For the construction of main and distribution pipelines, hot-rolled and cold rolled round steel pipes. This choice is due to the following significant advantages:
- Quick installation using manual electric arc welding in normal air atmosphere without supplying inert gases from bulky cylinders.
- Reliable operation under high pressure.
- Less expensive than analogs.
Also, a certain share of this material is consumed in the assembly of all kinds of metal structures and the manufacture of parts for all kinds of devices and mechanisms.
Comparison of cold-rolled round steel pipes with analogs
To better understand in which cases it is definitely necessary to use the described material, and in which cases it is worth thinking about selecting a more suitable replacement, it is useful to conduct comparison of cold-rolled round steel pipes with analogs.
Profile steel pipes
Cross section profile steel pipes Instead of a circle, they form a square, a rectangle and some other geometric shapes. This form turns out to be useful for more dense laying of pipelines in conditions of limited free space or installation of metal structures involving ferrous rolled products with flat surfaces.
Galvanized pipes
Due to a slight increase in cost galvanized pipes receive sufficient protection against corrosion under normal indoor and outdoor conditions in all weather conditions in all climatic zones. Pipelines not only become more durable, but also maintain a presentable appearance throughout their entire service life in accessible areas. Thin-walled varieties with low weight are ideal for installing storm drainage and ventilation systems.
Stainless steel pipes
The regulatory requirements for equipment in food industry enterprises are much stricter than for drinking water supply and distribution lines. This is due to the fact that the raw materials for food production contain various chemically active substances:
- organic acids;
- alkalis;
- alcohols, essential oils and components with complex molecular structures.
Many of them are capable of reacting with iron, which leads either to its destruction, resulting in equipment failure, or to the release of toxins, the appearance of which in food is unacceptable. The use of structural steel and galvanization in such conditions becomes simply dangerous and is not allowed by the standards. Most often, developers of equipment for food processing plants are helped out by stainless steel pipes, which at the present stage have almost completely replaced the previously used analogs from food-grade aluminum, non-ferrous metals, and occasionally, for example, in the shops of dairy canning factories, even from glass. In addition, due to their high heat resistance and chemical resistance, they are successfully used in high-power boiler houses, laboratories and the production of chemical reagents.
Pipes made of copper, brass and other non-ferrous metals and alloys
Copper is located to the right of hydrogen in the electrochemical voltage series, therefore it does not enter into substitution reactions in direct contact with the strongest organic acids and hydroxides non-metals, hydrogen halides. The only exception is concentrated nitric acid, because the products of the redox process are nitrogen oxides rather than molecular hydrogen gas, but it exists only in its pure form and cannot be present as an impurity in any raw material. This property of copper allows it to be successfully used in the construction of laboratory and industrial installations for the synthesis and breakdown of various chemical compounds.
Most copper alloys have another remarkable property of the starting material, namely very high thermal conductivity. That is why it is widely used for the manufacture of heat exchangers for boiler equipment and cooling radiators. brass tube, a certain supply of which never hurts to have in stock for scheduled and emergency repairs. Its thin wall practically does not interfere with the transfer of heat between liquids or gases located inside and outside, but at the same time does not allow the slightest possibility for their mixing.
Having correctly assessed not only the technical features and cost of each type of materials presented in the description, but also the most important nuances of the task at hand, even an ordinary home craftsman without special education will be able to make the optimal choice for his own needs, not to mention qualified engineers who solve more serious problems.