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China Suppliers Factory: EN 10216-2:2024 Seamless Steel Tubes for Pressure Equipment at Elevated Temperatures
Ordering Information
Purchasers must specify:
- 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
- S1: Special cleanliness (e.g., for hydrogen service).
- S2: Additional NDT (e.g., full-body ultrasonic testing).
- S3: Specific heat treatment conditions.
Key Applications
- Power plants (boiler tubes, super-heaters)
- Oil & gas (pressure vessels, heat exchangers)
- Chemical industry (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 |
Alloy Steel Grades (Cr-Mo & Heat-Resistant Steels)
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
- Non-alloy grades (P195GH, P235GH, P265GH) are used for moderate temperatures (up to ~450°C).
- Cr-Mo grades (13CrMo4-5, 10CrMo9-10, etc.) are for high-temperature creep resistance (e.g., power plants).
- P91/P92 grades are for ultra-supercritical (USC) boilers (600°C+).
- Stainless 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 what types of steel tubes does it cover?
EN 10216-2 is a European standard specifying technical delivery conditions for seamless steel tubes used in pressure applications. It covers both non-alloy steel grades (such as P195GH, P235GH, P265GH) and alloy steel grades (such as 16Mo3, 13CrMo4-5, and P91), all designed for elevated temperature service in industries like power generation, oil & gas, and chemical processing.
What is the difference between EN 10216-2 P91 and ASTM A335 P91?
EN 10216-2 grade X10CrMoVNb9-1 is the European equivalent of ASTM A335 P91. Both grades share a similar chemical composition (9% Cr, 1% Mo, with V and Nb additions) and are designed for ultra-supercritical (USC) boiler applications above 600°C. Minor differences may exist in testing requirements and certification documentation between the two standards.
What inspection documents are required when ordering EN 10216-2 tubes?
EN 10204 Type 3.1 certification is mandatory for all EN 10216-2 tubes, providing the manufacturer's self-certification of compliance. If independent third-party verification is required, EN 10204 Type 3.2 certification can be specified. Full traceability including heat number and manufacturing process records should also be provided.
Which EN 10216-2 grades are suitable for high-temperature creep service?
For high-temperature creep resistance, Cr-Mo grades such as 13CrMo4-5, 10CrMo9-10, and X11CrMo9-1 are recommended for service up to approximately 550°C. For ultra-supercritical applications exceeding 600°C, advanced grades such as X10CrMoVNb9-1 (P91) and X11CrMoWVNb9-1-1 (P92) are the preferred choices due to their superior creep strength and oxidation resistance.
What mandatory tests are required for EN 10216-2 seamless steel tubes?
Mandatory tests include a tensile test per EN ISO 6892-1, a hydrostatic pressure test (or agreed NDT alternative), and a flattening or bend test depending on tube dimensions. An impact test per EN ISO 148-1 is also required when specified by the purchaser or when the grade demands it. Optional tests such as ultrasonic testing, eddy current testing, grain size analysis, and hardness testing may also be requested.
What information must be provided when placing an order for EN 10216-2 tubes?
When ordering EN 10216-2 seamless steel tubes, purchasers must specify the quantity, material grade designation, outer diameter, wall thickness, length, delivery condition (e.g., normalized or tempered), required testing, inspection document type, and any special requirements such as hydrogen service compatibility or supplementary NDT. Providing complete ordering information ensures compliance and avoids delivery delays.