Pipes steel gost 3262 75 diameters. Pipes steel water and gas

Supports for pipelines in polyurethane foam insulation

Pipe supports are used to hold elements of trunk networks. They are laid during the installation of pipe lines. They are made of steel of various strength characteristics and corrosion resistance.

Pipeline support prices add up

Wells
Hatches made of cast iron
Stairs for wells
Accessories for wells
Base plates for manholes
rainwater inlets
Cast iron hulls and manhole covers
Gas carpets and accessories
Locking devices for hatches
Other goods
Ductile iron hatches and accessories
Cable cast iron consoles
Wells are structures that are designed to carry out purification, control, testing of external sewage and drainage systems. The main function of such special facilities is the collection and accumulation of wastewater, rainwater, etc. The bottom of such wells is equipped with various trays and grooves for directing drains. Due to these wells, unhindered migration of water into them is ensured. The role of sewer wells in the performance of repair and maintenance work, such as flushing and cleaning the entire system, is very large. Depending on the functions performed, the wells can be the following: storage, inspection, filtering, differential, rotary.

Insulation
rockwool
Paroc
hotpipe
K-flex
Energoflex
Izolin
Currently, there are a large number of pipes that are suitable for residential buildings, industrial, administrative, they supply heat, water, gas, and there are also main gas pipelines with oil products. All of them require reliable protection - thermal insulation, waterproofing, protection from harmful environmental influences, etc. What is it for? In order to extend the service life and quality of service of various pipelines, without which a full life is impossible today. This section presents insulation, which serves as a reliable protection for the pipeline and is made in modern production.

Cranes
Danfoss
Broen Ballomax
The valves serve as a device for regulating the flow of various working media in the pipeline system, at any time they can be opened or closed or the pressure of the supplied fluid can be adjusted, which is very convenient. This design is quite easy to operate and ensures a long service life, because. The chance of breakage is very small and minimal. Cranes are different in their design, in appearance. Used in various systems. Due to its simplicity of design, reliability in operation and durability, this locking device is very popular and is used in many industries - water supply, heating, gas supply, etc.

Pumps
Grundfos
A pump is a device that moves gases or liquids. In these modern conditions, life without pumping equipment is simply impossible to imagine, this is confirmed by the fact that 20% of the world's electricity is used to operate pumping equipment. Pumps are divided into domestic and industrial, depending on the scope of application. Household pumps are used in the heating, sewerage and water supply systems, while industrial pumps are used in cooling systems, industrial water supply, water treatment, supply and pumping of liquids that are supplied under high pressure.

Zilmet
reflex
This section presents expansion membrane tanks, which serve as a reservoir for pumps and accumulators. When you choose a tank for a heating system, you need to pay attention to the material of the membrane, which must be durable and not collapse when exposed to aggressive media and high temperatures. Particular attention should be paid to the working conditions and the main purpose of the expansion tank in the system. The products presented in this section are certified by the most successful companies that specialize in the production of these products.

Fitting
locknuts
Couplings
Elbows
Transitions
Threads
Drives
flanges
Stubs
Tees
Bochata
Welded parts of pipelines
Steel and cast iron pipe fittings have been used for threaded connections of highways and devices since the beginning of the use of a metal pipe to move the working medium, therefore, even in our time, it is all the more difficult to overestimate the importance of these connecting elements. Pipes and fittings have always been the basis of any pipeline, therefore, with the development of technical progress developed technologies and types of steel and cast iron fittings. The price of manufacturing a fitting depends on the materials used, their weight and purpose. A cast iron fitting is made by casting and installed for branching, turns, pipe transitions to a different diameter, especially in cases where periodic disassembly of connections is necessary. The steel fitting acts more as a welded threaded connector, as well as couplings and locknuts on the spurs, and is produced mainly from a pipe billet on lathes. Most of the hydraulic devices such as heaters, filters, distributors, automatic and control devices, etc. it is impossible to manufacture and connect to the pipeline without the use of a steel and cast iron fitting.

