Chemical flushing of water supply systems is the key to high-quality water. Repair and maintenance of engineering systems, etc., central heating

The administration of the Arsenievsky city district informs that due to the increase in the number of consumer complaints about the unsatisfactory quality hot water the question arose of carrying out large-scale work to improve the quality of hot water supply.

Specialists of the scientific and technical center of the Far Eastern State Technical University analyzed the quality of hot water and established the reasons for the non-compliance of water quality with the requirements of sanitary norms and rules.

Based on the results of the work carried out, recommendations and proposals for improving water quality were developed. One of the most important measures in this direction is the flushing and mandatory disinfection of the heating system, hot water supply, and heating networks. This work requires a fairly long time and should be carried out during the non-heating season. We remind you that flushing of systems should be carried out annually after the end of the heating season, while complete clarification of the water should be achieved. Disinfection of heat consumption systems is carried out in accordance with the requirements established sanitary standards and rules. After disinfection, a final flushing of all systems will be carried out simultaneously.

According to experts, only a large-scale flushing of the systems of all city facilities - apartment buildings, buildings and structures of all forms of ownership will give a tangible result and significantly improve the quality of hot water.

The city administration and Primteploenergo have jointly developed a schedule for flushing these systems. These works will be carried out during June-July. It will take about two months to carry out the planned set of measures, with the active participation of all owners of buildings and structures, management companies, homeowners associations.

Residents of the city need to follow the announcements on houses and entrances indicating the timing of work in this house. During work, it is necessary to keep the hot water tap closed or even turn off the hot water tap at the entrance to the apartment in order to avoid accidents during disinfection with high content chlorine. Warn children not to open hot water taps during this period, especially in those houses where hot water is supplied from the heating system.

Works in the houses on flushing the system will be carried out by management companies, homeowners associations together with Primteploenergo KSUE. During the work, additional costs are possible on the part of residents of apartment buildings - in the event that the contract for the management, maintenance and repair of the house does not provide for payment for flushing and disinfection of the hot water supply system. In this case, the payment for these works (the cost of water for washing and chlorination) can be included additionally in the "Maintenance and Repair" receipt. In any case, this amount will be insignificant.

We remind you once again that flushing the hot water supply system is an obligatory component of preparation for heating season according to the rules technical operation thermal power plants, established by the Ministry of Energy of the Russian Federation. In Order No. 92 dated April 21, 2000. State Committee Russian Federation for Construction and Housing and Communal Complex "On approval of organizational and methodological recommendations for the use of heat supply systems in cities and towns Russian Federation"It is said that" the duration of hot water supply corresponds to the duration of the year with a decrease by the summer (repair) period, the number of days of which is established by the local government.

Water supply is a system for the continuous supply of water to consumers, which is necessary for domestic, technical and economic purposes. These are mainly underground pipes or channels. The water purified from mechanical impurities in the filter system is collected in water-lifting towers, and then distributed through city pipes for water supply.

To avoid the formation of deposits of various salts, chemical flushing of water supply systems is used. The article will show you how to do it.

Causes of clogged pipes

Water transported through pipes, due to chemical and biological processes occurring on the walls of pipelines, often forms deposits of iron, calcium, magnesium salts, silt and biological formations, leading to fouling of pipe walls and a change in the organoleptic characteristics of water.

The internal rough surface gradually retains particles of sand, dirt, silt. This promotes the formation of an environment for the development of bacteria.

The use of all kinds of filtration systems often cannot completely retain colloidal substances, the water becomes cloudy and changes color. Many suburban settlements have spare and regulating containers with drinking water. These are underground reservoirs and water towers.

Tip: To verify the presence or absence of dirt and carbonate deposits in technological tanks for storing and distributing water, it is necessary to drain the liquid and visually examine the internal surfaces of the walls, bottom and all structural elements.

Due to the sharp pressure drop in the pipelines, which is especially noticeable when the water is turned off and then turned on, an unpleasant aftertaste of rust appears. During the cavitation process, clots of dirt with drinking water fall into, and then into human food, which can cause various diseases and poisoning of the body.

True signs of clogging of the water supply and sewerage of a private house are:

• Bad smell.
• The appearance of rust flakes.
• The taste of metal.
• Changing the color of the water.

In case of untimely flushing of the hot water supply system, which uses metal pipes, their throughput may decrease, the circulation of the resource will deteriorate. This will lead to increased consumption energy to provide optimal temperature water to increased consumption.

Types of water pipes

Before proceeding with chemical washing water pipes, you need to get acquainted with their types.

