Communication systems consist of channels of a certain size. In many of them, a chrysotile cement pipe, the main substance of which is a variety of asbestos, can be used as a conductive element. This component is less safe than the amphibole analogue, which is banned in European countries due to carcinogenic activity.
Operational advantages and disadvantages
There are a lot of materials used for the production of pipelines . Each of them has its own merits, depending on which conclusions are drawn about the possibility of use in a particular situation. It is further proposed to consider what positive qualities chrysotile cement pipes have.
The basic advantages include:
- the possibility of operation when exposed to aggressive environments;
- low level of thermal conductivity;
- simple installation technology;
- lack of corrosion processes during use;
- long service life.
Of the minuses, excessive fragility should be noted. This causes certain difficulties when laying or installing elements. Products are mostly cracked by point mechanical impact.
Classification and Application
Chrysotile cement pipes can be divided into two large categories. The first of these is pressure-type products. Such elements have increased strength, so they can be used in communication networks with internal pressure. However, they are not allowed to be used as heating mains for hospitals, kindergartens, schools and other specialized institutions.
The second category is represented by non-pressure products. The most popular pipe is chrysotile cement BNT 100 mm. It is often purchased to create a sewer system of a private house or drainage site design. Sometimes cables are laid inside the elements for organizing communication channels.
Non-pressure products are also actively used as chimneys, if the temperature of the exhaust gases does not exceed 300 degrees. They can be useful in landscaping. With their help, flower beds, urns are arranged, and columns are also erected. In some cases, the chrysotile cement pipe BNT plays the role of the base support pillar. The number of load-bearing elements is determined by the mass of the structure and the cross-section of the strapping bars.
Technical characteristics of non-pressure products
With the help of the presented products, communication systems are generally arranged in which there is no pressure. In this regard, it is proposed to consider the technical indicators of non-pressure elements.
Parameters | A type |
BNT 100 | BNT 150 | BNT 200 |
Outer diameter in centimeters | 11.8 | 16.1 | 21.3 |
Sidewall thickness in millimeters | 9 | 10 | eleven |
Length in meters | 3.95 |
Weight per linear meter in kilograms | 6.1 | 9,4 | 18 |
Chrysotile cement pipes have such characteristics. GOST for their production (GOST 31416-2009) allows you to control quality. In the paragraphs of the documentation the basic requirements for the final product are given.
On the surface of the products should not be chips and cracks. It is allowed to deviate from straightness by no more than 12-24 mm (depending on the length of the element). The value of the tested hydraulic pressure for non-pressure analogues should be more than 0.4 MPa.
Product labeling
To simplify the selection process, the chrysotile cement pipe must be labeled in some way. Typically, a special marking is applied to the outside of the product with paint. The inscription contains information about the manufacturer, type of element, conditional pass and lot number.
Transportation and storage
When transporting items must be securely fastened. In the process of unloading, it is not allowed to drop products directly from the machine. Pipe laying should be carried out in stacks on a site with a flat surface. If there are bumps and hollows in the storage place, then wooden gaskets are used as the basis. In this case, it is desirable to fix the lowest row.
Manufacturing process
A chrysotile cement pipe is made from a fiber reinforced construction mixture. First of all, the main component is crushed mechanically. Next, a liquid composition is prepared. Only 85 percent of chrysotile asbestos is placed on 85 percent of the binder . In production, raw materials that meet the requirements of these standards should be used. An important role is played by the activity of radionuclides. Its values must comply with the standards that have been approved by GOST clauses.
A bit about accessories
The main element is the chrysotile cement pipe. However, it usually comes with special couplings. When carrying out work, parts of the same class must be used. As for pressure analogues, they are also equipped with o-rings made of rubber.
Warranty
If the consumer complied with the recommended rules for storage, operation and transportation of products, then he can count on the period during which the replacement of low-quality elements can be made. This period is not more than 1 year from the date of shipment by the manufacturer.
Features of installation work
When laying pipelines, there is no need to use heavy equipment or special equipment for connection. Docking is carried out by means of polyethylene or chrysotile cement couplings. If necessary, rubber seals are inserted , due to which it is possible to achieve acceptable sealing. Under pressure, the gaskets fit snugly against the surface. The radial clearance located between the coupling and the pipe itself allows you to get the necessary bend when connecting. A communication channel without compensators is considered inexpensive, but at the same time reliable.
It should be noted that for drainage systems not ordinary elements are used, but perforated. Through the holes, excess moisture from the site falls directly into the channel, after which it is discharged into the collector. To avoid blockages, it is recommended to use a permeable membrane with a mound of gravel.
Final part
For communication networks of a private house, a chrysotile cement pipe of 100 mm is usually purchased, since it is in many cases the best option. If necessary, you can buy items with a larger or smaller diameter. However, it must be remembered that with an increase in the cross section, the side walls of the product significantly thicken, so the mass increases significantly. For the same reason, the cost of production rises.