GB/T14164-2013 5L PSL1 L290(X42) Pipeline Steel Coil
GB/T14164-2013 5L PSL1 L290(X42) Pipeline Steel Coil - Properties and Equivalents
Comprehensive material data for GB/T14164-2013 L290 (X42) PSL1 pipeline steel coil including chemistry, mechanics, thermal properties, and equivalent grades.
Hot rolling, Thermo-mechanically controlled processing (TMCP), normalizing rolling; subsequent cold forming, welding (SAW, ERW, HFW), pipe expansion
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GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Introduction
L290 (X42) PSL1 pipeline steel according to GB/T14164-2013 is a micro-alloyed low carbon steel intended for welded and seamless pipes in petroleum and natural gas transmission systems. The grade designation L290 indicates a minimum specified yield strength of 290 MPa in transverse testing, with X42 expressing the approximate strength in ksi (42 ksi). This material is supplied in coil form for efficient spiral or longitudinal pipe manufacturing. It features good weldability from controlled chemistry (carbon equivalent limits), adequate toughness for moderate conditions, and balanced strength-ductility for cold forming and pipe expansion. The PSL1 classification provides basic requirements suitable for standard pressure applications, while the TMCP or normalized rolling delivers homogeneous microstructure and consistent mechanical properties across the coil length.
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Chemical Composition
The chemical composition complies with GB/T14164-2013 Table 6 for PSL 1 pipe. Limits apply to both seamless and welded pipes. Microalloying elements V, Nb, Ti are used for grain refinement and precipitation strengthening; their sum shall not exceed 0.15% when any of the three is intentionally added. Carbon equivalent CE(IIW) is a mandatory acceptance requirement for welded pipe to ensure field weldability.
| Element | Standard Value (max %) | Remarks |
|---|---|---|
| C | 0.22 | Applicable to seamless and welded pipe |
| Mn | 1.20 | |
| P | 0.025 | |
| S | 0.015 | |
| V | ≤0.05 | If added individually; sum of V+Nb+Ti ≤ 0.15% |
| Nb | ≤0.05 | If added individually; sum of V+Nb+Ti ≤ 0.15% |
| Ti | ≤0.04 | If added individually; sum of V+Nb+Ti ≤ 0.15% |
| CE(IIW) | 0.43 | For welded pipe, CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Thermal and Electrical Physical Properties
The following values are typical for low carbon micro-alloyed steels of this strength level and can be used for design calculations. They are not specification requirements but represent realistic engineering data for density, elastic moduli, thermal and electrical characteristics.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | At 20 °C |
| Modulus of Elasticity (E) | 207 | GPa | At 20 °C |
| Shear Modulus (G) | 80 | GPa | At 20 °C |
| Poisson's ratio (ν) | 0.30 | — | |
| Thermal expansion coefficient (α) | 12.0 | 10⁻⁶ / K | 20 – 100 °C |
| Thermal conductivity (λ) | 45 | W/(m·K) | At 20 °C |
| Specific heat capacity | 460 | J/(kg·K) | At 20 °C |
| Electrical resistivity (ρe) | 0.14 | μΩ·m | At 20 °C |
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Mechanical Properties
Tensile and bend testing per GB/T14164-2013 for PSL1 pipe. Elongation is calculated using standard formula based on test specimen cross-sectional area and actual tensile strength. Impact testing is performed only when specified in purchase order; when required, minimum absorbed energy is 27 J at 0°C on transverse specimens. Bend test uses a mandrel diameter of 4 times the wall thickness (4T) with 180° bending angle.
| Property | Standard Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | 290 – 495 | MPa | Transverse strip specimen or round bar, 0.5% total extension (Rt0.5) may also be used |
| Tensile Strength (Rm) | ≥ 415 | MPa | Transverse strip specimen or round bar |
| Elongation after fracture (A) | e = 1940 · Aₓ⁰·² / U⁰·⁹ * | % | Gauge length 50 mm, transverse or longitudinal; Aₓ = specimen cross-sectional area (mm²), U = actual tensile strength (MPa) |
| Bend Test | 4T mandrel, 180° | — | No cracks or ruptures on specimen surface |
| Impact absorbed energy (KV₂) | ≥ 27 (when required) | J | 0 °C, transverse 10×10×55 mm specimen, or subsize as applicable; by agreement |
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Identical Equivalent Material Standards and Replaceable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International / USA | API 5L | X42 PSL1 | Direct equivalent; same yield and tensile requirements |
| International | ISO 3183 | L290 PSL1 | Technically identical; may be used interchangeably |
| China | GB/T 9711 | L290 PSL1 | Previous Chinese standard for line pipe (now superseded by GB/T14164) |
| Russia / CIS | GOST R 52079 | К42 (K42) | Equivalent strength level |
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Application Introduction
L290 (X42) PSL1 steel coil is the workhorse material for the oil and gas transportation pipeline industry. Its balanced properties allow economical manufacturing of large-diameter pipes by spiral or longitudinal welding, as well as smaller ERW pipes. The PSL1 level is commonly specified for medium-pressure onshore pipelines, flow lines, and structural applications where stringent toughness is not the primary requirement.
Product Applications: Spiral submerged arc welded (SSAW) pipes (up to 60 inches diameter), Longitudinal submerged arc welded (LSAW/JCOE) pipes, Electric resistance welded (ERW/HFW) line pipes (smaller diameters), Coated and lined pipes for corrosion protection, Pipe spools and induction bends
Processed into products: Line pipe segments for mainline and feeder pipelines, Flow lines and gathering lines from wellheads, Pipe elbows (hot induction bends) and tees (welded), Reducer fittings and nipples manufactured from pipe, Pipe-based structural members, piling, and casings
Application industries: Oil and gas transmission and distribution, Water supply and sewage treatment, Slurry and tailings pipelines, Petrochemical and refining process piping, Construction and civil engineering (piling, structural bracing)
GB/T14164-2013 5L PSL1 L290 Pipeline Steel Coil Similar / Alternative Materials Recommendation
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| International | API 5L | X46 PSL1 | Next higher strength grade (min YS 320 MPa); similar weldability but slightly higher Mn |
| International | ISO 3183 | L320 PSL1 | Upgrade with 320 MPa minimum yield strength; used when higher pressure rating needed |
| China | GB/T14164 | L320 (X46) | Direct domestic upgrade; compatible manufacturing processes |
| International | API 5L | X42 PSL2 | Stricter chemistry (lower S, P, C) and mandatory impact toughness; suitable for more critical applications |
Notes:
The data above reflect mandatory requirements of GB/T14164-2013 for PSL 1 L290/X42 pipe. Actual values from a material test certificate may show narrower ranges. Elongation is calculated individually for each pipe lot based on geometry and achieved strength. For PSL2 orders, tighter chemical limits (P ≤0.020%, S ≤0.010%) and mandatory Charpy impact testing apply. When using this steel in welded structures, preheating and interpass temperature control may be recommended depending on thickness and carbon equivalent. Always refer to latest edition of referenced standards for current validity.
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