Buttweld Fittings
Buttweld End Cap
Buttweld end caps to ASME B16.9 for closing a pipe end, 1/2″ to 48″, in stainless, carbon and alloy steel, with dimension tables by class.
Specification
At a glance
- Dimensional standard
- ASME B16.9
- Size range
- 1/2″ – 48″
- Types & ends
- Ellipsoidal head · Butt weld (bevelled) end
- Grades
- Mild SteelIS 1239 Part 2 / IS 2062 Gr. A
- Carbon SteelASTM A234 WPB / ASTM A420 WPL6
- Stainless SteelASTM A403 WP304/304L/316/316L
- Alloy SteelASTM A234 WP11 / WP22 / WP91
- Also offered in
- Stainless steel
- Carbon steel
- Alloy steel
Dimension tables
8 classes · dimensions, weights, Excel
Stainless Steel
As published by Fortune Fittings Private Limited. Grade and availability are confirmed with each enquiry; confirm the governing standard, size and grade when ordering. Spotted a mistake? Please contact us.
Overview
Product overview
Our Buttweld End Caps are crafted from high-quality materials, including stainless steel, copper, and ductile iron, each chosen for its specific properties and suitability for different environments. Whether you require corrosion resistance, temperature resistance, or durability, our end caps are engineered to meet your needs.
Available in a wide range of dimensions, our end caps cater to different pipe sizes, ranging from ½ inch to 48 inches in diameter. The thickness of the end caps varies according to the pipe diameter, ensuring a snug fit and reliable performance.
We understand the importance of protection, containment, aesthetics, and safety in piping systems, and our end caps serve these purposes effectively. By capping off the end of a pipe or tube, our end caps protect against external factors such as dirt, debris, and moisture, ensuring the integrity of your piping system.
Moreover, our end caps provide containment, keeping the contents of the pipe or tube secure and separate from the surrounding environment.
Get in touch to learn more about our sizes, prices, and dimensions, and let us provide the perfect solution for your piping system requirements.
What is a Buttweld End Cap?
A Buttweld End Cap is a type of pipe fitting designed to cap off the end of a pipe or tube. It is used to seal the end of the pipe, preventing the ingress of foreign particles, contaminants, or fluids into the piping system. End caps are commonly used in various industries and applications where the termination of a pipe is required for safety, containment, or aesthetic purposes. These fittings are welded directly onto the end of the pipe, providing a secure and permanent closure. They are available in different materials, sizes, and dimensions to accommodate various pipe sizes and specifications.
Where it is used
Applications and service
Typical duty across the process industries we supply.
- Pipeline SystemsEnd caps are essential components in pipeline systems to seal the ends of pipes, preventing the ingress of contaminants, moisture, and debris. They help maintain the integrity of the pipeline and protect against corrosion and damage.
- Plumbing SystemsIn plumbing installations, end caps are used to seal the ends of pipes in residential, commercial, and industrial buildings. They ensure leak-proof connections and prevent the entry of foreign particles, ensuring the smooth flow of water or other fluids.
- Process IndustriesEnd caps play a crucial role in various process industries such as chemical processing, oil and gas refining, and petrochemical plants. They are used to seal openings in vessels, tanks, and equipment, maintaining process integrity and preventing product contamination.
- HVACHVAC systems utilize end caps to seal the ends of ductwork, air handling units, and ventilation systems. By sealing off ducts and channels, end caps help optimize airflow, improve energy efficiency, and maintain indoor air quality.
- Structural FabricationIn structural fabrication and construction projects, end caps are used to close off the ends of structural members such as beams, columns, and tubes. They provide a finished appearance, protect against corrosion, and enhance structural stability.
- Water Treatment and DistributionEnd caps are employed in water treatment plants and distribution networks to seal the ends of pipes, valves, and fittings. They help prevent contamination of potable water supplies and maintain system hygiene and safety.
Engineering
Technical notes
How the component behaves in the line, and the details to settle before an order is placed.
How it behaves in the line
- Hemispherical or ellipsoidal head geometry: higher strength-to-weight than flat plate
- Length H per ASME B16.9
- Can be used as a test port by drilling and threading after installation
- No access after welding: ensure all internal work is complete before fitting
Confirm when ordering
- Confirm wall schedule matches the pipe: cap wall governs pressure rating
- For high-pressure service: specify schedule matching run pipe (not lighter)
Dimensions, wall thicknesses and pressure classes are in the dimension tables; the governing standards are summarised on the standards reference.
Related
Specified alongside this
Components that commonly appear with it on the same run, and the rest of the buttweld fittings range.
Used on the same lineLong Stub EndLong-pattern buttweld stub ends to ASME B16.9 for lap joint flange assemblies, in carbon and stainless steel, with dimension tables by class.View specifications
Used on the same lineShort Stub EndShort-pattern buttweld stub ends to MSS SP-43, Type A for lap joint and Type B for slip-on flanges, in carbon and stainless steel.View specifications
Used on the same lineButtweld CollarButtweld collars for connecting pipes in a piping system, in carbon, stainless and alloy steel.View specifications
Used on the same line90° Elbow (LR & SR)Buttweld 90° elbows in long and short radius to ASME B16.9, in carbon, stainless and alloy steel, with dimension tables by material and class.View specifications
Same range45° ElbowLong-radius 45° buttweld elbows to ASME B16.9, 1/2″ to 72″, Schedule 10 to XXS, in carbon, stainless and alloy steel.View specifications
Same range180° Return Bend (LR & SR)180° buttweld return bends in long and short radius to ASME B16.9, in stainless, carbon and alloy steel, with dimension tables by material.View specifications
Where it is specified
Industries using this component
Sectors that commonly specify the End Cap, and what else they take from us.
- RefineriesButtweld fittings, flanges and fabricated spools in carbon and alloy steel for crude, product and utility service.View sector
- Petrochemical PlantsDuplex, super duplex and stainless fittings and flanges for corrosive and high-pressure process service.View sector
- Power PlantsAlloy steel buttweld and forged fittings for high-temperature steam, feedwater and condensate circuits.View sector
Enquiries
Need a quotation for the End Cap?
Send sizes, grades, quantities and the standard the component is specified to, and a sales engineer will come back with availability and pricing. Dimensions and schedules are in the Technical Catalog.