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Help CenterSteel Pipe & Tube & High Pressure Boiler Tube，ASME SA210、ASME SA213、ASTM A335 P91/P92、DIN17175
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Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA210、ASME SA213、ASTM A335 P91/P92、DIN17175NegotiableMOQ: 5 Metric Tons -
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA210、ASME SA213、ASTM A335 P91/P92、DIN17175NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA210、ASME SA213、ASTM A335 P91/P92、DIN17175NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA210、ASME SA213、ASTM A335 P91/P92、DIN17175NegotiableMOQ: 5 Metric Tons
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Steel Pipe & Tube & Petroleum Steel Pipe，H40/J55/K55、N80(N80-1/N80Q)、L80 (13Cr-L80)、C90/T95、P110/Q125NegotiableMOQ: 5 Metric Tons
High Pressure Boiler Tube Product Specification
1. Product Overview
High pressure boiler tubes are Seamless Steel Tubes for High-pressure Boilers, manufactured from premium carbon steel and Cr-Mo-V heat-resistant alloy steel via hot rolling or cold drawing. Designed for long-term service under working conditions of steam and flue gas at pressure above 9.8MPa and temperature ranging from 450℃ to 650~C, the tubes feature outstanding high-temperature creep resistance, anti-oxidation & anti-corrosion performance and stable metallurgical structure. They serve as key pressure-bearing components for thermal power plants, cogeneration projects and high-pressure petrochemical equipment.
Shipment Info: Goods delivered from Tianjin Port; delivery lead time: 5–7 working days; full container and bulk shipment available for export.
2. Applicable Standards
Domestic Standard
GB/T 5310-2023 (latest national standard for seamless steel tubes of high-pressure boilers, effective Apr.1,2024); GB/T3087 for medium & low pressure boiler tubes as supplementary reference.
International Equivalent Standards
ASME SA210, ASME SA213, ASTM A335 P91/P92, DIN17175. Products can be produced and inspected in accordance with American or German standards per customer requirements.
3. Main Grades & Chemical Composition
3.1 Carbon Steel Series: 20G, 20MnG
Application: Economizer & water wall tubes working below 480℃ under medium-high pressure
20G (Most Popular Grade)C:0.17~0.24%, Si:0.17~0.37%, Mn:0.35~0.65%; S≤0.015%, P≤0.025% (strict control on harmful impurities)
3.2 Cr-Mo Alloy Steel Series (Main Export Grades)
(1) 15CrMoG (For superheater below 550℃)
C:0.12~0.18%, Cr:0.80~1.10%, Mo:0.40~0.55%, regular Si & Mn content with limited sulfur and phosphorus.
(2) 12Cr1MoVG (Prime grade for ultra-high pressure boiler & main steam pipeline of power station)
| Element | C | Si | Mn | Cr | Mo | V | S | P |
|---|---|---|---|---|---|---|---|---|
| Content(%) | 0.08~0.15 | 0.17~0.37 | 0.40~0.70 | 0.90~1.20 | 0.25~0.35 | 0.15~0.30 | ≤0.010 | ≤0.025 |
Compound addition of Chromium, Molybdenum and Vanadium greatly improves high-temperature creep strength, enabling stable long-term operation under 580℃.
3.3 Advanced Heat-resistant Steel: P91(10Cr9Mo1VNbN), P92
For ultra-supercritical unit main steam pipe over 600℃, preferred by thermal power projects in Europe, Southeast Asia and other overseas markets.
4. Dimension Specification
Outer Diameter (OD): Φ14mm ~ Φ630mm
Wall Thickness (WT): 3mm ~ 120mm (regular range:3~50mm)
Fixed Length: 6m/9m/12m, customized length available
Regular Stock Sizes: Φ32×4, Φ38×4.5, Φ57×5, Φ133×12, Φ219×20, Φ273×28
Theoretical Weight Formula: W=0.02466×(OD-WT)×WT (kg/m, density:7.85g/cm³ for carbon steel)
5. Production Process
Premium continuous casting round billet → furnace heating → hot piercing for seamless forming → sizing & straightening → precise heat treatment (normalizing + tempering for optimized metallographic structure) → shot blasting for rust removal → non-destructive testing → hydrostatic pressure test → end facing & anti-rust painting → bundling & warehousing before delivery.Key Process: Full heat treatment + dual non-destructive inspection, superior to common seamless fluid pipes.
6. Mechanical Properties (Ambient Temperature per GB Standard)
| Grade | Tensile Strength Rm(MPa) | Yield Strength ReL(MPa) | Elongation A(%) | Charpy Impact Value KV₂(J) |
|---|---|---|---|---|
| 20G | 410~550 | ≥245 | ≥24 | ≥35 |
| 15CrMoG | 440~640 | ≥295 | ≥21 | ≥35 |
| 12Cr1MoVG | 470~670 | ≥310 | ≥21 | ≥35 |
High-temperature property: Yield strength ≥180MPa at 450℃; 100,000-hour rupture strength complies with GB appendix to avoid creep deformation under long-term high temperature & pressure.
7. Core Product Advantages
Excellent high temperature & pressure resistance: Max working temp 480℃ for 20G,550℃ for 15CrMoG,580℃ for 12Cr1MoVG, nominal working pressure ≥10MPa.
High-temperature oxidation & steam corrosion resistance: Cr-Mo alloy forms compact protective oxide layer to slow down pipe wall ablation.
Stable microstructure: Uniform grain after heat treatment, no metallographic deterioration or pipe burst risk under long-term high temperature.
Excellent weldability: Suitable for SMAW & GTAW for convenient on-site boiler installation.
Full-range inspection: Every tube passes UT (Ultrasonic Test), ET (Eddy Current Test) and hydrostatic test to eliminate crack, lamination and porosity defects.
8. Application Scope
Thermal & Cogeneration Power Plant: Superheater tube, reheater tube, water wall tube, economizer and main steam pipeline of power station boiler.
Petrochemical Industry: High-temperature & high-pressure process pipeline for hydrogenation unit and cracking furnace.
Coal chemical industry, waste heat boiler and high-pressure connecting pipe of pressure vessel.
Export Market: Thermal power infrastructure projects in Southeast Asia, Middle East and Europe.
9. Factory Inspection & Packing
Inspection Items
Dimensional tolerance & surface visual inspection; 2. Mechanical & chemical lab test; 3. 100% non-destructive test; 4. Individual hydrostatic test with test pressure ≥1.5 times design working pressure.
Packing
Small-size tubes bundled in steel straps; large-size pipes equipped with plastic end caps for protection, pipe ends sealed against rust and marked with grade, dimension, heat number and standard by paint. Original Mill Test Certificate (MTC) provided for customs clearance and commodity inspection.
10. Trade Terms
Payment Term: 30% TT Advance Payment + 70% Balance before shipment, Letter of Credit (LC) not acceptable.
Delivery: FOB Tianjin Port, stock goods loaded within 5~7 days; customized production lead time:10~15 working days.
Available Documents: English & Chinese MTC, customs documents, third-party inspection certificate such as SGS & EN10204 3.1.
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