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Help CenterSteel Pipe & Tube & High Pressure Boiler Tube，20G / 20MnG、15CrMoG / 12CrMoVG、P11/P22 / T11/T22、P91/T91、P92/T92
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1. Product Overview
High-pressure boiler tubes are special seamless pressure-bearing steel pipes manufactured strictly according to GB/T 5310 standard. They are designed for high-temperature and high-pressure working conditions in thermal power plants, supercritical power units, nuclear power systems and petrochemical high-temperature equipment.
The tubes can continuously withstand steam temperature from 450℃ to 620℃ and working pressure above 9.8 MPa. Featuring high-temperature creep resistance, high tensile strength, structural stability, oxidation resistance and fatigue resistance, they are essential safety-grade pipes for high-temperature industrial systems.
2. Main Steel Grades & Working Temperature
20G / 20MnG: Max long-term service temperature ≤450℃, used for economizers, water walls, low-temperature superheaters and general high-pressure steam pipelines.
15CrMoG / 12Cr1MoVG: Working temperature 520℃–580℃, applied for high-temperature superheaters, reheaters, headers and petrochemical furnace tubes.
P11 / P22 / T11 / T22: 550℃–590℃, widely used in supercritical power units and high-temperature heat exchange systems.
P91 / T91 / P92 / T92: Max service temperature up to 620℃, suitable for ultra-supercritical power plants and nuclear power high-temperature main pipelines.
3. Executive Standards
GB/T 5310-2017 (Chinese standard for high-pressure boiler tubes)
ASME SA213 / SA335
EN 10216-2 / DIN 17175
4. Specifications
Outer Diameter: 12mm–711mmWall Thickness: 2.0mm–120mmLength: Standard 6m/9m/12m, customized 3–18m availableProcess: Hot rolled / Cold drawn seamlessPipe end: Plain end / Beveled end
5. Production Process
Raw material inspection → Furnace heating → Piercing → Hot rolling / Cold drawing → Straightening → Normalizing + Tempering heat treatment → 100% UT inspection → Hydrostatic pressure test → Dimension inspection → Marking & Anti-rust packaging
Heat treatment ensures uniform metallographic structure, eliminates internal stress and guarantees no creep deformation under long-term high temperature.
6. Product Advantages
High-temperature strength, no softening or deformation under continuous high heat
Excellent anti-creep performance for supercritical long-cycle operation
Uniform wall thickness and smooth inner wall for stable pressure bearing
Strong oxidation and steam corrosion resistance for long service life
100% full inspection and hydrostatic test for maximum safety
Stable weldability, low construction failure rate
7. Applications
Thermal power plants, supercritical & ultra-supercritical generating units, nuclear power auxiliary pipelines, petrochemical hydrogenation units, high-temperature furnaces, waste heat recovery systems and high-pressure steam pipe networks.
8. Quality Inspection & Certification
Full factory tests including chemical analysis, tensile test, impact test, hardness test, flattening test, ultrasonic NDT and hydrostatic test.MTC 3.1 / 3.2 certificates, heat treatment reports and NDT reports are available. SGS, BV third-party inspection is acceptable.
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