Threaded Fittings

Threaded Fittings


A fitting is a device that helps to connect or adapt different types of pipes/tubes in a piping system. They can be utilized to regulate or change the flow characteristics. These components require time, money, and tools to install and form the backbone of the entire system. There are different types of fittings that are produced using a wide range of materials.

Threaded fitting is one of the oldest methods used in joining different valves, flanges, and pipes. These components are used in small pipes of high-pressure requirements. Normally pipes having a diameter of NPS 2 or smaller can be produced using this process.

The components from this range are very sturdy and are designed to be installed permanently. They are a preferred choice in non-critical applications namely domestic water supply, cooling systems, fire protection, etc. The fittings are produced utilizing cast gray/brass, bronze, forged alloy, and carbon steel. They can be availed in pressure classes of 2000, 3000 and 6000.

What is a threaded coupling?

A threaded coupling is a joint in a drill pipe that offers a higher strength than normal threaded connections. The coupling is a short length of a pipe/tube that has a socket that enables them to join two components together. They are mostly used on drill pipes that drill a wide range of wellbores. Also known as tool joints, they help the component to suffice multiple tightening cycles that may previously lead to loosening of the threads during various processes. They are made utilizing steel, aluminum, or titanium and can be availed as small or large diameter sections. It can be welded or screwed as per the piping requirement.

What is the disadvantage of threaded fittings?

Every component has some good points and shortcomings so do this fitting

  • It is not suitable for high-pressure applications.
  • Threads may be corroded after exposure in corrosive environments.
  • They are vulnerable to failures due to stress near the openings.
  • Temperature change may cause leakage within the system.
  • It is labor-intensive.
  • Lower strength in comparison to welded units.

How do you connect threaded pipe fittings?

The products in this range are threaded with a male thread on the interior and correspond to a female thread on the pipe. This follows a simple installation process that has to be tightened until a yanking sound is heard. It is necessary to be cautious to ensure that the element doesn’t damage the existing structure.

Which connector use a threaded coupling?

There is a wide range of connectors that utilize threaded coupling namely tees, elbows, flanges, crosses, unions caps, plugs, valves, etc. They can be assembled for rubber and plastic industrial hoses as well as in domestic applications. The modules can be utilized for different chemical, petrochemical products, etc.

What is the advantage of tapered threads?

Tapered threads are units that taper uniformly on the thread profile and subsequently decrease as they slide down the module. They help in improving the quality of the seals making the entire system leakproof. Furthermore, they have a simple assembly that doesn’t require any flaring or utilization of any sleeves. These modules can be readily availed in a wide range of shapes and sizes.

Can you reuse NPT fittings?

NPT fittings are designed to crush the thread producing a mechanical seal within the system. During this process, the male and female threads are cut to form the seal. This makes the fitting not reusable. If reused then, overtightening of the module is very common which, will lead to leakage.

Are NPT threads self sealing?

The female and male threads in NPT systems wedge together to form a strong sealing. However, they require additional sealants to fill any voids within the system. These sealants completely fill any gaps and make it leakproof.

Can you thread NPT to BSPP?

NPT and BSPP threads are not compatible with each other. The threads of the BSPP units are not tapered but, the female module of NPT is tapered. They may go one or two threads onto each other but, this will not lead to a strong seal.