Reliable Connection Solutions for Pressure Piping Systems
1. Standard Overview and Product Positioning
EN 10253-2 is the core European standard for factory-made butt-welding steel fittings used in pressure piping systems.
Within this standard, Type B represents the higher-quality execution level, featuring tighter dimensional tolerances, enhanced inspection requirements, and improved surface quality.
EN 10253-2 Type B fittings are widely applied in low- and medium-pressure pipelines for the transportation of water, steam, gas, oil, and various industrial fluids, particularly where welding quality and dimensional accuracy are critical.
2. Type B vs. Type A – Technical Execution Comparison
Table 1: Key Differences Between EN 10253-2 Type B and Type A
|
Item |
Type B |
Type A |
Engineering Benefit |
| Wall thickness tolerance | ±12.5% | ±15% | More stable pressure performance |
| Ovality control | Stricter | Standard | Better fit-up during welding |
| NDT requirements | Enhanced options | Basic | Higher quality assurance |
| Surface quality | Higher | Normal | Reduced defect risk |
| Typical application | Pressure systems | General use | More suitable for critical pipelines |
3. Product Range and Dimensions
Womic Steel supplies a full range of EN 10253-2 Type B butt-weld fittings.
Table 2: Standard Product Scope
|
Fitting Type |
Size Range (DN) |
Pressure Class |
Standard |
| 90° Elbow | DN15 – DN600 | PN6 – PN25 | EN 10253-2 |
| 45° Elbow | DN15 – DN600 | PN6 – PN25 | EN 10253-2 |
| Equal Tee | DN15 – DN600 | PN6 – PN25 | EN 10253-2 |
| Reducing Tee | DN20×15 – DN600×500 | PN6 – PN25 | EN 10253-2 |
| Concentric Reducer | DN20×15 – DN600×500 | PN6 – PN25 | EN 10253-2 |
| Pipe Cap | DN15 – DN600 | PN6 – PN25 | EN 10253-2 |
4. Common Materials and Steel Grades
EN 10253-2 Type B fittings are typically manufactured from carbon and alloy steels suitable for pressure service.
Table 3: Common Steel Grades for EN 10253-2 Type B
|
Steel Grade |
Material No. |
Typical Application |
| P235GH | 1.0345 | Water, air, low-pressure piping |
| P265GH | 1.0425 | Steam, oil, industrial pipelines |
| 16Mo3 | 1.5415 | Elevated temperature service |
5. Chemical Composition Requirements
Table 4: Chemical Composition (Typical Limits, wt.%)
|
Grade |
C |
Mn |
Si |
P |
S |
Mo |
| P235GH | ≤0.16 | ≤1.20 | ≤0.35 | ≤0.025 | ≤0.020 | — |
| P265GH | ≤0.20 | ≤1.40 | ≤0.40 | ≤0.025 | ≤0.020 | — |
| 16Mo3 | ≤0.16 | 0.40–0.90 | ≤0.35 | ≤0.025 | ≤0.020 | 0.25–0.35 |
6. Mechanical Properties and Impact Requirements
Table 5: Mechanical Properties (Room Temperature)
|
Grade |
Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation (%) |
| P235GH | ≥235 | 360–500 | ≥25 |
| P265GH | ≥265 | 410–570 | ≥23 |
| 16Mo3 | ≥280 | 450–600 | ≥22 |
Table 6: Impact Test Requirements
|
Grade |
Test Temperature |
Minimum Impact Energy |
| P235GH | 0 °C | ≥27 J |
| P265GH | 0 °C | ≥27 J |
| 16Mo3 | −20 °C | ≥27 J |
7. Manufacturing Process and Inspection
EN 10253-2 Type B fittings supplied by Womic Steel are produced using controlled hot forming or cold forming processes, followed by dimensional calibration.
Key inspection and testing include:
● Chemical analysis (spectrometer)
● Mechanical testing (tensile, impact)
● Dimensional inspection
● Wall thickness measurement
● Visual and surface inspection
● Optional NDT (UT / MT) upon request
All products are supplied with EN 10204 3.1 or 3.2 certificates, ensuring full traceability. 
8. Production Capacity, Packaging and Delivery
● No MOQ: One piece acceptable
● Standard sizes: Fast delivery from stock
● Large sizes / special materials: Made-to-order
● Packaging: VCI anti-rust protection + seaworthy packing
● Logistics: Optimized sea, rail, and multimodal transport solutions
9. Typical Applications
EN 10253-2 Type B fittings are widely used in:
1. Heating and HVAC systems
2. Industrial process pipelines
3. Water treatment facilities
4. Energy and utility piping
5. Boiler auxiliary systems
10. Why Choose Womic Steel
Strict compliance with EN 10253-2 Type B
● Stable raw material sourcing
● Complete inspection capability
● Flexible production and fast response
● Global project supply experience
We pride ourselves on our customization services, fast production cycles, and global delivery network, ensuring your specific needs are met with precision and excellence.
Website: www.womicsteel.com
Email: sales@womicsteel.com
Tel/WhatsApp/WeChat: Victor: +86-15575100681 or Jack: +86-18390957568
Post time: Mar-06-2026