GOST 10705-80

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  ГОСТ 10705-80

GOST 10705−80 electrically welded steel Tubes. Technical specifications (with Changes 1−8 N)

GOST 10705−80

Group В62

INTERSTATE STANDARD

STEEL ELECTRIC-WELDED PIPES

Specifications

Electrically welded steel tubes. Specifications

ISS 23.040.10
OKP 13 7300
13 8100
13 8300

Date of introduction 1982−01−01

INFORMATION DATA

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

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 25.12.80 N 5970

Change No. 5 adopted by the Interstate Council for standardization, Metrology and certification (minutes N 13 dated 28.05.98)

Was the Technical Secretariat of MGS N 3166

The adoption of the changes voted:

3. REPLACE GOST 10705−63

4. REFERENCED DOCUMENTS

(Changed edition, Rev. N 6, 7).

5. The expiration time limit is removed by the Resolution of Gosstandart from 12.07.91 N 1247

6. EDITION (November 2005) with Changes in N 1, 2, 3, 4, 5, approved in December 1986, December 1987, June 1989, July 1991, April 1999 (IUS 2−87, 3−88, 10−89, 10−91, 7−99); Amendment (ICS 5−2005)

Reissue (as of March 2008).

LISTED by: Change No. 6, enacted on the territory of the Russian Federation from 01.09.2010 by the Order of Rosstandart on 17.06.2010 N 95th St; Change No. 7 adopted by the Interstate Council for standardization, Metrology and certification by correspondence (minutes from 12.05.2011 N 39). The state party of Ukraine. By the order of Rosstandart on 22.12.2011 No. 1577-St introduced on the territory of the Russian Federation from 01.10.2012; Modification No. 8, approved and promulgated by the Order of Rosstandart on 18.02.2015 N 97th St c 01.09.2015

Change No. 6, 7, 8 are made by the manufacturer of the database in the text IUS N 9, 2010 IUS N 3, 2012, IMS N 6, 2015

This standard applies to electrically welded steel pipes with a diameter from 10 mm to 630 mm made of carbon and low-alloy steels used for pipelines, structures and products for various purposes.

The standard does not apply to steel pipe used for making teploelektroenergetiki.

(Changed edition, Rev. N, 5, 7).

1. ASSORTMENT

1.1. The dimensions and the maximum deviations of tubes should correspond to GOST 10704.

2. TECHNICAL REQUIREMENTS

2.1. Welded steel pipe is manufactured in accordance with the requirements of this standard and technical regulations approved in the prescribed manner.

2.2. Depending on quality pipes are made of the following groups:

And — with standard mechanical properties from killed, semikilled and rimmed steel grades St1, ST2, St3, FT4 according to GOST 380;

B — with standard chemical composition:

from killed, semikilled and rimmed steel grades St1, ST2, St3, FT4 according to GOST 380;

from killed, semikilled and rimmed steel grades 08, 10, 15, 20 according to GOST 1050;

from 08JU steel grade according to GOST 9045;

from alloyed steel grade 22GJU with the chemical composition according to table 1A (pipes with diameter from 114 mm to 630 mm cyl.);

from alloyed steel grades according to GOST 19281 and other regulatory documents, with a normalized carbon equivalent of no more than 0.46 percent (pipes with diameter from 114 mm to 630 mm cyl.);

In — with standard mechanical properties and chemical composition:

from killed, semikilled and rimmed steel grades St1, ST2, St3, FT4 according to GOST 380;

from killed, semikilled and rimmed steel grades 08, 10, 15, 20 according to GOST 1050;

from 08JU steel grade according to GOST 9045;

from alloyed steel grade 22GJU with the chemical composition according to table 1A (pipes with diameter from 114 mm to 630 mm cyl.);

from alloyed steel grades according to GOST 19281 and other regulatory documents, with a normalized carbon equivalent of no more than 0.46 percent (pipes with diameter from 114 mm to 630 mm cyl.);

D — standard hydraulic test pressure.

Tubes made from rolled according to GOST 14637 (categories 1−5), GOST 16523 (category 4), GOST 9045, GOST 19281 and other normative documents approved in the prescribed manner.

Table 1A

(Changed edition, Rev. N 5, 6, 7).