Cast iron pipes (Free Sokol)
Cast iron fittings
In the catalog of our products there are cast-iron styles and pipes VChShG - socket and floor which are made of ductile iron with nodular graphite nominal diameter 80, 100, 125, 150, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900, 1000 mm. Ductile iron pipes are made 6 meters long, under a sealing rubber ring, with an external and internal coating that complies with the standards of GOST R ISO 2531, EN 545. Socket pipes with such types of connections as: TYTON, TYTON sewage and RVS (RJ) are on sale. Tyton (Tyton) - a socket connection for a sealing ring with a working pressure of 3.0-6.4 MPa; RVS (RJ) - a socket-and-lock connection for a sealing rubber ring with a working pressure of 2.5-8.8 MPa; Ductile iron with nodular graphite - ductile iron has differences from lamellar graphite gray iron such as higher strength, which is close to the properties of mild steel, and higher resistance to cracking. To obtain such properties, ductile iron was obtained by modifying liquid iron with magnesium and various additives. As a result, a metal was obtained in which graphite is in the form of balls, which makes it possible to increase the plasticity and strength of pipes and styles.

Pipes of the VGP category are a group of water and gas pipes made of steel. Moreover, there are galvanized and non-galvanized options. Pipes are hollow, cylindrical in shape, having a longitudinal welded seam.

The category has three wall thickness options - thick-walled, medium-walled and thin-walled. An assortment of this nature makes it possible to use pipes suitable specifically for the project in which they are used.

Product parameters

The name speaks for itself - a pipe of this type can be used both in plumbing systems and in gas pipelines. In principle, the VGP pipe is considered a universal option for many applications.

Standard pipes have a length of segments from 4 m to 12 m. Moreover, there is a choice of material - without thread, or with cylindrical or knurled threads at the ends. Moreover, it can be short or long - it all depends on the nuances in use.

Typically, the VGP pipe has three strength categories:

Ordinary.
Lungs.
Reinforced.

Although such pipes are heavier than non-galvanized ones, by about 3%, the coating gives an excellent result when liquids pass through the line. The pipe does not rust, and its service life is extended significantly.

Advantages of VGP pipes

Standard pipes VGP GOST 3262 75 are made of high quality steel.

The so-called "black pipes" of the VGP have a reinforced welded seam.

Pipes of this type have three categories convenient for the consumer - light, reinforced and ordinary. This allows you to choose the right option for the perfect design of the highway.

The thread at the ends of the pipes can be long, short, or applied, depending on the wishes of the customer, to the desired side in the required parameters.

Pipes of this category are supplied either with or without couplings.

Pipe parameters can be indicated in inches, which is considered the norm.

The pipes being sold undergo mandatory hydro-vortex control, so compliance with the standards can be considered almost perfect.

Low cost with excellent product quality is the guarantor of the assigned standards and regulations.

Versatility in application. Pipes of the right type are ideal for installation and repair work of almost any category.

A huge range of pipe varieties - from hot-rolled seamless to cold-rolled and electric-welded options.

The presence of components - flanges, couplings, tees, bends, transitions and other things, as well as the possibility of their easy use in installation work.

As you understand, standard VGP pipes GOST 3262 75 have a wide range of applications. The presence of at least three types of this type makes it possible to use them in almost all areas of pipelines. Moreover, it is possible to select a category for the type of line, with a rich selection of pipe types for its installation.

Electric-welded longitudinal GOST 3262 are electric-welded pipes that are used to create heating and water supply systems, as well as gas pipelines. The requirements specified in the regulation apply to steel products, which may or may not have threads and galvanized coating. thin-walled and thick-walled have a wide range of applications due to good technical characteristics and low cost. With their help, it is allowed to implement almost any projects for supplying the building with engineering networks.

Varieties of VGP pipes

The presented type of rolled metal is produced with a length of 4 to 12 m. They can be divided into VGP pipes of measured and random lengths. Depending on the conditional passage, they can be wound into coils. In addition, metal products of this type are divided into the following types:

pipes of ordinary accuracy are produced without standardizing the composition of mechanical properties;
pipes of increased accuracy, during the creation of which the norms of GOST 1050-88 are observed.

Products are divided into thick-walled and thin-walled steel pipes depending on the wall thickness. Often, experts divide them into light, ordinary and reinforced on a similar basis. Buyers should carefully read the characteristics of the products, as this will affect the operation process in the future. Incorrect selection and installation can cause premature failure of the system and the need for immediate repair.

