Pipe fittings: main types and application features

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MesterulManole July 31, 2016Specialization: many years of experience in finishing works of residential and office premises, dachas, country cottages, etc. Hobby: cycling in all its forms

Socket joint of sewer HDPE pipes

Greetings, dear readers. In this review we will talk about connections of various pipes. The topic of the article is relevant, since there is a wide range of pipes on the market, which differ from each other not only in the type of production materials, but also in the method of connection. And the result of the installation of the pipeline as a whole depends on how correctly it is selected.

Main varieties

If there are pipes and you need to combine them with your own hands into a single sealed system, you will need special connecting elements with the appropriate sizes and configuration.

The connecting elements used to build pipelines, according to the type of pipes, are divided into polymer and metal. In this article we will look at what modifications are available on the market for fittings for plastic water supply pipes and for their metal counterparts.

All fittings, regardless of the materials used in their production, are divided into three categories:

• fitting;
• shut-off valves;
• additional accessories.

Let's look at the features of each of these categories in more detail.

Types of fittings

The photo shows types of fittings for plastic water supply and sewerage systems

According to their purpose, fittings are divided into the following types:

• corners and bends - change the direction of pipelines by 45, 90 or 120 degrees.
• collectors and tees - used to install branches from the main line.
• crosses - intended for installing branches in two directions from the main line.
• couplings - used to connect pipes with the same diameter in a straight section.
• adapters (nipples, bends and fittings) are used to connect different pipes in one system.
• plugs (caps, plugs) - used for hermetically sealing the ends of pipes.
• fitting - used to connect rigid water supply with flexible hoses.

According to the material used in production, connecting elements are divided into the following categories:

• Fittings used for metal water pipes can be threaded, crimped, flanged or welded.

Fittings for metal water pipes

Welded versions are equipped with a smooth end that fits into the pipe and is welded to create a tight connection.

No less popular is the threaded connection, which is used on most household systems. The only drawback of such a connection is that it cannot provide residual tightness, and therefore special sealants are used, such as an o-ring, tow, fum tape, etc.

The crimp connection is used less frequently because it requires a special tool.

Important: The compound obtained in this way is not intended for secondary use. However, it provides the maximum level of tightness and reliability.

Flange connections are used in industrial pipelines and are made using bolting.

Connecting elements for the installation of metal-plastic systems

• Fittings for metal-plastic pipes are intended for making collet or collet-threaded connections . The most reliable type of connection on metal-plastic is the use of crimp fittings.

Current methods of joining on metal sheets

Just like crimp fittings for metal pipes, products for crimping metal plastic are intended for one-time use. Therefore, before cutting the pipe for crimping, you need to measure everything accurately so that you do not have to cut off the used fitting and install a new one in its place.

Types of fittings for polypropylene

• Fittings for polypropylene pipes are fittings that are connected to the pipeline by soldering . To carry out soldering, special equipment is used, which heats the seat and the end of the pipe to + 260 °C.

The parts heated to the required temperature are connected, centered and held in the required position until the plastic cools completely. After the plastic has cooled, an almost monolithic sealed and durable connection is obtained, the price of which is low.

Shut-off valves

Main types of shut-off valves

Shut-off valves are fittings for profile pipes and their round analogues, designed to shut off the supply of water or other transported medium.

Modern shut-off valves are presented on the market in the following varieties:

• taps - used in various pipelines, both domestic and industrial;
• valves – used in industrial systems;
• valves (valves) – used in industrial systems;
• dampers (butterfly valves) – used in industrial systems.

Important: When choosing shut-off valves, pay attention to the markings on the product body. The marking contains data on the nominal bore, the nominal pressure, the maximum permissible temperature of the transported medium, the direction of flow and the material used in the manufacture of the fittings.

Additional accessories

Additional accessories for propylene pipes are represented by the following range of products:

• Mounting clips are brackets designed for fastening to hard vertical and horizontal surfaces.

The internal diameter of the product corresponds to the external diameter of the pipes. Thus, the fastener is fixed with a dowel on the wall, and the pipe is inserted into the product and held securely by it.

The advantage of such fasteners is that, despite the reliability of the fixation, the pipeline can be shifted longitudinally.

• Pass-through strips are intended for installation of water mixers. The passage strips eliminate the need for connecting fittings.
• Bends are ready-made parts of a pipeline, produced in a factory.
• Bypasses are devices that allow you to bypass various obstacles along the pipeline path. Structurally, such products are a piece of pipe in the form of an arc with sockets at both ends.
• Linear expansion compensator is a special device designed for use on heating systems built using polypropylene pipes.

Pipeline details

supplies numerous types of polyethylene pipe parts. Such products are necessary for installation, maintaining tightness, connecting shut-off valves and other necessary parts of the structure.

We carry out fast shipment of products from our own warehouse in Moscow. All products are certified and have a high level of quality.

Features of the range

In the company's catalog you will find many types of products, including the following:

• Tees. Necessary for dividing the flow in several directions. They are connected to the pipeline with a guarantee of tightness and maintenance of the design pressure.
• Connection elements. Various rings and adapters are needed to connect pipes and other parts to each other. This way you can even join products with different diameters.
• Parts for contact with shut-off valves. Thanks to them, you can install special regulators, taps and much more.

We also supply manifolds, special adapters and other types of products. There are many types of pipes in the range. They differ in diameter and wall thickness, and are well suited for both hot and cold water supply.

Place a quick order for polyethylene pipes and fittings

provides customers with everything that may be required when installing a pipeline at the selected site.

In Moscow, orders are delivered by the company's own fleet of vehicles. Shipping to the regions is carried out by transport services of the client's choice.

To find out prices and buy pipes and connecting parts made of polyethylene, just leave a request on the website and request a price list. We are ready to answer your questions and provide consultations by phone.

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