The materials of products and their features are presented in the table:

Ways to flush the water supply

After getting acquainted with the materials for the manufacture of water pipes, it becomes clear that metal pipes most often need to be cleaned of metal elements and contaminants caused by unfiltered water.

Flushing of water supply systems can be done in the following ways:

• Hydrodynamic.

In this case, scale and blockages are removed from the pipes with a thin jet of water supplied through special nozzles under high pressure. This method of cleaning can achieve great results at not too high costs.

This is two times cheaper than replacing water pipes. When using hydrodynamic cleaning devices, pipes can be completely cleaned of magnesium, calcium, sodium salts, grease, rust, scale.

• Hydrochemical.

With this method of non-separable flushing of water supply systems, deposits and scale can be transferred to a dissolved state, and then simply washed out of the pipes. During chemical flushing of the water supply system, the means approved for use by the sanitary and epidemiological supervision are used.

In this case, the complete safety of the compositions for pipelines and water heating equipment is guaranteed. Reagents affect only rust and scale. Flushing of the heating system is carried out with alkaline and acidic solutions of reagents.

• Pneumohydropulse. This cleaning method flushes the system with multiple pulses transmitted by a special apparatus. Under the influence of a kinetic impulse wave in the liquid, which fills the pipes, cavitation bubbles appear, which have a high intensity in the rarefaction period. Such bubbles, moving with the flow of water into the area of ​​high pressure, in the period of compression, begin to burst, creating a shock wave. After that, deposits begin to come off the walls of the pipes, and then the next wave carries them away.

Chemical flushing of water pipes

Chemical flush do-it-yourself water supply systems is a reliable and economical method that allows you to clean any system of dirt and scale. In one cycle, the hot water supply system (DHW), cold water supply, sewerage, heating system is flushed, hot water boilers and boilers can be cleaned (see).

Flushing the water supply can be done with solutions such as oxalic acid or imported Cillit.

When performing the flushing process, it is enough to plug the pipe near the valve and fill it with a reagent for two hours. After cleaning the pipe, and periodically during its operation, it is necessary to disinfect the water supply.

In this case, you can apply:

• Chlorine lime. This is the most popular disinfectant.

• Sodium hypochlorite.
• Chlorine liquid.

You can flush the pipeline:

• Elastic piston. Usually this is a foam rubber cylinder with a diameter greater than the inner diameter of the water pipe by 1.3 times, about 2 diameters long, as in the photo.

• Water that is distilled for discharge through a section of the water supply.
• Pulp or water-air mixture. This is a hydropneumatic flush, which is performed by the air compressor. The ratio of air and water in the pulp is selected 1:1.

SNiP 3.05.04-85 contains additional recommendations that must be followed when flushing and disinfecting the water supply:

• The foam piston is used in areas where there are smooth turns at an angle of up to 15 °. In this case, it is necessary to fully open the valves, remove the parts protruding inward.
• The speed of movement of the piston should be in the range from 0.3 to 1 m / s, with a pressure in the water supply of 1 kgf / cm².
• The discharge diameter for the runoff of contaminants leaving the water supply can only be one step smaller than the diameter of the pipe being flushed.

Tip: When flushing hydropneumatically, air must be supplied to the pipeline at a pressure approximately 1 atmosphere higher than the water pressure. The pulp must move at a speed of up to 3 m/s.

• Disinfection of pipelines should be carried out in sections up to 2 km long at a time.
• After 500 meters, temporary valves are installed each time, through which samples are taken to determine the concentration of chlorine.

To better imagine the whole process of cleaning and disinfecting water pipes, you should watch the video in this article.

Drawing up an act of flushing the water supply system

After completion of work, it is necessary to draw up an act of flushing the water supply system - a sample of it is presented below.

The document states:

• The composition of the commission, which includes:

1. SES (sanitary epidemiological service).
2. Representatives of the construction and installation organization.
3. Exploiters.

• Object characteristics:

1. His type.
2. Length.
3. Pipe diameter.
4. Its volume.

• The type of reagent used and the concentration of active chlorine in it.
• Time of processing.
• The results of physicochemical and biological analyzes of the liquid after treatment.

Chemical flushing of the water supply system and its timely disinfection, allows you to keep pipelines in normal condition, without the risk of getting poisoned or other troubles for your body.

