ASC
150# Stainless Steel Union
- SKU:
- S3114U & S3116U
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Stainless Steel Union
SCI Heavy Pattern 150# Stainless Steel Unions provide a threaded connection that allows two compatible piping sections to be joined while also providing a convenient point for future disassembly.
Available in 304 and 316 stainless steel, these cast heavy-pattern unions feature female NPT connections and a three-piece union design for compatible industrial, agricultural, construction, petroleum transfer, and process piping systems.
Product Highlights
- SCI Heavy Pattern Class 150 fitting
- 304 and 316 stainless steel options
- Female NPT threaded connections
- Serviceable union configuration
- Heavy-pattern cast construction
- Allows piping disassembly
Technical Specifications
| Product Type | Stainless Steel Threaded Union |
|---|---|
| Brand | ASC / SCI |
| Figure | S3114U / S3116U |
| Pressure Class | Class 150 |
| Material Options | 304 Stainless Steel / 316 Stainless Steel |
| Casting Grades | ASTM A351 CF8 / CF8M |
| Construction | Cast Stainless Steel, Heavy Pattern |
| Connection | Female NPT x Female NPT |
| Thread Standard | ASME B1.20.1 |
| Configuration | Threaded Union |
| Function | Serviceable In-Line Pipe Connection |
Construction Details
SCI Heavy Pattern Class 150 unions are manufactured from cast stainless steel. The 304 stainless steel version uses ASTM A351 Grade CF8 material, while the 316 stainless steel version uses ASTM A351 Grade CF8M.
Female NPT connections allow the union to join compatible male-threaded pipe, nipples, valves, or fittings in a straight piping run.
The union configuration allows connected piping sections to be separated without cutting the pipe, making it useful where future inspection, maintenance, or equipment removal may be required.
Design & Typical Applications
Union Design
- Heavy-pattern cast construction
- Female NPT connections
- Serviceable center connection
- Removable piping joint
- 304 or 316 stainless steel
Typical Applications
- Industrial process piping
- Water and utility systems
- Agricultural piping systems
- Petroleum transfer piping
- Equipment service connections
Installation & Selection Considerations
- Confirm the required pipe size.
- Select the proper stainless grade.
- Use compatible thread sealant.
- Align piping before tightening.
- Avoid excessive tightening torque.
Use the SCI Heavy Pattern 150 Catalog to confirm union figures, stainless steel materials, and threaded fitting information. The pipe chart can help confirm common pipe diameters and wall thicknesses for compatible piping.
Need Help Selecting a 150# Stainless Steel Union?
Need help confirming pipe size, 304 or 316 stainless steel, NPT connection requirements, or service compatibility? The GetPipe.com Team can help you select the correct stainless steel union.
Frequently Asked Questions
What is a 150# stainless steel union used for?
It joins two compatible threaded piping sections while providing a connection that can be separated for service or maintenance.
What figure numbers identify this stainless steel union?
SCI identifies the Heavy Pattern Union as FIG S3114U for 304 stainless steel and FIG S3116U for 316 stainless steel.
What stainless steel grades are available?
The union is available in 304 stainless steel ASTM A351 CF8 and 316 stainless steel ASTM A351 CF8M configurations.
What connections does this union use?
The union uses female NPT threaded connections for joining compatible male-threaded piping components.
What standard applies to the NPT threads?
The NPT threads conform to ASME B1.20.1.
Why use a union instead of a full coupling?
A union can be disconnected without cutting or rotating long sections of connected piping, making future service easier.
Is 150# the same as a 150 PSI working pressure?
No. Class 150 identifies the fitting pressure class and should not be interpreted as a universal 150 PSI working-pressure rating.
What should I confirm before ordering?
Confirm pipe size, stainless steel grade, NPT requirements, process media, and system operating conditions.
Important Ordering & Installation Notes
- Confirm the required pipe size.
- Select 304 or 316 stainless steel.
- Verify service compatibility.
- Use suitable thread sealant.
- Align piping before tightening.
