When installing the PEX tubing and fittings use several ways to connect: butt welding on pressurized PEX tubing, often on PEX pipe sewer, ie tube attached to the pipe, and welding is possible with embedded heaters. In another method of welding is as follows: tube, then attached coupling, and it goes the other tube. Method of butt welding practice when connecting to water PEX tubing for gas tubing system and connecting tubing system, joint casings made of PEX, as well as in other cases. When using butt welding PEX tubing are needed and fittings of the same diameter and one brand that is also very important in this type of connection. The characteristic positive side butt welding is that it is very economical method as it does not require some other equipment. Note that when butt welding of PEX tubing and fittings, pipe thickness shall not be less than 5 mm. The air temperature during butt welding can vary from -15 degrees to + 45. Water pipes can be installed by the second method, it provides for fittings with embedded heaters.
At the Omsk plant of pipe insulation “as the company launched production of pipes where the customer can, along with PEX pipe fittings, order and delivery of MHP. Depending on the type of welding installation of PEX tubing and fittings can be produced in two modes: the mechanical mode and automatic mode. Production of fittings can be made to order to provide convenient and comfortable welding, depending on what you are welding. In addition, we can produce PEX pipes and fittings based on drawings provided by you.
PEX fittings
Installation the PEX tubing with PEX fittings
Increase of PEX tubing popularity
Becoming increasingly popular PEX tubing and fittings for water supply systems as used by the utilities, as well as advanced and pipes for gas tubing system, were spread around the globe and stretching in all countries .. High rates of gasification of the country are pushing to increase the already high demand for PEX tubing and all components and accessories.
Demand for PEX tubing connected with a number of advantages over other materials:
1. price for PEX tubing and fittings are much lower and therefore PEX tubing are cheaper, and thus runs the project goes much lower cost compared with steel pipes;
2. in polyethylene tubes removed and the roughness of the passage of transporting natural environments does not cause fouling the inner surface of the pipe;
3. PEX tubing – is a reliable shield against the microorganisms and bacteria, their inner layer of water does not give any harmful impurities;
4. PEX tubing do not corrode and are much longer than counterparts on purpose;
5. so-called “lengthy” PEX tubing (on reels or in coils of up to 450 m) reduces the number of welds are 50-100 times;
6. low thermal conductivity, which have PEX pipes and fittings, reducing heat loss and reduce condensation on the outer surface of the pipe;
7. assembly and export of pipe is very simple, because of lighter weight that can not be said about the steel pipes;
8. PEX tubing are not destroyed by freezing the liquid, as this pipe does not collapse, but increases in diameter, acquiring former size during thawing of the liquid;
9. installation of polyethylene pipe is cheaper and easier.
Crimp PEX fittings in PEX tubing installation
At PEX fittings compression PEX tubing held a special split ferrule, which is compressed when unscrewed, the external threaded portion of PEX fitting long nut. Tighten nut ferrule tightly clasps metal pipe, pressing her inner surface to the surface of the PEX fitting socket. Seal joints provided sealing rings located at both the socket PEX fitting, and inside the clamp nut. The connection of metal pipes with compression PEX fittings – loosely, permits repeated assembly – disassemble of joints.
Each of the PEX fittings described has its advantages and disadvantages. Press PEX fittings are securely connected to the metal-tube, because the connection pipe PEX fitting, achieved an almost one-piece molding. However, mounting press PEX fittings require special tools to crimp – press machines, manual or hydraulic. Work on installing the press PEX fitting requires some experience, bad crimp crimp sleeve can cause an accident PEX plumbing. Installation of compression PEX fittings is carried out by conventional wrenches, movable or carob, a connection can make the installer even with little experience with metal-PEX tubing. However, the connection obtained in this way is often leaky, which leads to leaks in the joints of compression PEX fittings and metal pipes.
Pipes, connections are done with the use of press PEX fittings, thanks to the reliability of the connection can be removed in the channels of the work being done in the walls, that is, possible to hide the installation of PEX plumbing. Connection made by compression PEX fittings require constant monitoring for leaks, so the main area of their application – water pipes, mounted an open way.
The main requirements for PEX fittings: To ensure a reliable connection between a pipe and PEX plumbing fixtures, long-term trouble-free operation, and ease of installation, ultimately decreasing the cost of works on arrangement of PEX plumbing.
PEX Pipes – purpose and dignity
Now widely adopted pipes modern environmentally friendly materials – PEX.
What are the advantages of these Plumbing PEX pipes?
They are simple, quick and clean to install, resistant to acids and alkalis, does not corrode, they can be “zamonolichivat” into the wall, have an absolute tightness of joints, low cost, and for heat resistance superior to any other PEX tubing.
However, pipes made of PEX yield on frost resistance of PEX tubing. Already at a temperature of -5 to -15 * C PEX becomes brittle, so for outdoor water use them can not. PEX pipe and PEX fittings used in residential and industrial buildings for domestic hot and cold water, as well as the device underfloor heating. Because of its smooth inner surface, they have high permeability. PEX fittings are manufactured from special chrome-plated brass pipe PEX fittings from PEX, so they can be easily connected with stainless steel PEX plumbing.
Operating temperature pipe to +95 * C.
Operating pressure for the cold PEX plumbing pipes 1,0 MPa, and the hot – 2,0 MPa.
Life with preservation of the original qualities of 25 years for pipes and PEX fittings and hot water 50 years – for the cold.
Thus, choosing PEX tubing, you get a cost-effective, hygienic, reliable and durable water system.
PEX fittings for copper pipes
PEX fittings – elements of PEX plumbing systems that provide direct or angular connection of separate parts of metal-water and allow the transition between pipes of different diameters. Structurally PEX fittings for metal pipes is a PEX fitting inserted in the pipe and connects with the threaded part of the valves, filters, meters and other PEX plumbing fixtures. The most common types of PEX fittings used in the installation of metal tubes – press PEX fittings, PEX fittings, and compression.
PEX fittings press PEX fittings are mounted in the lumen of metal-press test tube by a metal sleeve, stainless steel, put on the pipe at the junction of pipes and PEX fittings. Tightness of such a connection is provided by O-rings to be placed in concentric grooves on the socket PEX fitting. Press test crimp sleeve press PEX fitting, single operation, if necessary to disassemble the connection, it simply cut off with part of the metal-tube, then put in its place a new press PEX fitting.