What is a water joint?

The entry of water into a new construction requires several joints.

A water joint is any device or procedure used to facilitate the joining of water pipes or the addition of auxiliary equipment while preserving the integrity and continuity of the pipe circuit. Water pipe joints can be permanent or removable, depending on the application and the type of pipe involved. These gaskets can be rigid or flexible or even include bellows-type expansion elements to provide increases in water pressure. Water joints may not include external parts and rely on welding, brazing or welded pipes or fittings alone or consist of separate joining elements. Water joints must be able to withstand the same pressure as the rest of the pipe circuit without leaking or experiencing mechanical failure.

Water welded joints are typically used on small copper pipes.

Water piping systems are typically composed of many separate sections of piping and various pieces of ancillary equipment such as valves, pressure compensating bellows, flow meters, backflow protectors, and access port fittings. The average water pipe installation will also change direction or elevation frequently and will have many branches, divisions, or extensions along its route. All these deviations and additions require a watertight joint between different sections of pipe, fittings and external equipment. The type of joint used depends on several factors. This includes pipe size, pipe material, system pressure, and whether or not the joint or fitting will require periodic removal or maintenance.

There are several different types of water joints, each with its own benefits and specific area of ​​application. The two main classifications of water pipe joints are permanent and removable. Permanent water joints include soldered, brazed and soldered joints and are generally used on smaller copper water pipes and very large steel distribution conduits. The welded water joint on large feed pipes is typically a part of a pipe section prefabrication system and is usually performed off-site prior to installation. Steel water pipes can, however, be welded in-situ for repairs or additions to the system.

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Smaller copper pipe on-site systems are often joined by brazing or welding pipes and fittings. If performed correctly, a welded, brazed or brazed water joint is often the strongest and most resilient of all joints. Removable gaskets typically consist of flanges, shell and two-part compression fittings. A water flange joint consists of two similar disks that are placed at the ends of the pipes to be joined. A packing element is introduced between the two and they are bolted together. This pulls the two flanges tightly together, thus forming a tight joint.

Compression and shell joints are typically two-part connections with internal compression seals. One half is located at each end of the tube and is screwed together, thus compressing the sealing element and forming a watertight joint. This type of gasket is quick to replace if the seals wear out or become damaged and allows easy extension of the pipe circuit or the inclusion of other accessories. Single element single sleeve joints are also often used in steel pipe and consist of a single threaded sleeve sealed with hemp wire or PTFE tape. The most important defining characteristic of all water joints is their ability to carry system pressure without leaking or allowing contaminants and air to enter.

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