Flushing ( cleaning) water supply heating systems - why is it necessary. All pipeline systems will sooner or later become clogged. various types deposits. In many cases, when operating a pipeline system, cleaning ( flushing) and disinfection of heating and water supply networks is carried out only in connection with problems encountered during operation. This approach usually leads to unsolvable problems. simple methods. Arise severe blockages, traffic jams are formed in the system and, worst of all, expensive equipment fails. As a result, drastic measures have to be taken. Repair, replacement of sections of the pipeline, replacement of equipment - all this is laborious and very costly. It is much more correct and profitable to build an operation system in such a way that the deadlines for routine and preventive maintenance are fully observed. This will avoid unplanned situations and, most importantly, breakdowns of your network. An integral part of routine maintenance for heat supply networks (water supply) is the flushing of supply systems. Timely flushing of supply systems will allow you to:

• Improve system performance;
• Reduce energy costs;
• Eliminate emergency situations during operation;
• Extend system life.

Employees of the GLOBAL-ENGINEERING company are ready to flush, descale and remove deposits from any pipeline system (heating, cooling, cold water and hot water).

In the list of services we provide :

Flushing ( cleaning) heating systems

Flushing ( cleaning) water supply systems

Flushing ( cleaning) air conditioning systems

Flushing ( cleaning) pipeline pipes

Flushing ( cleaning) radiators, batteries

Flushing ( cleaning) heat exchange equipment

Pressure testing of heating and water supply systems

There are 2 types of flushing of supply systems:

Chemical flush ( cleaning

The system is filled with a reagent (special cleaning fluid). Via special equipment the reagent is circulated through the system. During circulation, the reagent allows you to remove scale and deposits formed in the system. The selection of the reagent should be carried out by specialists guided by the results of the analyzes performed. After flushing, the reagent is removed from the system and the system is further flushed. After flushing, the system is filled with coolant and pressurized.

Hydropneumatic ( hydrodynamic) flushing ( cleaning) heating systems, water supply

Flushing ( cleaning) heating, water supply systems are made using a special compressor unit. In this flushing method, deposits are exposed to high pressure water. Compressor high pressure creates impulses that act on scale and deposits. Using this method, it is possible to flush the system without using chemicals. When using professional flushing equipment and strictly following the technology, the possibility of damage to the system components is completely excluded. Before washing by this method, all calculations must be carried out experienced professionals. Other mechanical methods may result in damage or failure of the system. In the arsenal of our company there is an extensive list of special equipment for flushing systems. OOO GLOBAL-ENGINEERING is ready to provide services for high-quality flushing of heating systems, water supply by the hydrodynamic method. Hydrodynamic flushing is one of the highly effective ways cleaning engineering systems.

It is also possible to apply combined method flushing of the system, when during hydropneumatic flushing, as working fluid chemical solution is used.

We offer a comprehensive service for the heating system, water supply of your home or business. The list of work performed includes:

Chemical flush ( cleaning

Hydropneumatic flushing ( cleaning) heating systems, water supply at home

Flushing and pressure testing of the heating system, water supply at home

Flushing ( cleaning) pipelines (external, internal) of the heating system, water supply at home

Repair of the heating system, water supply at home

Repair of pipelines (external, internal) of the heating system, water supply at home

Flushing and pressure testing of the heating system cost (price)

The price of flushing (cleaning) the heating system, water supply at home plays an important role. Our experts are ready to advise you and offer best option work that will allow minimal cost achieve the best result.

Flushing the pipeline system: who to trust ?

You can try to fix the system yourself, but the consequences can be dire. At wrong choice composition for flushing (reagent), it will destroy the solder joints, spoil the seals. Hydropneumatic ( hydrodynamic) cleaning the system without special equipment and skills can damage the equipment and components. This will lead to the need to replace expensive components or parts of the system.

Our company has years of experience in the provision of various services such as flushing heating and flushing water supply. All work is carried out in compliance with all the rules and recommendations of regulatory and technical documentation in this industry. If you need to flush the refrigeration supply or flush the system for any other purpose, before putting it into operation or after emergency, contact our employees for help, and they will do everything that is necessary as quickly and professionally as possible.

Contact LLC. GLOBAL ENGINEERING . The result of our work is always the same - high efficiency and trouble-free operation of the equipment.

For service request

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Rusty dirty pipes can not only cause a violation of thermal and hydraulic modes but also a source of pollution drinking water. Internal fouling of pipes helps to reduce the "live" (flow) section and can lead to complete blockage and stop the flow of water to the points of water intake. Flushing the water supply system is an event that will prevent these problems and significantly increase the life of the entire system. If preventive work is ignored, in the end this will lead to the need to replace pipes, which in some cases is accompanied by the dismantling of the structure and its subsequent restoration.

The sure signs that the water supply and sewerage of a private house are clogged are the appearance bad smell. Clogged water pipes are indicated by the appearance of rust flakes, a metallic taste, and a change in the color of the water. If the flushing of the hot water supply system using metal pipes was not carried out in a timely manner, this will lead not only to a decrease in their bandwidth, but will also negatively affect the circulation of the resource. The result will be an increase in energy consumption to ensure the optimum temperature, as well as an increased consumption rate.

