GOST 8713 79 welds. Reference regulatory and technical documents

GOST 8713-79

INTERSTATE STANDARD

SUBJECTION WELDING CONNECTIONS WELDED

MAIN TYPES, CONSTRUCTION ELEMENTS

AND DIMENSIONS

Official edition

Standartinform

UDC 621.791.753.5.052:006.354

Group B05

INTERSTATE STANDARD

SUBJECT WELDING. WELDED CONNECTIONS

Main types, structural elements and dimensions

Flux welding. Welded joints.

Maih types design elements and dimensions

MKS 25.160.40 OKP 06 0200 0000

Introduction date 01.01.81

1. This standard applies to joints made of steels, as well as alloys on iron-nickel and nickel bases, performed by submerged arc welding, and establishes the main types, structural elements and dimensions of welded joints.

The standard does not apply to welded joints of steel pipelines in accordance with GOST 16037.

2. The following designations for submerged arc welding methods are accepted in the standard:

AF - automatic on weight;

AFF - automatic on a flux pad;

AFm - automatic on a flux-copper lining;

AFO - automatic on the remaining lining;

AFp - automatic on a copper slider;

AFsh - automatic with preliminary imposition of a welding seam;

AFk - automatic with preliminary welding of the root of the seam;

MF - mechanized on weight;

MFO - mechanized on the remaining lining;

MFsh - mechanized with a preliminary imposition of a welding seam;

MFK - mechanized with preliminary welding of the root of the seam.

3. The main types of welded joints are given in Table. 1, sections of previously applied welding seams are conditionally blackened.

Publication^official Reprint prohibited

S. 2 GOST 8713-79

GOST 8713-79 S. 3

trained

The nature of the weld

Cross section shape

prepared edges

weld

Conditional

designation

welded

connections

Butt

One-sided

With a broken bevel on one edge

One-sided

S. 4 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of welded parts, mm

Conditional

designation

welded

connections

One-way castle

Bevelled

Butt

bilateral

GOST 8713-79 S. 5

trained

The nature of the weld

Cross section shape

prepared edges

weld

Thickness of welded parts, mm

Conditional

designation

welded

connections

One-way castle

With crooked-

Butt

non-other beveled edges

bilateral

With broken beveled edges

One-sided

With broken beveled edges

One-way castle

With two symmetrical double-sided bevels

S. 6 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of welded parts, mm

Conditional

designation

welded

connections

With two symmetrical beveled edges

Butt

With two symmetrical double-sided curved edges

With two asymmetrical beveled edges

With one edging

One-sided

GOST 8713-79 S. 7

S. 8 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of welded parts, mm

Conditional

designation

welded

connections

With a curved bevel of one edge

Tavrovoe

bilateral

With two symmetrical bevels of one edge

With two asymmetrical bevels of one edge

GOST 8713-79 S. 9

Connection type	trained	The nature of the weld	Cross section shape		weldable parts, mm	Conditional designation welded connections
			prepared edges	weld
Tavrovoe	With two symmetrical curved bevels of one edge	bilateral
Overlapping	Without beveled edges	One-sided

		bilateral

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

4. Structural elements of welded joints and their dimensions must correspond to previously applied welding seams, conditionally blackened.

Dimensions, mm

indicated in the table. 2-52, sections

table 2

Size for reference.

P. 10 GOST 8713-79

o.6S^a< 0,7 S

			e, no more

Note. The absence of convexity of the reverse side of the seam and local concavities with a depth of not more than 0.1 l are allowed with complete penetration of the edges. The value of ei must be between 4 mm and 0.5e.

GOST 8713-79 S. 11

			e, no more







St. 10 to 12

Conditional

designate

welded

connections

The value of ei must be between 4 mm and 0.5e.

Table 6

Note. The absence of convexity of the reverse side of the seam and local concavities with a depth of not more than 0.1s are allowed with full penetration of the edges.

P. 12 GOST 8713-79

Conditional

welded


	t, not less	e, no more








St. 10 to 12

Note. Welding method MFO for s > 6 mm is not recommended. The thickness of the lining should be at least 0.25s but not less than 1.5mm.

Dimensions, mm

Table 8

Conditional

designate

welded

connections


				e, no more

Note. Welding method MFsh for thicknesses 3 mm > s > 6 mm is not recommended.

Dimensions, mm

Table 10

P. 14 GOST 8713-79

Conditional designate welded	Structural elements			e, no more
		weld
			St. 22 to 26
			St. 26 to 30




			St. 16 to 24
			St. 24 to 32

* Before welding the first seam, the gap for 1/3 of the thickness of the base metal must be filled with flux, and then for the remaining 2/3 with grains of

electrode wire, pellets or other granular metal.

