Steel products have long been used for the laying of utilities in different directions. Due to their reliable performance, they continue to actively acquire, despite the emergence of many new products of plastic and polyethylene.
Variations and application
The increasing popularity of all types of steel products are galvanized pipes, which differ in purpose:
- to create a water supply;
- of household and business communications;
- gas pipelines;
- Fitting the heating system.
Depending on the application they are executed with different diameters, according to established standards:
- For carrying water and gas pipes are used, produced according to GOST 3262;
- Electrically products meet the standards of GOST 10704;
- Seamless and profile.
To install the plumbing in an apartment, as well as create a heating system using pipes made according to GOST 3265. They differ in a number of advantages:
- Corrosion resistance. This is particularly important in the use of steel products. Thanks to the galvanized coating water is not covered with rust, and is much longer;
- Operating systems galvanized metal period exceeds 25 years .;
- Compared with conventional metallic elements of the system, they are much easier. This simplifies operation and transportation of the product;
- Easy to create the desired structure. They can be cut into the desired size, weld and connect in a certain configuration.
Outwardly, all steel products look the same, they differ in the thickness of the walls. To create a plumbing and heating in the living room uses elements of medium accuracy class. If you intend to external application, then require the isolation of galvanized steel pipes, otherwise the liquid in the pipe can simply freeze and create a lot of problems with critical houses.
To begin to understand the types and characteristics of insulation.
insulation types
The coating the insulating layer may be applied to the inner and outer sides, on the pipeline with a diameter of components 57 to 530 mm. For the application of the upper layer are extruded polyethylene. Isolation of the inner walls is carried out by liquid heaters. Each method of insulation has positive and negative aspects that must be considered.
Penopolimernaya
MRP insulation conducted in three protective layers:
- Origin prevents liquid on the surface, protecting from corrosion processes. layer density reaches 100 mm;
- The second insulating layer. Penopolimerny material has a porous structure, it can increase the temperature of the fluid passing. The density of this layer depends on climatic living conditions;
- The upper layer was used to protect against mechanical damage, and also for waterproofing. The density is 15 mm. It is from this figure depends on the strength of the entire structure.
MRP-insulated pipe manufactured in the factory as a finished product. Used for laying utilities underground or open pit.
polyurethane
Polyurethane insulation for pipes made from galvanized materials and Izolan Varatek. To increase the reliability of the insulation coating has an upper plated layer.
Products with the insulating material is manufactured in accordance with GOST 30732. According to the regulations covering should possess the following characteristics:
- layer thickness should be not less than 60 kg per cubic meter;
- coating durability upon deformation greater than 0.3 MPa;
- the thermal conductivity coefficient of 0.033 W at a heating temperature of 50 ° C.
These parameters allow the use of products with polyurethane foam insulation for the construction of heating mains pressurized to 1.5 MPa.
Reinforced (double)
Such insulation coating protects the metal elements from exposure to electrical current. It consists of several layers, which are divided into primary and secondary part. Reinforced insulation galvanized steel pipes are regulated GOST 16703 and is a unitary construction system that provides protection from elektropovrezhdeny comparable with double insulation.
This type of product is used to create large heating systems and gas pipelines, the repair of the building or office. They are not protected from corrosion processes outside, thanks to their service life reaches over 30 years. Thus to establish and collect in design can be ground with high humidity or even water. The use of these tubes solves many problems with installing the outer pipe. They are not afraid of changes in temperature and bad weather conditions, which will allow to use them in places of residence with a harsh climate.
internal
This type of insulation is carried out at the factory of galvanized metal products and is divided into two types:
- Anticorrosion. It is necessary for protection against rust and corrosion of the inner walls of pipes. The inner surface of the most vulnerable point, since direct contact with the liquid, and also experiences a high pressure on the wall of the structure;
- Anti-friction. Its objective is to increase the design capacity, as well as increased resistance to internal friction accompanying the liquid under high pressure.
Using internal insulation allows to increase the useful life and protect from falling into the water biologically harmful microorganisms, chemicals, reduces the level of roughness.
Products with the inner protective layer characterized by:
- Resistance to deformation. Isolation increases the elasticity of the walls, allowing to withstand high temperature;
- Protection against corrosion and rust;
- High stability coefficient by waterhammer pressure drops.
The choice of interior insulation depends on the place of operation of water supply.
extruded polyethylene
Insulation tubes of galvanized steel by extruded polyethylene takes place in an industrial environment. It has three layers:
- The inner layer is made of epoxy resin necessary to remove small defects on the surface of the pipe;
- Middle layer serves as a fixing base;
- Upper plated layer is made of extruded polyethylene.
Due to the design layer cake, products with such insulation has a number of advantages:
- Environmentally friendly. Polyethylene is environmentally friendly and does not harm human health;
- Hydroresistant increases the service life of metal products;
- Increased stability factor to temperature and pressure surges;
- Antikorozziynaya protection. Due excluded waterproof contact with the aggressive medium for the metal. This protects the pipe from rust.
Resistance to high temperatures allows the use of active material for insulating chimney and heating systems.
bituminous mastic
Insulation tubes using bituminous mastic is performed only for protection against moisture penetration, that is, the occurrence of metal corrosion. On the other variables (pressure, resistance, thermal conductivity), it has no effect.
Insulation work is carried out according to the standards defined by the standards of GOST 5116. It is applied in several layers:
- Primed first surface of the article for better adhesion to the metal surface;
- Further mastic applied;
- The third layer is laid non-woven fabric, which acts as a protection against moisture;
- The last layer - wrapper protects the tube from mechanical damage.
I use products with bituminous mastic to create water pipes. The recommended not to use as a material for constituting the heating system, since they do not tolerate temperatures below 10 and above 40 degrees.
Increase characteristics galvanized metal pipes capable of any insulation. To do this, it is important to choose it correctly, in accordance with the tasks. Therefore, when choosing a product with insulation learn all the technical specifications carefully to avoid further set of problems.
