Pipes are steel square. Profile pipe: GOST and scope of application GOST 8639 68 steel rectangular pipes assortment

GOST 30245-2003 regulates the basic requirements for the manufacture of closed welded profiles for building structures. Assortment of steel square pipes includes main dimensions:

For a square profile: from 40x40x2 to 300x300x14 mm.
For a rectangular profile: from 50x25x2 to 400x200x14 mm.

During the pipe development stage, round profiles with longitudinal seams are used, which are pressed with rolls to obtain a square or rectangular profile. Works are carried out on special mills. Steel is taken as the basis:

Sheet metal roll.
Carbon steel universal application.
Low-alloy thick-walled steel (from 3 mm or more), according to TU 14105509.

The removal of burrs from longitudinal seams is carried out with outer side design, the following deviations are allowed:

0.5 mm - with a section of profile walls up to 0.4 cm.
1 mm - with a metal cross section of 0.4 cm.

Quality finished products regulated by the main provisions of the assortment:

3 Assortment

3.1 The main parameters of the profile section are shown in fig. one.

3.2 Other indicators (S sec., axis and weight parameters for 1 m of the profile element) are determined by the corresponding indicators: for pipes with equilateral walls - table. one; for products rectangular shape- tab. 2.

3.3 Permissible errors in the thickness of the material correspond to the maximum deviations of the initial blanks with a width of 125 cm of the standard accuracy of rolled products "B" in accordance with GOST 199-03. Deviations are allowed in the bend areas.

3.4 The discrepancy between the height and width of products is calculated in%:

With dimensions (in height and width) up to 10 cm - ± 1, but not less than ± 0.5 mm;
Over 10 cm - ± 0.8.

3.5 Deviations of the radii of the outer circle are allowed:

If t
If 0.6
If t > 1 cm - from 2.401 t to 3.601 t.

3.6 Maximum size tolerance to the 90° angle is ±1°30" (in the transverse part of the structure).

3.7 The length of profile pipes is 600 - 1200 cm, and at the request of the customer 400 - 1300 cm:

Unmeasured quantities.
Dimensional parameters.
Multiple measured sizes.

3.8 Maximum tolerances to the length of measured and multiple measured values \u200b\u200bis equal to +6 cm.

3.9 Below are the conventional values of bent electrowelded profile structures with vertical parameters = 18, horizontal section = 10, wall thickness = 0.5 cm. In this example, steel grade C245 according to GOST 277-72 is used:

Tab. one

Tab.

GOST 8639-82

Group B62

INTERSTATE STANDARD

STEEL PIPES SQUARE

Assortment

Square steel tubes. Range

OKP 13 1900
13 4400
13 5100
13 7300

Introduction date 1983-01-01

INFORMATION DATA

1. DESIGNED AND INTRODUCED by the Ministry ferrous metallurgy of the USSR

DEVELOPERS

V.P. Sokurenko, Candidate, Tech. sciences (topic leader); A.B. Petrushevskaya

2. APPROVED AND INTRODUCED BY Resolution State Committee USSR according to the standards of 14.04.82 N 1529

3. REPLACE GOST 8639-68

4. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

5. The limitation of the validity period was removed by the Decree of the State Standard of 09/07/92 N 1125

6. EDITION with Amendments No. 1, 2, 3, approved in June 1987, November 1989, September 1992 (IUS 10-87, 2-90, 12-92)

1. This standard applies to steel seamless hot-worked and cold-worked, electric-welded and electric-welded cold-worked pipes.

(Changed edition, Rev. N 3).

2. The shape and dimensions of square pipes must correspond to those indicated in the drawing and in Table 1.

Table 1

Moment of inertia, cm

Moment of resistance, cm

Outer size, mm

Wall thickness, mm

Sectional area, cm

Weight 1 m, kg

Pipes of special sizes

76,91
2, 3. (Changed edition, Rev. N 1).

