When laying the pipeline construction is necessary to protect them against external influences that can disrupt the pipes. For protective functions used insulation ppm. In recent years, as popular lines, using this technology. In total, the insulating protection of metal there are three types of layers and APM treats them.
What is the foam insulation
It is a material based on polyurethane components, and mineral fillers. When laying pipelines often carried insulating metal products, to reduce heat loss. Enterprises in their work are a set of rules № 124.13330.2012 based on SNiP "Heating networks", which shows the requirements for the laying of underground channel-free networks of heat.
The characteristics and properties of the material according to GOST
The table demonstrates:
| Indicator | MRP-insulation |
| The value of the thermal conductivity coefficient | 0.044 W / (m- ° C) |
| bulk density | 250 ± 50 (insulating layer -100 kg / m3) |
| Compressive strength | 1,2Mpa |
| heat resistance | 150 degrees |
| Bound continuous remote insulation wetting control | Not required |
| repairability | can be repaired |
| Protection against mechanical damage | No need to install protection against external factors |
| The stability of the material, the faster the drying after the appearance of moisture. Another name for the index - water vapor permeability. | Drying is fast, the insulation can withstand moisture. |
| fire hazard | Material is not dangerous when trying to set fire to the flame is extinguished. |
| Toxicity | eco-friendly materials are used in layers. |
| The ratio of the material to corrosion | Initial medium has a neutral pH |
APM manufacture of a protective layer for improving the equipment that makes it possible to improve its performance. Due to the low water vapor permeability index, in isolation penetrates less condensed moisture. As a result, the quality characteristics of the material remain on top. No caking, there is no loss of strength in the formulation used.
main components
Penopolimermineralny material belong to the group of polyurethane rigid type. This foam raw material into which the mineral filler. As the last used ash or sand. Between these components there is no chemical reaction. After mixing the polymer and the mineral filler, the end result is a simple mixture.
As a rule, it is composed of polymer components and fine filler content. It provides a set of final product to combine properties into one of the two materials:
- polyurethane foams;
- Polimerbetonov.
This reduces the consumption of raw materials and the final cost of the final product. When it is composed of the mineral and other additives are formed highly filled systems. Significantly improved properties of the final product:
- Physical and chemical;
- Heat-physical;
- technology;
- Anticorrosive.
MRP insulation, to improve certain characteristics, may comprise synthetic substrate and various mineral fillers, resulting in a change of product modification.
The advantages of using
With its use of certain marked advantages when compared with other products, performing insulating functions on piping. Benefits depend largely on the properties of the material.
Pros of the considered pipe insulation:
- there is no deterioration of the physical characteristics of the material over time. Also, there is no reduction in the thickness of the applied layer;
- In pipeline dressed in such clothes there is a low absorption coefficient;
- Low thermal conductivity rate, whereby there is no large heat losses in the line. The experiments show that while sheathed penopolimermineralnoy insulation pipe lose no more than 4 percent of the heat. If parallels with other insulating materials such as mineral wool, the thermal conductivity is higher rate of heat loss and increased 2-3 times;
- Price of said shell to form lines is considerably lower than the other technologies familiar heat preservation;
- term use of pipelines is increased and is more than 30 years;
- line coated longer operate without repair and accidents, which significantly reduces the cost of maintenance and maintenance of pipelines;
- after breaking the tube will not occur deformation plating. Insulation dry and continue to serve;
- lines are not put on the sensors directed to an operation control state of the insulation layer.
Application area
Mass application as heat-insulating material in the construction of heating is observed. This occurs on the basis of the standard documentation, wherein said insulation part of the "representative designs of heating conduits." In particular, the set of rules developed for the underground laying of heat supply networks, there is a clear indication to this technology.
Not always come with a pipe coated with a protective layer, then it is done independently by pouring directly on the laying site. The maximum heating temperature of the material is allowed to 150 degrees, when said coolant temperature.
If the pipe passes over the surface of the earth, it is necessary to install an additional top layer protects from ultraviolet rays. This may be as a separate layer, and additives with special UV - absorbers.
mount technology
Application isolation occurs on the tube outside. Thus penopolimermineralnaya shell consists of three layers:
- the first cover consists of a material that protects the pipe from corrosion. Running a thickness up to 10 millimeters;
- followed by a base layer, is responsible for preservation of heat;
- the last and outermost layer is that protects the pipe from mechanical damage. Layer is more dense than the cover located underneath. Here, the thickness can be up to 15 millimeters
Application is made on the products with a diameter of 32-820 mm, up to 12 meters. As will be made, the tube does not matter. This method can be seamless or by welding. In the production of metal structures used to GOST 8731, 10704, 8733, 20295.
Layer with insulating properties applied to not only straight sections of the pipeline. For high-performance pipeline that with minimal loss of heat to take home, you must complete coverage. To do this, the layers are stacked on the following connection details:
- Adapter between the tubes;
- taps required for branching into the house;
- tees and other fittings that can be used when installing the heating main.
To learn how to properly seal the seams on pipe joints, see the exact instructions on installation of these products.
Life time
When the tube is hidden in the foam insulation from external influences penopolimermineralnoy weight, its service life is increased and reaches 30 years. It is not necessary to establish the state of the controllers. The pipe is protected from corrosion and freezing. The protective layer also retains physical properties unchanged over said period.
Plant - manufacturer warranty for a pipeline of 30 years.
Features of operation
The use of metal products are wrapped foam insulation allows the plotter to solve a lot of problems invariably arise during construction and in the future use of the networks. However, before installing the pipeline, you should know certain nuances that may arise during the operation:
- reliable waterproofing function is only present on the upper layer;
- metal dielectric component may cause a loss of the protective layer due to its premature failure. Because required before the applied insulation conduct degreasing pipe surface, it is necessary to remove dissolved oxygen, the hard salts contamination;
- in places where the pipeline is located above the ground, you need to frequently check the status. To do this, set the next check.
Check the following items:
- preservation of the insulation layer;
- MRP insulation if used for tubes, colored, means kasochnogo coating integrity;
- checked the pipe line. Intermediate and inspected manholes.
