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Help CenterSteel Pipe & Tube & AHigh Pressure Boiler Tube，20G、20MnG、25MnG、SA210 A1/SA210 C、SA106 B/C
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1. Product Overview
High pressure boiler tubes are seamless pressure-bearing steel tubes made of carbon steel and low alloy steel. Specially designed for high-temperature and high-pressure heating surfaces of thermal power boilers and high-temperature fluid transportation, they comply with strict pressure standards of China, US and Europe. The tubes can stably operate under 450℃–650℃ and pressure above 9.8MPa for long term, with outstanding high-temperature creep resistance, pressure resistance and fatigue resistance. They are core safety components for thermal power plants and petrochemical equipment.
Application Scenarios
Water walls, economizers, superheaters, reheaters, headers and main steam pipelines of subcritical & supercritical power units; petrochemical cracking furnaces, hydrogenation heat exchangers; waste heat boilers, waste incineration boilers, high-pressure heating pipe networks and high-pressure chemical fertilizer process pipelines.
Delivery Lead Time
Standard spot sizes can be delivered within 5-7 days; customized products with extra thick wall, alloy grades or special lengths take 10-15 days. Full-container shipment from Tianjin Port.
2. Standards & Common Steel Grades
Domestic Standards
GB/T 5310 (For high pressure boiler), GB/T 3087 (Medium & low pressure boiler), GB/T 9948 (High temperature tubes for petroleum cracking)
International Standards
ASME SA210, ASME SA213, ASME SA335, EN 10216-2, DIN 17175
Common Grades (Carbon & Low Alloy Steel)
Carbon steel: 20G, 20MnG, 25MnG, SA210 A1/SA210 C, SA106 B/C
Cr-Mo alloy steel: 15CrMoG, 12Cr1MoVG, 12Cr2MoG; T11, T12, T22, T91, P11, P12, P22, P91
3. Specifications
Outer Diameter: Φ16mm–Φ480mm
Wall Thickness: 3mm–50mm
Standard Length: 6m, 9m, 12m, customized lengths available
Pipe End: Plain ends, beveled ends for welding
4. Manufacturing Process
Round billet heating → piercing, hot rolling / cold drawing → sizing & straightening → normalized + tempered heat treatment → surface grinding → non-destructive testing → hydrostatic test → marking & storage.Strict temperature control during heat treatment eliminates rolling stress, ensures uniform wall thickness without lamination or inner fold defects.
5. Key Mechanical Performance
High-temperature rupture strength: Resist creep deformation and burst under long-term high temperature service
High pressure burst resistance: Hydrostatic test pressure reaches 1.5 times of design working pressure, no leakage under pressure holding
Excellent weldability for field connection of headers and pipelines
Low-temperature impact toughness to avoid brittle cracking caused by temperature fluctuation during unit startup & shutdown
Anti-oxidation property to prevent inner wall scaling and pipeline blockage under high-temperature flue gas
6. Full Inspection 100% for Each Tube
Spectral chemical composition test for raw material
Mechanical tests: tensile, high-temperature impact and hardness test
Flattening & flaring forming tests
UT ultrasonic & ET eddy current NDT to detect internal & surface cracks, lamination
Hydrostatic tightness test for every single tube
Precision measurement of OD, wall thickness and dimensionFull set of documents provided: material test report, NDT report, hydrostatic test certificate and original quality guarantee certificate.
Quality Warranty
Full return and replacement guaranteed for unqualified products caused by manufacturing defects, material or dimensional errors.
7. Surface Treatment & Packing
Surface finish: Hot rolled black finish, annealed polished finish; oxide scale removed from inner & outer surface
Anti-rust treatment: Coated with special high-temperature anti-rust oil inside and outside
Packing: Plastic end caps for both ends, bundled by steel strips, wrapped with waterproof tarpaulin to avoid collision and rust during sea transportation in containers.
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