Today, let's talk about some knowledge about PPR tubes. Do you know all these?

water pipe laying

When decorating and laying water pipes, try to prevent them from laying on the ground, because the water pipes are installed on the ground and have to bear the pressure of tiles and people on them, and there is a danger of stepping on the water pipes. It is best to route the wire from the top, the amount of pipe material may increase slightly, but it is beneficial to future pipe repairs. If there is a water leakage problem during check-in and use, it can be found in time, and it will not affect the downstairs residents (the compensation will be more than the extra water pipe cost), and basically only part of the ceiling will be removed for maintenance, and there will be no knocking on the floor tiles but not finding them. source problem.

Hot and cold water pipes

The wall thickness of the hot and cold water pipes is different. The cold water pipes cannot be used as hot water pipes, and the distance between the cold and hot water pipes should not be less than 15cm, otherwise they will affect each other. Professional water pipe construction will also do insulation treatment. Insulation is not only about making hot water pipes, but also cold water pipes. Because problems such as light and humidity will also affect cold water pipes, Lao Wu uses colored rubber and plastic insulation. . At the same time, the piping also pays attention to the heat on the left and the cold on the right, which is the same as the international standard.

water pipe welding problem

When decorating and purchasing pipes, it is necessary to pay attention to whether the inner diameter of the pipe is symmetrical. The uneven thickness of the pipe diameter will affect the connection of the two interfaces. Secondly, the welding between the pipe fittings also affects the service life of the water pipe in the later period, so it is a great test of the plumber's skills. Water pipes are generally made of hot-melt welding technology, and professional equipment is used to heat the pipes to about 260°C, while the water pipes used by Lao Wu need 270°C-280°C because of their denser materials, and there are also hot-melt water pipes. Welded "double eyelid" process.

water pipe pressure

The "Quality Standard for Home Decoration and Decoration Engineering" of the Decoration Industry Association has such rules on the time and pressure of the pressure test: the newly installed water supply pipeline must be subjected to a pressure test according to the relevant rules. The test pressure of metal and composite pipes is 0.6 MPa, and the pressure is stabilized for 10 minutes, and the pressure drop in the pipe should not exceed 0.02 MPa, and there is no leakage; the experimental pressure of plastic pipes is 0.8 MPa, and the pressure is stabilized for 20 minutes. leakage.

GA-4804-1 Cross