≤ 52.0 (2.050) |
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≥ 965 (38.000) to < 1422 (56.000) |
— |
≥ 6.4 (0.250) to ≤ 52.0 (2.050) |
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≥ 1422 (56.000) to < 1829 (72.000) |
— |
≥ 9.5 (0.375) to ≤ 52.0 (2.050) |
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≥ 1829 (72.000) to < 2134 (84.000) |
— |
≥ 10.3 (0.406) to ≤ 52.0 (2.050) |
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NOTE: Standardized values for specified outside diameter and specified wall thickness of pipe are given in ISO 4200 [7] and ASME B36.10M[8] |
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a. Pipe having the combination of specified outside diameter and specified wall thickness is defined as special light size pipe; other combinations given in this table are defined as regular size pipe. |
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Chemical Composition For Pipe With t≤25 mm（0.984in） |
|||||||||||
|
Steel Grade |
Mass Fraction，based
upon heat and product analyses |
Carbon Equivalent |
|||||||||
|
– |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
Other |
CEIIW |
CEPcm |
|
Seamless and welded pipe |
|||||||||||
|
L245NE or BNE |
0.18 |
0.4 |
1.2 |
0.025 |
0.015 |
– |
– |
– |
– |
0.42 |
0.25 |
|
L290NE or X42NE |
0.19 |
0.4 |
1.2 |
0.025 |
0.015 |
0.06 |
0.05 |
0.04 |
– |
0.42 |
0.25 |
|
L360NE or X52NE |
0.22 |
0.45 |
1.4 |
0.025 |
0.015 |
0.1 |
0.05 |
0.04 |
– |
0.43 |
0.25 |
|
L415NE or X60NE |
0.23 |
0.45 |
1.4 |
0.025 |
0.015 |
0.1 |
0.05 |
0.04 |
– |
As agreed |
As agreed |
|
Seamless pipe |
|||||||||||
|
L360QE or X52QE |
0.18 |
0.45 |
1.5 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
– |
0.42 |
0.25 |
|
L415QE or X60QE |
0.18 |
0.45 |
1.7 |
0.025 |
0.015 |
0.09 |
0.06 |
0.05 |
– |
0.43 |
0.25 |
|
L450QE or X65QE |
0.18 |
0.45 |
1.7 |
0.025 |
0.015 |
0.1 |
0.06 |
0.07 |
– |
0.43 |
0.25 |
|
L485QE or X70QE |
0.18 |
0.45 |
1.8 |
0.025 |
0.015 |
0.11 |
0.06 |
0.07 |
– |
0.43 |
0.25 |
|
L555QE or X80QE |
0.18 |
0.45 |
1.9 |
0.025 |
0.015 |
0.11 |
0.07 |
0.07 |
– |
As agreed |
As agreed |
|
Steel Grade |
Pipe body of SMLS and welded pipes |
Weld seam of HFW，SAW and COW pipes |
|||||
|
Yield Strength |
Tensile Strength |
Ratio |
Elongation |
Tensile Strength |
|||
|
min |
max |
min |
max |
max |
min |
min |
|
|
L245NE or BNE |
245 |
440 |
415 |
655 |
0.8 |
22 |
415 |
|
L245ME or BME |
245 |
440 |
415 |
655 |
0.85 |
22 |
415 |
|
L290NE or X42NE |
290 |
440 |
415 |
655 |
0.85 |
21 |
415 |
|
L360NE or X52NE |
360 |
510 |
460 |
760 |
0.85 |
20 |
460 |
|
L360QE or X52QE |
360 |
510 |
460 |
760 |
0.88 |
20 |
460 |
|
L415NE or X60NE |
415 |
565 |
520 |
760 |
0.85 |
18 |
520 |
|
L415QE or X60QE |
415 |
565 |
520 |
760 |
0.88 |
18 |
520 |
|
L450QE or X65QE |
450 |
570 |
535 |
760 |
0.9 |
18 |
535 |
|
L450ME or X65ME |
450 |
570 |
535 |
760 |
0.87 |
18 |
535 |
|
L485QE or X70QE |
485 |
605 |
570 |
760 |
0.9 |
18 |
570 |
|
L555QE or X80QE |
555 |
675 |
625 |
825 |
0.9 |
18 |
625 |
For seamless pipes, PSL2 grade requires continuous casting or rolling, followed by piercing, hot rolling/cold drawing processes.
The sulfur and phosphorus contents in the chemical composition must not exceed 0.015% and 0.025%, respectively.
The corresponding carbon equivalent (CEIIW) ≤ 0.43%, and cold crack susceptibility index (Pcm) ≤ 0.25.
The standard specifically emphasizes the control of susceptibility to HIC (hydrogen-induced cracking) and SSC (sulfide stress corrosion cracking), requiring a crack susceptibility rate (CSR) of less than 2% as tested by NACETM0284 standard.
Depending on the steel grade, the yield strength of seamless pipes must meet clearly defined gradient requirements. Taking L245M (equivalent to L245 in GB/T9711) as an example, its minimum yield strength is 245 MPa, tensile strength is 415-760 MPa, and elongation is ≥20%. For high-grade steel pipes such as X80, the standard stipulates that a Charpy impact test at -20℃ is required, with each specimen absorbing no less than 40 J of energy.
Outer diameter tolerances are divided into ordinary grade (±0.75%) and high-precision grade (±0.5%), and wall thickness tolerances are dynamically adjusted according to the D/t ratio.
For example, when D/t ≤ 20, the wall thickness tolerance is 15%/-12.5%. This stringent dimensional control ensures the assembly accuracy of the pipe circumferential weld and reduces the risk of stress concentration.
Unlike general steel pipe standards, ISO 3183 specifies several specialized tests for the special operating conditions of oil and gas transportation:
For PSL2 seamless steel pipes, no cracks should appear when flattened to a distance of 2/3 of the outer diameter of the pipe.
Verifies the plastic deformation capacity of the steel pipe substrate and weld.
Includes a 96-hour salt spray test and a HIC immersion test, requiring a crack length ratio (CLR) ≤ 15% for the sample section.
100% ultrasonic testing (UT) for longitudinal defects, and eddy current testing (ET) or magnetic flux leakage testing (MFL) for transverse defect screening.
ISO 3183 adopts a dual quality management mechanism of manufacturer qualification certification + production process control. Manufacturers should possess the following quality system:
1. Raw material incoming inspection records (including spectral analysis reports).
2. Archived heat treatment process curves (normalizing temperature deviation must be controlled within ±20°C).
3. Calibration certificates for online automatic testing equipment (UT equipment calibrated weekly).
4. Third-party supervision and inspection reports (such as factory audits by DNV GL or TÜV).
Compared to ASTM A106 (Carbon steel seamless pipes for high-temperature applications) or EN 10216 (Seamless steel pipes for pressure applications), ISO 3183 has distinct features in the following aspects:
Added requirement for -60°C low-temperature impact in Arctic regions.
Specifies the 85% shear area threshold for DWTT (Drop Weight Tear Test).
Carbon equivalent CEI ≤ 0.43%, cold crack sensitivity coefficient Pcm ≤ 0.25.
Requires each steel pipe to be laser-engraved with information including standard number, steel grade, furnace number, and dimensions.
PSL2 is more stringent than PSL1 in terms of chemical composition, impact performance, non-destructive testing, and document traceability, making it suitable for high-risk transportation scenarios.
The two standards are highly consistent. API 5L is essentially equivalent to the ISO 3183 standard and is commonly used in oil and gas pipeline projects in North America.
E-mail: sales@eastern-steels.com