Advantages of VGP pipes

It is important to buy water and gas pipes for housing and communal services, owners of private houses and enterprises. They have the following benefits:

high quality workmanship and the absence of marriage;
the ability to select products with a suitable diameter, size and weight;
ease of installation is ensured by the use of welding;
materials are resistant to corrosion, chemical and mechanical stress;
high strength and no deformation;
long service life;
ease of transportation and storage;
affordable cost.

Anyone can acquire rolled metal products of the presented type wholesale or retail, choosing it in accordance with the purpose. The terms of delivery of goods are guaranteed to satisfy all buyers.

6. The limitation of the validity period was removed by the Decree of the State Standard of November 12, 1991 N 1726

7. EDITION (May 2007) with Amendments Nos. 1, 2, 3, 4, 5, 6 approved in November 1977, December 1978, January 1987, May 1988, November 1989 , November 1991 (IUS 1-78, 2-79, 4-87, 8-88, 2-90, 2-92)

This standard applies to non-galvanized and galvanized steel welded pipes with threaded or knurled cylindrical threads and without threads used for water and gas pipelines, heating systems, as well as for parts of water and gas pipeline structures.

(Changed edition, Rev. N 2, 3, 5).

1. ASSORTMENT

1.1. Pipes are made according to the dimensions and weight given in table.1.

At the request of the consumer, light series pipes intended for thread rolling are manufactured according to the dimensions and weight given in Table 2.

(Changed edition, Rev. N 1, 3).

1.2. The length of the pipe is made from 4 to 12 m:

measured or multiple measured length with an allowance for each cut of 5 mm and a longitudinal deviation for the entire length plus 10 mm;

unmeasured length.

By agreement between the manufacturer and the consumer, up to 5% of pipes with a length of 1.5 to 4 m are allowed in a batch of off-gauge pipes.

Table 1

Dimensions, mm


Conditional pass	Outside diameter	Pipe Wall Thickness			Weight of 1 m of pipes, kg
		lungs	ordinary	enhanced		ordinary	enhanced

table 2

Dimensions, mm


Conditional pass	Outside diameter	Wall thickness	Weight of 1 m of pipes, kg

Notes:

1. For a thread made by knurling, a reduction in its inner diameter of up to 10% along the entire length of the thread is allowed on the pipe.

2. The mass of 1 m of pipes is calculated with a steel density of 7.85 g/cm. Galvanized pipes are 3% heavier than non-galvanized ones.

1.3. Limit deviations in pipe dimensions should not exceed those indicated in Table 3.

Table 3


Pipe size	Limit deviation for precision pipes
	ordinary	elevated
Outer diameter with nominal bore:
up to 40 mm incl.	0.4mm -0,5
over 40 mm
Wall thickness

Notes:

1. The maximum deviation in the plus side along the wall thickness is limited by the maximum deviations in the mass of pipes.

2. Pipes of ordinary manufacturing accuracy are used for water pipes, gas pipelines and heating systems. Pipes of increased manufacturing accuracy are used for parts of water and gas pipeline structures.

1.4. Maximum deviations in the mass of pipes should not exceed + 8%.

At the request of the consumer, the maximum deviations in mass should not exceed:

+7.5% - for the party;

+10% - for a separate pipe.

(Changed edition, Rev. N 2, 5).

1.5. The curvature of pipes per 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with nominal bore over 20 mm.

1.6. Pipe threads can be long or short. Thread requirements must be as specified in Table 4.

Table 4


Conditional passage, mm	Number of threads with conditional passage	Thread length to the run, mm
		long	short

1.7. Pipes with a nominal bore of 6, 8, 10.15 and 20 mm are wound into coils at the request of the consumer.

Legend Examples

Ordinary pipe, non-galvanized, of the usual manufacturing accuracy, random length, with a nominal bore of 20 mm, a wall thickness of 2.8 mm, without thread and without a coupling:

Pipe 20x2.8 GOST 3262-75

The same with the clutch:

Pipe M-20x2.8 GOST 3262-75

The same, measured length, threaded:

Pipe P-20x2.8-4000 GOST 3262-75

The same, zinc coated, random length, threaded:

Pipe Ts-R-20x2.8 GOST 3262-75

The same, with zinc coating, measured length, with thread:

Pipe Ts-R-20x2.8-4000 GOST 3262-75

For pipes for thread rolling, the letter H is indicated after the word "pipe" in the symbol.

