Tag: <span>Трубы</span>

How to lay pipes ⠀
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It is better to bury a whole pipe into the ground without fitting connections. ⠀
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🗣 - Threaded fittings with collets are designed to be installed in a place accessible for visual inspection. ⠀
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Collet connections must be inspected periodically for leaks and tightened if necessary. ⠀
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⚠ Therefore, when burying fitting connections underground, the maintainability of the entire system drops sharply. ⠀
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If you still need to make the entire pipeline underground: ⠀
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🗣 - Use HDPE fittings for butt welding for “underground” connection. The process of joining HDPE is similar to soldering polypropylene pipes. It turns out a monolithic soldered connection without thread. ⠀
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Only pipes and fittings of the same type can be welded into one pipeline, for this a soldering iron for soldering PP-RC is used. ⠀
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⛓ The technology of such welding is as follows: ⠀
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1. The pipe is cut perpendicular to the longitudinal axis, all elements are degreased with isopropyl or isobutyl alcohol (used in non-freezing). ⠀
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2. The device is turned on, the temperature switch is set to a predetermined temperature of 200-260 ° C. The main thing is not to overheat the thin-walled pipe, because the melting point of HDPE is lower than that of PP. A twin nozzle is mounted on the welding mirror. ⠀
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3. At the same time, push the fitting onto the heated nozzle, and slide the pipe into the sleeve nozzle. ⠀
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4. At the end of heating, the parts are removed from the nozzles, connected and fixed. The pipe is fixed in the fitting for 10 to 50 seconds. This is necessary so that due to the increased pressure in the weld, due to thermal expansion, it is not pushed out of the fitting. During this operation, do not move the fitting and pipe mutually. ⠀
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5.⠀
Details cool. Only after complete cooling, the connection is mounted in place and a load is applied to it. ⠀
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🗣 - When connecting the three collet joints, I missed the rubber bands with silicone sealant and buried. It's been 10 years, nothing flows. ⠀
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⚠ Do not bury sewer and water pipes in one trench! Each pipeline needs an individual trench.

How to mount connections ⠀
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It’s not enough to choose a quality product, ⠀
it is necessary to lay the pipeline correctly and mount reliable connections. Most often, water PND connections ⠀
make on collet fittings. ⠀
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🔰 Since there are no metal parts in the flow part of compression fittings, this increases the corrosion resistance of the piping system made of this material. ⠀
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Mounting ⠀
On collet fittings, some key features must be considered. ⠀
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🗣 - Assembled the system. Despite the use of fum tape and a decent tightening, some HDPE fittings are leaking. ⠀
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When mounting a collet fitting, do not use flax, tow or fum tape “for extra reliability”. ⠀
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🗣 - Collet fittings are simply tightened by hand and that’s it. ⠀
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The longer the fitting, the more turns must be made to clamp it. Pipes for water supply are inserted into the fitting until they stop, and not until the rubber band. ⠀
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Sometimes you can hear the opinion that if you lay the PND pipeline on the ground, then nothing will happen to it, but this is not so. ⠀
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🗣 - PND products are unstable to sunlight. According to GOST, they are allowed to be stored under the sun for a maximum of two months. And this is in ideal conditions when the manufacturer fully complies with the technology and uses pipe polyethylene. ⠀
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Therefore, the pipeline from HDPE is best buried in the ground. And to do it better to a depth below freezing, this will allow the fittings not to freeze. ⠀
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A high-quality modern HDPE pipe withstands a large number of freezing and thawing cycles without destruction, but for fittings, even the most expensive, any freezing is fatal. ⠀
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⚙ The installation process itself is as follows: ⠀
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1. Dig a narrow trench 2 meters deep ⠀
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2. Stones are removed from the trench, otherwise they can push through the walls of the product ⠀
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3. Lay the pipe (not tight, this is a general rule!) And sprinkle it with sand ⠀
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4. If necessary, the water supply is additionally insulated ⠀
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5.⠀
The trench is completely buried ⠀
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In continuation of the previous post about HDPE pipes. ⠀
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On the HDPE pipe should also be indicated: ⠀
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- Diameter ⠀
- wall thickness ⠀
- Manufacturer ⠀
- Strength indicator of material - is marked as follows: PE100 or PE80. ⠀
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Polyethylene PE100 has a higher density, which means strength (can withstand higher pressure) than polyethylene PE80. ⠀
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🗣 - We advise you to choose products on which GOST is applied, there is a manufacturer’s marking and a footage is indicated. They are suitable for running water. ⠀
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🗣 - In accordance with GOST 18599-2001, according to which pipes for water supply are made, the presence or absence of blue stripes on the HDPE pipe does not yet indicate whether it is intended for drinking water or not. ⠀
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Some unscrupulous manufacturers may apply blue stripes to low-quality or HDPE pipes. Therefore, first of all, you need to look at what is written on the product itself! ⠀
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⚠ The water pipe in accordance with GOST 18599-2001 is made only of low-pressure polyethylene without adding secondary raw materials. ⠀
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You also need to pay attention to the price - compare the price tag of several manufacturers. Prices are much lower than the maximum and even average market prices enough to alert, because the manufacturer will not sell at a loss. The price of a quality product should be decent. ⠀

For the autonomous water supply system in the house to work “for five,” it needs high-quality components, including a pipe for the water supply. ⠀
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HDPE - the most popular material for entering cold water into the house (from a well, etc.) ⠀
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🗣– Correctly say ⠀
PE (polyethylene), not ⠀
HDPE, of course, provided that the pipes are made in accordance with GOST 18599-2001 "Pressure pipes made of polyethylene." ⠀
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HDPE is the raw material (low pressure polyethylene) from which PE products are made. ⠀
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However, we will adhere to the "popular" name. ⠀
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💦 It is the quality of the feedstock that largely determines the life of the pipeline. And if in some cases the light water main from HDPE has been used for decades, then in other cases even a correctly installed system starts to flow in 1-1.5 years. ⠀
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❗ The fact is that many companies use plastic waste in the production of HDPE products - the so-called “secondary”. Moreover, everything is used, even used disposable syringes. The strength and reliability of such products does not stand up to criticism. And cold water from them has a sharp unpleasant chemical smell, which does not disappear even with time. ⠀
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🗣– The easiest way to choose a high-quality HDPE pipe designed to supply drinking water in order to lay a water pipe is to pay attention to its appearance. ⠀
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⚠ The defective product is black or dark gray. There is no alphanumeric marking on it. Alien inclusions or stripes are noticeable in the material. If you smell the product, you can feel an unpleasant chemical smell. Its walls are of different thicknesses (it can be seen when viewed from the end). ⠀
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This design can only be used to supply process water. ⠀
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✅ HDPE design designed for drinking water - black with blue stripes or completely blue. It is made in a uniform color, the material itself is smooth, without splashes and stripes. The wall thickness corresponds to GOST. A small marking is required (stamped or with a printer for marking) - “Drinking pipe GOST 18599-2001”. ⠀
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⏯ To be continued. ⠀