Pipe Fitting Selection Guide

Pipe fittings are available in various shapes, sizes and materials. Used to connect pipes of different lengths and sizes, these pipe fittings and flanges should make the right connections. Pipe and pipe-fittings are produced from a various materials for the transport of wide variety of solids and fluids. The wrong pipe fittings can lead to many problems like:

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• leaks
• unwanted flow restrictions and
• extra cost

The proper pipe fittings and flanges let your equipment do the work that you intend it to do. The various types of pipe fittings include adapters, bulkhead fittings, plugs, rigid couplings, flexible couplings, 90 degree elbows, 45 degree elbows, reducing elbows, flanges, nipples, concentric reducers, eccentric reducers, side outlet tees, standard tees, reducing tees, bullhead tees, unions, standard wyes, reducing wyes and many more. You should select the right fitting for your application among the wide range of fitting types and sizes offered.
Common points to consider:
The integrity of any fitting for proper functioning depends upon the following:

• Selection of correct components or fittings appropriate for the application
• Careful preparation and cleaning
• Careful installation and assembly
• Correct tightening and loading

Selecting Your Pipe Fittings:
The points to consider are as follows:

• Consider the Tubing Used: For instance, barbed fittings work better in flexible tubing while compression fittings work best with rigid tubing.
• Determine Material Compatibility: Material selection plays a vital role in the proper working of fittings. There are certain fluids which are not compatible with fitting material and these fittings cause leakage or system damage. It is very essential to check the material compatibility of your fluid with any chemicals.
• Check Temperature and Pressure Conditions: Appropriate temperature and pressure ratings are needed for proper operating conditions. It is necessary to know whether the fittings are capable of performing at their maximum temperature and maximum pressure ratings because most fittings cannot perform both the task simultaneously.

Some popular fitting types:

Barbed Fittings:

They slide into soft tubing. For low-pressure installations, tubing elasticity holds the tubing onto the fitting.

They slide into soft tubing. For low-pressure installations, tubing elasticity holds the tubing onto the fitting.

Threaded Pipe Fittings:

These are the most commonly used fittings based on certain standards. For instance, there are threaded fittings of pipes in BSP (British Standard Pipe), NPT (National Pipe Taper), UNF (Unified Fine Thread) sizes for permanent, high-pressure pipe connections.

These are the most commonly used fittings based on certain standards. For instance, there are threaded fittings of pipes in BSP (British Standard Pipe), NPT (National Pipe Taper), UNF (Unified Fine Thread) sizes for permanent, high-pressure pipe connections.

Cam Fittings:

They are considered to be quick-disconnecting fittings which are used with pipes and hoses. For instance, you can connect a female coupler to a male adapter and for a secure connection, pull down the arms. These fittings are capable of withstanding high-pressure applications.

They are considered to be quick-disconnecting fittings which are used with pipes and hoses. For instance, you can connect a female coupler to a male adapter and for a secure connection, pull down the arms. These fittings are capable of withstanding high-pressure applications.

Quick Disconnect Fittings:

These fittings make and break tubing connections without separating tubing from fitting.

These fittings make and break tubing connections without separating tubing from fitting.

Chromatography Fittings:

These fittings are designed for HPLC and other high-pressure applications and they can withstand pressures as high as 1000 psi.

These fittings are designed for HPLC and other high-pressure applications and they can withstand pressures as high as 1000 psi.

Compression Fittings:

These fittings have a nut that compresses rigid tubing against fitting body and are mainly used for high-pressure applications.

These fittings have a nut that compresses rigid tubing against fitting body and are mainly used for high-pressure applications.

Pipe Thread Sizes:
This is a very important consideration for any pipe fitting. All pipes were manufactured with specification of a standardized outside diameter (OD) and wall thickness which in turn implies that the nominal pipe size is approximately equal to the inside diameter (ID). Nowadays, various thread configurations are used. We give below an example of British Standard Pipe (BSP) fittings for connecting systems that use both NPT and BSP thread configurations. The table shows a comparison of these two thread styles.

Size

Threads per inch

 

NPT

BSP

1/8" 27 28 1/4" 18 19 3/8" 18 19 1/2" 14 14 3/4" 14 14

To sum up: Selection criteria for buyers:

• Materials
• Pressure Ratings
• Design and operation
• Safety information
• Temperature

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Additional resources:
20 inch carbon steel 45 degree weld on elbow Buyer's assistance:
Before purchasing pipe fittings and flanges, certain questions need to be answered for that particular pipe fitting and the manufacturer who is manufacturing that particular fitting. Some of these questions are as follows:

• Can it handle pressure?
• Can it handle high temperature?
• Does it have proven long-term performance?
• Are the joints or seals reliable?
• Can it be fitted properly?
• Does it have confidence of manufacturers?
• Can it withstand outdoor storage and ultraviolet rays?
• Can it resist punctures and abrasion?
• Does it have widespread approval and acceptance from inspectors and engineers?
• Does it have quality and value?

The more the number of “YES”, the better is your product.
Understanding Diamond Blades

The proper pipe fittings and flanges let your equipment do the work that you intend it to do. The various types of pipe fittings include adapters, bulkhead fittings, plugs, rigid couplings, flexible couplings, 90 degree elbows, 45 degree elbows, reducing elbows, flanges, nipples, concentric reducers, eccentric reducers, side outlet tees, standard tees, reducing tees, bullhead tees, unions, standard wyes, reducing wyes and many more. You should select the right fitting for your application among the wide range of fitting types and sizes offered.The integrity of any fitting for proper functioning depends upon the following:The points to consider are as follows:This is a very important consideration for any pipe fitting. All pipes were manufactured with specification of a standardized outside diameter (OD) and wall thickness which in turn implies that the nominal pipe size is approximately equal to the inside diameter (ID). Nowadays, various thread configurations are used. We give below an example of British Standard Pipe (BSP) fittings for connecting systems that use both NPT and BSP thread configurations. The table shows a comparison of these two thread styles.Before purchasing pipe fittings and flanges, certain questions need to be answered for that particular pipe fitting and the manufacturer who is manufacturing that particular fitting. Some of these questions are as follows:The more the number of “YES”, the better is your product.

PEX pipes differ from traditional rigid pipes in one obvious way: They’re flexible. This makes it easier to snake them to different areas of a home. Using PEX piping may require running more pipe, but it also involves fewer fittings. PEX crimp tools offer a simple way to make these flexible fittings more secure and watertight.

Here are a few other advantages of PEX:

• It’s quieter than rigid piping.

• It has a smooth interior that resists scale buildup and corrosion, which can affect pipe flow over time.
• It’s freeze-break resistant, although not freeze-proof. PEX tools, such as specialty expansion kits, will enhance this benefit by absorbing dimensional changes caused by thermal expansions/contractions.
• PEX systems have appealing installation costs compared to rigid materials.
• PEX piping is often used in green buildings, installed either as a remote manifold or plumbing system.

PEX pipe and crimp fittings, with all their benefits, do have a drawback: Because UV exposure causes a reaction with polyethylene, it isn’t suitable for outdoor use. The maximum level of UV exposure is typically no more than 60 days, but this varies by manufacturer. Using PEX for underground water supplies isn’t ideal, even if UV exposure is decreased.

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