Boiler tube
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Made of high-quality alloy steel (20G, SA210A1, SA210C, 15CrMoG, 12Cr1MoVG, R102, etc.), with an operating temperature exceeding 600℃, pressure resistance ≥30MPa, and industry-leading oxidation and creep resistance, ensuring stable operation under long-term high temperature and high pressure.
Product name：
Martensitic precipitation hardening stainless steel
Material：
SUS631
Warehouse：
Tianjin
Surface treatment：
Polishing/Grinding/brushing/pickling/passivation/electroplating
Category：
Keyword：
Boiler tube
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Details description
Specifications and Standards
Specifications: GB5310-2008 "Seamless Steel Pipes for High-Pressure Boilers" stipulates that the outer diameter of hot-rolled pipes is 22-530mm, and the wall thickness varies from 20-70mm; the outer diameter of cold-drawn (cold-rolled) pipes is 10-108mm, and the wall thickness varies from 2.0-13.0mm.
Standards: Chinese national standards include GB3087, GB5310, etc.; American boiler and pressure vessel standards include ASME SA210, ASME SA213, etc.; German industrial standards include DIN17175, etc.
Precision Manufacturing Process
Pipe billets usually need to be peeled, mostly using oxygen cutting or sawing. The heating speed should be slightly slower, and the piercing temperature should be within a certain range. After rolling, the steel pipes should undergo normalizing and tempering heat treatment to improve the microstructure and properties. At the same time, the dimensional tolerances of the steel pipes are relatively strict.
Corrosion and Fatigue Resistance
Shot peening or aluminum coating on the inner wall significantly improves the resistance to water vapor oxidation and sulfide corrosion; fatigue life ≥100,000 cycles, suitable for frequent start-stop conditions.
Application Areas
Power Plant Boilers:
Supercritical/ultra-supercritical unit water wall tubes, main steam pipes, high-temperature superheater tubes.
Industrial Boilers:
High-pressure steam generators and waste heat boiler heat exchanger tube bundles in the chemical and papermaking industries.
Nuclear Power Equipment:
Heat transfer tubes of nuclear island steam generators, and pressure regulator supporting pipelines.
Pressure Vessels:
High-temperature pipelines of petrochemical reactors, and converter tubes of ammonia synthesis devices.
New Energy Fields:
Molten salt pipelines for concentrated solar power, and high-temperature resistant tubes for biomass boilers.
Technology and Quality Assurance
International Standard Certification:
Strictly follow standards such as ASME SA-213, GB 5310, and EN 10216, providing material chemical analysis, high-temperature creep strength test (1000h+), and metallographic reports.
Full Process Inspection:
Ultrasonic testing (UT), eddy current testing (ET), hydrostatic test (1.5 times working pressure), and hardness distribution test to ensure zero-defect delivery.
Customized Services:
Support for special materials (such as HR3C, Super304H), special-shaped bent pipes, and surface strengthening processes (inner wall coating/outer wall wear-resistant treatment).
Rapid Response Capability:
Strategic reserve of commonly used specifications Φ38mm-Φ159mm, emergency orders shipped within 72 hours, support for third-party supervision and export packaging.
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Seamless steel pipe manufacturing
3PE anti-corrosion pipe manufacturing
Spiral steel pipe manufacturing
Application fields
Petrochemicals
Petrochemicals
Aerospace
Aerospace
Energy equipment
Energy equipment
Oil/gas/water pipelines
Oil/gas/water pipelines
Building construction
Building construction
Dredging & piling works
Dredging & piling works
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