crimping heating Act

No one will argue with the fact that the heating system for the residents of the countries with cold climate is the most urgent need in the winter.The most common are the heating system with a closed loop, which circulates the heat transfer fluid.For any such system does not create problems after its initial launch, as well as during the entire operation, it is necessary to periodically measuring control and preventive measures, which allow to maintain the internal cleanliness and efficiency.crimping heating system certificate is made only after the hydraulic tests, which are designed to confirm its suitability for use.

What is crimping and when it is required to carry out

Crimping is a specific set of measures to check the tightness of the heating system.It should be done in the following situations:

• After the system was installed and its need to commission.
• Every year before the start of the heating season on older systems.
• If on the heating system repairs were carried out in violation of its tightness.
• In carrying out repairs of individual components of the system and to identify weak areas of the pipeline before it.

Crimping is performed with air or water, are injected under pressure into the system.For this purpose, pneumatic or hydraulic pumps.In areas having defects, there is seepage of water or outside air.Crimping allows to simulate real emergency situations, such as water hammer, which permit this breakthrough system.

During this procedure, quality parts withstand the load and defective, will be felt and will be found to replace it.In multi-storey buildings molding is carried out with compressed air, which prevents water seepage on the lower floors.

In what sequence should carry out work

Before starting to carry out a pressure test, you need to take into account the following features of your heating system:

• View layout of pipes in the system.
• All the characteristics of pipes, including the age, material and wall thickness.
• floors of the building.
• Specifications valves.

Taking into account this, you can start immediately to carry out the very molding that consistently includes the following activities:

• preparation and adjustment of the equipment.
• Draining, which must be replaced.
• user verification system fluid under pressure or compressor discharge air.
• final rinse system and filling her constant coolant.
• Drawing documentation of the work performed.

In identifying the shortcomings in the testing, pressure testing is suspended, and problem areas or parts are replaced with new ones.Thereafter, molding is carried out again.This continues until no complete sealing is achieved.

What is the pre-flushing pipes

system before starting production for flushing and pressure testing of the system, it must be removed from the old coolant.After that produce flushing pipes.During operation thick rust layer formed on their inner surface, and scale salt deposits.They narrowed the lumen conduit, and reduce the heat, which adversely affects the efficiency of the entire system.Deposition thickness of 1 - 1.5 mm, it can decrease by 15%.Constricted passageways retard movement of coolant in the system, increasing the load on the boiler and pump, which increases energy consumption.Scale is formed as a heating radiator, is the cause of uneven warming.

It is worth noting the fact that the corrosion and salt deposits over time may completely destroy the metal pipe, especially when high pressure occurs.This scaling may contain substances such as oxides of magnesium, sulfur, calcium, zinc and copper.To conduct molding without removing them useless thing, because damage may be masked by these oxides.

rinse and clean system electric compressor or hand about once every 5 or 6 years.Both devices are effective and do an excellent job with this task.

What are the different ways to wash the heating system

There are various tools and techniques for washing heating system:

• pnevmoudara Creation, that is, short-term sharp increase pressure several times.This allows the plaque layer peeled, and subsequently be washed from the system by flushing.
• Flushing with chemical solvents, which are able to decompose the salt deposits and oxides into soluble substances.However, the chemicals do not affect the silt, which need to be removed by other means.
• bubbling or Pneumohydraulic method.This complex variant descaling, wherein the system is injected water and compressed air simultaneously under high pressure.The system must be running.As a result of using this method gives a very efficient purification from virtually all types of deposits in the pipes.

If heavily soiled or when a small diameter pipe is best used in combination all of these methods, which is the most effective solution.

How are gidropnevmoispytaniya

In service organizations all testing processes and washing is carried out after the end of the heating season, to have enough time before the next winter for repairs.It is recommended to follow the same principle, and private owners.In autumn, after filling the water system, it is necessary once again to check that there were no surprises in the cold season.The process of testing is carried out in the following order:

• As soon as the heating season, you need to check the status of valves, heat and elevator assemblies, pipeline risers in multi-storey buildings.
• After that washed risers for the prevention of seasonal contaminants.
• Then monitor all other components and assemblies of the heating system for leaks.Identified deficiencies remove, and replace damaged parts with new ones.
• control piping insulation is made in the basement.
• test events then made, and the system is filled with coolant, if everything is normal.The liquid may be safely within the system waiting for the next season, since the pressure therein is much lower than in the tests.

