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The concept of assortment

What is this “assortment”? The meaning of the word means a list of a specific product presented on the market or a list of products produced by a manufacturer.

If we take profile pipes, the range of these products includes all types of products that are produced at enterprises or located in suppliers’ warehouses.

It is convenient to present the range of profile pipes in the form of tables. They contain, among which square and rectangular parts of a wide range of products are most often used.

Profile is one of the main parameters of the parts presented in the table. In addition, it may indicate the steel grade, profile size, wall thickness of the products, yield strength, manufacturing method, and other characteristics, after reviewing which we have a complete understanding of the product.

GOST 13663 86

In this State Standard profile pipes made of steel of both seamless and welded types for general purpose are presented. For production they are used various groups grades of carbon and alloy steel.
The linear parameters of profile steel risers are recorded in special tables that can be easily found on the Internet.

Elements can be:

• with the presence of hollow ribs;
• flat oval shapes;
• oval and teardrop-shaped sections;
• square();
• rectangular ().

The assortment provides for the presence of 2 groups of profile pipes in accordance with GOST:

• products of group A: standardized mechanical properties become;
• products of group B: availability is standardized chemical elements in a specific proportion, the mechanical characteristics of the base metal.

The index of the product group when marking it - A or B, is placed before the steel grades.

The assortment provides for the presence of steel profile pipes with and without heat treatment.

Non-experts in this industry sometimes talk about the range of steel profile pipes GOST 13633 86. It turns out that such a Standard does not exist at all, and the numbers are probably simply mixed up and instead of 13663 they call 13633. That's all. So you need to be extremely careful and precise before talking about State Standards.

Let's focus on rectangular and square elements, which are more in demand in comparison with analogues of other sections.

Rectangular pipes GOST 8645 68

As stipulated in the Standard and accordingly, pipes can be produced:

• seamless method (hot and cold deformation);
• welding method (electric welding with hot and cold calibration, furnace welding).

As GOST 8645 68 in practical activities they use square analogues of GOST 8639 82, the range of which is also quite large.

The shape of the rectangular elements should be the same as in the drawing.

Table 1 shows some parameters of rectangular products general purpose.

Table 1

Features of application

Risers are manufactured in close correlation between linear parameters and wall thickness. Thanks to the stiffening ribs, the design of rectangular parts is durable, reliable, long term operation and other positive properties.

Rectangular risers are used in:

• construction industry. With their help, load-bearing structures are created for sports, cultural and mass facilities, offices, and other premises. Rectangular parts make ideal railings and various decorative fences;
• mechanical engineering. Modern tractors, agricultural machinery, heavy vehicles, trailers are mounted on frames made of hollow rectangular risers. Low weight combined with high strength is the main condition for creating reliable metal structures;
• agriculture. Constructed greenhouses, greenhouses, seed sheds, equipment, and other structures can easily withstand serious both transverse and longitudinal loads;
• furniture industry. There are such risers in every school desk, in every chair. They supply furniture for medical and public institutions. Together with wooden elements they look very aesthetically pleasing.

It is impossible to do without them when constructing the frames of trade pavilions, canopies, temporary and permanent advertising structures.

With their help, devices are installed that facilitate the performance of work indoors and outdoors.

Effective interaction with planes helps expand the range of applications of products. Thanks to the rectangularity of the structural parts, the range of functional purposes of the final product is significantly expanded.

Despite the savings in metal during production, rectangular risers are a fairly high-quality, sought-after product. Rectangular parts are available to consumers, which is associated with the competitive cost of the product and high quality.

GOST 8639 82

This Standard deals with the range of square profile pipes, for the manufacture of which the following are used:

• seamless method (hot- and cold-formed elements);
• electric welding (cold-deformed, hot-calibrated parts).

The document applies to the range of profile pipes GOST 8639 82 square section, for the production of which furnace welding was also used.

Depending on the manufacturing method, purpose, steel grades, parts can be of different lengths with different wall thicknesses, different sections and external dimensions (Table 2):

table 2

The maximum error in total length is no more than +100 mm.

