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Help CenterGB/T 5310 Seamless Steel Tube for High Pressure Boiler China National Standard – Carbon & Alloy Steel – Up to 650°C Service
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GB/T 5310 Seamless Steel Tube for High Pressure Boiler
China National Standard – Carbon & Alloy Steel – Up to 650°C Service
Product Overview
Our GB/T 5310 seamless steel tubes are manufactured to the latest GB/T 5310-2023 standard for high pressure boiler service. These tubes are specifically designed for power plant boilers, superheaters, reheaters, economizers, and high pressure steam pipelines operating at temperatures up to 650°C and pressures above 9.8 MPa.
Available Grades: 20G, 25MnG, 15MoG, 20MoG, 15CrMoG, 12Cr1MoVG, 12Cr2MoG, 12Cr2MoWVTiB, 12Cr3MoVSiTiB, and other special grades
✅ Latest standard – GB/T 5310-2023 (effective April 1, 2024)
✅ Seamless construction – No weld seam – zero leak risk
✅ High temperature & pressure – Designed for >9.8 MPa, up to 650°C
✅ 100% non-destructive tested – UT, eddy current, or hydrostatic
✅ Full traceability – MTC with heat number provided
✅ Factory direct | Stock available | Fast delivery
Key Specifications
| Parameter | Details |
|---|---|
| Standard | GB/T 5310-2023 (replaces GB/T 5310-2017) |
| Type | Seamless – Hot rolled or Cold drawn |
| Material | Carbon steel & Alloy steel (Cr-Mo, Cr-Mo-V series) |
| Grades | 20G, 25MnG, 15MoG, 20MoG, 15CrMoG, 12Cr1MoVG, 12Cr2MoG, 12Cr2MoWVTiB, 12Cr3MoVSiTiB |
| OD Range (Hot rolled) | 22mm – 530mm |
| OD Range (Cold drawn) | 10mm – 108mm |
| Wall Thickness | 2.0mm – 70mm |
| Length | 4m – 12m (fixed or random) |
| Surface Finish | Black / Bare / Oiled |
| End Finish | Plain / Beveled / Threaded |
📌 Standard update note: GB/T 5310-2023 is the current version. The previous version GB/T 5310-2017 was replaced on April 1, 2024 .
Available Grades & Applications
| Grade | Material Type | Max Temp | Typical Application |
|---|---|---|---|
| 20G | Carbon steel | 450°C | Most popular – General high pressure boiler |
| 25MnG | Carbon steel (higher Mn) | 450°C | Higher strength carbon steel |
| 15MoG | Molybdenum alloy | 500°C | Medium temperature service |
| 20MoG | Molybdenum alloy | 500°C | Higher strength Mo-alloy |
| 15CrMoG | 1Cr-0.5Mo alloy | 550°C | High temperature boiler tubes |
| 12Cr1MoVG | 1Cr-1Mo-V alloy | 580°C | Superheater & reheater tubes |
| 12Cr2MoG | 2.25Cr-1Mo alloy | 550°C | High pressure vessels |
| 12Cr2MoWVTiB | Cr-Mo-W-V-Ti-B | 600°C | Ultra-supercritical (steel 102) |
| 12Cr3MoVSiTiB | Cr-Mo-V-Si-Ti-B | 620°C | High efficiency supercritical (steel 106) |
Chemical Composition – GB/T 5310 Grades
| Grade | C | Si | Mn | Cr | Mo | V | Others |
|---|---|---|---|---|---|---|---|
| 20G | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | — | — | — | — |
| 25MnG | 0.22-0.30 | 0.17-0.37 | 0.70-1.00 | — | — | — | — |
| 15MoG | 0.12-0.20 | 0.17-0.37 | 0.40-0.80 | — | 0.25-0.35 | — | — |
| 15CrMoG | 0.12-0.18 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.40-0.55 | — | — |
| 12Cr1MoVG | 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | 0.90-1.20 | 0.25-0.35 | 0.15-0.30 | — |
| 12Cr2MoG | 0.08-0.15 | ≤0.50 | 0.40-0.70 | 2.00-2.50 | 0.90-1.20 | — | — |
| 12Cr2MoWVTiB | 0.08-0.15 | 0.45-0.75 | 0.45-0.65 | 1.60-2.10 | 0.50-0.65 | 0.28-0.42 | W 0.30-0.55, Ti, B |
