Gas equipment in the house, which includes stoves and gas heating boilers, are equipped with hoses for fuel supply. Most often they are painted in a bright yellow color. It is forbidden to work with them independently, such events are carried out by special services. But the choice and purchase of this element often lies on the shoulders of the end user, so it is important to consider what flexible eyeliner is.
Varieties of gas hoses
If we consider gas hoses, then we should divide them into three varieties, which differ from each other in the material of manufacture. Thus, bellows eyeliners can be found on sale; rubber sleeves, which are supplied with a metal braid; as well as rubber-fabric elements. Flexible eyeliner based on rubber-fabric sleeves is the softest, this quality can be called negative, since the mechanical rigidity is at a minimum level. The advantage is that rubber products are not able to conduct electricity. More common today amongconsumer hoses with a metal braid. The reason for this popularity is expressed in low cost. Such a gas sleeve differs from water connections in that a yellow stripe can be found on its surface. The bellows-type flexible hose is characterized by maximum rigidity and reliability among other types of hoses. For such a product, you will have to pay the highest cost, the regulatory documentation recommends the installation of products of this type. This is due to the fact that such a material perfectly copes with the effects of high pressure, which is created by the gas stream.
What you need to know before installation
You can choose a flexible eyeliner with certain characteristics, but in any case, the diameter should be more than 10 millimeters. This is due to the fact that modern gas equipment has a high capacity, therefore, it requires high fuel consumption for efficient operation.
Installation rules
Before proceeding with the installation of a flexible gas supply, it is necessary to shut off the gas pipeline. If we are talking about installing new gas equipment, then you must first dismantle the old device, if necessary. At the next stage, a gas hose is installed, the master must check the tightness of the existing connections, which will help eliminate the possibility of gas leakage. The new device is installed on the surface according to the level, and afterhe alth check in progress.
Recommendations for installation work
When installing a flexible gas pipe, it is important to follow some rules, one of them is to install the equipment at a distance of 4 meters or less from a rigid gas pipeline. There must be a dielectric insert between the flexible hose and the gas cock. For flexible supply of household gas equipment, all three types of hoses, which are also called sleeves, can be used. Rubber-fabric provide the highest degree of safety of gas equipment. A positive electrical potential is applied to the pipe through which the gas will flow to the residential building. This is necessary so that the pipe, which is in the soil, does not corrode. At the entrance to the living space, the pipe has a dielectric insert, and the risers are not under potential.
Recommendations from experts
When a flexible gas piping is installed, one cannot ignore the possibility that current will flow through the bellows or metal braid that is at the base of the rubber hose. This can be dangerous for a sleeve that is equipped with a braid. The cross section of the wire is very small, indicating that the current density will be high. In this case, you need to be afraid that the hose braid will heat up like a spiral of an electric stove. When a flexible faucet hose is installed, it is recommended to use a real dielectric insert. Most oftenit is made of plastic or has a metal thread at both ends. Experts advise to purchase a bellows metal hose with yellow dielectric insulation, which is applied over the metal. It is best for the consumer to forego the bare sleeve. Manufacturers apply the coating for aesthetic reasons to make the surface of the hose easier to clean. However, due to the electrical characteristics of this coating, it prevents current flow in the sleeve if it touches the riser.
Nuances of installation work
It is worth remembering that a flexible gas supply must be installed only by specialists. The bending of the hose should be excluded, but if such a need arises, then it is necessary to ensure that the radius does not reach the minimum level established by the documentation. Before the nuts are connected to the consumer, the wiring must be configured to the required configuration. The wiring should not be bent in a section that is closer than 7 centimeters from the union nut. This is true if it is connected to a gas appliance. In no case should the flexible reinforced hose be stretched; twisting of the hose should be avoided. If there is a need to use union nuts, then they should be operated exclusively with flat gaskets. In order to exclude the possibility of a breakthrough of the gaskets, do not overtighten the nuts. If damage was noticed, then a complete replacement should be carried out.
What elseneed to know about bellows piping
Flexible faucet piping today you can buy in the relevant goods store, this also applies to bellows piping, which, although expensive, has found its distribution among consumers. This product is a corrugated hose made of stainless steel. At the ends are fittings made of stainless steel. Such a connection must be fixed to the gas inlet pipe or equipment with union nuts. Be sure to use metal gaskets, which should be soft, this should include aluminum or copper. Special plastic can also be used as a gasket material.
Such a flexible stainless steel hose can have corrugations and fittings made of different materials. However, experts recommend purchasing products that are completely made from the same base. This requirement is due to the fact that welding of different metals can cause an electrochemical reaction, which contributes to the destruction of the weld. Such a connection cannot be called strong.
Conclusion
Experts recommend paying special attention to those pipes in which fittings are soldered with silver or tin. They will not be as durable as those in which the fittings are glued. The bellows eyeliner is capable of withstanding pressure up to 6 atmospheres, and the elongation of the product can be 100%, which indicates that the bellows can be safely stretched during installation work up todoubled.
