ASTM A234 WP11 Pipe Caps ASME B16.9
ASTM A234 WP11 pipe caps are alloy steel butt weld fittings designed to seal the end of pipelines in high-temperature and high-pressure service applications. Manufactured strictly in accordance with ASME B16.9 dimensional standards, WP11 caps ensure reliable sealing performance, superior mechanical strength, and long service life in critical piping systems.
Made from 1.25Cr-0.5Mo chromium-molybdenum alloy steel, ASTM A234 WP11 pipe caps provide enhanced creep resistance and improved oxidation resistance at elevated temperatures compared to standard carbon steel fittings.
These alloy steel butt weld caps are widely used in:
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Power generation plants
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Petrochemical processing facilities
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Oil & gas refineries
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Boiler and heat exchanger systems
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High-pressure steam pipelines
Product Specifications
Product Type: Alloy Steel Pipe Cap
Material Grade: ASTM / ASME A234 WP11
Connection: Butt Weld
Standard: ASME B16.9
Size Range
1/2” – 48” (DN15 – DN1200)
Custom sizes available upon request
Wall Thickness
SCH10 – SCH160, STD, XS, XXS
Surface Treatment
Black painted / Anti-rust oil / Customized coating available
Chemical Composition of 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
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Tensile Strength: ≥ 415 MPa
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Yield Strength: ≥ 205 MPa
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Excellent creep resistance for high-temperature service
Why Choose Our ASTM A234 WP11 Pipe Caps?
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Manufactured strictly according to ASME B16.9
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Full heat number traceability
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EN10204 3.1 Mill Test Certificate provided
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Third-party inspection available (SGS / BV / TUV)
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Strict dimensional inspection and NDT testing
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Fast production with global export experience
FAQ
What is ASTM A234 WP11 material?
ASTM A234 WP11 is a chromium-molybdenum alloy steel (1.25Cr-0.5Mo) widely used for high-temperature pressure piping fittings.
What temperature is WP11 suitable for?
WP11 alloy steel is typically suitable for service temperatures up to approximately 550°C, depending on operating conditions and design requirements.
What is the difference between WP11 and WPB?
WP11 is an alloy steel grade designed for elevated temperature service, while WPB is a carbon steel grade used for moderate temperature applications.
ASTM A234 WP11 Pipe Caps-Alloy Steel Butt Weld Caps ASME B16.9
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