For pipes with a long thread, the letter D is indicated after the word "pipe" in the symbol.

For pipes of increased manufacturing accuracy, the letter P is indicated in the symbol after the nominal bore size.

(Changed edition, Rev. N 1).

2. TECHNICAL REQUIREMENTS

2.1. Pipes are manufactured in accordance with the requirements of this standard and according to the technological regulations approved in the prescribed manner, from steels according to GOST 380 and GOST 1050 without standardization of mechanical properties and chemical composition.

Pipes for parts of water and gas pipeline structures are made of steel according to GOST 1050.

2.2. At the request of the consumer, at the ends of pipes to be welded, with a wall thickness of 5 mm or more, chamfers must be removed at an angle of 35 ° -40 ° to the end of the pipe. In this case, an end ring with a width of 1-3 mm should be left.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1, 2.2. (Changed edition, Rev. N 3, 4).

2.3. At the request of the consumer, the pipes are equipped with couplings made according to GOST 8944 , GOST 8954 , GOST 8965 and GOST 8966, based on one coupling per pipe.

(Changed edition, Rev. N 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the surface of the pipes.

At the ends of the pipes, delamination is not allowed.

Separate dents, ripples, risks, traces of stripping and other defects due to the production method are allowed, if they do not take the wall thickness beyond the minimum dimensions, as well as a scale layer that does not interfere with inspection.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the weld site if there is a gentle thickening of the inner diameter of not more than 1.0 mm in this place.

(Changed edition, Rev. N 3, 4).

2.5. At the request of the consumer, on pipes with a nominal bore of 20 mm or more, on the inner surface of the pipe seam, the burr must be cut or flattened, while the height of the burr or its traces should not exceed 0.5 mm.

At the request of the consumer, on pipes with a nominal bore of more than 15 mm, made by the method of furnace welding and the method of hot reduction, a gentle thickening of a height of not more than 0.5 mm is allowed on the inner surface of the pipes in the weld zone.

(Changed edition, Rev. N 2, 3, 4, 5, 6).

2.6. Pipe ends must be cut square. The value of the bevel of the end is allowed no more than 2 °. Burr residues should not exceed 0.5 mm. When removing burrs, the formation of blunting (rounding) of the ends is allowed. It is allowed to cut pipes in the mill line.

By agreement between the manufacturer and the consumer, burrs up to 1 mm are allowed on pipes with a nominal bore of 6-25 mm, made by furnace welding.

(Changed edition, Rev. N 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hardzinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipes being caught by lifting devices, roughness and slight local zinc deposits are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe according to GOST 9.307.

(Changed edition, Rev. N 3, 4).

2.8. Pipes must withstand hydraulic pressure:

2.4 MPa (25 kgf / cm) - ordinary and light pipes;

3.1 MPa (32 kgf/cm) - reinforced pipes.

At the request of the consumer, the pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf/cm).

2.9. Pipes with a nominal bore up to 40 mm inclusive must withstand a bend test around a mandrel with a radius equal to 2.5 of the outer diameter, and with a nominal bore of 50 mm - on a mandrel with a radius equal to 3.5 of the outer diameter.

At the request of the consumer, the pipes must withstand the expansion test:

for pipes with nominal bore from 15 to 50 mm - not less than 7%;

for pipes with a nominal bore of 65 mm or more - at least 4%.

At the request of the consumer, the pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

2.8, 2.9. (Changed edition, Rev. N 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas pipeline structures must comply with GOST 1050.

2.11. Pipe threads must be clean, free of flaws and burrs, and conform to GOST 6357, accuracy class B.

Pipes with cylindrical threads are used when assembling with seals.

2.10, 2.11. (Changed edition, Rev. N 3, 4).

2.12. In the place of the seam, blackness on the threads of the thread is allowed if the decrease in the normal height of the thread profile does not exceed 15%, and at the request of the consumer does not exceed 10%.

Threads with stripped (for cut) or incomplete (for knurled) threads are allowed on threads, provided that their total length does not exceed 10% of the required thread length, and at the request of the consumer does not exceed 5%.