| 12Cr3MoVSiTiB | 0.09-0.15 | 0.50-1.00 | 0.50-0.80 | 2.50-3.00 | 0.90-1.10 | 0.25-0.40 | Ti, B |
Mechanical Properties – GB/T 5310 Grades
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20G | 410-550 | ≥245 | ≥24 |
| 25MnG | ≥415 | ≥240 | ≥22 |
| 15MoG | 450-600 | ≥270 | ≥22 |
| 15CrMoG | 440-640 | ≥235 | ≥21 |
| 12Cr1MoVG | 470-640 | ≥255 | ≥21 |
| 12Cr2MoG | 450-600 | ≥280 | ≥20 |
Key Advantages
| Feature | Benefit |
|---|---|
| Latest standard compliance | GB/T 5310-2023 – meets current Chinese boiler code |
| Seamless construction | No weld seam – guaranteed safety for high pressure |
| Multiple grade options | Carbon to advanced Cr-Mo-V grades |
| High temperature strength | Excellent creep resistance up to 650°C |
| 100% NDT tested | UT, eddy current, or hydrostatic |
| Full traceability | MTC with heat number – EN 10204 3.1 equivalent |
| Supercritical grades available | 12Cr2MoWVTiB (Steel 102), 12Cr3MoVSiTiB (Steel 106) |
Applications
| Industry | Application | Recommended Grade |
|---|---|---|
| Power Generation | Superheater tubes | 12Cr1MoVG |
| Power Generation | Reheater tubes | 15CrMoG, 12Cr1MoVG |
| Power Generation | Economizer tubes | 20G |
| Power Generation | Water wall tubes | 20G |
| Industrial Boilers | High pressure steam boilers | 20G |
| Nuclear Power | Conventional island piping | 20G, 15CrMoG |
| Ultra-Supercritical | 600-620°C service | 12Cr2MoWVTiB, 12Cr3MoVSiTiB |
Available Sizes & Wall Thicknesses
| Manufacturing Method | OD Range (mm) | WT Range (mm) | Typical Grades |
|---|---|---|---|
| Hot rolled | 22 – 530 | 2.0 – 70 | 20G, 15CrMoG, 12Cr1MoVG |
| Cold drawn (precision) | 10 – 108 | 2.0 – 13.0 | 20G, 12Cr1MoVG |
| Cold rolled | 10 – 76 | 1.5 – 10.0 | All grades |
Quality Testing & Inspection
| Test | Standard / Method | Coverage |
|---|---|---|
| Ultrasonic Testing (UT) | GB/T 5777 | 100% |
| Eddy Current Testing (ET) | GB/T 7735 | 100% (optional) |
| Hydrostatic Test | GB/T 5310 | 100% |
| Tensile Test | GB/T 228.1 | Per batch |
| Impact Test (Charpy V-notch) | GB/T 229 | Per batch (alloy grades) |
| Hardness Test | GB/T 231.1 | Per batch |
| Flattening Test | GB/T 246 | Per batch |
| Flaring Test | GB/T 242 | Per batch |
| Metallographic Examination | GB/T 13298 | Per batch |
| Dimensional Inspection | Micrometer / Caliper | 100% |
Endorsed by the Standardization Administration of China.
Mill Test Certificate
Chinese standard MTC – Equivalent to EN 10204 Type 3.1
Third-party inspection – Available upon request (SGS, BV, TUV)
Full traceability from melt to finished tube
Heat analysis report for each batch
Processing Services (Available)
| Service | Description |
|---|---|
| Cutting | Precision cutting to exact length |
| Beveling | For welding preparation (30°-37.5°) |
| Threading | NPT, BSP, or custom threads |
| Bending | Cold or hot bending |
| Heat treatment | Normalizing, annealing, stress relieving |
| Surface treatment | Oiling, painting, galvanizing |
Packaging & Shipping
| Item | Details |
|---|---|
| Packaging | Hexagonal or square bundles |
| Protection | Anti-rust oil + plastic end caps |
| Marking | Stencil / spray with grade, size, heat number, standard |
| Lead time | 7–15 days (stock: 20G), 20–30 days (alloy grades) |
| Port | Tianjin / Shanghai / Guangzhou |
Why Choose Our GB/T 5310 High Pressure Boiler Tubes?