Dimensions, mm

Table 11

Conditional

designation

welded

connections

Structural elements

prepared edges of welded parts

weld

Welding method

e v no more

St. 22 to 26

St. 26 to 32

GOST 8713-79 S. 15

Conditional

designation

welded

connections

Note. The absence of convexity of the reverse side of the seam and local concavities with a depth of not more than 0.1s are allowed with full penetration of the edges.

Dimensions, mm

Table 13


	8, not less	t, not less


St. 10 to 12
St. 12 to 14
St. 14 to 16
St. 16 to 18
St. 18 to 20
St. 20 to 24
St. 24 to 30

P. 16 GOST 8713-79





St. 10 to 12
St. 12 to 14
St. 14 to 16
St. 16 to 20
St. 20 to 24
St. 24 to 30

Table 15

Dimensions, mm

Welded joint symbol

Structural elements

prepared edges of welded parts

weld

GOST 8713-79 S. 17

P. 18 GOST 8713-79

Conditional

designation

welded

connections

Structural elements

prepared edges of welded parts

weld

Welding method





St. 10 to 12
St. 12 to 14
St. 14 to 20
St. 20 to 24

GOST 8713-79 S. 19

Conditional

designation

welded

connections

Structural elements

Welding method

prepared edges of welded parts

weld

Dimensions, mm

Table 21


	8, not less	t, not less



St. 10 to 12
St. 12 to 14
St. 14 to 16
St. 16 to 18
St. 18 to 20
St. 20 to 22
St. 22 to 24
St. 24 to 26
St. 26 to 28
St. 28 to 30

S. 20 GOST 8713-79

Conditional

designation

welded

connections


	Previous ogl.	Previous ogl.



St. 10 to 12
St. 12 to 14
St. 14 to 16
St. 16 to 18
St. 18 to 20
St. 20 to 22
St. 22 to 24
St. 24 to 26
St. 26 to 28
St. 28 to 30

Dimensions, mm

Table 23

Conditional

welded

connections

Structural elements

prepared edges of welded parts

weld

St. 16 to 20

St. 20 to 24

St. 24 to 30

GOST 8713-79 S. 21

Conditional

designation

welded

connections

Dimensions, mm

Table 25






St. 10 to 12
St. 12 to 14

Conditional

welded

Dimensions, mm

2 0 +1 '° -1.5

Table 26

Welded joint symbol

Structural elements

prepared edges of welded parts

weld

Welding method

St. 18 to 24

St. 24 to 30

S. 22 GOST 8713-79




St. 16 to 20
St. 20 to 25
St. 25 to 30
St. 30 to 35
St. 35 to 40
St. 40 to 45
St. 45 to 50
St. 50 to 55
St. 55 to 60

Conditional

welded

Dimensions, mm

Table 28

Conditional

welded




St. 16 to 20
St. 20 to 25
St. 25 to 30
St. 30 to 35
St. 35 to 40
St. 40 to 45
St. 45 to 50

GOST 8713-79 S. 23

S. 24 GOST 8713-79


	Previous ogl.		Previous ogl.

St. 20 to 22
St. 22 to 24
St. 24 to 26
St. 26 to 28
St. 28 to 30
St. 30 to 32
St. 32 to 34
St. 34 to 36
St. 36 to 38
St. 38 to 40
St. 40 to 42
St. 42 to 45
St. 45 to 48
St. 48 to 50
St. 50 to 55
St. 55 to 60
		Table 31

	Previous ogl.		Previous ogl.

St. 16 to 20
St. 20 to 25
St. 25 to 30
St. 30 to 35
St. 35 to 40
St. 40 to 45
St. 45 to 50
St. 50 to 55
St. 55 to 60

Conditional

designation

welded

connections

Dimensions, mm

Conditional

designation

welded

connections

GOST 8713-79 S. 25

Conditional

designation

welded

connections

Note. With the MF welding method, the bluntness is c = 3 + 1 mm.

Table 33

Dimensions, mm

Conditional

welded

connections

Dimensions, mm

Table 34

Welded joint symbol

Structural elements

prepared edges of welded parts

weld

Welding method

18 to 25 St. 25 to 40 St. 40 to 50

St. 50 to 60

P. 26 GOST 8713-79

Table 36




St. 50 to 55
St. 55 to 60
St. 60 to 65
St. 65 to 70
St. 70 to 80
St. 80 to 90
St. 90 to 100
St. 100 to 110
St. 110 to 115
St. 115 to 120
St. 120 to 125
St. 125 to 130
St. 130 to 140
St. 140 to 150
St. 150 to 160

Conditional

welded

GOST 8713-79 S. 27

Conditional

welded


	Previous ogl.	Previous ogl.

