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Help CenterSteel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175
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Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175NegotiableMOQ: 5 Metric Tons -
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175NegotiableMOQ: 5 Metric Tons
-
Steel Pipe & Tube & High Pressure Boiler Tube，ASME SA-213、SA-335、SA-106、EN 10216-2、DIN 17175NegotiableMOQ: 5 Metric Tons
High Pressure Boiler Tube Product Specification
High pressure boiler tubes are seamless pressure-bearing steel pipes applied in boilers operating at high pressure and above (working pressure ≥ 9.8 MPa, temperature 450-650℃). They are core safety components for boiler heating surfaces and steam pipelines, serving thermal power, nuclear power, petrochemical and other industries. The products operate continuously under severe conditions of high temperature, high pressure and corrosion, and are manufactured in strict compliance with GB/T 5310-2023 and other relevant standards.
1. Applicable Standards
Domestic Standards
GB/T 5310-2023 (Primary standard, replacing the 2017 version): Specifies full technical requirements including dimensions, materials, heat treatment, non-destructive testing and hydrostatic test.
Supporting standards: GB/T 8163 (Fluid transport steel pipes), GB/T 17395 (Dimension tolerances for steel pipes).
International Standards
American Standards: ASME SA-213 (Superheater & Reheater), SA-335 (Main steam pipeline), SA-106 (General service).
European Standard: EN 10216-2; German Standard: DIN 17175.
2. Materials & Main Chemical Compositions (Classified by Temperature & Pressure)
2.1 Carbon Steel (Operating temperature ≤ 480℃, low-pressure section)
20G: C 0.15-0.25%, Mn 0.30-0.80%. Features excellent ductility and weldability, widely used for water wall tubes and economizer tubes.
2.2 Low Alloy Steel (Operating temperature 500-570℃, medium & high-pressure section)
15CrMoG: Cr 0.8-1.1%, Mo 0.4-0.5%. Stable creep performance below 540℃ with cost advantages.
12Cr1MoVG: Cr 1.0-1.3%, Mo 0.25-0.35%, V 0.15-0.30%. High strength at 570℃, suitable for superheaters and reheaters.
2.3 High Alloy Heat-resistant Steel (Operating temperature 580-650℃, supercritical & ultra-supercritical units)
P91/T91 (10Cr9Mo1VNb): Cr 8.0-9.5%, Mo 0.85-1.05%, strengthened by V and Nb elements. Outstanding long-term strength at 600℃, the preferred material for main steam pipelines.
P92/T92: Alloyed with tungsten and boron based on P91. Optimal creep resistance above 620℃, the key material for ultra-supercritical power units.
3. Dimension Parameters (Seamless Pipes, Hot Rolled / Cold Drawn)
3.1 Dimension Range
Outer Diameter: 16-1016 mm; Wall Thickness: 2-100 mm
Common Specifications (mm):
Small size: Φ38×4.5, Φ42×5, Φ51×6 (For heating surfaces)
Medium size: Φ159×10, Φ219×12 (For headers)
Large size: Φ325×16, Φ530×25 (For main steam pipelines)
3.2 Dimension Tolerance (In accordance with GB/T 5310)
Outer Diameter: ±1% (OD ≥ 50 mm), ±0.5 mm (OD ＜ 50 mm)
Wall Thickness: ±12.5%; Ovality shall not exceed 80% of outer diameter tolerance.
3.3 Theoretical Weight (kg/m)
Calculation Formula: W=0.02466×(D−S)×S (D = Outer diameter, S = Wall thickness)
4. Production Process
Raw Material: High-quality continuous casting round billet (low sulfur and phosphorus content: S ≤ 0.015%, P ≤ 0.025%).
Piercing: Hot rolling piercing at 1200-1250℃ to produce hollow shell.
Rolling & Drawing: Hot rolling with ACC cooling (grain size ≥ Grade 8) or cold drawing for high precision sizing.
Heat Treatment (Core Process):
20G / 15CrMoG: Normalizing + Tempering (Normalizing: 890-920℃, Tempering: 600-650℃)
12Cr1MoVG: Normalizing at 980-1020℃, Tempering at 720-760℃
P91/T91: Normalizing at 1040-1080℃, Tempering at 750-780℃ (Martensitic structure)
Finishing: Straightening, cutting to length, surface grinding, non-destructive testing and hydrostatic test.
5. Main Performance Requirements
5.1 Mechanical Properties (Ambient Temperature, GB/T 5310)
| Material | Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation A (%) |
|---|---|---|---|
| 20G | 415-550 | ≥245 | ≥24 |
| 15CrMoG | 440-640 | ≥295 | ≥22 |
| 12Cr1MoVG | 490-665 | ≥245 | ≥21 |
| P91/T91 | ≥585 | ≥415 | ≥20 |
5.2 High Temperature Performance
Creep Strength: At 580℃ for 10⁵ hours, 12Cr1MoVG ≥ 80 MPa, P91 ≥ 120 MPa.
Rupture Strength: At 600℃ for 10⁵ hours, P92 ≥ 140 MPa, excellent resistance to high-temperature deformation.
Oxidation Resistance: Oxidation rate ≤ 0.1 g/(m²·h) at 550℃.
5.3 Technological Properties
Flattening Test: No cracks (Flattening coefficient: 0.85)
Flaring Test: Flaring rate ≥ 15% (60° drift angle)
Bending Test: No cracks after 180° bending.
5.4 100% Non-destructive Testing
Ultrasonic Testing (UT): Detect internal cracks, inclusions and laminations (GB/T 5777)
Eddy Current Testing (ET): Detect surface and subsurface defects (GB/T 7735)
Hydrostatic Test: Test pressure calculated by formula P=2SR/D. Keep pressure for no less than 5 seconds without leakage.
6. Main Applications
Thermal Power Generation: Used for superheaters, reheaters, water walls, economizers, main steam pipelines and headers of subcritical and supercritical boilers.
Nuclear Power: Steam generators and high temperature & high pressure pipelines (P91/T92).
Petrochemical Industry: Cracking furnace tubes, hydrogenation reactors and high temperature & high pressure heat exchangers (15CrMoG).
Industrial Boilers: Heating surfaces of high-pressure steam boilers, waste heat boilers and waste incineration boilers.
7. Delivery Condition & Packaging
Delivery Condition: Normalized and tempered (N+T). Pipe surface shall be free from scale, cracks and laps.
Packaging:
Small pipes: Bundled (Each bundle ≤ 2 tons), both ends protected with plastic caps.
Large pipes: Individually packed, wrapped with anti-rust paper and woven cloth.
Marking: Each pipe is marked with material grade, dimension, standard, heat number, manufacturer and production date.
Quality Documents: Material certificates including chemical composition report, mechanical property report, NDT report and hydrostatic test record are delivered together with goods.
8. Industry Development Trend
Higher Operating Temperature: Ultra-supercritical units are continuously upgraded, driving the wider application of high alloy heat-resistant pipes.
Higher Purity: Sulfur and phosphorus content are controlled below 0.010% to improve toughness and fatigue resistance.
Higher Precision: Dimension tolerance is controlled within ±0.5% to adapt to automatic welding.
Longer Service Life: Optimized heat treatment process extends the service life to over 100,000 hours.
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