4. The radius of curvature should be no more than 2.

By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5, for electric-welded pipes size 60x60x4 mm - no more than 3.

5. Pipes are made:

Random length

Seamless cold-formed and electric-welded - from 1.5 to 9 m;

Measured length

Seamless hot-deformed - from 4 to 12.5 m;

Seamless cold-formed - from 4.5 to 11 m;

Electrowelded - from 5 to 9 m.

Maximum deviation for the total length +100 mm;

Dimensional length

Seamless hot-deformed - from 4 to 12.5 m with an allowance for each cut of 5 mm;

Seamless cold-formed - from 1.5 to 11 m with an allowance for each cut of 5 mm;

Electric welded - any multiplicity not exceeding the lower limit established for measured pipes.

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

6. Limit deviations in external dimensions, wall thickness and concavity of the sides should not exceed those indicated in Table 2.

table 2

Name of parameters	Limit deviations of pipe dimensions with manufacturing precision
	normal	high
External dimensions
for seamless hot-formed pipes
for seamless cold-formed and electric-welded pipes up to 30 mm in size
for seamless cold-formed and electric-welded pipes with dimensions over 30 to 50 mm
for seamless cold-formed and electric-welded pipes larger than 50 mm
Wall thickness:
for hot-formed pipes	12,5% -15,0%	12,5% -15,0%
for cold-formed pipes (seamless and electric-welded):
with a wall thickness of 3.5 mm
for wall thickness > 3.5 mm
for electric pipes
Concave or convex sides:
for seamless hot-formed pipes with sides of size:
up to 50 mm
St. 50" 70mm
"70" 100 mm

for seamless cold-formed and electric-welded pipes with side dimensions:
up to 50 mm
St. 50" 70mm

Twisting square and rectangular pipes:
for electric-welded and seamless hot-formed pipes, not more than
for cold-formed pipes		By agreement between the manufacturer and the consumer

Note. By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in Table 2.

(Changed edition, Rev. N 1).

7. The difference in wall thickness should not lead the wall beyond limit deviations along the wall thickness.

8. In the cross section of the pipe, the deviation from right angle should not exceed ±1.5°.

9. The curvature of the pipes should not exceed 2 mm per 1 m of length.

At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.

10. (Excluded. Rev. N 1).

11. Technical requirements must comply with GOST 13663.

The text of the document is verified by:
official publication
Pipes metal and connecting parts to them.
Part 3. Welded pipes. Profile pipes:
Sat. GOSTs. - M.: IPK Standards Publishing House, 2001

This standard applies to seamless hot-rolled, cold-drawn and electric-welded square steel pipes.

Pipe dimensions are shown in the table.

3,0; 3,5; 4,0; 5,0; 6,0; 7,0; 8,0

8,0; 9,0; 10; 10,0; 12,0; 14,0

Note: The radius of curvature R must not exceed 2 s .

off-gauge:
seamless cold-drawn and electric-welded from 1.5 to 9 m;
dimensional
seamless hot-rolled from 4 to 12.5 m;
seamless cold-drawn from 4.5 to 11 m;
electric welded from 4.5 to 11 m;
within off-gauge with a deviation of + 100 mm;
multiple dimensional - within the non-dimensional with an allowance for each cut of 5 mm, unless otherwise specified in the order.

Permissible deviations from the nominal dimensions:

outside diameter:
for hot-rolled pipes +1.5%;
for seamless cold-drawn and welded pipes with a diameter:
up to 30 mm + 0.3 mm;
over 30 to 50 mm + 0.4 mm;
over 50 mm +0.8%;
wall thickness:
for seamless hot-rolled pipes of ordinary accuracy (+12.5) - (-15)%;
for electrowelded non-drawn pipes +10%;
for cold-drawn (seamless and electric-welded) +12.5%.

