Stainless steel pipes. Scope. Types of profile pipes

Today in the construction market profile pipes have become very popular. Different materials are used for their production. But a special place is occupied by profile pipes made of stainless steel. They are distinguished by a rectangular or square shape. There is even an oval stainless steel pipe! So, thanks to a variety of forms the profile pipe from stainless steel allows to create a design, most suitable for the intended operating conditions.

Profile pipes from steel are issued with various forms of section and are applied in various industries and construction.

Areas of application and benefits

High technical characteristics of profile stainless steel pipes allow to use them in the following industries:

• chemical and oil industry;
• engineering;
• Food Industry;
• furniture production;
• creation of load-bearing structures of various structures;
• interior design;
• design of street constructions.

This is by no means a complete list of applications of profiled stainless steel pipe, as its popularity grows every year. In some types of construction work without products of this type can not do at all! Example, on the basis of a square or rectangular pipe from stainless steel overlappings and basic designs of inhabited, warehouse, commercial and industrial buildings.

Compared with similar indicators of pipe products, made of other materials, it is possible to speak about existence at the given products of the following advantages:

• convenience and simplicity of welding and installation works;
• profile pipes from stainless steel are characterized by high anticorrosive properties;
• square and rectangular stainless steel pipe are characterized by high performance due to the presence of stiffeners;
• relatively light weight.

Profile pipes are the basis of many buildings and structures for various purposes

Stainless steel profile pipes have opened a wide field of activity for designers. You can often see the exquisite beauty of the street structures, as well as stylish stair treads and curbs.

Of course, the cost of a profile pipe from stainless steel is rather high. But its use does not require a layer of protective coating, it does not need to be painted and sanded. And for some products it is generally contraindicated. In this case we are talking about a stainless steel pipe, polished to a mirror finish.

Types of profile steel products

Depending on the quality of the surface, the following types of products are distinguished:

• pipes with a mirror as internal, and the outer surface;
• polished stainless steel pipes;
• pipes with a matte surface.

According to the method of production, these products are divided into:

• hot-rolled pipes;
• cold-rolled pipes;
• seamless products.

Each type of product has its own characteristics, advantages and disadvantages.

Useful Information! Hot-deformed pipes are used as blanks for the production of rectangular and square cold-rolled pipes.

The desired shape of the pipes is given by a special rolling machine

Mirror profile pipes. features of application

The scope of a particular type of pipe largely depends on its shape.

Rectangular mirror tube. Pipes of this type are made of AISI steel 304. They are used for interior decoration, and for external finishing of facades of buildings. Characterized by a perfectly flat surface. Combined with the high quality of the metal, this property prevents the formation of bacteria and fungal deposits on the wall of the stainless mirror tube.. This feature has not escaped the attention of modern metallurgical plants. Using the same technology, they launched the production of profile stainless steel food pipes. These products allow you to automate food production. Here they are used to transport ingredients and food additives to the manufactured.

On the territory of our country their production is regulated by GOST 9940-81 and GOST 9941-81. Most often food pipes are made of steel of the 12X18H10T brand. But there are Western analogues of such products. In this case, AISI steel is also used to make food pipes 316, AISI 321. In addition, there is a special standard in the EU. It requires certification of food steel in accordance with ISO standards 6486/1. This applies, primarily, permissible dissolution threshold of chromium and nickel. In the above grades of food steel, it should not exceed 1%. Increased attention is paid to the level of excretion of various substances. In particular, food steel should not produce heavy metal ions. Rectangular mirror tubes are not used in heating and water supply systems.

Mirror profile pipes are used for furniture production, interior items, as various decorative elements

Square mirror tube. AISI steel is used as a raw material for the production of square mirror tubes 304. These products are used in such areas, as:

• engineering;
• installation of metal structures;
• for decorative purposes, etc..

The mirror surface also allows to use products of this type as a food pipe stainless steel. However, in accordance with applicable regulations, for their production the use of another is allowed, cheaper raw materials. In terms of cost savings, the best solution is to buy a stainless steel food pipe made of AISI steel 201. Products of this type are not used in heating and water supply systems.

Matt and polished profile pipes

Square matt steel pipe. The stainless steel pipe of electric welding of this type is made of AISI brand steel 304. Used as an element of such structures, as:

• supports;
• work sites;
• production racks, etc.. d.

