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EN 10216-2:2024 Seamless Steel Tubes for Pressure - China Suppliers and Factory for High-Temperature Applications
Ordering Information
- Quantity (length, number of tubes)
- Material designation (e.g., P235GH, 13CrMo4-5)
- Dimensions (outer diameter, wall thickness, length)
- Delivery condition (e.g., normalized, tempered)
- Testing requirements (e.g., impact testing, NDT)
- Inspection documents (e.g., EN 10204 Type 3.1 or 3.2)
- Special requirements (e.g., hydrogen compatibility, additional tests)
Material Grades & Chemical Composition
Non-Alloy Steels (for Elevated Temp Service)
| Grade | C (max) | Mn | Si | P (max) | S (max) | Other |
|---|---|---|---|---|---|---|
| P195GH | 0.13% | 0.40–1.20% | ≤0.40% | 0.025% | 0.015% | – |
| P235GH | 0.16% | 0.60–1.20% | ≤0.35% | 0.025% | 0.015% | – |
| P265GH | 0.20% | 0.80–1.40% | ≤0.40% | 0.025% | 0.015% | – |
Alloy Steels (Cr-Mo & Heat-Resistant Grades)
| Grade | C | Cr | Mo | Other |
|---|---|---|---|---|
| 16Mo3 | 0.12–0.20% | – | 0.25–0.35% | – |
| 13CrMo4-5 | 0.08–0.18% | 0.70–1.15% | 0.40–0.60% | – |
| X10CrMoVNb9-1 (P91) | 0.08–0.12% | 8.0–9.5% | 0.85–1.05% | V, Nb |
Mechanical Properties
Room Temperature Requirements
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| P235GH | ≥235 | 360–510 | ≥25 |
| 16Mo3 | ≥270 | 450–600 | ≥22 |
| 13CrMo4-5 | ≥280 | 460–640 | ≥20 |
Elevated Temperature Properties
- Creep resistance data provided for long-term high-temp service.
- Impact testing required for certain grades (e.g., -20°C or -50°C).
Test Requirements
Mandatory Tests
- Tensile test (per EN ISO 6892-1)
- Hydrostatic test (or non-destructive testing (NDT) if agreed)
- Flattening test / Bend test (for certain sizes)
- Impact test (if specified, per EN ISO 148-1)
Optional Tests (if required by purchaser)
- Ultrasonic testing (UT) or eddy current testing (ET)
- Grain size analysis
- High-temperature tensile testing
- Hardness testing
Inspection & Certification
- EN 10204 Type 3.1 (mandatory) – Manufacturer's self-certification.
- EN 10204 Type 3.2 (if required) – Independent inspection.
- Traceability (heat number, manufacturing process).
Marking & Surface Condition
- Permanent marking: Grade, size, manufacturer, heat number, standard.
- Surface finish: Free from defects affecting performance.
Supplementary Requirements
- S1Special cleanliness (e.g., for hydrogen service).
- S2Additional NDT (e.g., full-body ultrasonic testing).
- S3Specific heat treatment conditions.