| Advantage | Description |
|---|---|
| Latest Standard | GB/T 5310-2023 compliant |
| Boiler Tube Specialist | Dedicated production line for boiler applications |
| Full Range of Grades | 20G to advanced supercritical grades |
| In-House Testing | UT, hydrostatic, impact, metallographic |
| Full Traceability | MTC with heat number for every batch |
| Stock Availability | 20G most popular sizes ready to ship |
| Global Export | Shipped to power plants worldwide |
| Competitive Pricing | Factory direct – no middlemen |
Grade Selection Guide by Operating Temperature
| Operating Temp | Pressure | Recommended Grade | International Equivalent |
|---|---|---|---|
| ≤450°C | High | 20G | ASTM A106 Gr.B / P235GH |
| ≤500°C | High | 15MoG / 20MoG | ASTM A209 T1 / 16Mo3 |
| ≤550°C | High | 15CrMoG | ASTM A213 T12 / 13CrMo4-5 |
| ≤580°C | Very High | 12Cr1MoVG | ASTM A213 T22 (modified) |
| ≤600°C | Ultra-High | 12Cr2MoWVTiB | Steel 102 (unique) |
| ≤620°C | Ultra-High | 12Cr3MoVSiTiB | Steel 106 (unique) |
International Standard Cross-Reference
| GB/T 5310 Grade | ASTM Equivalent | EN Equivalent | DIN Equivalent |
|---|---|---|---|
| 20G | A106 Gr.B | P235GH | St35.8 |
| 25MnG | A106 Gr.C | P265GH | St45.8 |
| 15MoG | A209 T1 | 16Mo3 | 15Mo3 |
| 15CrMoG | A213 T12 | 13CrMo4-5 | 13CrMo44 |
| 12Cr1MoVG | — (similar to T22) | — | — |
| 12Cr2MoG | A213 T22 | 10CrMo9-10 | 10CrMo910 |
Contact for Quote
Please provide the following details:
Grade : 20G / 25MnG / 15MoG / 15CrMoG / 12Cr1MoVG / 12Cr2MoG
OD (mm) : _______
WT (mm) : _______
Length (m) : _______
Quantity : _______ (m / tons / pieces)
End Finish : Plain / Beveled / Threaded
Inspection : Standard / Third-party
📧 Email: yjhtrade@gmail.com
📞 WhatsApp: +86 15106174543
🌐 Website:
Reply within 24 hours.
FAQ
Q1: What is the difference between GB/T 5310-2023 and GB/T 5310-2017?
A: GB/T 5310-2023 is the current standard (effective April 1, 2024) and replaces the 2017 version. It includes updates to technical requirements and new grades for ultra-supercritical applications .
Q2: Which grade is most commonly used for high pressure boilers?
A: 20G is the most popular carbon steel grade for general high pressure boiler service up to 450°C.
Q3: What is 12Cr1MoVG used for?
A: 12Cr1MoVG is a Cr-Mo-V alloy steel used for superheater and reheater tubes in high efficiency power plants up to 580°C .
Q4: Does GB/T 5310 require impact testing?
A: Yes. All alloy grades require Charpy V-notch impact testing. Carbon grades may require impact testing depending on application.
Q5: Are GB/T 5310 tubes accepted for international projects?
A: Yes. GB/T 5310 is widely recognized internationally. We can provide cross-reference to ASTM or EN equivalents.
Q6: Can you provide third-party inspection?
A: Yes. SGS, BV, TUV, or any customer-specified agency.
Q7: What is the maximum operating temperature for supercritical grades?
A: 12Cr3MoVSiTiB (Steel 106) is designed for service up to 620°C for ultra-supercritical power plants .
Q8: Do you offer free samples?
A: 30cm sample of 20G available. Alloy grade samples available with lead time.
Related Products
GB/T 3087 – Low & medium pressure boiler tube
GB/T 8163 – Seamless steel tube for fluid transport
ASTM A192 – High pressure boiler tube (US standard)
ASTM A213 – Alloy steel boiler tube
EN 10216-2 – European pressure tube standard
Tags: GB/T 5310 High Pressure Boiler Tube 20G Boiler Tube 12Cr1MoVG Seamless Boiler Tube China Standard Boiler Tube
Quick Reference: Grade Selection Table
| Your Need | Temperature | Recommended Grade | Cost Level |
|---|---|---|---|
| General boiler / economizer | ≤450°C | 20G | $ |
| Higher strength boiler | ≤450°C | 25MnG | $ |
| Medium temp superheater | ≤500°C | 15MoG | $$ |
| High temp superheater | ≤550°C | 15CrMoG | $$ |
| High temp reheater | ≤580°C | 12Cr1MoVG | $$$ |
| High pressure vessels | ≤550°C | 12Cr2MoG | $$$ |
| Ultra-supercritical | ≤600°C | 12Cr2MoWVTiB | $$$$ |
| Advanced ultra-supercritical | ≤620°C | 12Cr3MoVSiTiB | $$$$$ |
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