Flushing water pipes - main types

The most common cause of fouling inner surface pipes are corrosive processes, as well as pollution caused by unfiltered water. Flushing the water supply system can be of the following types:

• hydrodynamic. It consists in removing scale and blockages from pipes by cleaning the system with thin jets of water, which are supplied under high pressure through special nozzles. This type cleaning allows you to achieve high results at a relatively low cost. Hydrodynamic flushing of the system will cost half as much as replacing water supply pipes. Thanks to the operation of hydrodynamic cleaning devices, magnesium, sodium, calcium salts, fats, rust, scale are completely removed from the pipes.

Video instruction - Hydrodynamic flushing of pipes

• hydrochemical flushing is one of the most common non-separable flushing methods water supply and heating systems, which allows you to transfer deposits and scale into a dissolved state and wash them out of the system. Chemical flushing of the water supply system uses products that are approved for use by sanitary and epidemiological supervision. This guarantees their complete safety in relation to pipelines and water heating equipment. Such reagents act only on scale and rust. For flushing the heating system, alkaline and acidic solutions of reagents are used. For example, composite inorganic and organic acids (compositions based on caustic soda, phosphoric acid, solutions with various additives, etc.). The exact composition of a particular flushing agent is kept secret by manufacturers.

Chemical flushing of the water supply system is a reliable and economical method that allows you to clean the system of dirt and scale. With its help, a positive result is quickly achieved. In one cycle, you can wash not only DHW system(hot water supply), but cold water supply, sewerage, heating system, clean heating equipment (DHW boilers and boilers).

• Pneumohydropulse flushing water pipes. This method cleaning allows you to flush the system by multiple pulses that are transmitted using a special apparatus. Under the action of a kinetic impulse wave, cavitation bubbles are created in the liquid filling the pipes, which have a high intensity during the discharge period. Receipt bubbles, moving with the flow of water towards the area of ​​high pressure, as well as in the period of compression, burst, creating a shock wave. Under its action, deposits come off the walls of the pipes and the subsequent wave carries them away.

The hot water and heating system is much easier to flush than the rest. This is due to the design of the circuit, which is closed or closed. Therefore, all types of washing pass here easily and painlessly. It is better to flush the sewer system by chemical means, since it is considered non-pressure, and, therefore, the presence of high pressure can damage pipelines and their connections. The cold water supply system can be flushed with any of the options listed. But at the same time, it is necessary to completely cut off the network from external influence (source, equipment or central backbone). It is also recommended to leave one of the water points open so that all plaque and rust can freely exit the pipelines.

Disinfection of water supply pipelines is required when commissioning areas after installation, or after repair and restoration work. The data of laboratory analysis of water samples taken from the system can also serve as a prerequisite for disinfection. Water quality must comply with the requirements of sanitary and hygienic norms and current standards.

Before carrying out disinfection measures, water supply pipelines should be flushed from corrosion products and deposits formed during operation or as a result of construction and installation works. For flushing hot and cold water supply systems, the Engineering Service Group of Companies uses specially designed installations. The technology, as well as the equipment used, are protected by the RF Patent. The products used for flushing water mains are environmentally friendly. This fact is confirmed by the certificate of the Ministry of Health of the Russian Federation and the sanitary and epidemiological conclusion. After cleaning and flushing, water supply pipelines are checked for leaks by carrying out hydraulic tests. If violations are found, the malfunctions must be eliminated.

Procedure for disinfection.

Depending on the features inherent in a particular object, it is individually selected:

• disinfectant;
• optimal concentration of the agent;
• the required amount of disinfectant is determined depending on the total volume of the system (pipeline);
• duration of disinfection;
• solution temperature;
• place of connection to the system;

Initially, the site where the work is being carried out is disconnected from common system. An installation for supplying a solution is connected to the object through a hydrant, branch pipe, or a pre-prepared tie-in. In the installation tank is prepared disinfectant solution with the calculated concentration, after which, it is served in portions pumping equipment installation until it is completely filled into the system. available on site stop valves close-open to carry out its disinfection. Due to the pressure created in the system by pumping equipment, full contact with the surface is ensured, the solution enters the pores, fills the roughness of pipelines and fittings. Modern disinfectants used by our organization in the course of work are environmentally friendly and biodegradable, waste solutions can be drained into sewer networks. After removing the spent solution, the system is thoroughly washed with clean drinking water.

Our company performs disinfection of cold drinking and hot water supply systems, as well as drinking water tanks, using modern equipment and highly effective products.