St. 24 to 26
St. 26 to 30
St. 30 to 32
St. 32 to 34
St. 34 to 36
St. 36 to 38
St. 38 to 42
St. 42 to 45
St. 45 to 50
St. 50 to 55
St. 55 to 60

S. 28 GOST 8713-79

Conditional

designation

welded

connections

Welding method

* Size for reference.

Dimensions, mm

Table 40

Conditional

designation

welded

connections

Welding method

GOST 8713-79 S. 29

Conditional

designation

welded

connections

Welding method

Previous ogl.

St. 12 to 14

St. 14 to 20

Dimensions, mm

Table 42

Conditional

welded

connections

S. 30 GOST 8713-79

Conditional

designation

welded

connections

Welding method

Previous ogl.

Welding method

Previous ogl.

Dimensions, mm

Table 45

Conditional

designation

welded

connections

Welding method

Previous ogl.

St. 10 to 14

St. 14 to 20

GOST 8713-79 S. 31

Conditional

designation

welded

connections

Structural elements

prepared edges of welded parts

weld

St. 9 to 14 St. 14 to 20 St. 20 to 24 St. 24 to 26 St. 26 to 28

St. 28 to 30

Previous ogl.

Dimensions, mm

Table 47

Conditional

designation

welded

connections

Structural elements

Welding method

prepared edges of welded parts

weld


		Previous off

St. 16 to 18
St. 18 to 20
St. 20 to 22
St. 22 to 24
St. 24 to 26
St. 26 to 28
St. 28 to 30

P. 32 GOST 8713-79

Conditional

designation

welded

connections

Welding method

Previous off

St. 18 to 22

St. 22 to 26

St. 26 to 30

St. 30 to 36

St. 36 to 40

Note. With the MF welding method, the bluntness is c = 3 + 1 mm.

Dimensions, mm

Table 49




St. 20 to 24
St. 24 to 28
St. 28 to 34
St. 34 to 40

GOST 8713-79 S. 33

Conditional

designation

welded

connections

Welding method

Conditional

designation

welded

connections

Welding method

Previous off

St. 10 to 20

Dimensions, mm

Table 52

Conditional

designation

welded

connections

Welding method

Previous off

St. 10 to 20

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

P. 34 GOST 8713-79

5. When welding circumferential welds of butt joints, it is allowed to increase the convexity g, gi up to 30%.

(Revised edition, Rev. No. 3).

6. Welded joints T7, T8, T4 should be made in the “boat” position in accordance with GOST 11969*. Fillet welds without beveled edges can be performed both in the lower position and in the “boat” position in accordance with GOST 11969.

7. The backing seam and root welding can be performed by any arc welding method.

8. Welding of butt joints of parts of unequal thickness with a difference not exceeding the values \u200b\u200bspecified in table. 53, must be produced in the same way as parts of the same thickness; the structural elements of the prepared edges and the dimensions of the weld should be selected according to the greater thickness.

To make a smooth transition from one part to another, an inclined arrangement of the weld surface is allowed (Fig. 1).

Table 53 mm

With a difference in the thickness of the parts to be welded above the values \u200b\u200bspecified in Table. 53, on a part with a large thickness s h, a bevel should be made on one or both sides to the thickness of a thin part s, as indicated in Fig. 2, 3 and 4. In this case, the structural elements of the prepared edges and the dimensions of the weld should be chosen according to the smallest thickness.

9. The size and limit deviations of the leg of the fillet weld K, K\ must be established during design. In this case, the size of the leg should be no more than 3 mm for parts up to 3 mm thick inclusive and 1.2 thicknesses of a thinner part when welding parts with a thickness of more than 3 mm. Maximum deviations of the size of the leg of fillet welds from the nominal value are given in Appendix 3.

(Revised edition, Rev. No. 2).

10. (Deleted, Rev. No. 2).

11. Convexity or concavity of the fillet weld is allowed up to 30% of its leg. In this case, the concavity should not lead to a decrease in the value of the leg K p (Fig. 5), established during the design.

* Within the territory of Russian Federation GOST 11969-79 is valid.

Note. The leg K p is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam, any of the equal legs is taken for the leg K p, with an asymmetrical seam, the smaller one.