GOST 8639-82: Steel square pipes

GOST 8639-82 - Steel square pipes. Range This standard applies to seamless hot-rolled, cold-drawn and electric-welded square steel tubes. Pipe dimensions

GOST 8639 82 steel square pipes

GOST 8639-82 - Steel square pipes. Assortment

Amendment No. 2 to GOST 8639-82 (1990-04-01) - "Validity period extended"

Amendment No. 3 to GOST 8639-82 (1993-02-01) - "Validity period extended"

OKS All-Russian classifier of standards

23 HYDRAULIC AND PNEUMATIC SYSTEMS AND COMPONENTS FOR GENERAL PURPOSE (Fluid flow measurement see: 17.120)

23.040 Pipelines and components thereof (Pipes and components for petroleum products and natural gas see: 75.200)

23.040.10 Cast iron and steel pipes (Steel pipes and tubes special purpose see: 77.140.75)

B Metals and metal products

B6 Metal pipes and pipe products

B62 Steel pipes and fittings for them

130000 STEEL PIPES

131000 Steel pipes, hot-formed, smooth (except for threaded ones)

131900 Rolled pipes (general purpose)

134000 Seamless carbon and alloy drawn pipes

134400 General purpose drawn pipes

135000 Thin-walled seamless pipes (without stainless steel)

135100 Seamless carbon thin-walled pipes (except for lineless and variable section)

137000 Welded steel pipes up to 114 mm in diameter (including rolled pipes)

137300 Thin-walled electric-welded carbon pipes (diameter up to 114 mm)

GOST 8639-82: Steel square pipes

GOSTs, SNiPs, SanPiNs - Regulations GOST 8639-82, Steel square pipes. Assortment,

GOST 8639-82

M E F G O S U D A R S T V E N N Y S T A N D A R T

GOST 8639-82

Introduction date 01.01.1983

1. This standard applies to seamless hot-formed and cold-formed steel, electric-welded and cold-formed electric-welded pipes.

(Revised edition, Rev. No. 1).

2. The shape and dimensions of square pipes must correspond to those indicated in the drawing and in Table 1.

Table 1 - continuation

1. Mass calculated at a steel density of 7.85 g/cm 3 .

2. The static characteristics of the pipes are calculated for R= 1.5s.

Legend Examples

Pipes with an outer dimension of 40 mm, a wall thickness of 3 mm, a length that is a multiple of 1250 mm, made of steel grade 10, group B GOST 13663-86:

The same, measured length 6000 mm:

The same, random length:

3. Pipes with outer dimensions from 10 to 120 mm with wall thickness from 1.0 to 8.0 mm are made cold-formed, pipes with outer dimensions from 60 to 180 mm with wall thickness from 4.0 to 14.0 mm are made hot-worked, pipes with outer dimensions from 10 to 100 mm wall thickness from 1.0 to 5.0 mm are made by electric welding.

2, 3. (Changed edition, Rev. No. 1).

4. Cornering radius R should be no more than 2s.

By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5 s, for electric-welded pipes with a size of 60 60 4 mm - no more than 3 s.

5. Pipes are made:

seamless hot-formed - from 4 to 12.5 m,

seamless cold-formed and electric-welded - from 1.5 to 9 m;

seamless hot-formed - from 4 to 12.5 m;

seamless cold-formed - from 4.5 to 11 m;

electrowelded - from 5 to 9 m.

Maximum deviation for the total length +100 mm; length multiple and measured

seamless hot-formed - from 4 to 12.5 m with an allowance for each cut of 5 mm;

seamless cold-formed - from 1.5 to 11 m with an allowance for each cut of 5 mm;

electric-welded - any multiplicity, not exceeding the lower limit established for measured pipes.

The total length of the multiple pipes must not exceed the upper limit of the measured pipes. The allowance for each multiplicity is set at 5 mm (unless another allowance is specified in the order) and is included in each ordered multiplicity. (Changed edition, Rev. No. 1, No. 3).6. Limit deviations in external dimensions, wall thickness and concavity of the sides should not exceed those indicated in Table. 2.

