Often during installation, the question of compatibility of certain elements of the system arises. The pipeline can consist of pipes of various shapes, diameters and materials. System connection units can be equipped with various additional devices and have a large number of transition units. It is very important for a specialist to make sure that each node is reliably docked with the next and the previous one, so that it does not break, does not leak and will serve the allotted period reliably, without provoking accidents. In this case, it is important to choose the right fittings and pipes to which they will be attached.
In addition, each sprinklet socket malaysia must be prepared for installation in a certain way, since the cost of error can be high. So a unit hidden under the floor can leak, if the technical requirements are not observed, spoiling the coating material and forcing the coating to be completely renewed.
- It should be said that metal-plastic pipes, due to their flexibility, strength and lightness, are mounted quickly and easily, without the use of welding, without requiring additional tools and knowledge. In most cases, to work with them, there is no need to use special angle fittings, since metal-plastic pipes have increased flexibility.
- The metal-plastic pipe consists of three layers – it is an aluminum tube covered over the entire plane with a thick polyethylene layer, both inside and outside. The aluminum base provides a rigid frame, does not allow oxygen and ultraviolet light to pass through; and polyethylene protects the pipe from solid deposits and corrosion; the absence of toxicity makes the material safe for working with drinking water.
Note that aluminum is connected to polyethylene by welding and can be applied in two ways: butt and overlap. Butt welding makes the pipe more durable, while overlapping welding, in the places of welding, thinning of the pipe walls occurs, which leads to fragility. After welding, the layers remain tightly welded to each other, an indicator of the quality of the pipe is that it does not delaminate. Preparation for the installation of metal-plastic pipes is very simple and takes place in three stages: the pipe is cut to size, the ends of the cut are leveled with a sizer, irregularities and notches are cut off. After that, the pipes are equipped with fittings and assembled in accordance with the diagram.
Advantages and disadvantages of metal-plastic fittings
Reinforced-plastic piping systems have a number of undeniable advantages that make them popular. When using such fittings, no welding is required – this significantly saves money, eliminates the need for additional equipment and highly trained specialists. Fittings are easy to install and allow you to quickly assemble the entire system together. A minimum number of tools are required for installation.
The system, using metal-plastic adapters, can be connected to sewer pipes equipped with other types of pipes: steel, copper, plastic. For this purpose, specially created fitting configurations are used. Among the disadvantages of metal-plastic fittings, it can be noted that it is impossible to mount a monolithic system – and each node, fastened with an adapter, increases the risk of leakage. The reinforced-plastic pipeline cannot be monolithic.
The deforming properties of polyethylene is another weak point of metal-plastic fittings. The coefficient of thermal linear expansion – for polyethylene, aluminum and adhesive layers – is different. Under the influence of pressure, at the point of attachment of the fitting, deformation of the pipe layer occurs, and after 1 – 2 years a leak may open in such a unit. The gradual tightening of the nut only aggravates the situation, the more pliable layers are pushed to the aluminum, over time this leads to the breakage of the pipe section.
Pipes and fittings made of low-quality metal-plastic wear out much faster, some of them can also form through cracking of the material, leading to unforeseen accidents. So that the disadvantages do not appear, and the advantages of metal-plastic systems served faithfully, it is worth following simple principles when buying: give preference to more expensive products of well-known brands, use metal-plastic fittings of the most suitable configuration.