Pipe Union Fitting : How to Select Pipe Union Fitting : Types, Advantages & Disadvantages of Pipe Union Fitting

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Pipe union fittings are used in a plumbing system. It creates plumbing comfortable for connecting and disconnecting pipes without employing complex tools or extensive pipe cutting. Pipes are generally made of brass, stainless steel, or galvanized iron.

In a few points, plastics like ABS or PVC are also employed to create pipes for union fittings. These union fittings come in various sizes to accommodate various pipe diameters. Two different styles of pipe union fittings are available: threaded and slip-on.

Threaded fittings must be tightened with a wrench, while Slip-on fittings are installed by hand. Union fitting is utilized for Plumbing, HVAC, irrigation, fire sprinkler systems, industrial applications, etc.





  1. How to Select Pipe Union Fitting?  

To select a pipe union fitting, you need to consider the following factors:


a. Material:

The materials employed in the pipe fitting should be suitable for the pipe type.


b. Size:

The diameter of the pipes should fit the size of the pipe union fitting to be joined.

The type of union fitting should be chosen depending on the ease of installation and the desired level of security, whether threaded or slip-on.





  2. Tips for Installing Pipe Union Fittings  

Pipe fitting is a flexible and dependable method. They provide a reliable, leak-free connection and are simple to install.

The material, size, type, and application should be observed while selecting union fittings for best results.

a. The pipe must be clean and debris-free before installing this union fitting.

b. Apply thread sealant:

Thread sealant should be applied to the threads of the pipe union fitting to prevent leakage.

c. Fitting, tighten it. The pipe union fitting should be tightened firmly and not too tightly.

d. To check the running water through the system should be used to check joints for leaks.





  3. Types of Pipe Union Fitting  

The types of pipe union fitting are as follows:

a. Black pipe union fitting

b. CPVC pipe fitting

c. Galvanized pipe union fitting

d. Hydraulic union pipe fitting

e. Male union pipe fitting

f. Stainless union pipe fitting

g. ABS union pipe fitting.


a. Black Pipe Union Fittings

Black malleable iron is employed to construct black pipe union fittings. They are usually employed in gas supply lines. Due to their high durability and opposition to corrosion, they are perfect for outdoor uses.

The halves of these fittings are screwed together or opened with the help of a wrench. The threaded design gives guarantee a tight, leak-free connection.


Black Pipe Union Fittings


b. CPVC Pipe Fitting

The most known uses for CPVC pipes are hot and cold water supply and union fittings for chlorinated polyvinyl chloride (CPVC) pipes.

To construct a solid and dependable connection, the slip-on design of these fittings is solvent cemented. Union fittings produced by CPVC are effortless to install and provide a solid joint that can handle high pressure and temperature.


CPVC Pipe Fitting


c. Galvanized Pipe Union Fitting

Galvanized union fittings are constructed from galvanized steel employed for water supply lines. A zinc layer is painted over a fitting during galvanization to deliver excellent corrosion resistance.

A wrench and threaded connection should be required to fix these fittings. Galvanized pipe union fittings are employed in older plumbing systems, but it is satisfied due to problems that zinc can leach into the water supply.


Galvanized Pipe Union Fitting


d. Hydraulic Union Pipe Fitting

Hydraulic union fittings are specially constructed for function at high-pressure and hydraulic systems. These are constructed of steel or brass and are famous for their strength and leak opposition.

For making an assured joint to hold and fulfill the demand of a hydraulic system, threaded or compression connections are employed.


Hydraulic Union Pipe Fitting


e. Male Union Pipe Fitting

External threads on both edges are the male union pipe fitting, an instance of a union fitting. This design effortlessly combines with other fittings or parts with corresponding female threads.

Male union fittings are usually employed when a momentary or detachable connection is needed.


Male Union Pipe Fitting


f. Stainless Union Pipe Fitting

Because of their outstanding durability and resistance to corrosion, Union pipe fittings are Popular. These are constructed of stainless steel.

These fittings are employed in food processing, pharmaceutical, Marine Applications, etc. This type of fitting arrives in different sizes and configurations that serve different demands and delivers a trustworthy and leak-free connection.


Stainless Union Pipe Fitting


g. ABS Union Pipe Fitting

The pipe usually employed in drain, waste, and vent systems is compatible with ABS (Acrylonitrile Butadiene Styrene) union pipe fittings.

A slip-on design makes a robust and long-lasting connection employing ABS solvent cement. ABS Union Fittings deliver a simple solution for connecting and disconnecting pipes in drainage systems.


ABS Union Pipe Fitting





  4. Advantages of Union Pipe  

The advantages of Union pipe are as follows:

a. To deliver a leak-proof disconnection point in any piping approach.

b. Employed for placing metering and regulating devices into any plumbing system.

c. It can join the piping system to vessels.

d. It can join two pipes of various sizes jointly.

e. It can efficiently remove the joint between two pipes.

f. Very effortless to install.





  5. Disadvantages of Union Pipe  

The disadvantages of Union Pipe are as follows:

a.  High chance of rusting or breakdown.

b. Unions are more expensive than pipe couplings.



  6. References  

1. Content Filter & Authenticity Checking Team, Dream Civil International

(Our team checks every content & detail to maintain quality.)




Read Also: Ferrock in Construction


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