ASC
150# Cast Stainless Socket Weld Union 316
- SKU:
- S3716U
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Cast Stainless Socket Weld Union 316
ASC / SCI 150# Cast 316 Stainless Socket Weld Unions provide a serviceable connection between compatible stainless steel socket-weld piping components. The supplied SCI Heavy Pattern 150# Stainless Fittings catalog identifies the 316 stainless version as Figure S3716U – Union.
The union configuration combines socket-weld ends with a separable center connection, allowing installed piping sections or equipment to be disconnected without cutting the adjoining welded pipe.
Product Highlights
- ASC / SCI cast stainless steel fitting
- Figure S3716U
- 316 stainless steel
- 150# configuration
- Socket-weld union configuration
- Socket-weld connections on both ends
- Serviceable center union connection
- Cast stainless steel construction
- 316 stainless castings conform to ASTM A351 ACI Grade CF8M
- CMTRs available upon request
- Designed for compatible stainless steel socket-weld piping systems
Technical Specifications
| Product Type | Cast Stainless Steel Socket Weld Union |
|---|---|
| Brand | ASC / SCI |
| Figure | S3716U |
| Material | 316 Stainless Steel |
| Casting Grade | ASTM A351 ACI Grade CF8M |
| Pressure Class | 150# |
| Configuration | Union |
| Connection Style | Socket Weld x Socket Weld |
| Construction | Cast Stainless Steel |
| Primary Function | Serviceable Connection Between Compatible Socket-Weld Piping Components |
Socket Weld Union Configuration
A socket weld union provides welded piping connections on both ends while incorporating a separable center joint.
The adjoining pipe sections are inserted into the socket ends and welded in place. The center union connection can then be separated when maintenance, equipment removal, or piping access is required.
Confirm that the installation requires a serviceable union rather than a permanent coupling before fabrication.
ASC Figure S3716U Identification
The supplied SCI Heavy Pattern 150# Stainless Fittings catalog identifies the 316 stainless steel Socket Weld Union as Figure S3716U.
The corresponding 304 stainless steel version is identified as Figure S3714U.
No size, dimensional, part-number, packing, or weight tables have been added to this page.
Construction Details
This fitting uses cast 316 stainless steel construction.
The ASC / SCI stainless fitting information identifies 316 stainless castings as conforming to ASTM A351 ACI Grade CF8M.
The cast union body incorporates socket-weld connections at both ends together with a separable center connection for service access.
316 Stainless Steel
This product is the 316 stainless steel version of the ASC / SCI 150# cast socket-weld union family.
The 316 stainless casting designation is identified as ASTM A351 ACI Grade CF8M.
Confirm compatibility between the fitting material, adjoining pipe, process media, welding procedure, and overall system requirements before installation.
Socket Weld Connections
The union uses socket-weld connections on both piping ends.
The adjoining pipe is inserted into each socket before the connection is welded in place.
Proper pipe preparation, insertion, alignment, and welding procedures should be followed for the intended stainless steel piping system.
Serviceable Union Connection
The center section of the union provides a serviceable break point in the piping assembly.
Once the socket-weld ends are installed, the union connection allows the adjoining piping sections or connected equipment to be separated without cutting the welded pipe.
This makes a union useful where future maintenance, inspection, or equipment replacement may be required.
316 vs. 304 Stainless Socket Weld Union
316 Stainless – Figure S3716U
- 316 stainless steel
- ASTM A351 ACI Grade CF8M casting
- Socket-weld connections
- Serviceable center joint
- This GetPipe.com product
304 Stainless – Figure S3714U
- 304 stainless steel
- ASTM A351 ACI Grade CF8 casting
- Same socket-weld union configuration
- Different stainless material grade
- Select according to system material requirements
Socket Weld Union vs. Full Coupling
Socket Weld Union – S3716U
- Socket-weld connection on both ends
- Separable center connection
- Allows future piping disassembly
- Useful where service access is required
- 316 stainless steel
Socket Weld Full Coupling
- Socket-weld connection on both ends
- Permanent one-piece connection
- No separable center joint
- Different installation purpose
- Use where future disassembly is not required
Socket Weld Union vs. Threaded Union
Socket Weld Union
- Pipe inserts into socket ends
- End connections are welded
- Center union remains serviceable
- Permanent attachment to adjoining pipe
- Figure S3716U
Threaded Union
- Uses threaded end connections
- No socket-weld end joints
- Requires compatible mating threads
- Different installation method
- Should not be substituted without confirming system requirements
SCI Stainless Weld Catalog Reference
The supplied SCI Stainless Weld Fittings Catalog is included as an additional stainless fitting reference.
