OEM manufacturer ASME B16.11
Socket Weld Caps — ASME B16.11
A socket weld cap closes the end of a small-bore pipe with a single fillet weld. Teshi Group manufactures socket weld caps to ASME B16.11 in Class 3000 and 6000, in carbon, low-temperature, alloy and stainless steels.
Also called: SW cap, forged socket weld cap, socket welding end cap, pipe cap socket weld
What is a Socket Weld Cap?
A socket weld cap is a forged fitting with one socket and a solid end. The pipe is inserted into the socket and fillet welded, sealing the line permanently. Caps are used to close drains, vents, dead legs and future connections on small-bore lines. Where the end must be opened later, a threaded cap or plug is used instead. Caps are ordered by size, class and material to match the pipe.
Key features
- Forged, machined socket per ASME B16.11
- Class 3000 and 6000
- Permanent closure with one fillet weld
- Flat or slightly domed end
Specification
| Supply | OEM manufacturer — Teshi Group, India, India |
|---|---|
| Standard | ASME B16.11 |
| Pressure class | Class 3000 and 6000 (Class 9000 on enquiry) |
| Pipe compatibility | Class 3000 → Sch 80, Class 6000 → Sch 160 pipe |
| Size range | NPS ⅛"–4" (DN 6–100) per ASME B16.11 |
| Materials — carbon & low-temp steel | ASTM A105; ASTM A350 LF2 Cl.1 |
| Materials — alloy steel | ASTM A182 F11 Cl.2, F22 Cl.3, F5, F9, F91 |
| Materials — stainless & duplex | ASTM A182 F304, F304L, F316, F316L, F321; F51, F53 duplex |
| Testing | Visual, dimensional and thread/socket gauge inspection; PMI on alloy and stainless grades; hardness check; MPI/DPT when specified |
| Documents | EN 10204 3.1 mill test certificate; 3.2 / third-party inspection when the order specifies; dimensional inspection report; IBR certification for boiler/steam service when specified |
Applications
- Drain and vent ends
- Dead legs and future tie-ins
- Instrument line ends
- Small-bore utility lines
FAQ
Socket Weld Cap: common questions
When do I use a socket weld cap instead of a threaded cap?
Use a socket weld cap where the end will stay closed and a seal-welded or leak-tight joint is required. Use a threaded cap or plug where the end must be opened.
Which class should I choose?
Choose Class 3000 socket weld caps for Sch 80 pipe and Class 6000 caps for Sch 160 pipe, in a material equivalent to the pipe, as per your piping specification.
Are caps hydrotested?
ASME B16.11 does not require a hydrostatic test of individual fittings. Caps are normally tested with the piping system, or individually when the order specifies it.
What certificates are provided?
An EN 10204 3.1 mill test certificate is provided as standard. EN 10204 3.2 or third-party inspection and IBR certification are provided when the order specifies them.
Need a size or grade not listed here?
Our engineering team manufactures against your drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
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