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Help CenterSteel Pipe & Tube & High Pressure Seamless Boiler Tube，20G、20MnG、25MnG、15CrMoG/12Cr1MoVG、P91/T91、P92/T92
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1. Product Overview
High pressure boiler tube is a kind of seamless alloy steel pipe specially used for power station boilers, superheaters, reheaters, headers and high-pressure steam pipelines. It operates under long-term high temperature, high pressure and flue gas oxidation & corrosion environments. Manufactured strictly in accordance with GB and ASTM/ASME international standards, the tube features high temperature creep resistance, high tensile strength, excellent oxidation resistance and stable structural performance, which is the key pressure-bearing component of thermal power, chemical and heating equipment.
Main Application Scenarios
Thermal power plant: Boiler water wall, superheater tube, reheater tube, header pipe, steam main pipeline
Industrial heating equipment: High-pressure steam boiler, waste heat boiler, heat exchanger
Petrochemical industry: High-temperature reaction furnace tube, heat transfer pipeline
New energy: Biomass power station boiler, garbage incineration boiler
Production Process
Adopt hot rolling, hot expanding and cold drawing integrated seamless forming process. Complete heat treatment, fine finishing, full-length non-destructive testing and hydrostatic pressure test before delivery.Delivery cycle: 5-7 days; Shipping port: Tianjin Port; MOQ: 5 tons.
2. Executive Standards
National standards: GB/T 5310, GB/T 20801, GB 3087International standards: ASTM A213, ASTM A335, ASME SA213, ASME SA335
3. Main Steel Grades & Application Range
Carbon Steel Boiler Tubes (Medium & Low Pressure)
20G: For medium-pressure boiler furnace tubes, water cooling walls, working temperature ≤480℃
Low Alloy High Pressure Boiler Tubes (High Pressure Conventional Units)
15CrMoG: Superheater, reheater, header, applicable temperature ≤550℃
12Cr1MoVG: Mainstream high-pressure boiler tube, widely used for 550℃ ultrahigh pressure boiler heating surface tubes
Heat Resistant Alloy Tubes (Ultra-supercritical / Supercritical Generators)
P91 / 10Cr9Mo1VNbN: Ultra-supercritical boiler header, main steam pipe, max service temperature 620℃
P92 / 12Cr9Mo2WCoVNbN: Higher creep strength, used for large-capacity high parameter thermal power units
TP304H, TP347H Austenitic Stainless Steel: Ultra-high temperature superheater tubes with superior anti-oxidation performance
4. Specification Parameters
Outer diameter range: 16mm ~ 720mmWall thickness range: 2.0mm ~ 120mmStandard fixed lengths: 6m, 9m, 12mEnd treatment: Plain ends, beveled ends as required; deburred smooth inner and outer walls
5. Core Material Performance
High temperature creep resistance: Maintain stable strength under long-term high temperature and pressure without plastic deformation
Excellent high-temperature oxidation resistance: Resist erosion of high-temperature flue gas and steam
Good thermal fatigue performance: Adapt to frequent temperature rise and fall without cracking
Uniform microstructure: Strict normalizing + tempering heat treatment to eliminate internal stress
High purity molten steel: Low sulfur and phosphorus content, effectively prevent high-temperature brittleness
6. Full Set Factory Inspection Items
Mechanical performance test: Room & high temperature tensile test, hardness test, impact test
Metallographic inspection: Grain size, carbide structure detection
Hydrostatic pressure test: Whole tube pressure holding, no deformation or leakage
NDT Non-destructive Testing: Ultrasonic inspection, eddy current inspection for crack, delamination and wall thickness deviation
Chemical composition spectral analysis
Flattening test, flaring test to verify plastic forming performance
7. Surface Treatment
Pickling & bright finishing: Cold-drawn thin-wall tubes for clean inner surface
Shot blasting: Remove oxide scale for hot-rolled tubes
Anti-rust oil coating + plastic end caps for storage and transportation protection
8. Packaging, Shipment & Business Terms
Packaging: Bundled with steel belts, both ends sealed by plastic caps to avoid foreign matter entering
Shipment: Truck to Tianjin Port for sea container shipment, bulk cargo available
Payment: 30% TT advance payment, balance against B/L copy; LC not accepted
Delivery time: Spot goods within 5-7 days; customized special alloy grades 15-25 days
Attached documents: Material Test Certificate, heat treatment report, NDT report, packing list, commercial invoice, certificate of origin
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