P355NH Pipe Caps DIN 2617 | EN 10253-2 Type B | ASME B16.9 End Caps
P355NH pipe caps are carbon steel butt weld fittings manufactured according to DIN 2617, EN 10253-2 Type B, and ASME B16.9 standards. These caps are used to close the ends of pipelines and pressure vessels, providing reliable sealing and structural integrity in industrial piping systems.
EN 10253-2 Type B caps are produced from pressure vessel quality steel P355NH, offering improved mechanical properties and stricter inspection requirements compared with Type A fittings. These caps are widely used in power plants, petrochemical facilities, oil and gas pipelines, and pressure equipment systems.
Typical materials used in the production of EN 10253 Butt Welding Pipe Fittings include grades such as 16Mo3, 13CrMo4-5, P235GH, P265GH, P355NH, and L450QB
Standards and Specifications
P355NH pipe caps are manufactured in accordance with multiple international standards:
| Standard | Description |
|---|---|
| DIN 2617 | German standard for butt weld pipe caps |
| EN 10253-2 Type B | European standard for pressure-quality fittings |
| ASME B16.9 | Factory-made wrought butt weld fittings |
These standards define dimensions, tolerances, manufacturing methods and inspection requirements for pipe caps.
Material: P355NH Carbon Steel
P355NH is a normalized carbon steel widely used for pressure equipment and piping systems.
Key characteristics:
- good weldability
- high strength at elevated temperatures
- suitable for pressure vessels and piping
- reliable performance in moderate and high temperature service
Chemical Composition of P355NH
| Element | % |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | 1.00 – 1.70 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Silicon (Si) | ≤ 0.50 |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | ≥ 355 MPa |
| Tensile Strength | 470 – 630 MPa |
| Impact Test | Required (low temperature toughness) |
EN 10253-2 Type B fittings require impact testing and stricter quality control, making them suitable for critical applications.
Manufacturing Process
P355NH pipe caps are typically manufactured through:
- hot forming
- cold forming
- heat treatment (normalizing)
- machining and beveling
- dimensional inspection
All caps comply with butt weld end preparation requirements.
Applications
P355NH pipe caps are widely used in:
- pressure vessels
- boiler systems
- oil and gas pipelines
- petrochemical plants
- power generation facilities
These caps are commonly used together with P355NH elbows, tees, reducers and flanges.
Related Pipe Fittings
Other fittings manufactured according to EN 10253-2 Type B include:
- P355NH Elbows (DIN 2605 / EN 10253)
- P355NH Tees (DIN 2615)
- P355NH Reducers (DIN 2616)
- P355NH Pipe Caps (DIN 2617)