The drawing indicates the form, and the table. 3 for dimensions and other profile parameters square pipes GOST 8639 82.

Table 3

Assortment of square profile pipe GOST 30245 2003

This Standard specifies not only the parameters of square products, but also the technology for their production.

One of the main areas of application for such parts is capital construction.

For absolute confidence in the strength and reliability of structures, for their construction it is necessary to use only a range of steel profile pipes that comply with GOST.

The production of a wide range of profile square risers as a variety of rectangular products is carried out accordingly. Elements can be dimensional or non-dimensional. If necessary, you can purchase parts that are multiples of the measurements.

Slicing individual elements finished products, enterprises adhere to the State Standard.

The document emphasizes that:

• the minimum length of parts cannot be less than 4 m, and the maximum - no more than 13 m;
• more often than others, buyers are interested in finished products with a length of 6 m and 12 m (it is precisely the elements with such linear parameters that can be found most often in construction stores);
• when cutting dimensional parts, you must adhere to maximum deviations about up to 60 mm;
• the required length is determined by the customer, but it must be within the limits specified in the regulatory documents.

For square-section products, the Standard requires compliance with the length of the sides, linear dimensions which can range from 50 mm to 300 mm. The assortment of goods provides for the correspondence of the thickness of the element to its size. With an increase in the last parameter, the wall thickness should also increase (minimum value - 2 mm, maximum - 14 mm).

Some designs provide for the use of risers custom size such parameters: cross-sectional area, wall thickness, length. Such elements must be tested. Produced parts must comply Technical specifications state regulatory body that assesses their level of safety. The parts are marked with the TU designation.

The shape of the parts is indicated in the drawing.


With separate parameters for some product sizes
can be found in table. 4.

Table 4

About performance characteristics and areas of application

The design of a square riser is a closed profile, for the formation of which a metal strip is used. The quality characteristics that appear during product operation depend on the design features and material of manufacture.

These products are different:

• increased resistance to bending and torsion;
• strength;
• reliability;
• small weight;
• long service life.

Today it is difficult to imagine human activity without square risers. They found wide application in different areas.

Profiles are the basis of modern industrial and domestic construction. When reconstructing old construction sites and constructing new ones, square-section parts are used to create roofing frames and floors.

It is impossible to imagine functioning without them:

• furniture industry (shelves, racks, chairs, tables, cabinets);
• mechanisms engineering industry;
• agriculture (sheds, garages, utility rooms, livestock farms);
• advertising business, other areas of human life.

Compared to analogs with a round cross-section, square and rectangular profiles bend after high loads. Moreover, after the load ceases, the riser takes its original position. This is their strength and reliability.

Round products, under a similar impact, can not only be deformed, but also completely collapse.

Production stages

The range of square steel profile pipes GOST 30245 2003 provides for the use of sheet steel grades from carbon and low-alloy groups with sheet thicknesses of 3 mm, 4 mm and higher. Individual orders are produced using high-quality rolled steel grades.

After determining the manufacturing method and product sections, production begins, which involves several stages:

1. Unwinding and cutting rolled sheets into strips of a certain width.
2. Forming a long strip from cut strips by welding.
3. Feeding the tape, forming it into products with a square cross-section on a molding machine.
4. Welding the connecting longitudinal seam formed as a result of bending the workpiece.
5. Removal to a minimum (remaining no more than 0.5 mm - 1 mm) of flash from the weld.
6. Carrying out quality control activities welds. If deficiencies are found, they are removed.
7. Cutting high-quality pieces of products of the required length.
8. Packaging of finished elements.

Finished packaged products are sent to a warehouse for storage.

Video

Gutters. You should know it!

The drainage system is one of the most important systems exterior structure of the house. This design is not just a decoration for the home, or a tribute to fashion. Gutters are designed to collect and direct the flow of rainwater from the roof of a building to a specially designated place away from the foundation of the building.

How to calculate drainage

Working correctly drainage system protects the roof, roofing, walls of the house, building base and foundation from premature wear. Not to mention the aesthetic component of the benefits of gutters.

