Carbon Steel Butt Weld Caps
A carbon steel butt-weld cap is a dished cap that permanently closes the end of a steel pipe or manifold by butt welding.
It is used on manifold ends, line ends, mains to be extended later and in the fabrication of pressure vessels. It is supplied in 17 sizes from 1/2″ to 20″.
Main Applications
- Manifold and distributor ends
- Closing main line ends
- Dead legs and dirt pockets
- Pressure vessel and manifold fabrication
- Fire line ends
- Temporary closure during testing (welded)
Technical Data
| Fitting type | Butt-weld dished cap |
|---|---|
| Material | Carbon steel, grade depending on model |
| Sizes | 1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″, 2 1/2″, 3″, 4″, 5″, 6″, 8″, 10″, 12″, 14″, 16″, 20″ (product range) |
| Wall thickness | Depending on model |
| Connection | Butt weld |
| Removable closure | With a blind flange |
| Surface | Black (depending on model) |
| Working pressure | Depending on wall thickness and material grade |
Material Options
| Part | Carbon steel (standard wall) | Carbon steel (SCH40) | Stainless (AISI 304) |
|---|---|---|---|
| Body | Carbon steel, grade depending on model | Carbon steel, grade depending on model | AISI 304 stainless steel |
| Wall thickness | Pipe series standard wall (depending on model) | SCH40 | Depending on model |
| Surface | Black or oiled (depending on model) | Black or oiled (depending on model) | Uncoated stainless |
| Welding | Stick or TIG/MIG | Stick or TIG/MIG | Stainless electrode / TIG |
| Suitable media | Heating water, fire water, air | Steam, high-pressure lines | Food, chemicals, seawater |
Which material? A butt-weld cap gives a permanent closure; on ends to be opened later a weld neck flange and blind flange should be used together.
Advantages
Permanent and Tight
- Becomes one piece with the line by welding
Dished Form
- A cap that resists pressure
Large Sizes
- Up to 20″
Suited to Vessel Fabrication
- Manifold and tank ends
Construction and Design Features
- Dished cap body
- Weld end ready for butt welding
- Size matching the pipe outside diameter
- Carbon steel
Send the cap size, wall thickness and quantity; we will confirm the suitable butt-weld cap from stock.
How to Choose?
- Measure the pipe sizeDetermine the outside diameter of the pipe to close.
- Assess permanenceIf the end will be opened, use a blind flange instead of a cap.
- Match the wall thicknessChoose a cap suited to the pipe wall.
- Check the weld endPrepare the weld ends of pipe and cap.
Complementary Products
Why ORFA?
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Details →Get a quote for your project
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