By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in Table. 2. (Changed edition, Rev. No. 1).

7. The difference in wall thickness should not lead the wall beyond the limit deviations in wall thickness.

8. In the cross section of the pipe, the deviation from the right angle should not exceed ± 1.5 °.

9. The curvature of the pipes should not exceed 2 mm per 1 m of length. At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.

10. (Excluded. Amendment No. 1).

11. Technical requirements must comply with GOST 13663.

GOST 8639-82 Standard for pipes (including for poles) square section- Call for price

GOST 8639-82 You can download the standard from the link, buy by phone

Steel pipes quickly began to be used in construction as a frame element. Compared to cast metal rod, they favorably differed in lighter weight and lower cost with almost the same strength characteristics. However, there was also a disadvantage round form sections. This made it difficult to transport and store rolled metal, and most importantly, fastening.

The profile square pipe solved this problem.

Profile metal rolling: features

The main difference between a square or rectangular pipe is the presence of stiffeners. At round section the walls of the product equally resist internal and external pressure. But load-bearing element experiences just an uneven load - external and, as a rule, perpendicular to the longitudinal axis.

The stiffening ribs take it upon themselves, providing more high strength. The use of the product is based on this quality.

The profile products of rolled metal products include:

square pipes - described by GOST 8639-82;
products of rectangular section - are used as a structural building material;
oval section - compared to a round conduit, it has a larger surface with the same volume, which allows you to effectively cool the transferred liquids and gas mixtures.

Production

The entire range of rolled products is produced in accordance with GOST 8639-82. This standard applies to cold worked, hot worked seamless and welded products.

Production of electric pipeline.

Steel sheet - the strip is cut into strips. The strips are welded together to form a ribbon.
On the forming rollers, a billet with an open seam is obtained.
The seam is welded. Electrode, induction, laser welding and the like are used.
The round billet is transferred to the sizing rolls, where it is formed into a square tube.
The seam must be controlled. Possible deviations are described by GOST 8639-82.
The finished product is cut to length.

Production of seamless pipeline.

A solid metal bar is heated to a plastic state.
On the piercing press, the bar is pressed in - a hollow sleeve is formed.
The workpiece is rolled: stretched in order to obtain desired diameter and walls of a certain thickness. With a hot-formed sleeve, these operations are performed in a heated state, with a cold-formed sleeve, in a cooled state. The latter after molding is calcined to relieve internal stress.
The round billet is transferred to the sizing rollers, where it is given a square shape.

If we are talking about high-precision steel products, then the product is galvanized. Zinc forms a protective layer on the inside and outer surface and successfully resists corrosion. In the photo - galvanized steel pipeline.

Square steel pipe: pros and cons

Advantages:

high mechanical strength- seamless products have higher strength than welded ones;
increased resistance to external loads;
durability;
lower material consumption compared to a solid bar, which significantly reduces the cost of use;
the ability to bend without heat treatment, which allows you to keep all the qualities of the material unchanged;
very convenient for transportation and storage, as it is easily stored;
less weight compared to all-metal products;
large assortment according to GOST 8639-82;
installation is possible not only by welding, but also with the help of bolts;
does not make it difficult to fix the elements.

The disadvantages include corrosion instability. Stability of galvanized products or with polymer coated higher.

Product range

The range of steel square pipes is regulated by GOST 8639-82. These are section parameters, wall thickness, length, weight (theoretical calculations) and possible deviations.

Section dimensions - from 10 * 10 180 * 180 mm. GOST 8639-82 describes standardized products. However, production with non-standard sizes is not prohibited if the technology and product parameters are agreed with the customer.
Wall thickness - from 1 to 14 mm.
Length - unmeasured for seamless hot-formed is 4–12.5 m. for cold-formed and welded - 1.5–9 m. Measured length for seamless cold-formed - 4.5-11 m. hot-formed - 4-12.5 m, welded - 5-9 m.

