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Help CenterSteel Pipe & Tube & High Pressure Boiler Tube，GB/T 5310-2023、ASTM A335、EN 10216-2、DIN 17175
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High Pressure Boiler Tube Product Detailed Description
1. Product Overview
High pressure boiler tube is a kind of seamless steel pipe complying with GB/T 5310-2023 standard. It is specially designed for high pressure (≥9.8MPa) and high temperature (450–650℃) boilers and power station equipment. It is mainly used for conveying high-temperature and high-pressure steam, featuring high temperature resistance, high pressure resistance, creep resistance, oxidation & corrosion resistance and stable microstructure.
2. Execution Standards
Domestic Standard: GB/T 5310-2023 Seamless Steel Tubes for High Pressure Boilers
International Standards: ASTM A335 (P Series), EN 10216-2, DIN 17175
Applicable Working Condition: High pressure / Ultra-high pressure / Subcritical / Supercritical boiler systems with working pressure ≥9.8MPa and temperature above 480℃.
3. Main Materials & Grades
Carbon Structural Steel
20G / 20MnG: Applicable temperature ≤480℃, pressure ≤10MPa; Tensile strength 410–550MPa; For water wall and economizer of medium & high pressure boilers.
Low Alloy Heat Resistant Steel
15CrMoG: Service temperature 500–540℃, pressure 10–14MPa; Excellent creep resistance; Used for superheater, reheater and steam pipeline.
12Cr1MoVG: Service temperature 540–570℃, pressure 17–20MPa; Optimal high-temperature strength and toughness; Core pipe for subcritical power units.
High Alloy Martensitic Steel
P91 (10Cr9MoW2VNb): Service temperature 580–600℃, pressure 24–28MPa; Applied to main steam pipe and reheater pipe of supercritical units.
P92: Service temperature ≥600℃, pressure 28–35MPa; Higher stress rupture strength than P91; Suitable for ultra-supercritical power stations.
Stainless Heat Resistant Steel
304H / 347H: Service temperature 600–650℃; Good resistance to sulfur and chlorine corrosion; For high-temperature heating surfaces in corrosive medium.
4. Specification Parameters
Outer Diameter: 16–630mm (Common size: 32–219mm)
Wall Thickness: 2.0–100mm (Common size: 4.5–60mm)
Length: 4–12m, fixed length / multiple length customized available
Tolerance: OD ±1%, WT ±8% (Hot rolled) / ±5% (Cold drawn)
Surface Finish: Hot rolled black finish, Cold drawn bright finish, Internally ribbed tube for heat transfer enhancement
5. Production Process
Smelting: Electric arc furnace + LF/VD refining, strictly control impurity elements (S≤0.015%, P≤0.020%).
Pipe Making: Continuous casting round billet → Hot rolling piercing → Cold rolling / Cold drawing sizing → Heat treatment (Normalizing & Tempering).
Heat Treatment:
20G / 15CrMoG: Normalizing + Tempering
12Cr1MoVG: 980–1020℃ Normalizing + 720–760℃ Tempering
P91: 1040–1080℃ Normalizing + 750–780℃ Tempering
Inspection: Hydrostatic test per piece (Test pressure ≥20MPa), NDT inspection (UT/MT/ET), mechanical property and metallographic inspection.
6. Application
Power Station Boiler: Superheater tube, Reheater tube, Main steam pipe, Economizer tube, Water wall tube.
Industrial Boiler: High pressure steam boiler, Waste heat boiler, Incineration boiler heating surface and steam pipeline.
Other Fields: Petrochemical high temperature & high pressure reactor, Nuclear power conventional island steam system, Coal chemical high pressure pipeline.
7. Product Advantages
High-temperature creep strength, no deformation or cracking under long-term high temperature.
Excellent oxidation and corrosion resistance in high-temperature flue gas and steam environment.
Stable metallographic structure, maintaining good toughness and plasticity in long service.
Strict NDT and hydrostatic test, high safety factor with zero leakage under extreme working conditions.
8. Packaging & Delivery
Packaging: Anti-rust oil coated → Wrapped with plastic film → Bundled with steel strips → Pipe end protected by plastic caps.
Delivery Time: Standard specifications 5–7 days, customized specifications 10–15 days; Support shipment from Tianjin Port.
Quality Documents: Mill test certificate, Mechanical property report, NDT report, Hydrostatic test record.
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