The act of flushing the heating system: acceptance and

Based on what is the act of washing the heating system? In general, how does the order of registration of the relevant works? How is their quality checked? Finally, how is the rinsing itself performed? Let's figure it out.

Procedure

So, given:

• House in need of flushing the heating system.
• A partnership of tenants ready to conclude a contract with a third-party contractor.
• An organization that is ready to take on the performance of relevant work.

What is the procedure for the parties in this very typical situation?

1. The heating system is inspected visually and passes pressure testing with a pressure 1.25 times higher than the worker, but not less than 2 kgf / cm2. All malfunctions identified during inspection and pressure testing of the heating system are eliminated before flushing.

What is the reason for this instruction? Yes, simply because there may be leaks in the washing process, and it is better that they do not become a reason for conflict between the parties to the contract.

1. A list of hidden works. Their list may include dismantling and installation of radiators, disconnecting flanges, generating electricity in the absence of power supply, etc.
2. The washing technology is selected..

It is useful: in the absolute majority of cases, the heating is washed with a hydropneumatic method - by feeding water-air slurry into the system. Chemical washing is used as an alternative to the complete replacement of heating pipes in cases where the deposits in them are exceptionally strong and are not removed by moderate mechanical effects.

1. The contractor draws up an estimate for flushing the heating system, taking into account the selected technology, hidden works, equipment depreciation, fuel costs, reagents and all other factors..
2. If the sum appearing in the estimate suits both parties, an agreement is drawn up for flushing the heating system.. There are a number of subtleties.
3. The contract stipulates not only the estimated cost, but also the procedure for its calculation.
4. In addition to the obligations of the parties regarding the timing of work and payment, it is desirable to specify the responsibility for failure to comply with the terms of the contract. Somehow, it turns out that the penalties provided for in writing make the relationship between the customer and the contractor much more seamless.
5. In addition, the procedure for amending or terminating the contract is specified. The reason is the same: there are less reasons for conflicts in the future.
6. The next stage - the actual work. After they are carried out, the heating system is filled and re-pressed.
7. The customer assesses the quality of flushing, accepts (or does not accept) the work and, depending on his decision, fills in the appropriate manner the form of the flushing act of the heating system. All disputes are resolved in court, on the basis of current Russian legislation.

Technology

We were going to touch upon not only the documentation, but also the washing technology. As already mentioned, there are two main ways to do this work.

Hydropneumatic technology

This is a typical flushing method in apartment buildings. If there is a compressor running near the open door to the basement, and a characteristic gurgling sound is heard in the batteries, your house is washed with a water-air slurry.

Cheapness and relative simplicity of the method brought him deserved popularity. Alas - pulp perfectly removes sludge, sand and dirt; but against rust and lime deposits it is powerless. In addition, hydropneumatic flushing is associated with the discharge into the sewer of a significant amount of coolant.

How to wash the heating of an apartment building with a compressor with your own hands?

1. One of the house (heating) valves in the elevator assembly - flow or return flow - is blocked.
2. Opened in front of her discharge into the sewer.
3. An air compressor is connected to the control valve near the open house valve. After it reaches the working pressure (not less than 6 kgf / cm2), the valve opens and air begins to flow into the heating circuit.
4. After the transparent water-air mixture passes into the discharge, the direction of flow of the coolant is reversed.
5. After shutting down the compressor, the water is discharged until air stops flowing through the discharge in the elevator assembly.

Nuance: flushing will be more effective if, in turn, to close most of the risers, so that the pulp goes through only one or two risers at a time. The price of the best quality of flushing is a high probability of the valves breaking off at old screw valves when the system is operating from the return pipeline: at the same time, water will move through the valve in an abnormal direction.

Chemical washing

The essence of the method is in continuous circulation through the circuit of an alkaline or acid solution with the addition of corrosion inhibitors. At the same time the rust and limy deposits completely is removed.

It is useful to know about several problems associated with this method.

Acceptance

In the first section of our material we touched upon the acceptance of washing in passing. Give her more serious attention.

Formally, the washing acceptance should be limited to measurements of the amount of suspended matter in samples taken in the elevator assembly and in several sections of the contour.

In practice, a simpler method is used:

• A few radiators unscrew the lower blind plugs.
• Representatives of the customer visually assess the contents of the end sections.

The results of the survey are activated. If desired, a sample of the act of flushing the heating system is easy to find on the sites of specialized organizations.

It is recommended to include the following items:

1. Washing technology.
2. When using the hydropneumatic method, it is worth mentioning whether the water used is cold or hot.
3. Water consumption and (in the case of hot) its temperature is also indicated.
4. Finally, an assessment of the quality of the washing (satisfactory or unsatisfactory) is entered into the act. In the second case, the procedure and deadlines for re-execution of work can be agreed.

Conclusion

We hope that our material has helped the reader to satisfy his curiosity in the field of documenting the flushing of heating systems. Attached video, as usual, will offer additional information. Successes!