ASTM A234 WP11 Pipe Cap – Alloy Steel Butt Weld Caps (ASME B16.9)
ASTM A234 WP11 pipe caps are alloy steel butt weld fittings used to seal the ends of pipelines in high-temperature and high-pressure systems. Made from 1.25Cr-0.5Mo chromium-molybdenum steel and manufactured to ASME B16.9 standards, they offer excellent creep resistance, oxidation resistance, and long-term reliability in power and petrochemical applications.
What is ASTM A234 WP11 Pipe Cap?
ASTM A234 WP11 is a chromium-molybdenum alloy steel fitting designed for elevated temperature service.
WP11 pipe caps are used to:
- Seal pipeline ends
- Withstand high pressure and temperature
- Ensure safe operation in critical systems
Key Features of WP11 Pipe Caps
- High creep resistance at elevated temperatures
- Improved oxidation resistance
- Strong mechanical performance
- Suitable for long-term high-pressure service
- Better performance than carbon steel (WPB)
Product Specifications
- Product Type: Alloy Steel Pipe Cap
- Material Grade: ASTM / ASME A234 WP11
- Standard: ASME B16.9
- Connection: Butt Weld
Size Range
- 1/2″ – 48″ (DN15 – DN1200)
- Custom sizes available
Wall Thickness
- SCH10 – SCH160
- STD / XS / XXS
Surface Treatment
- Black painted
- Anti-rust oil
- Customized coating
Chemical Composition – ASTM A234 WP11 (%)
| Element | Requirement |
|---|---|
| C | ≤ 0.15 |
| Mn | 0.30 – 0.60 |
| Cr | 1.00 – 1.50 |
| Mo | 0.44 – 0.65 |
| Si | ≤ 0.50 |
| P | ≤ 0.040 |
| S | ≤ 0.040 |
Mechanical Properties
- Tensile Strength: ≥ 415 MPa
- Yield Strength: ≥ 205 MPa
👉 Designed for high-temperature service up to ~550°C
Applications of ASTM A234 WP11 Pipe Caps
Widely used in:
- Power generation plants
- Petrochemical processing facilities
- Oil & gas refineries
- Boilers and heat exchangers
- High-pressure steam pipelines
Ideal for high-temperature and high-pressure environments
Quick Summary of ASTM A234 WP11 Pipe Caps
- Material: ASTM A234 WP11 (1.25Cr-0.5Mo)
- Standard: ASME B16.9
- Type: Butt weld pipe cap
- Size: 1/2″ – 48″
- Temp: Up to ~550°C
- Application: Power, oil & gas, petrochemical
Why Choose Our WP11 Pipe Caps?
- Manufactured strictly to ASME B16.9
- Full heat number traceability
- EN 10204 3.1 certification
- Third-party inspection (SGS / BV / TUV)
- Strict dimensional inspection and NDT testing
- Fast production and global export experience
FAQ: ASTM A234 WP11 Pipe Caps
Q1: What is ASTM A234 WP11 material?
ASTM A234 WP11 is a chromium-molybdenum alloy steel (1.25Cr-0.5Mo) used for high-temperature pressure piping fittings.
Q2: What temperature is WP11 suitable for?
WP11 is typically suitable for service temperatures up to approximately 550°C.
Q3: What is the difference between WP11 and WPB?
WP11 is alloy steel for high-temperature service, while WPB is carbon steel used for moderate temperature applications.
Q4: What industries use WP11 pipe caps?
Power plants, petrochemical industries, oil refineries, and steam systems.
ASTM A234 WP11 Pipe Caps-Alloy Steel Butt Weld Caps ASME B16.9
Related Products
ASTM A234 WP11 elbow LR 180deg
ASTM A234 WP11 Lateral Tee Reducing Lateral Tee