Test procedure is as follows: the system is filled with coolant, and then connect it to the compressor and pumped it up to the level of pressure screening, which is registered in the SNIP.

heating Special pumps for discharge pressure can be manual or electric.It has measuring instruments that measure pressure.The pressure gauge has parameters and a scale that meets the necessary requirements.

For example, pressure gauge with accuracy class 1.5 is used to control the pressure.The diameter of its body should be not less than 160 mm, the division value not greater than 0.1 kgf / cm2, which is 0.1 atmospheres or 0.01 MPa.Maximum measured value must not be less than 4/3 of the pressure, which is used in the tests.It should be noted that a pressure gauge, as well as any other measuring device should be checked and sealed by the state metrological service.

test pressure values, in accordance with the rules and regulations must be 16 kgf / cm2 (1.6 MPa) in the main pipe.This pressure is maintained for 5 minutes, then reduced to working and inspect all system components, paying special attention to the condition of valves.A successful test is if it was not detected no leaks, breaks, fogging oil seals and flanges.

-house wiring at the initial start-up test at a pressure of half - two times higher than the working, and the old system pressure was raised to 25 - 50%.Pressure values ​​in the test still dependent on those devices that are installed in the system.Indicators can be presented in tabular form:

When testing the coolant temperature should be 40 - 45 degrees.The room temperature should not be negative.Before starting work, air plugs and air are removed from the system completely.

Indicators system, under which the test is considered successful

test pressure test confirms the suitability of the system for use with the following parameters:

• If the system is water or steam, the pressure drop in a 5 minute periodnot more than 0.2 kgf / cm2 (0.02 mPa).When using
• panel heat exchangers for 15 minutes, the pressure should not fall by more than 0.1 kgf / cm2 (0.01 MPa).
• When pressure testing the hot water system, this figure should be at least 0.5 kgf / cm 2 (0.05 MPa) for 10 minutes.
• Any leakage, fogging, wetting should be completely excluded.

Reduction of the above indicators of a malfunction, which should be identified and eliminated.To identify the need to check it absolutely all devices and system components.Especially it is necessary to look inside the ceilings, walls and other difficult areas.

After identifying and troubleshooting crimping carried out in full again.Only by achieving positive results in the system to create a working pressure and begin to be an act of molding the heating system.

What is included in the act of crimping heating

All control measures produce the authorized organizations in the sphere of housing and utilities, is the audited entity on whose site.Multi-storey buildings are served by the organization to which the relevant contract was signed by the management company.The owners of private homes for molding must deal with the application in the regional organizations or private companies.The main thing is that specialists have been certified to carry out such work and had all the necessary equipment.

If you decide to spend your own molding, the final the results should be recorded in the act of the inspector, who was present at the same time.Form of the act necessarily has had.

In the act of molding shall bear the following important information:

• detailed description of the system or a portion thereof, which were carried out monitoring activities, as well as their length.
• type and range of tools by which these tests are carried out.
• pressure settings and load duration.
• Readings at all stages of work.
• Signatures customer and the contractor, as well as a working number of the certificate, which carried out molding directly.

for his work in apartment buildings responsibility of public service in a private home - the owner himself.crimping Act is a legal document, so must be completed correctly, without errors and corrections, the information in the rows must correspond to the essence of these lines.He can become a supporting document, in an emergency incident and can confirm the guilt of testing organization as needed.

In the course of verification activities inspector should check the water hardness.The sample is taken directly from the tap of the heating system and is sent to the laboratory.Testing is carried out for the content of magnesium and calcium salts.These indicators should not exceed 75 - 96 units.If there is excess, even when fully serviceable system, it is considered not authenticated, to address this deficiency.

Thus, the act of drawing up the heating system pressure test is a very important control measures, to be ignored that even the owners of private houses.