They save you from dirt near the house, puddles near the basement and accidental falls. Let's consider the simplest questions about what the drainage system of a residential building should be like. What size should it be drainpipes? The size of the pipes depends on what part of the country you live in, the average annual rainfall and the area of ​​the part of the roof for which the drainage is calculated.


In a temperate climate, the calculation takes into account that a 1.5 cm² cross-section of the drain is sufficient to drain water from 1 m² of roofing. Based on this, a pipe with a diameter of 10 cm is capable of draining water from a roof area of ​​about 53 meters.

What is the best material to use for gutters and downspouts?

The most common materials are aluminum and vinyl. But you can use steel and copper gutters. In this case, the determining factor may be the price of the product.

Installing copper gutters will be expensive, but with proper maintenance, these gutters will last for decades. If you live in an area with little temperature variation, vinyl gutters are a smart choice.

Seamless gutters or not? Seamless gutters and gutters, according to experts, are the best option. These gutters are made to specific dimensions. This type of gutters will cost more for the home owner. Precast gutters leak and sag over time. With any choice, it is advisable that the installation of gutters be carried out by a specialist in this field of construction.

Laying utilities

Construction of any facility, be it residential apartment house or manufacturing facility, cannot do without arranging communications that supply heat, water and gas to the building.

Considering the complexity and volume of this type of work, it would be advisable and profitable to contact specialists offering services in the field of installation and connection engineering communications all kinds.

The use of carefully selected materials and modern designs technology allows us to complete the work in the shortest possible time, guarantee its quality and offer customers the optimal price level for the services offered.

Trench or trenchless method

Depending on the purpose of the object and the characteristics of the soil, work on arranging communications can be carried out using a trench or trenchless method.

The first is considered traditional - it requires time and the use of excavator equipment, as well as the need to prepare a place for the temporary placement of soil extracted from the ground, the place of which will be taken by pipes and their finishing.

In turn, the trenchless method is a modern one, developed in connection with the need to arrange communications in difficult-to-pass places underground, when the task is to preserve transport routes and buildings on its surface. The main methods of trenchless installation of communications are horizontal or inclined drilling, soil punching, puncture, carried out using special equipment and techniques that guarantee the integrity of the soil layer and the safety of objects.

Each type of communications requires special measures to be taken during the development of pits and digging trenches.

So, water supply networks They are distinguished by their ramifications and the need to arrange frequent connections to nearby objects. Their arrangement requires, first of all, compliance with the conditions to preserve the conductive properties and protect against negative external influence, as well as economical operation and the possibility of maintenance and periodic monitoring.

In order to carry out all types of work economically and quickly, construction and housing and communal services organizations rent construction equipment and technology.

In its turn, heating network differ in the significant size of the pipe diameter.

Their design requires care and attention, as well as the selection of materials, on the one hand, resistant to prolonged thermal effects, on the other hand, capable of withstanding a decrease in temperature in the ground in winter period, and thirdly, to ensure the preservation of the coolant temperature.

Therefore, the design of work on the arrangement of heating networks is entrusted to experienced specialists who guarantee compliance with all necessary conditions.

The scope of application of profile pipes is extremely diverse, so it is worth talking about their advantages and disadvantages in more detail. In this material we will talk about the range of profiled pipes, as well as what qualities of products you should pay attention to when purchasing them.

The very concept of “assortment” implies big variety varieties and types of certain products, and in this context - profile pipes. As a rule, it helps to determine the presence various types products classified according to a number of parameters, which are presented by manufacturers or at wholesale or retail points of sale.

The full range of profile pipes includes all names of these products, manufactured in accordance with GOSTs, without exception, and also describes the quality characteristics of each category in all possible modifications.

In general, the classification of profile pipes can be carried out according to various indicators. One of the most significant characteristics is the profile shape.

There are the following types of products:

• oval;
• flat oval;
• square;
• rectangular shape;
• with hollow ribs;
• with a specially shaped profile.

It is worth noting that the range of steel profile pipes is developed separately for each type of profile in full compliance with GOSTs.

