Butt Weld Caps Manufacturer | ASME B16.9 EN 10253 GOST 17379 Pipe Caps
Butt weld caps are pipe fittings used to seal the end of pipelines in industrial piping systems.
Manufactured according to ASME B16.9, MSS SP75, EN 10253 , and GOST 17379 standards,
they are available in carbon steel, stainless steel, and alloy steel for various industrial applications.
Butt Weld Caps Manufacturer and Supplier
Butt weld caps are pipe fittings used to seal the end of pipelines in industrial piping systems. They provide a reliable closure for pipes and help protect pipelines from contamination, leakage, and damage. Compared with threaded or socket weld fittings, butt weld caps offer stronger connections and better durability for high-pressure and high-temperature applications.
These fittings are widely used in oil and gas pipelines, petrochemical plants, power generation facilities, shipbuilding, and water treatment systems. Butt weld caps are manufactured according to international standards such as ASME B16.9, MSS SP, EN standards, and GOST standards, ensuring compatibility with global pipeline projects.
As a professional pipe fittings manufacturer and supplier, we provide high-quality butt weld caps in carbon steel, stainless steel, and alloy steel, available in various sizes and wall thicknesses to meet different industrial requirements.
Standards for Butt Weld Caps
Butt weld pipe caps are produced according to internationally recognized standards to ensure dimensional accuracy and reliable performance.
Common standards include:
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ASME B16.9 – Factory-made wrought butt welding fittings
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MSS SP-75 – High-test wrought butt welding fittings
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EN 10253 – European standard for butt welding fittings
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GOST 17379 – Steel butt weld caps used in Russia and CIS countries
These standards define the manufacturing requirements, tolerances, and dimensions for pipe fittings used in industrial pipeline systems.
Materials of Butt Weld Pipe Caps
Butt weld caps are manufactured in a variety of materials depending on operating conditions such as pressure, temperature, and corrosion resistance.
Carbon Steel Caps
Common grades include:
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ASTM A234 WPB
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ASTM A420 WPL6
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ASTM A860
Carbon steel caps are widely used in oil pipelines, gas transmission systems, and industrial piping networks.
Stainless Steel Caps
Typical stainless steel grades include:
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ASTM A403 WP304 / WP304L
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ASTM A403 WP316 / WP316L
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ASTM A403 WP321
These caps offer excellent corrosion resistance and are suitable for chemical processing, food production, and pharmaceutical industries.
Alloy Steel Caps
Alloy steel caps are designed for high-temperature and high-pressure applications.
Typical grades include:
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ASTM A234 WP11
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ASTM A234 WP22
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ASTM A234 WP91
These materials are commonly used in power plants and refinery piping systems.
Size Range and Specifications
Butt weld caps are available in a wide range of sizes to meet various pipeline requirements.
Typical specifications include:
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Size range: 1/2 inch to 72 inch
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Wall thickness: SCH 10 to SCH 160 / XXS
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Connection type: Butt weld
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Manufacturing method: Hot forming or cold forming
All fittings undergo strict dimensional inspection and quality testing before shipment to ensure compliance with international standards.
Applications of Butt Weld Caps
Butt weld caps are widely used in many industries due to their strong welded connection and long service life.
Typical applications include:
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Oil and gas pipelines
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Petrochemical plants
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Power generation systems
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Chemical processing facilities
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Shipbuilding industry
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Water treatment systems
They provide a secure and durable closure for pipeline ends, ensuring safe operation and protection of pipeline systems.
Frequently Asked Questions
What is a butt weld cap?
A butt weld cap is a pipe fitting used to close the end of a pipeline. It is welded directly to the pipe to form a strong and leak-proof seal.
What standards are butt weld caps manufactured to?
Most butt weld caps are produced according to ASME B16.9, with additional standards such as MSS SP, EN 10253, and GOST 17379 depending on project requirements.
What materials are available for butt weld caps?
Common materials include carbon steel, stainless steel, and alloy steel, depending on the pressure, temperature, and corrosion requirements of the pipeline system.
In addition to butt weld reducers, we also supply a full range of butt weld pipe fittings, including