Key Applications
🏭
Power Plants
Boiler tubes, super-heaters
Boiler tubes, super-heaters
🛢️
Oil & Gas
Pressure vessels, heat exchangers
Pressure vessels, heat exchangers
⚗️
Chemical Industry
High-temp piping
High-temp piping
Major Steel Grades & Category
Non-Alloy Steel Grades (for Elevated Temperature Service)
| Grade | Similar to | Key Characteristics |
|---|---|---|
| P195GH | – | Low-carbon, general-purpose |
| P235GH | ASTM A106 Gr.B | Standard boiler/pipe steel |
| P265GH | – | Higher strength than P235GH |
Molybdenum (Mo) Steels
| Grade | Similar to ASTM | Alloy Composition |
|---|---|---|
| 16Mo3 | A335 P1 / A209 T1a | 0.3% Mo (low-alloy) |
| 20Mo4 | – | Higher Mo than 16Mo3 |
Chromium-Molybdenum (Cr-Mo) Steels
| Grade | Similar to ASTM | Alloy Composition |
|---|---|---|
| 13CrMo4-5 | A335 P12 / A213 T12 | 1% Cr-0.5% Mo |
| 10CrMo5-5 | – | 1% Cr-0.5% Mo (variant) |
| 10CrMo9-10 | A335 P22 / A213 T22 | 2.25% Cr-1% Mo |
| X11CrMo5 | – | 5% Cr-0.5% Mo |
| X11CrMo9-1 | A335 P9 / A213 T9 | 9% Cr-1% Mo |
Advanced High-Temperature Steels (Cr-Mo-V-Nb)
| Grade | Similar to ASTM | Alloy Composition |
|---|---|---|
| X10CrMoVNb9-1 (P91) | A335 P91 / A213 T91 | 9% Cr-1% Mo-V-Nb |
| X11CrMoWVNb9-1-1 | A335 P92 | 9% Cr-2% W-1% Mo-V-Nb |
| X11CrWMoVNb9-2-2 | – | 11% Cr-2% W-Mo-V-Nb |
Stainless / Ferritic-Martensitic Steels
| Grade | Similar to ASTM | Alloy Composition |
|---|---|---|
| X20Cr13 | – | 13% Cr (martensitic) |
| X6CrNiNb18-10 | A213 TP347H | 18% Cr-10% Ni-Nb (austenitic) |
Key Notes
- 1Non-alloy grades (P195GH, P235GH, P265GH) are used for moderate temperatures (up to ~450°C).
- 2Cr-Mo grades (13CrMo4-5, 10CrMo9-10, etc.) are for high-temperature creep resistance (e.g., power plants).
- 3P91/P92 grades are for ultra-supercritical (USC) boilers (600°C+).
- 4Stainless grades (X6CrNiNb18-10) are included for corrosion-resistant high-temp applications.
Comparison with ASTM Standards
- EN 10216-2 X10CrMoVNb9-1 ≈ ASTM A335 P91
- EN 10216-2 13CrMo4-5 ≈ ASTM A335 P12
- EN 10216-2 10CrMo9-10 ≈ ASTM A335 P22
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❓ Frequently Asked Questions (FAQ)
What is EN 10216-2 and which tube types does it cover?
EN 10216-2 is a European standard specifying technical delivery conditions for seamless steel tubes used in pressure applications at elevated temperatures. It covers both non-alloy grades (e.g., P235GH, P265GH) and alloy grades (e.g., 13CrMo4-5, P91) for use in boilers, heat exchangers, and pressure piping systems.
What is the difference between P91 (X10CrMoVNb9-1) and standard Cr-Mo grades?
P91 is an advanced 9% Cr-1% Mo steel with additions of Vanadium (V) and Niobium (Nb), offering superior creep resistance at temperatures above 600°C. Standard Cr-Mo grades like 13CrMo4-5 are suitable for lower temperature ranges (up to ~550°C) and do not contain V or Nb additions.
What inspection documents are required for EN 10216-2 tubes?
EN 10204 Type 3.1 (manufacturer's self-certification) is mandatory for all EN 10216-2 tubes. EN 10204 Type 3.2 (independent third-party inspection) may be required by the purchaser for critical applications. Both documents ensure full traceability including heat number and manufacturing process.
How do EN 10216-2 grades compare to ASTM standards?
Several EN 10216-2 grades have close ASTM equivalents: X10CrMoVNb9-1 (P91) corresponds to ASTM A335 P91 / A213 T91; 13CrMo4-5 corresponds to ASTM A335 P12 / A213 T12; and 10CrMo9-10 corresponds to ASTM A335 P22 / A213 T22. While similar in composition, there may be minor differences in testing requirements and tolerances.
What mandatory tests are required for EN 10216-2 seamless tubes?
Mandatory tests include: tensile test (per EN ISO 6892-1), hydrostatic test or agreed NDT alternative, flattening/bend test for certain dimensions, and impact test if specified by the purchaser (per EN ISO 148-1). Optional tests such as ultrasonic testing (UT), eddy current testing (ET), grain size analysis, and hardness testing may also be requested.
What supplementary requirements can be specified when ordering EN 10216-2 tubes?
Purchasers can specify supplementary requirements including: S1 (special cleanliness for hydrogen service), S2 (additional NDT such as full-body ultrasonic testing), and S3 (specific heat treatment conditions). These are agreed upon at the time of order and must be clearly stated in the purchase specification.