In addition, the variety of profile pipes is also determined by such factors as:

• method of production of pipe products - welded, cold- or hot-rolled);
• raw materials from which pipes are made;
• methods for processing end parts;
• industry where the use of certain types of pipes is envisaged.

By the size of the product range presented on the market by the manufacturer, one can judge its potential, capabilities and scale of production. And although expanding the list requires significant costs, it still indicates the stability of the enterprise.

Detailed description of the assortment

Profile pipes have found very widespread use in the process of assembling metal structures for various industrial facilities. They are not only capable of replacing bars used for load-bearing structures, but also have a small weight and are inexpensive.

In addition, when choosing the type of pipes, it is worth considering the weight linear meter such products.

Most often, square rectangular pipes with the following parameters are in demand:

• 15×15 mm;
• 20×20 mm;
• 25×25 mm;
• 30×30 mm;
• 40×40 mm;
• 60×60 mm;
• 80×80 mm;
• 100×160 mm;
• 100×100 mm.

Advantages and disadvantages of various profiled pipes

All pipes whose cross-sectional shape is not round are called profiled. The most common types are square rectangular steel pipes. The most common profile sizes are 25, 60, 100 mm and 40×80 mm, 50×50 mm and 40×100 mm.

It is worth noting that thanks to the variety of standard sizes of profiled pipes produced, it has become possible to construct increasingly complex structures.

Among the main advantages of profile pipes are:

• low metal content, which allows saving up to 25% of raw materials for the construction of a particular facility;
• due to the ease of installation, the construction of the structure is carried out very quickly;
• convenience in sanitary and antiseptic treatment, hygiene;
• full compliance with standards fire safety;
• possibility of assembling structures of increased complexity.

Area of ​​use of profile pipes

Due to the variety of sections and shapes of profile pipes, their scope of application is extremely wide.

In particular, the use of such products would be appropriate in the following cases:

1. To assemble the frame of buildings, if there is a need to save metal, profile pipes with a cross-section of 60×30 mm are often used.
2. Pipes with dimensions of 15×15 mm, 40×60 mm, 60 mm and 100 mm are acceptable as structural elements.
3. Among the advantages of products with parameters 25 × 25 mm and others, one can name the moment of resistance of a profile pipe, that is, its strength, low weight, high speed and ease of assembly of metal structures from them, as well as high tightness.
4. The good performance characteristics of profile pipes, as well as their versatility, make it possible to use them in almost any field of activity. In particular, profiled products with dimensions of 25×250 mm are actively used in the mechanical engineering industry. But 60x30 mm pipes are in demand for assembling billboards and banners.
5. In the construction of large residential buildings, public buildings, as well as warehouses and garages, pipes with parameters of 40x60 mm, as well as many other types, are in great demand.

Thus, it can be noted that pipes of various profiles, in particular square, rectangular and other types, are very common in the construction of facilities for various purposes. If you need to build lightweight partitions or structures that will not bear a large load, then profiled pipes with thin walls are perfect for these purposes.

Profile pipe is a type of steel pipe. This product category includes a wide range of rolled metal products. It is in high demand among construction, manufacturing, agricultural and engineering enterprises. How do these products differ and how to choose the right product from the range of profile pipes? Buyers have probably asked themselves similar questions. Experts will help you understand the intricacies of the purchase. large manufacturers rolled metal products.

What is a profile pipe

A profile pipe is a type of high-quality hollow metal. The profile of this pipe is characterized by several but different features from the round one. Thus, the options are:

• square;
• rectangular;
• oval;
• flat-oval;
• arched.

The spread has reached pipes with square and rectangular profiles, which is explained by correct form sections.

Assortment of profile pipes

Speaking about assortment (this term comes from the concept of grade), we mean a list of varieties of products of a given type, which is offered on the goods market. Thus, the range of profile pipes includes rolled metal products, general characteristics which is a hollow structure and non-circular cross-section. However, these products also have differences:

• section shape;
• material of manufacture;
• production technology;
• profile size;
• wall thickness.

Profile form

This parameter is considered fundamental, since the range of products with different shapes section (profile) is indicated separately.