2.3. Pipe carbon steel manufactured heat treated (over the entire volume of the pipe or weld), gorjachedeformirovannye or without heat treatment. The pipe of steel grade St1 is manufactured without heat treatment.

Pipes from alloyed grades of steel produce thermally processed (throughout the volume of the tube or weld) or without heat treatment.

The type of heat treatment chosen by the manufacturer. By agreement between manufacturer and customer pipe thermally treated in a protective atmosphere.

(Changed edition, Rev. N 5, 6, 8).

2.4. The mechanical properties of the base metal and heat treated gorjachedeformirovannye tubes of groups A and b carbon and low alloy steels shall conform to the standards specified in table.1. The mechanical properties of the base metal heat-treated tubes of groups A and b of steel grade 22GJU determined by agreement between manufacturer and customer.

Table 1

Note. At the customer’s request pipes with a wall thickness of 4 mm or more from steel grades St3ps, 15, 15ps manufactured with a yield strength of 235 H/mm(24 kgf/ mm), relative elongation of 23%; from steel grades St4sp, 20, 20ps, with yield strength of 255 H/mm(26 kgf/ mm), elongation 22%.


(Changed edition, Rev. N 5, 6, 8).

2.5. The mechanical properties of the base metal of the pipe groups A and b without heat treatment and with heat treatment of the welded joint with a diameter of from 10 to 152 mm inclusive must conform to the standards specified in table.2, with a diameter in excess of 152 mm to 630 mm inclusive — the standards specified in table.3.

Table 2

Note. According to customer demand for pipes in all grades of steel with a diameter of 10 to 60 mm the elongation is increased by 3% in comparison with the norms given in table.2.

Table 3

(Changed edition, Rev. N 5, 6, 7, 8).

2.6. On the surface of the pipe are not allowed cracks, slivers, sunsets, flaws and risks.

Rabina, nicks, dings, small risks, the layer of slag and traces of Stripping allowed, provided they do not derive wall thickness and pipe diameter for maximum deviations. Allowed offset edges to 10% of the nominal wall thickness.

Surface of the pipe, annealed in a protective atmosphere, should not have scale. Allowed the presence of the oxide film.

Fusion joints must be welded, the welding place is cleared. By agreement with the customer on pipes with a diameter 159 mm and more at repair joints allowed welding displacement of welded edges is not more than 20% of the nominal wall thickness and height of the reinforcement bead is not more than 2.5 mm.

Repair welding of the base metal pipes are not allowed.

In the case of repair welding of pipes, subjected to heat treatment, they are subjected again to heat treatment (respectively around the volume or weld).

2.7. On pipes with diameter 57 mm and more allows for a single transverse seam.

By agreement between manufacturer and customer a single transverse seam is permitted on pipes with a diameter of less than 57 mm.

2.6, 2.7. (Changed edition, Rev. N, 5, 8).

2.8. The outer burrs on the tubing shall be removed. In place of removing the Burr allowed the wall thinning in excess of minus 0.1 mm tolerance.

At the request of the customer on pipes an internal diameter of 33 mm and more inner Burr needs to be removed or partially tapered, and the height of burrs or traces thereof should not exceed 0.35 mm — wall thickness less than 2 mm; 0,4 mm — wall thickness 2 to 3 mm; 0.5 mm — for wall thickness over 3 mm.

The height of the inner bead or trace of him for pipes of internal diameter less than 33 mm is determined by agreement between manufacturer and customer.

(Changed edition, Rev. N 1, 3, 8).

2.9. The pipe ends should be square-cut and cleaned of burrs. Allowed the formation of the chamfer. Cut end Squareness, mm for pipe diameters up to 219 mm shall not exceed 1.0 mm, with diameter from 219 to 426 mm inclusive — 1.5 mm, with a diameter greater than 426 mm — 2.0 mm. By agreement between manufacturer and customer pipe made the cut in the line of the mill.

(Changed edition, Rev. N 3, 8).

2.10. At the request of the customer on the ends of pipes with a wall thickness of 5 mm or more should be removed chamfer at an angle of 25−30° to the pipe end and the left end ring width (1,8±0,8) mm. By agreement between manufacturer and customer the angle of the bevel and the face width of the ring can be changed.

(Changed edition, Rev. N 8).

