150 lb Stainless Steel Cast Unions
150 lb Stainless Steel Cast Unions
The product table below lists 304 and 316 stainless steel 150 lb cast unions, threaded (NPT) from 1/8" to 4" and socket weld from 1/4" to 4". Dimension charts follow the table.
Get a price: the product table below lists prices; for a size, end connection or alloy that is not listed, call (800) 282-9694 or send us a message.
Our threaded 304 and 316 150 lb stainless steel cast unions are of high quality and corrosion resistant for industrial applications.Pressure: Class 150
End Connections: Threaded - Socket Weld
Alloys: Aluminum - Carbon - Stainless
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Size | Product Type | Reducing | Pressure | End Type | Grade | Price | Quantity | ||
|---|---|---|---|---|---|---|---|---|---|
| 1 1/4 | Union | 150# | Threaded | 316 Stainless | $40.84 | | |||
| 1 1/2 | Union | 150# | Socket Weld | 304 Stainless | $46.21 | | |||
| 1 1/2 | Union | 150# | Threaded | 304 Stainless | $40.73 | | |||
| 1 1/2 | Union | 150# | Socket Weld | 316 Stainless | $52.64 | | |||
| 1 1/2 | Union | 150# | Threaded | 316 Stainless | $46.40 | | |||
| 2 | Union | 150# | Threaded | 316 Stainless | $55.33 | | |||
| 2 | Union | 150# | Socket Weld | 304 Stainless | $55.34 | | |||
| 2 | Union | 150# | Socket Weld | 316 Stainless | $62.71 | | |||
| 2 | Union | 150# | Threaded | 304 Stainless | $48.80 | | |||
| 2 1/2 | Union | 150# | Socket Weld | 316 Stainless | $161.22 | | |||
| 2 1/2 | Union | 150# | Threaded | 304 Stainless | $132.12 | | |||
| 2 1/2 | Union | 150# | Threaded | 316 Stainless | $142.15 | | |||
| 2 1/2 | Union | 150# | Socket Weld | 304 Stainless | $149.87 | | |||
| 3 | Union | 150# | Threaded | 316 Stainless | $197.64 | | |||
| 3 | Union | 150# | Socket Weld | 304 Stainless | $188.69 | | |||
| 3 | Union | 150# | Socket Weld | 316 Stainless | $224.16 | | |||
| 3 | Union | 150# | Threaded | 304 Stainless | $166.38 | | |||
| 4 | Union | 150# | Socket Weld | 316 Stainless | $381.89 | | |||
| 4 | Union | 150# | Threaded | 304 Stainless | $270.05 | | |||
| 4 | Union | 150# | Socket Weld | 304 Stainless | $306.29 | | |||
| 4 | Union | 150# | Threaded | 316 Stainless | $336.70 | |
Product Info
We carry an extensive inventory of 150 lb stainless steel cast unions and stainless steel socket weld unions in many grades and multiple sizes. We can accommodate any need with our wide-ranging and hard to find sizes. View our stainless steel products line card.Dimensions
Dimensions in inches, from our data sheet. The column letters are the ones on the drawing.
Threaded (NPT) items
| Size | A | A1 | H | S1 | S2 |
|---|---|---|---|---|---|
| 1/8" | 1.46 | 0.47 | 0.59 | 0.71 | 1.14 |
| 1/4" | 1.46 | 0.47 | 0.59 | 0.71 | 1.14 |
| 3/8" | 1.54 | 0.47 | 0.63 | 0.91 | 1.42 |
| 1/2" | 1.61 | 0.51 | 0.59 | 1.06 | 1.61 |
| 3/4" | 1.65 | 0.63 | 0.63 | 1.26 | 1.93 |
| 1" | 2.01 | 0.67 | 0.71 | 1.61 | 2.28 |
| 1-1/4" | 2.05 | 0.63 | 0.83 | 1.97 | 2.68 |
| 1-1/2" | 2.20 | 0.71 | 0.87 | 2.20 | 3.03 |
| 2" | 2.36 | 0.71 | 0.98 | 2.72 | 3.62 |
| 2-1/2" | 2.95 | 1.02 | 0.98 | 3.35 | 4.29 |
| 3" | 3.50 | 1.18 | 1.14 | 3.90 | 4.92 |
| 4" | 3.90 | 1.26 | 1.34 | 4.92 | 6.14 |
Socket weld items: dimensions from our heavy pattern (MSS SP-114) data sheet
Each socket weld item's product page links our heavy pattern (MSS SP-114) data sheet, so that sheet's chart is shown here. Socket weld items are sold from 1/4"; the sheet also lists 1/8". This chart uses its own drawing's letters, so a letter can stand for a different dimension than in the threaded chart. SB and SD are on the socket weld end drawing; the other letters are on the thread end drawing. C is marked MIN. C on the drawing.
