Pipe Fittings-types of pipe fittings(steel /pipe connection)


Pipe Fittings

Pipe fittings is a component that connects segments in a series, offset, multiport, or installation configuration.Carbon steel Pipe fittings come in a variety of shapes and sizes and are composed of a variety of materials. Pipe joints, elbows, tees, sleeves, flanges, diaphragm pipe fittings, reducers, valves, and so on are all examples of steel pipe fittings.

  Pipe fittings are a type of pipe system. Steel pipe fitings, steel pipe, pipe fittings, flanges, bolts and nuts, washers, valves, and pressure-bearing elements of other piping components comprise the entire piping system.

Why choose tuspipe?


Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality line pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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Types of Pipe Fittings

A pipe nipple is a short length of pipe with male threads on each end. It is one of the most commonly used pieces of pipe fittings, as it can be used to connect two pipes or hoses of different diameters. Nipples are also available with different types of threading, such as NPT or BSPP. They are also available in a variety of lengths, from 1/8″ to 6″.

A pipe coupling is a device used to connect two sections of pipe together. There are many types of pipe coupling, each designed for a specific purpose. For example, some couplings are intended to be used with threaded pipe, while others are designed for use with a non-threaded pipe. Couplings can also be used to connect pipes of different diameters. In most cases, pipe coupling is installed by threading it onto the end of the pipe. Once installed, the coupling provides a watertight seal that prevents leaks.

A pipe flange is a type of pipe fitting used to join two sections of pipe or tubing together. There are several different types of pipe flanges, including slip on, threaded, lap joint, weld neck, and socket weld. Pipe flanges are an essential component of many plumbing and piping systems. When choosing a pipe flange, it’s important to consider the type of connection you need, the pressure(pressure pipe fittings)  and temperature ratings, and the material compatibility.

A pipe elbow is a fitting that is installed between two lengths of pipe or tubing to allow a change in direction, usually at a 45° or 90° angle. Elbows are also available in other angles, as well as with radius bends. Most elbows are available in weld-on, threaded, and slip-on versions. Installation takes place by welding, screwing, or simply push-fitting the ends of the pipes or tubing into the elbow. 

A pipe reducer is a device used to connect two pipes of different diameters. The most common type of reducer is a concentric reducer, which consists of two cones with their bases joined together. Reducers are typically used to change the connection from one pipe size to another. However, they can also be used to increase or decrease the flow rate of a fluid. Reducers are usually installed at the end of a section of pipe and are secured with bolts or welds. When choosing a reducer, it is important to consider the maximum pressure and temperature that the device can withstand.

A pipe cap is a type of fitting that is used to protect the end of a pipe. It may be threaded, beveled, or grooved in order to create a seal. Pipe caps are typically used in conjunction with another type of fitting, such as a reducer, in order to protect the threads or connection point. In some cases, a pipe cap may also be used to protect the interior of the pipe from debris or other damage.

A pipe tee is a three-way fittings that connects three pipes in a fluid system. The three pipes coming into the tee can be of different diameters, and the three pipes leaving the tee can also be of different diameters. The three pipes can flow in the same direction or in different directions. The shape of a pipe tee allows for the three pipes to connect at right angles to each other. A pipe tee is used when a fluid needs to be directed in two different directions, or when two different fluids need to be mixed together.

Coating for Pipe Fittings

- Varnish Coating

Varnish coating significantly enhances the lifespan and reliability of pipe fittings. Applied in either black or red paint, it provides basic protection for plain carbon pipe fittings. However, it’s vulnerable to corrosion in damp or humid conditions due to its lack of robust protective attributes. Despite this, varnish coating aids in maintaining flow consistency and preventing contamination, crucial in industries like food and water. To enhance durability, an additional protective layer can be applied, shielding the pipe fittings from external rust and corrosion.

- Zinc Coating

Zinc coating is achieved by immersing a steel workpiece in molten zinc at about 450°C, resulting in a layered structure of zinc and iron. As the workpiece cools, varying zinc-iron ratio alloy layers form on the surface, enhancing its durability over time. This process initiates at temperatures above 200°C, with the zinc infiltrating the ironwork piece’s surface. The interaction creates a sturdy, corrosion-resistant coating, extending the pipe’s lifespan and usability.

- Epxoy Coating

Epoxy or FPE coating is a high-performance solution for pipe fittings, conforming to all industrial coating standards. It’s a heat-curable, thermosetting epoxy powder offering robust corrosion resistance. Using epoxy resin as the primary film-forming substance, it comes in various types, each with unique properties. Categories include solvent-based, solvent-free, and aqueous epoxy coatings. Despite its potential to become powdery and lose luster when weather-exposed, its superb chemical resistance, thermal stability, electrical insulation, and high adhesion make it ideal for sectors like construction, automotive, and shipbuilding. It’s especially useful as a primer due to its unique characteristics.

Connection Types of Pipe Fittings

- Butt Weld Fittings

This is a type of weld that is used to bind two or more pieces together. Alternatively, it refers to the process of welding two or more parts together, which includes the weld, the fusion zone, and the heat impacted zone. A high-temperature heat source is used to generate the welded connection in fusion welding. The weld metal, the fusion zone, the heat impacted zone, and the base metal make up the welded connection. The temperature and heat concentration of the heat source used in various welding methods vary. As a result, the size of the heat-affected zone and the microstructure of the welded connection, as well as the quality of the joint, vary. Furthermore, the mechanical protective benefits of various welding methods vary. As a result, weld metal purity, or the concentration of harmful contaminants in the weld, will vary, as will weld performance.

- Socket Weld Fittings

Socket welded pipe fittings extend the pipe into the valve body for welding. After forming, the shape is similar to that of an internal thread connection. Carbon steel tubing with a diameter of less than 2″ is used for socket welding. Inserting the pipe into the socket of the pipe fitting, reaching the socket placement stage, and then welding an argon protective fusion ring along the contact between the socket end of the pipe fitting and the pipe’s outer wall are the specific connection methods. During the welding operation, there was no use of welding wire (replaced by the socket end edge of the pipe fitting). It’s linked to a specific sort of welding. Pipe connection method with “no joint connection.”

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