2.11. Tubes shall withstand hydraulic test pressure. Depending on the values of the test pressure of the pipe are divided into two types:

I — pipe diameter up to 102 mm — test pressure 6.0 MPa (60 kgf/cm) and the pipe diameter of 102 mm — test pressure 3,0 MPa (30 kgf/cm);

II — pipes A and b, supplied at customer request with a test by hydraulic pressure, designed according to GOST 3845, with allowable stress equal to 90% of the normative yield strength for pipes made of this steel grade, but not exceeding 20 MPa (200 kgf/cm).

(Changed edition, Rev. N, 5, 8).

2.12. Tube, thermally treated throughout the volume, groups A and b, with wall thickness not less than 6 mm of steel grades st3sp, St3ps (categories 3−5), 10, 15, 20 and low alloy steels, to withstand testing the impact strength of the base metal. The provisions of the toughness shall be as specified in table.4. Test the impact strength of the base metal heat-treated tubes of groups A and b of steel grade 22GJU carried out at the request of the client, norms of toughness is determined by agreement between manufacturer and customer.

Table 4

Standards the impact strength of pipes of steel grade 22GJU established by agreement of the parties.

(Changed edition, Rev. N 6, 8).

2.13. Heat-treated pipes up to 152 mm inclusive, the pipe gorjachedeformirovannye and without heat treatment with a diameter of more than 20 to 152 mm inclusive, and a wall thickness of 0.06 or less, and pipe with heat treatment of the welded joint must withstand the test of flattening.

Flattening the heat-treated pipe shall be carried out before the distance between splosives planes , mm, computed by the formula

,

where  — coefficient for pipes of steel grades 08JU, 08KP, 08ps, 08, 10kp, St2kp equal to 0.09, and for tubes of other steel grades equal to 0.08;

 — nominal wall thickness, mm;

 — nominal outside diameter of pipe, mm.

Collapsed pipes with no heat treatment should be carried out to a distance equal to 2/3. Collapsed pipes with heat treatment, welded joints, and gorjachedeformirovannye pipes should be carried out to a distance equal to ½.

According to customer’s demand flattening heat treated tubes with a diameter of 152 to 530 mm should be carried out to a distance equal to 2/3.

(Changed edition, Rev. N, 5, 8).

2.14. Pipes up to 108 mm made of carbon steel grades specified in table 5 must be able to withstand the test of the distribution.

Tube without heat treatment up to a diameter of 20 mm and a diameter of 20−60 mm with a wall thickness of more than 0.06in the hand do not.

The increase in the outer diameter of heat treated tubes in the distribution must conform to the standards specified in table.5.

Table 5

The increase of the outer diameter of tubes without heat treatment in the distribution shall be not less than 6%.

According to customer demand increase in the outer diameter in the distribution of heat-treated pipes with wall thickness up to 4 mm of steel grades 10kp, St2kp must be at least 12%.

(Changed edition, Rev. N 1, 3, 4, 7, 8).

2.15. According to customer’s requirement pipe shall withstand the tests specified PP.2.16−2.18.

(Changed edition, Rev. N 8).

2.16. Heat-treated pipes up to 530 mm inclusive, must stand the test on the bend. The value of bending radius for pipe diameters up to 60 mm should be not less than 2.5for the base metal pipe with a diameter of over 60 to 530 mm — according to GOST 3728. By agreement between manufacturer and customer, the value of bending radius can be reduced.

(Changed edition, Rev. N 1, 8).

2.17. Heat treated over the entire volume of carbon steel pipes with a diameter from 30 to 159 mm with wall thickness of not more than 0.08shall withstand the test turn-up cuffs. The amount of flanging shall not be less than 24%, the width of the bent side, measured from the inner surface of the pipe shall be not less than 1.5 wall thickness of the pipe.

The angle of the flanging shall be:

90° — for pipes of steel grades 08, 10, 15, ST2;

60° — for pipes of steel grades 20, ft3, FT4.

(Changed edition, Rev. N 6, 8).

2.18. Pipe with a diameter of 50 mm or more for groups A and b should stand the test of welded joint tensile.

The tensile strength of welded joints of pipes with diameter from 219 to 530 mm, subjected to heat treatment in the entire volume of the pipe or heat treatment of welded joints must conform to the standards specified in table.1. The tensile strength of welded joints of pipes with diameter from 50 up to 203 mm, subjected to heat treatment in the entire volume of the pipe or heat treatment of the welded joint should be not less than 0.9 from the norms specified in tab.1.