Types by shape:

• Rectangular pipe. This type of rolled metal has 4 stiffening ribs, which makes it resistant to tearing and deflection. Equally important is the low weight, which is achieved due to the hollow structure. In addition to the benefits of the product, it is worth mentioning convenient storage and ease of transportation.
• Square pipe. This product combines the aforementioned advantages of a rectangular pipe, while being characterized by compact dimensions. You can’t do without a range of profile square pipes in cases of tough limited space.
• Oval, flat-oval, arched. These options are often used when special requirements from the object side. Polygonal and special profiles. Profile pipes with a polygonal cut or additional notches are also sold, but they are produced to individual orders.

Receiving technologies

All types of profile pipes, regardless of the profile shape, are produced using similar technologies.

There are 3 of them in total.

1. Cold rolled. According to cold-rolled technology, the starting material for the production of profile pipes is ordinary round pipes suitable diameter. The process comes down to rolling a round pipe on special machines. As a result, the product is given required form.
2. Hot-formed. This manufacturing technology is similar to cold-rolled in that a round pipe is used as the starting material. However, there are also differences - before rolling, the pipe is heated to high temperature. Thanks to this, high internal stress does not arise in the metal and special performance characteristics are imparted to the finished products.
3. Welded. Production by the welded method involves the use of pieces rather than a round pipe sheet metal. They are rolled in to give the desired profile, and then connect the edges by welding.

GOST requirements for the range of profile pipes

Pipes with a profile other than round are considered one of the most important segments of all rolled metal products. They are widely used in construction and other important projects, so they must be manufactured to meet stringent requirements. According to GOST 30245-2003, the range of profile pipes is characterized as bent closed welded products with a profile in the form of a rectangle or square.

However, this GOST is far from the only regulatory document. For each type of profile pipe, additional requirements are provided.

Manufacturing materials

One more distinctive feature The range of profile pipes is called the material. The most commonly used is steel. She may be:

• low alloy;
• carbon;
• stainless.

Each is assigned a nomenclature name. It certainly indicates the grade of steel, each of which belongs to one or another group. This characteristic significantly affects strength, flexibility, durability and other indicators finished product(including cost). Less common are pipes made from other materials, such as aluminum.

Square pipes: varieties

With a square profile, they vary depending on the production technology. The range of cold-formed profile pipes includes products with a cross-section of 10-120 mm. The wall thickness can reach 1-8 mm.

Hot deformation products are produced with a cross-section of 30-140 mm, thickness can be 4-14 mm. Electric-welded profile pipes have a thickness of 1-5 mm and a cross-sectional size of 10-100 mm.

Rectangular section

Pipes with a rectangular cross-section vary in side sizes and wall thickness.

The smallest size pipes are 15*10 mm, and the largest are 230*100 mm. Wall thickness varies from 1 to 14 mm. The larger the section size, the greater the wall thickness should be. This allows the pipes to withstand increased loads and serve for many years.

Advantages

The range of profile steel pipes has several advantages that allow them to be used in construction and industry:

• Among all rolled metal products, profile pipes have the lowest metal consumption, which significantly reduces weight and cost finished design.
• Such products are easy to bend, cut and weld, which reduces the speed of installation of products.
• Taking into account sanitary and hygienic standards in production makes them easy to maintain.
• Made of steel, the pipes are completely fireproof.

The buyer selects a product based on the main requirements of the project being implemented, the scope of application and operating features. In other words, there is not one perfect solution for two projects, completely different in direction, cost and application features.

Having examined the characteristics and differences of profile pipes, we can conclude: this type of rolled metal is diverse and can be extremely useful in many areas of industry. However, those products that were manufactured taking into account accepted requirements and standards will be durable and wear-resistant. For this reason, before purchasing rolled metal, you should read the supporting documents.

Construction, automobile and other industries require not only round pipes, but also rectangular steel pipes and rectangular steel pipes. These profile products can withstand loads greater than conventional round elements, and this means safety and long-term operation of the building structure.