Products are created from polished pipes, which do not have high aesthetic requirements for their appearance

Useful Information! In general, matt stainless steel electric welded pipe is suitable for creating metal products, to the appearance and decorativeness of which high requirements are not imposed.

Rectangular polished pipe. Rectangular steel pipes belong to this type, having a decorative look due to that, that their surface is polished in a special way. Made of AISI steel 304.

Pipe wall thickness: what is the importance of this parameter

As you know, the cross section of stainless steel pipelines of water supply and heating systems is only round. This is due to the fact, that highway, in the outlines of which there are different angles, in places of bends can get clogged quickly. Therefore in this case it is better to refuse use of a corrosion-proof square or rectangular pipe.

Another thing, when it comes to the automotive industry, furniture industry or, example, aerospace industry. Here is a thin-walled stainless steel tube, as well as a rectangular special place. After all, despite the relatively light weight, due to the presence of stiffeners, it is able to withstand high loads. Alloy or carbon steel is used for the production of profile thin-walled electric welded stainless steel pipes.

The use of products of this type as loaded elements of metal structures is possible only in the absence of deviations from the specified geometric dimensions. Otherwise, under the influence of external forces, the pipe will simply fold.

Production of a profile thick-walled stainless steel pipe is based on application of technology of hot deformation and is regulated by requirements of GOST 8734-75. Welding of the butt joint is performed by electric arc welding. Its presence, of course, reduces the strength of thick-walled stainless steel pipe, but insignificant (total on 10-15%).

Its thickness resistance to loads and possibility of use in this or that sphere depend on thickness of walls of a profile pipe

The scope of application of this product is very diverse. Thick-walled pipes are used to make decorative fences, expensive furniture, medical equipment. Rectangular products with a cross section of 40x20 are most often used for the frames of various chairs. And square thick-walled pipes 50x50 are used as stair railings of supermarkets. Pipe hire of this type is widely used in shipbuilding, as the thick-walled stainless steel pipe is able to withstand the negative effects of corrosion.

An alternative to profile pipes

In conclusion, it should be noted, that it is not always advisable to use profile products. About that, that such a stainless steel pipe cannot be used for heating and water supply, it has already been said. Good, the domestic market provides an opportunity for optimal choice. in addition, The World Wide Web allows you to monitor the state of affairs in this segment remotely. And it is literally full of proposals for the sale of stainless steel pipes for heating and water supply.

However, here is another nuance. Modern heating and water supply lines are being built, mainly, from plastic PPR round pipes. But only the knowledge of that, how to connect a steel pipe with polypropylene, will not be enough. To do this, you will need to order a transition fitting from a round diameter to a rectangular section.

Importantly! So that there are no complaints about the connection of the steel pipe with polypropylene, it will be necessary to specify the exact dimensions of the parts, mating.

But back to the question of expediency. Example, to organize the chimney in a private house or cottage, it is best to use a round stainless steel sandwich pipe. This solution will simplify the installation of the structure, reduce money costs and ensure high quality operation of the entire system of toxic gases.

With all the advantages of profile pipes, in some cases, round products should be used instead - for example, in the chimney system

The sandwich chimney consists of 2 pipes. Between them is a basalt layer. This material is able to withstand temperatures up to +750 ° C and is characterized by a low coefficient of thermal conductivity. The connection of the sandwich pipe with the chimney elements is made "pipe to pipe" and does not require additional fastening. The inner and outer tubes are made of austenitic steel. This solution keeps the geometry of the sandwich chimney and provides rigidity of the frame.

To increase resistance to overheating, the structure is often enameled. As a result, the temperature threshold of the sandwich flue rises to the mark +900? WITH. But the effect of the presence of enamel coating is not limited to this. Sandwich chimneys with such a layer are not subject to the action of condensate formed on their walls. The conductivity of this equipment is also significantly improved. In other words, The efficiency of the enameled sandwich chimney increases.

in addition, some homeowners may have questions about stainless steel profile pipes. Because they cannot be used to create water supply and heating systems, whether it is possible to use them to protect plastic pipes? But using them as a cover is also impractical. In this case, the total weight of the structures of water supply and heating systems will exceed all reasonable limits.

However, the areas of application of profile stainless steel pipes are very diverse. Therefore, you can do without additional fantasies. And although each of us has the right to conduct experiments, it is better to use time-tested solutions for these products. It will be more reliable.