The tensile strength of welded joints of pipes without heat treatment with a diameter of 50 mm and must conform to the standards specified in table.2 and 3.

(Changed edition, Rev. N 1, 3).

2.19. The pipe must be sealed.

(Changed edition, Rev. N 3).

3. ACCEPTANCE RULES

3.1. Pipes take by the parties. The party should consist of pipes of the same size, same steel, same heat treatment and one group of manufacturing, followed by one document on quality according to GOST 10692 with the addition of the chemical composition of the steel in accordance with the document on the quality of the manufacturer of the workpiece.

The number of pipes in the lot shall be no more PCs.;

1000 — with the diameter up to 30 mm;

600 — with a diameter of over 30 to 76 mm;

400 — if the diameter of SV 76 to 152 mm;

200 — with a diameter of 152 mm. St

(Changed edition, Rev. N 1).

3.2. The differences in the assessment of the quality of the chemical composition to check select at least one tube from the party.

3.3. The control of dimensions and surface quality of the pipe is subjected to each pipe. Allowed control of size and surface carried out selectively on each lot with a single-stage normal control level in accordance with the requirements of GOST 18242*. The control plans established by agreement between manufacturer and customer.
________________
* On the territory of the Russian Federation GOST R 50779.71−99**.
** Cm. notes of FGUP «STANDARTINFORM».

(Changed edition, Rev. N 3, 8).

*3.3. Welds pipe groups A, B and C should be subjected to 100% nondestructive control methods.
________________
* See notes of FGUP «STANDARTINFORM».**

** In accordance with the amendment published in IMS No. 5, 2005, paragraphs n.3.3 and in italics (see below) should be removed from the text. — Note the manufacturer’s database.


When conducting nondestructive testing on the perimeter of the entire pipe hydraulic testing of pipes of the kind I shall be allowed not to carry out.

Allowed to replace non-destructive testing of welded joints of pipes of species I to produce test each pipe, high hydraulic pressure calculated in accordance with the requirements of GOST 3845 with allowable stress equal to 85% of the yield strength for pipes with a diameter of 273 mm or more and 75% of the yield strength for pipe diameters less than 273 mm and not greater than 12 MPa (120 kgf/cm).

Pipe group D should be tested by hydraulic pressure or control of the weld non-destructive methods.

(Changed edition, Rev. No. 5, Amendment).

For the quality control of the weld non-destructive methods, an additional control hydraulic pressure to 15% of the pipes from the party.

By agreement between manufacturer and customerof om testing of tubes by hydraulic pressure is not performed.

(Added, Rev. N 3); (Revised edition, Edit. N 8).

3.4. To check the height of the inner bead selected 2% of the pipes from the party.

3.5. Test flattening, distribution, turn-up cuffs, bend, impact strength, tendency of the base metal pipe to mechanical aging, tensile base metal and weld two pipes taken away from the party.

The yield strength of the base metal pipe is determined by the requirement of the customer.

Pipe, tested for flattening, the test distribution is not subjected to.

(Changed edition, Rev. N 1, 6, 8).

3.6. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of pipes selected from the same batch.

The results of repeated tests apply to the entire party.

3.7. Place the welding seams of the tubes of the groups A, B, C should be controlled by non-destructive methods, and the plumbing has been tested by the hydraulic pressure in accordance with the requirements of section 3.3 a of this standard.

Place the welding seams of the tubes of group D must undergo nondestructive testing methods, or the pipe after the repair should be tested by hydraulic pressure.

(Changed edition, Rev. N 5).

4. TEST METHODS

4.1. For quality control of each selected pipe cut one sample for each test and the impact test — three samples for each test temperature.

4.2. Chemical composition of steel is determined according to GOST 22536.0 to GOST 22536.6, 12344 GOST-GOST 12354 series. Samples for the determination of the chemical composition selected according to GOST 7565.

The equivalent carbon (metal) low-alloy steel grades calculated by the formula:

,

where , , , , , ,  — mass fraction in steel carbon, manganese, chromium, molybdenum, vanadium, copper, Nickel, %.

(Amended, ISM, N 6).