That document covers SCI stainless butt-weld fitting families and provides supporting stainless steel fitting information.
Because this product is a cast socket-weld union, use the supplied ASC 150# Stainless Socket Weld information as the more product-specific reference for Figure S3716U.
Pipe Dimensions & Wall Thickness Reference
The supplied GetPipe.com Common Diameters and Wall Thicknesses PDF is included as a general adjoining-pipe reference.
Use it when checking nominal pipe size, outside diameter, and schedule-related wall-thickness information for compatible piping.
The pipe chart should not be interpreted as providing this union's socket depth, overall union dimensions, center-joint dimensions, or fitting weight.
Applications
The 150# Cast Stainless Socket Weld Union 316 is intended for compatible piping systems requiring a welded stainless steel connection with a serviceable union joint.
Final suitability should be confirmed against 316 stainless steel material requirements, socket-weld compatibility, adjoining pipe, welding requirements, operating conditions, process media, and the need for future piping disassembly.
Installation & Selection Considerations
- Confirm that the installation requires a 150#, 316 stainless steel socket-weld union.
- Verify compatibility between both union sockets and the adjoining pipe.
- Confirm that a serviceable union connection is appropriate for the piping layout.
- Use appropriate pipe preparation, insertion, alignment, and welding procedures.
- Review the supplied ASC Socket Weld information as the product-specific reference, with the SCI stainless weld catalog and pipe chart used as supporting references.
Use the supplied ASC 150# Stainless Socket Weld information to confirm the Figure S3716U 316 stainless steel, 150#, socket-weld union configuration. The SCI Stainless Weld Fittings catalog and pipe chart are also included as supporting stainless fitting and adjoining-pipe references.
Need Help Selecting a Cast Stainless Socket Weld Union?
Need help confirming the correct 316 stainless material, 150# configuration, socket-weld connections, union style, or compatibility with your piping system? The GetPipe.com Team can help you verify the right union before ordering.
Frequently Asked Questions
What ASC / SCI figure identifies this 316 socket-weld union?
The supplied SCI Heavy Pattern catalog identifies the 316 Stainless Socket Weld Union as Figure S3716U.
What material is this fitting?
This product is identified as cast 316 stainless steel.
What ASTM casting grade applies to the 316 version?
The ASC / SCI stainless fitting information identifies 316 stainless castings as ASTM A351 ACI Grade CF8M.
What connection style does this union use?
The fitting uses socket-weld connections on both piping ends.
What is the purpose of a union?
A union provides a separable connection that allows sections of an installed piping system to be disconnected without cutting the adjoining pipe.
How does a socket-weld union work?
The adjoining pipe sections are inserted into the union sockets and welded in place, while the center union connection remains separable.
What is the corresponding 304 stainless version?
The corresponding 304 stainless steel socket-weld union is Figure S3714U.
How is a union different from a full coupling?
A full coupling creates a permanent one-piece connection, while a union includes a separable center joint for future piping disassembly.
Is this a threaded union?
No. This product uses socket-weld piping connections rather than threaded end connections.
How does the 316 version differ from the 304 version?
The primary distinction is the stainless steel material grade. Figure S3716U uses 316 stainless steel with CF8M casting material, while Figure S3714U uses 304 stainless steel with CF8 casting material.
Are size and dimensional tables included on this page?
No. Size, part-number, packing, weight, and dimensional tables are not included unless specifically requested.
Which supplied PDF is the most product-specific?
The ASC 150# Stainless Socket Weld PDF is the most product-specific supplied document for this cast socket-weld union.
What is the SCI Stainless Weld Fittings Catalog used for here?
It is included as an additional stainless fitting reference. Its primary product family is stainless butt-weld fittings rather than this cast socket-weld union.
What does the Pipe Dimensions and Wall Thickness PDF provide?
It provides general adjoining-pipe reference information for nominal pipe size, outside diameter, and schedule-related wall thickness.
What should I verify before installation?
Confirm 316 stainless material, 150# configuration, socket-weld compatibility, adjoining pipe, union orientation, and the appropriate welding procedure.
Important Ordering & Installation Notes
- Product: 150# Cast Stainless Socket Weld Union 316.
- ASC / SCI figure designation: S3716U.
- 316 stainless casting: ASTM A351 ACI Grade CF8M.
- Confirm socket-weld compatibility and that a serviceable union connection is appropriate for the installation.
- Use the ASC 150# Stainless Socket Weld information as the product-specific reference and the other supplied documents as supporting references.
