Corrosion-Resistant X90M Steel Sheet for Gas Pipeline Projects
GB/T 21237 Pipeline Steel Plates are made from high-strength low-alloy steel for oil and gas transmission. Our company supplies certified bulk orders.
- Excellent Weldability – Designed for ease of welding in pipeline construction with minimal preheat requirements.
- High Strength-to-Weight Ratio – Provides superior mechanical strength while reducing pipeline weight.
- Superior Toughness in Low Temperatures – Ensures reliable performance in arctic and cold environments.
- Good Corrosion Resistance – Suitable for sour service and offshore oil and gas transportation.
- Available in Multiple Grades and Thicknesses – Supports diverse project specifications and pipeline standards.
GB/T 21237 Pipe Steel Description
GB/T 21237 Pipeline Steel Plate is a high-performance product manufactured for oil and gas transmission lines under harsh environments. We are a trusted supplier and exporter of these steel plates, offering various grades, thicknesses, and widths to meet specific pipeline design standards. This pipeline steel delivers high yield strength, weldability, and low-temperature toughness, ensuring safe and efficient transport of fluids across long distances. Ideal for bulk supply to EPC contractors, pipeline fabricators, and oil & gas companies.
GB/T 21237 Pipe Steel Data Sheet
| GB/T 21237‑2018 / API 5L Equivalent Grade – Chemical Composition | ||||||
| GB/T Grade (API Grade) | PSL | C ≤ | Mn ≤ | P ≤ | S ≤ | Nb+V+Ti max¹ |
| L245 / B | PSL1 | 0.26 | 1.2 | 0.03 | 0.03 | – |
| L290 / X42 | PSL1 | 0.26 | 1.3 | 0.03 | 0.03 | – |
| L320 / X46 | PSL1 | 0.26 | 1.4 | 0.03 | 0.03 | – |
| L360 / X52 | PSL1 | 0.26 | 1.4 | 0.03 | 0.03 | – |
| L390 / X56 | PSL1 | 0.26 | 1.4 | 0.03 | 0.03 | – |
| L415 / X60 | PSL1 | 0.26 | 1.4 | 0.03 | 0.03 | – |
| L450 / X65 | PSL1 | 0.26 | 1.45 | 0.03 | 0.03 | – |
| L485 / X70 | PSL1 | 0.26 | 1.65 | 0.03 | 0.03 | – |
| L555 / X80 | PSL2 | 0.24 | 1.65 | 0.025 | 0.015 | ≤ 0.15 |
| L625 / X90 | PSL2 | 0.22 | ~1.65 | 0.025 | 0.015 | ≤ 0.15 |
| L690 / X100 | PSL2 | 0.22 | ~1.70 | 0.02 | 0.01 | ≤ 0.15 |
| L830 / X120 | PSL2 | 0.22 | ~1.75 | 0.02 | 0.01 | ≤ 0.15 |
| Mechanical Properties of GB/T 21237 Pipeline Steel Plate | ||||||
| Grade (API 5L) | PSL | Min Yield Strength (ReH) | Min Tensile Strength (Rm) | Elongation (A%) | Impact Energy (J) | Testing Temp (°C) |
| L245 / B | PSL1 | 245 | 400 – 550 | ≥ 23 | 27 | 0 |
| L290 / X42 | PSL1 | 290 | 430 – 580 | ≥ 22 | 27 | 0 |
| L320 / X46 | PSL1 | 320 | 460 – 610 | ≥ 21 | 27 | 0 |
| L360 / X52 | PSL1 | 360 | 490 – 640 | ≥ 20 | 27 | 0 |
| L390 / X56 | PSL1 | 390 | 515 – 665 | ≥ 19 | 27 | 0 |
| L415 / X60 | PSL1 | 415 | 535 – 685 | ≥ 18 | 27 | 0 |
| L450 / X65 | PSL1 | 450 | 560 – 710 | ≥ 17 | 27 | 0 |
| L485 / X70 | PSL1 | 485 | 585 – 735 | ≥ 16 | 27 | 0 |
| L555 / X80 | PSL2 | 555 | 620 – 780 | ≥ 15 | 34 | -20 |
| L625 / X90 | PSL2 | 625 | 670 – 820 | ≥ 14 | 34 | -20 |
| L690 / X100 | PSL2 | 690 | 710 – 870 | ≥ 13 | 34 | -20 |
| L830 / X120 | PSL2 | 830 | 770 – 930 | ≥ 12 | 34 | -20 |
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GB/T 21237 Pipeline Steel Plate Applications
- Long-Distance Oil and Gas Transmission Pipelines
Designed to withstand high pressure and environmental stresses, these steel plates are ideal for both onshore and offshore pipelines, ensuring safe and efficient fluid transport over long distances. - Sour Service and Corrosive Environments
Special PSL2 grades provide excellent resistance to hydrogen sulfide (H₂S) corrosion and sulfide stress cracking, making them suitable for sour gas fields and harsh chemical conditions. - Low-Temperature and Arctic Conditions
With superior toughness at sub-zero temperatures, these plates meet the strict requirements of cold region projects such as Arctic pipelines and high-altitude gas transport. - Urban Gas Distribution Networks
Lower grade plates are widely used in city gas pipelines and district heating systems, offering cost-effective solutions with easy weldability and reliable performance. - Structural and Engineering Applications
Beyond fluid transport, these steel plates also serve in structural supports for offshore platforms, bridges, and heavy engineering, leveraging their high strength and durability.
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FAQs
What grades are covered under GB/T 21237 and how do they relate to API 5L?
GB/T 21237 specifies Chinese pipeline steel grades equivalent to API 5L, covering PSL1 and PSL2 levels such as L245 to L830, designed for various pressure and environmental conditions.
Can GB/T 21237 steel plates be used in sour gas environments?
Yes, PSL2 grades under GB/T 21237 offer enhanced resistance to hydrogen-induced cracking and sulfide stress corrosion, making them suitable for sour service pipelines.
What are the common sizes and thickness ranges available for GB/T 21237 pipeline steel plates?
These plates are typically produced in thicknesses from 6mm up to 50mm and widths to meet project specifications, supporting both standard and custom orders.