4.3. Inspection of the pipe surface is carried out visually. The depth of the defects check adproval or other means.

Allowed inspection of surface and pipe sizes to perform non-destructive methods for technical documentation.

(Changed edition, Rev. N 1).

4.4. Pipe is measured:

the length — measuring tape according to GOST 7502;

the outer diameter and ovality — adjustable measuring caliper according to GOST 2216 or a caliper according to GOST 166 or micrometer according to GOST 6507;

the inner diameter of the tube according to GOST 14810 or caliber according to GOST 2015, or by subtracting from the outside diameter of the two thicknesses of the walls;

curvature — straightedge according to GOST 8026 probe;

the thickness of the wall, raznoshennoy and height of the inner bead — micrometer according to GOST 6507или santomera according to GOST 11358;

the offset edges — a template for technical documentation or micrometer according to GOST 6507, or gauges according to GOST 162;

cosine Reza parameter is ensured by design of equipment for processing of pipe ends;

the angle of the bevel of the bevel — protractor according to GOST 5378. The differences in the assessment of the quality of the cut cosine check a square and feeler;

the mechanical ring on the ends of the pipes with a ruler according to GOST 427;

the depth of surface defects — gauges according to GOST 162. The measurement of the outer diameter of the pipe is carried out at a minimum distance of 15 mm from the end of the pipe for pipes with a ratio of outer diameter to wall thickness equal to less than 35; not less than 2/3 — for pipes with a ratio of over 35 to 75; at least  — for pipes with a ratio of more than 75.

(Changed edition, Rev. N 1, 3).

4.5. Test for impact strength is carried out on longitudinal samples of type 3 according to GOST 9454, cut from a pipe section located at an angle of about 90° to the weld seam.

Toughness is defined as the arithmetic average of the results of tests of three samples. On one of the samples allowed the reduction of impact strength of 9.8·10j/m(1 kgf·m/cm).

Test temperature the impact strength indicated by the customer in the order for the supply of pipes.

(Changed edition, Rev. N 1, 6, 8).

4.6. The tendency of the base metal pipe to mechanical aging is determined according to GOST 7268. It is allowed to edit samples static load.

4.7. The tensile test is carried out according to GOST 10006 on the longitudinal proportionate short sample.

When tested on samples of the segment cut from the last section of the site, located at an angle of about 90° to the weld seam, and the estimated part is not correct.

Instead of the allowed tensile tests to control temporary resistance, yield strength and elongation of pipes by nondestructive methods.

If there are differences in the test pipes is carried out according to GOST 10006.

(Changed edition, Rev. N 1, 7).

4.8. Test flattening is carried out according to GOST 8695.

4.9. Test distribution is carried out according to GOST 8694 on the mandrel with a taper of 30°. Use mandrels with taper of 1:10 and deburring on a plot of the distribution.

(Changed edition, Rev. N 3).

4.10. The test bend is carried out according to GOST 3728. Pipe with diameter of 114 mm test on the cut longitudinal strips of width 12 mm.

4.11. Test turn-up cuffs is carried out according to GOST 8693. On the section of the flanging is allowed deburring.

4.12. Determination of strength of welded joints of pipes is carried out on ring samples according to the technical documentation.

On pipes with a diameter of 219 mm is permitted to conduct the test according GOST 6996 the samples of a type XII with the removed reinforcement of welded joints cut perpendicular to the pipe axis, using the static load when editing samples.

(Changed edition, Rev. N 7).

4.13. Hydraulic testing of the pipes is carried out according to GOST 3845 delayed under pressure of 5 p.

4.14. Control of the weld carried out by nondestructive methods (ultrasonic, eddy current, magnetic or x-ray equivalent method) according to the technical documentation.

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage — by GOST 10692.

NOTES OF FGUP «STANDARTINFORM»

1 Listed under the «Information data» to GOST 10705−80:

GOST 380−94 is replaced by GOST 380−2005;

GOST 18242−72 replaced with GOST R ISO 2859−1-2007.

2 In the information index «National standards» N published 5−2005 amendment


to GOST 10705−80 electrically welded steel Tubes. Specifications [see Edition (June 2001) with Amendments No. 1, 2, 3, 4, 5 and a collection of «Pipes and fittings to them. Part 3. Pipe welded. Tubes profile» (published in 2001)]