2.13. It is allowed on the thread to reduce the useful length of the thread (without run-off) up to 15% compared to that indicated in Table 4, and at the request of the consumer - up to 10%.

2.12, 2.13. (Changed edition, Rev. N 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.15. (Deleted, Rev. N 3).

2.16. At the request of the consumer, welded seams of pipes are subjected to control by non-destructive methods.

(Changed edition, Rev. N 5).

3. ACCEPTANCE RULES

3.1. Pipes are accepted in batches. The batch must consist of pipes of the same size, the same steel grade and be accompanied by one quality document in accordance with GOST 10692 with an addition for pipes intended for the manufacture of parts for water and gas pipeline structures, made of steel according to GOST 1050; chemical composition and mechanical properties of steel - in accordance with the document on the quality of the enterprise - the manufacturer of the workpiece.

Party weight - no more than 60 tons.

(Changed edition, Rev. N 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe of the batch.

It is allowed to apply statistical methods of control according to GOST 18242* with normal level. Control plans are established by agreement between the manufacturer and the consumer.
________________
* On the territory of the Russian Federation is valid GOST R 50779.71-99.

The control of the outer diameter of the pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Changed edition, Rev. N 3, 4, 5).

3.3. To control the parameters of the thread, to test for expansion, flattening, bending, the height of the internal burr, burr residues, right angle and chamfer angle (for pipes with bevelled edges), mechanical properties are selected no more than 1%, but not less than two pipes from the batch, and for pipes manufactured by continuous furnace welding, two pipes per batch.

(Changed edition, Rev. N 3, 4).

3.4. All pipes are subjected to weight control.

(Changed edition, Rev. N 3).

3.5. Each pipe is subjected to a hydraulic pressure test. With 100% quality control of the weld by non-destructive methods, hydraulic pressure testing may not be carried out. At the same time, the ability of the pipes to withstand the test hydraulic pressure is guaranteed.

(Changed edition, Rev. N 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the lot.

(Changed edition, Rev. N 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators, it is repeated tests on a double sample.

The retest results apply to the entire lot.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

The tensile test is carried out according to GOST 10006. Instead of tensile testing, it is allowed to control mechanical properties by non-destructive methods.

(Changed edition, Rev. N 3, 6).

4.2. Inspection of the surface of the pipes is carried out visually.

4.3. The hydraulic test is carried out according to GOST 3845 with exposure under test pressure for at least 5 s.

4.4. The bend test is carried out according to GOST 3728. Galvanized pipes are tested before coating.

(Changed edition, Rev. N 3).

4.4a. The distribution test is carried out according to GOST 8694 on a conical mandrel with a taper angle of 6°.

The test can be carried out on a mandrel with a taper angle of 30°.

(Changed edition, Rev. N 3, 4).

4.4b. The flattening test is carried out according to GOST 8695.

(Changed edition, Rev. N 3).

4.4c. Weld seam control is carried out by non-destructive methods according to normative documentation.

(Introduced additionally, Rev. N 3).

4.5. The thickness of the zinc coating on the outer surface and in accessible places on the inner surface is controlled by GOST 9.301 and GOST 9.302, as well as devices of types MT-41NTs, MTZON or type "Impulse" according to regulatory documentation.

4.6. The thread is checked with threaded ring gauges according to GOST 5378 from both ends of the pipe.

Pipe lengths are measured with a tape measure. GOST 7502. The thread is controlled by calibers according to GOST 2533.

The control of the mass of a batch of pipes is carried out on scales of not more than 10 tons with a division value of not more than 20 kg.

(Changed edition, Rev. N 3, 4, 5, 6).

4.10. Weld seam control is carried out by non-destructive methods according to technical documentation.

(Introduced additionally, Rev. N 4).

5. MARKING, PACKAGING, TRANSPORT AND STORAGE

5.1. Marking, packaging, transportation and storage are carried out according to GOST 10692 with addition.

5.1.1. Pipe threads must be protected from mechanical damage and corrosion with grease in accordance with regulatory documents.

Section 5. (Changed edition, Rev. N 3).

Electronic text of the document
prepared by Kodeks JSC and verified against:
official publication
M.: Standartinform, 2007