The profile rectangular pipe has also proven itself well in the production of consumer goods - in the manufacture of furniture and other frame products, in the construction of fences and enclosures, greenhouses and pavilions. The popular sizes of standard rectangular and square pipes according to GOST 8645-68 are as follows:

Section of square pipes:

1. Sectional cross-section: 10 x 10 mm/180 x 180 mm;
2. Wall thickness: 0.8/14.0 mm;
3. Weight of one linear meter: 0.22 kg/70.3 kg;
4. Standardization according to: GOST 8639-82;

Rectangular products:

1. Cross section: 15 x 10 mm to 180 x 150 mm;
2. Wall thickness: 0.8mm/12.0mm;
3. Weight of one linear meter: 0.348 kg/55.71 kg;
4. Standardization according to: GOST 8645-68;
5. Technical requirements according to: GOST 13663-86.

Production of rectangular profile products

The metallurgical industry has mastered the production of the following metal products:

1. Rectangular steel pipes intended for the construction of load-bearing structures. Iron pipes rectangular cross-sections look more aesthetically pleasing, although in terms of strength criteria I-beams would be preferable;
2. For lightweight, low weight structures where design is critical and appearance, produce seamless rectangular stainless steel pipes, the surface of which is pre-ground and polished;

Pipe metal products in the shape of a rectangle or square are used only for the construction of any metal structures: they are used very rarely for laying pipelines for the following reasons:

1. Any steel rectangular pipe has a smaller internal volume than the product round shape, which means that in 1 linear meter of such a product, less liquid or gas passes in 1 hour than in a conventional circular pipeline. Thus, the productivity of pumping the working fluid through steel pipes of square or rectangular cross-section is much lower;
2. A rectangular metal pipe can withstand tensile, torsional and bending loads well, but it can withstand internal loads much worse. That is, at high internal pressure of the working medium steel pipe a square or rectangular profile may crack or even rupture;
3. Round pipes weigh less than rectangular products, which means that total weight there will be more square highways;

The standardized dimensions of the profile pipe affect the scope of their application:

1. The dimensions of the profile pipe 60 x 30 mm mean that these are products with low metal consumption, and they can be used to save construction costs;
2. The dimensions of profiled square or rectangular metal pipes 15 x 15 mm, 40 x 60 mm, 60 x 60 and 100 x 100 mm are used when assembling structures of various sizes and complexity;
3. The dimensions of the profile pipes 25 x 25 mm also weigh little, due to large sizes They have high strength and a degree of tightness, and are simply and quickly assembled into any form of metal structures.

Additional applications for square and welded rectangular steel tubes:

1. The dimensions of the professional pipe 25 x 250 mm are used narrowly - in mechanical engineering in the manufacture of frames and frames;
2. Pipe profile section 60 x 30 mm is used for assembling advertising boards, frames and panel structures of varying complexity and configuration;
3. Pipe-rolling professional products of other sections (for example, 40 x 40 mm or another size range, etc.) are used for assembling almost any building structures, even such as chimneys or ventilation ducts, internal and external, as well as during the installation of capital or lightweight construction projects: warehouses, hangars, sheds.

The standard range of rectangular and square products is so in demand in construction that it is difficult to imagine the construction of even a small facility without them - these are ideal welded or seamless products in the construction of metal structures of any complexity, the area and height of which does not matter due to the high load capacity of this type of metal.

Reference table of sizes and description of other parameters of rectangular, oval and square tubular products:

Advantages and features of rectangular metal structures and elements for them:

1. The specific gravity of rectangular elements of different diameters is always less than this parameter of a solid rectangular rod with the same cross-section. With the largest geometric dimensions of rectangular pipes 230 x 100 mm, such elements weigh only 37-38 kg, while the mass of a solid beam with the same dimensions will be about 1000 kg. Therefore, even the greatest thickness of such profile elements does not detract from their advantages over solid-cast channels, I-beams or beams;
2. Cutting or welding pipes is much easier and faster compared to solid-cast elements. In addition, a rectangular steel pipe, the assortment of which is reflected in a small table, is easily deformed into a curved product using a conventional pipe bender, while to bend an all-metal product you will need a hydraulic forging press;
3. The cost of rectangular and square pipes without a seam is less.