| Size | A | B | C | H | S | SB | SD |
|---|---|---|---|---|---|---|---|
| 1/8" | 0.34 | 1.14 | 1.26 | 0.59 | 0.71 | 0.43 | 0.39 |
| 1/4" | 0.43 | 1.14 | 1.44 | 0.59 | 0.71 | 0.56 | 0.39 |
| 3/8" | 0.52 | 1.42 | 1.61 | 0.59 | 0.89 | 0.69 | 0.39 |
| 1/2" | 0.57 | 1.61 | 1.72 | 0.59 | 1.06 | 0.85 | 0.39 |
| 3/4" | 0.67 | 1.93 | 1.94 | 0.61 | 1.26 | 1.07 | 0.51 |
| 1" | 0.68 | 2.28 | 2.06 | 0.71 | 1.59 | 1.33 | 0.51 |
| 1-1/4" | 0.72 | 2.67 | 2.26 | 0.84 | 1.97 | 1.68 | 0.51 |
| 1-1/2" | 0.78 | 3.02 | 2.41 | 0.87 | 2.20 | 1.92 | 0.51 |
| 2" | 0.89 | 3.60 | 2.75 | 0.98 | 2.72 | 2.41 | 0.63 |
| 2-1/2" | 1.11 | 4.29 | 3.22 | 0.98 | 3.36 | 2.91 | 0.63 |
| 3" | 1.18 | 4.92 | 3.50 | 1.15 | 3.94 | 3.54 | 0.63 |
| 4" | 1.26 | 6.14 | 3.85 | 1.35 | 5.00 | 4.55 | 0.75 |
Standard Specifications
Unions generally meet ASA B16.3 and pipe threads conform to ASA B2.1 standard for manufacturing. View the standard specifications chart.Stainless Steel Grades
View the various grades of stainless steel.Reference Catalog
View thousands of stainless steel pipe and tubing products including our 150# unions and various custom fabrication services Shaw Stainless offers. This Reference Catalog identifies stainless steel pipe unions and other stainless steel pipe fittings with specification charts and illustrations.Additional Info
A union is a pipe fitting designed for an easy connection and disconnection for future pipe maintenance and replacement. It is similar to the coupling but a coupling requires more work to disconnect and remove from the piping system. Unions feature a three-part configuration consisting of a male end, a hex nut and a female end.Frequently Asked Questions
What sizes of 150 lb cast unions do you carry?
The product table on this page lists 304 and 316 stainless steel 150 lb cast unions: threaded (NPT) from 1/8" to 4" and socket weld from 1/4" to 4". For other sizes or alloys, call (800) 282-9694 or send us a message.
How long is a threaded union?
Column A in the threaded chart is the overall length. A 1" threaded union measures 2.01" and a 2" one measures 2.36".
What is a union?
A pipe fitting designed for easy connection and disconnection, for future maintenance and replacement. It has three parts: a male end, a hex nut and a female end. A coupling takes more work to disconnect and remove from the piping system.
Why does this page have two charts?
Threaded and socket weld unions have different data sheets. Each threaded item's product page links our 150 lb threaded (NPT) data sheet, shown in the first chart; each socket weld item's product page links our heavy pattern (MSS SP-114) data sheet, shown in the second chart. Each chart uses the letters of its own drawing.
How do I get a price?
Prices are listed in the product table on this page. For a size, end connection or alloy that is not listed, call (800) 282-9694 or send us a message.