PEX Fittings – elements of the pipeline, serving to connect its various parts together. Distinguish them from other similar items – flanges, elbows, transitions – is that the fittings connecting the various elements of the pipeline between them by the thread cut into them and the parts of the pipeline. Thread can be cut as part of the internal fittings and pipes, and on the outside. The above compounds of the same elements (flanges, elbows, reducers, etc.) provide the connection pipes to each other by welding, bolts, etc.
Fittings are usually the most widely used at the terminal branches of the pipeline, ie, after entering through the building and posting on this building. They have little control, the most common Elbows (PEX x PEX), Tees (PEX x PEX x PEX), Couplings (PEX x PEX), Plugs (PEX x Stop), PEX x Copper Fitting Adapters, PEX x Male Threaded Adapters, PEX x Female Swivel Adapters. By fittings include: sweat and threaded couplings are designed to connect the various parts of the pipeline between them; corners are used to change the direction of the line, tees and crosses are used for branching of the pipeline; sleeves to connect the already laid pipe; cork stoppers for some branches etc.
One variety of fittings – clutch. It is intended to interconnect two pipes. The simplest coupling consists of a section of pipe on the inner surface of which is threaded to connect the pipes with a sleeve on the outer surface of the pipe is threaded, which is screwed coupling, using a sealant (flax, Fum-tape, etc.). . On the other hand clutch in it screwed the other tube (again with a seal) with the same external thread, as in the first tube. This coupling is simple.
The seal is used almost always for the threaded connections, so in the future, we will not focus on this, and if the connection will be discussed on the thread, then I’ll assume that it uses and the sealant.
In contrast, the transient couplings are serving to move from one control to another. In this case, on the one hand sleeve has a diameter of the pipe included in it, on the other side – outgoing pipe diameter, which differs in magnitude from the first.
If the clutch has a smooth outer surface, such as coupling, made of a segment of pipe, then connect it to the pipes by means of wrench, because otherwise permanently fix it difficult to tighten. There are also couplings, in which the outer surface has protrusions in the form of original edges. In this case, to its junction with the tube, you can use a wrench, since these edges will not give a wrench rotate with the clutch assembly in the pipeline.
Sometimes there are coupling with the outer surface, made as a hex nut.
Another type of fitting a nipple – he’s a barrel of this element, like a clutch, and is mainly used for the same purpose, only the thread he had cut into the outer surface, rather than on the inside, like a sleeve. That is, in its simplest form it represents a segment of pipe with threaded. Bochata are mainly used at the end of any of the branches of the pipeline, when this branch need to complete the installation of a unit, for example., Tap.
Here is an example of the barrel. For example, in some rooms include a water pipe with an external DN20 mm. To her it is necessary to connect the valve, which has a connecting portion in the form of pipes with an inner diameter of 15 mm. Then the optimal design for their connections with each other budetsleduyuschaya. At the pipe DN20 mm screwed adapter with DN20 to DN15, the sleeve of the barrel DN15 DN15 screwed, and this barrel is screwed off. That’s how our tap was connected to a water pipe, part of the room. This valve is one of the ends of branches plumbing included in this building.
Eviction is very similar to the barrel. However, if you look at it closely, one can see that on the one hand carving his cut by significantly longer than the other. Why is this done? The point here is this. Imagine this picture. There are two parts of the pipeline, and she and the other are rigidly fixed. Between them there is a gap. This gap must be eliminated and the pipeline to connect the two parts into one.
The most optimal solution to this problem – is to use the eviction. Its length should be approximately equal to the length of the gap. Short of their side it is connected to the thread with one of the pipes (often with a sleeve) and is fixed there almost firmly, creating only the possibility of slightly provinchivatsya the expulsion. Then, by a long thread on it screwed coupling (this can be done at the outset), the end of eviction is brought right up to the extent possible, the second pipe, and clutch is congealing with eviction and move partly threaded connecting section of the second tube. In this case, to clutch without problems came on the thread of the second tube, eviction may have during this procedure several turning on its axis. Folds of the sleeve nut is often counter to eliminate the potential for some reason it get out during the operation.
Thus, the eviction allows you to connect two parts of the pipeline, which are rigidly fixed in their places, and therefore they can not move, rotate, etc., during assembly line
Area, or polygon, as mentioned above, can change the direction of the pipeline in areas covered by the project. This is actually a clutch, bent at an angle of 90 degrees. Less can be found bent at 90 degrees barrel, also called the corner, only with male thread. The principle of using one and the same. At the end of direct pipeline screwed corner, on the other side of this corner in negovvinchivaetsya pipe, which is the beginning of a new plot line. And so, if the line changes direction more than once.
If at some places the pipeline begins to branch out into several directions, then we can not do without this type of fittings, as tee or cross. Tee, without interrupting the main branch of the pipeline, begins a new. If you need a new branch occasionally disconnected from the core, then immediately after the tee at the beginning of this branch put a device that performs this function (eg, valve).
Plugs or caps are necessary, or for the temporary closure of a branch of the pipeline, for example., With its repair, or for its permanent closure.
Crossings forks forward direction at once into two branches, each of which may in the future again bifurcate with tees or frogs.
All metal fittings are made mostly of steel, cast iron, bronze, brass and other alloys. Steel can be either covered by a corrosion-resistant material, and bare. Anti-corrosion coatings mostly – chromium, zinc, nickel. Coverage with zinc and chromium is more often used when using the fittings in weathering, when undesirable appearance on their surface rust. Nickel coating is more expensive and is used when installing in apartments of various plumbing.