Types of rectangular pipes

The range of sizes, taking into account the length and wall thickness of profile rectangular pipes, is so extensive that when choosing a product for certain operating conditions, it is recommended to take into account the manufacturing technology of the product, which determines the scope of use of the product.

The basis for the classification of profile elements is the assortment. Taking into account the pipe manufacturing technology, the range of these profile elements construction market is divided into the following categories:

1. Hot-deformed seamless products, which are produced using hot rolling technology;
2. Cold-formed seamless products, which are produced using cold rolling technology;
3. Welded elements that are produced using electric welding.

Other technologies for rolling and other methods of manufacturing metal profile pipes are not efficient enough and are not profitable enough.

GOST and assortment of pipes made of black steel and stainless steel

The standards used in modern industry regarding the production and assortment of profile and other metal products were approved back in the last century, but are still applied today, since their requirements have not lost their relevance: these are GOST 8639-82, GOST 13663-86, GOST 8645 -68 and GOST 13663-86. And, although the requirements for cold and hot rolled products provide sufficient strength and service life of products, elements of rolled products are less in demand than welded ones, due to the fact that by welding it is easier to change the direction of the line and the bending of individual sections of the structure. Therefore, when choosing the required range of profile products, it is recommended to first familiarize yourself with the geometric dimensions and manufacturing technology of certain profile parts.

The technologies for manufacturing any profile elements made of stainless steel are fundamentally no different from the methods for producing pipes made of black steel, which is more susceptible to metal corrosion, except for a separate point - cost. Due to the high cost of production, stainless steel profile parts are practically not in demand in the construction of large-sized and heavy objects with high load-bearing loads, and therefore the requirements for the strength of rectangular stainless steel pipes are lower compared to the same requirements for conventional steel.

Therefore, most often, rectangular stainless steel profiled products are made by welding using HF technology, which is based on the effect of induction currents on metals and is a relatively cheap technology.

There are no separate standards and regulations for the range of stainless rectangular or square pipes, therefore, in their manufacture, GOST for parts made of black (corrosion-resistant) steel and standards for raw materials are used:

1. For the production of stainless steel profile products by electric welding, GOST 11068-81 is used;
2. For the manufacture of elements of hot-formed seamless products, GOST 9940-81 is used;
3. For the manufacture of elements of cold-formed seamless products, GOST 9941-81 is used.

Available construction organizations there is a special table for assortment tubular products rectangular and square size made of steel, but since stainless steel has a higher density than black corrosion-resistant steel, its specific gravity for 1 linear meter will be slightly greater, and for each range of products, manufacturing companies have their own assortment of products of their own production.

When ordering and purchasing profile products manufactured not by a large company, but in a semi-handicraft way and by an unknown manufacturer, be responsible for the fact that such products are dangerous to use for the construction of any load-bearing structures of large size and weight. The danger is that such products are rarely processed in a heat chamber after rolling, and the products contain internal stresses that affect the strength of the product, especially under difficult operating conditions.

Where are rectangular pipe elements used?

A large range of sizes of profile elements with square and rectangular sections means they can be used in almost all industries National economy, including private construction.

In addition, the assortment allows the production of the following components, elements and structural parts:

1. Large-sized frames of load-bearing structures with large profile wall thicknesses, for example, 196 x 170 mm. Such products ideally provide strength and resistance to any type of load of objects: hangars, warehouses, shopping centers, hypermarkets, sports complexes, skeletons of high-rise buildings, etc.;
2. Decorative fences and security fences. Such structures are most often made of profile stainless steel and have small sizes and prefabricated structure. Stainless steel is better suited for decoration than black steel fences that rust over time;
3. Furniture and its components: metal chairs and tables for public places, student desks, furniture for medical institutions, public organizations and social institutions;
4. Frames for winter garden, small-sized greenhouses and conservatories. On lightweight steel profile frame You can quickly stretch the film or glaze.

Profile hardware— an indispensable component of any construction project and general-purpose metal structures. Such profiles are widely used in individual construction, maintaining the low load of thin-walled frames.