Just as a chain is no stronger than its weakest link, an A234 WPB piping system is only worth thanks to its connections. It is, therefore, very important to know all the connections well to be able to create (assemble) or modify piping circuits on industrial machines and equipment.

Therefore, you need to know what type of fitting is best suited to the operating conditions of the machine or equipment.

There are three ways to connect the pipes:

• by threading pipes and A234 WP91 fittings;


• by welding ;


• by the assembly (connection) by Carbon Steel Flange.

Threaded connections

Threaded fittings are the most used. They are found on copper, cast iron, steel, and other alloy piping.

Even if the threaded piping can be suitable for all pressures, it is mainly used on small diameter pipes, that is to say, 75 mm and less. It should also be added that the larger the diameter of the pipe, the more difficult it becomes to obtain a good threaded joint.

As for steel pipes, fittings are classified by nominal size, name of the fitting, material from which they are made. The fittings for steel pipe pipelines are supplied in an ordinary model or a beaded model.

Bead fittings are better and more resistant than ordinary models.

The beads, located at ends and above the threaded part, strengthen this part and prevent the WP22 fittings from cracking when tightening on the pipe with conical thread.

When the clamping is too powerful, the taper on the pipe exerts very great pressure on the female part, from where the risk of cracking.

Identification of threaded connections and description

The fittings are classified according to their nominal size, their name, and their material of manufacture. It is, therefore, important to know the main threaded fittings used in pipes, their description, and their use.

Elbows:

Elbows are male or female tubing stainless steel pipe fittings that allow directional changes on the piping.

T-connector:

When a T-bead connector has openings all of the same diameter, and the "arms" of the tee are curved, it is called "panties." If, on the other hand, one of its openings has a smaller diameter to that of others, it is designated by the terms "T-reducer" or "branching"; the two opposite openings are mounted on the main pipe, and the third allows the branch to be connected.

A reducing tee can reduce, as the name suggests, the conduit, but it can also have a reduced diameter outlet. When we want to identify a reducing "T," we always name the secondary output last, even if it is larger. If a "T" has a branch opening with a diameter smaller than that of the main pipe, this fitting is a real reducer. Manufacturers often call it "T" with reduced output.

Muff :

The sleeve is used to connect two sections of pipe. Like other A234 WP11 fittings, these sleeves can be ordinary or beaded. Both ends can be threaded on the right. They can also be supplied with one end on the left and another on the right.