1. This standard applies to seamless hot-formed and cold-formed steel, electric-welded and cold-formed electric-welded pipes.

2. The shape and dimensions of square pipes must correspond to those indicated on and in.

*Outer size BUT, mm*	Wall thicknesss, mm	Sectional area, cm2	Weight 1 m, kg	Moment of inertia, cm4»	Moment of resistance, cm3»
*Outer size BUT, mm*	Wall thicknesss, mm	Sectional area, cm2	Weight 1 m, kg





























































































Pipes of special sizes

Notes:

1. Mass calculated at a steel density of 7.85 g/cm3.

2. The static characteristics of the pipes are calculated for R= 1.5s.

Legend Examples

Pipes with an outer dimension of 40 mm, a wall thickness of 3 mm, a length that is a multiple of 1250 mm, made of steel grade 10, group B GOST 13663-86:

The same, measured length 6000 mm:

The same, random length:

2, 3.(Revised edition, Rev. No. 1).

4. Cornering radius R should be no more than 2s.

By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5s, for electric-welded pipes with a size of 60´60´4 mm - no more than 3s.

5. Pipes are made:

random length

seamless hot-formed - from 4 to 12.5 m,

seamless cold-formed and electric-welded - from 1.5 to 9 m;

measured length

seamless hot-formed - from 4 to 12.5 m;

seamless cold-formed - from 4.5 to 11 m;

electrowelded - from 5 to 9 m.

Maximum deviation for the total length +100 mm;

length multiple and dimensional

seamless hot-formed - from 4 to 12.5 m with an allowance for each cut of 5 mm;

seamless cold-formed - from 1.5 to 11 m with an allowance of 5 mm for each cut;

electric-welded - any multiplicity not exceeding the lower limit established for measured pipes.

(Changed edition, Rev. No. 1, No. 3).

6. Limit deviations in external dimensions, wall thickness and concavity of the sides should not exceed those specified in.

Name of parameters	Limit deviations of pipe dimensions with manufacturing precision
Name of parameters	normal	high
External dimensions:
for seamless hot-formed pipes
for seamless cold-formed and electric-welded pipes up to 30 mm in size
for seamless cold-formed and electric-welded pipes with dimensions over 30 to 50 mm
for seamless cold-formed and electric-welded pipes larger than 50 mm
Wall thickness:
for hot-formed pipes
for cold-formed pipes (seamless and electric-welded):
with wall thickness £ 3.5 mm
for wall thickness > 3.5 mm
for electric pipes
Concave or convex sides:
for seamless hot-formed pipes with sides of size:

St. 50" 70mm
» 70 » 100 mm

for seamless cold-formed and electric-welded pipes with side dimensions:

St. 50 » 70 mm

Twisting square and rectangular pipes:
for electric-welded and seamless hot-formed pipes, not more than		By agreement between the manufacturer and the consumer
for cold-formed pipes		By agreement between the manufacturer and the consumer

Note. By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in.

(Revised edition, Rev. No. 1).

7. The difference in wall thickness should not lead the wall beyond the limit deviations in wall thickness.

8. In the cross section of the pipe, the deviation from the right angle should not exceed ± 1.5 °.

9. The curvature of the pipes should not exceed 2 mm per 1 m of length. At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.

10.(Excluded. Change No. 1).

11. Technical requirements must comply with GOST 13663.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR

DEVELOPERS

V. P. Sokurenko, cand. tech. sciences (topic leader); BUT. B. Petrushevskaya

2. APPROVED AND INTRODUCED Decree of the USSR State Committee for Standards dated April 14, 1982 No. 1529

INSTEAD OF GOST 8639-68

4 REFERENCED REGULATORY DOCUMENTS

5. The limitation of the period of validity was removed by the Decree of the State Standard of 07.09.92 No. 1125

6. REPUBLICATION with changes No. 1, 2, 3, approved in June 1987, November 1989, September 1992 (IUS 10-87, 2-90, 12-92)

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