12. The minimum values of the legs of the fillet welds are given in Appendix 1.

13. When submerged arc welding is used instead of manual arc welding, the leg of the fillet weld of the design joint can be reduced to the values given in Appendix 2.

14. It is allowed to shift the welded edges before welding relative to each other no more than:

0.5 mm - for parts up to 4 mm thick;

1.0 mm - for parts with a thickness of 4-10 mm;

0.1 s mm, but not more than 3 mm - for parts with a thickness of more than 10 mm.

15. It is allowed to increase the size of the welds up to 30% of the nominal value in places of overlapping welds and in places where defects are corrected.

16. When preparing edges using hand tool limit deviations of the bevel angle can be increased up to ± 5°. In this case, the width of the seam, e, e, can be changed accordingly.

15, 16. (Introduced additionally, Amendment No. 2).

Note. The maximum value of the legs should not exceed 1.2 times the thickness of the thinner element.

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

Fillet weld leg for welding

manual arc	submerged
	wire diameter from 3 to 5		wire with a diameter of 1.4 to 2.5
	in the "boat" position	in the down position	in the "boat" position	in the down position

APPENDIX 3. (Introduced additionally, Amendment No. 2).

INFORMATION DATA

1. DESIGNED State Committee USSR according to standards, Academy of Sciences of the Ukrainian SSR

2. INTRODUCED by the USSR State Committee for Standards

3. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards dated 12/26/79 No. 5047

4. REPLACE GOST 8713-70

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

6. Checked in 1990. The validity period was removed by the Decree of the State Standard of the USSR of July 3, 1990 No. 2074

7. EDITION (September 2005) with Amendments No. 1, 2, 3 approved in August 1986, January 1989, July 1990 (IUS 11-86, 4-89, 10-90)

Editor M.I. Maksimova Technical editor N.S. Grishanova Proofreader E.D. Dulneva Computer Layout V. I. Grishchenko

Signed for publication on September 28, 2005. Format 60x84*/8. Offset paper. Headset Times. Offset printing. Conditions.print.l. 4.65. Uch.-ed.l. 3.90. Circulation 60 copies. Zach. 766. From 1941.

Federal State Unitary Enterprise "Standartinform", 123995 Moscow, Granatny per., 4. Typed in the IPK Standards Publishing House for PC.

Printed in the branch of FSUE "Standartinform" - type. "Moscow printer", 105062 Moscow, Lyalin per., 6.

5. When welding girth welds of butt joints, an increase in convexity is allowedg, g 1 to 30%.

Fillet welds without beveled edges are allowed to be performed both in the lower position and in the “boat” position in accordance with GOST 11969-79.

7. The backing seam and root welding can be performed by any arc welding method.

8. Welding of butt joints of parts of unequal thickness with a difference not exceeding the values \u200b\u200bspecified in should be carried out in the same way as parts of the same thickness; the structural elements of the prepared edges and the dimensions of the weld should be selected according to the greater thickness.

Table 53

Heck. 2

Heck. 4

9. Size and limit deviations of the leg of the fillet weld TO, TO 1 must be set during design. In this case, the size of the leg should be no more than 3 mm for parts up to 3 mm thick inclusive and 1.2 thicknesses of a thinner part when welding parts with a thickness of more than 3 mm. Limit deviations of the size of the leg of the fillet welds from the nominal value are given in.

(Revised edition, Rev. No. 2).

10. (Deleted, Rev. No. 2).

11. Convexity or concavity of the fillet weld is allowed up to 30% of its leg. In this case, the concavity should not lead to a decrease in the value of the leg TO n () established during design.

Heck. five

Notes e. Leg TO n is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam for the leg TO n any of the equal legs is accepted, with an asymmetrical seam - the smaller one.

12. The minimum values of the legs of the fillet welds are given in the recommended.

13. When using submerged arc welding instead of manual arc welding, the leg of the fillet weld of the design joint can be reduced to the values \u200b\u200bgiven in the recommended one.

14. It is allowed to mix the welded edges before welding relative to each other no more than:

0.5 mm - for parts up to 4 mm thick;

1.0 mm - for parts with a thickness of 4-10 mm;

0.1s mm, but not more than 3 mm - for parts with a thickness of more than 10 mm.

15. It is allowed in places where welds overlap and in places where defects are corrected, an increase in the size of the welds up to 30% of the nominal value.

16. When preparing edges using a hand tool, the limit deviations of the angle of the bevel edges can be increased up to ± 5 °. In this case, the width of the seam can be changed accordingly, e, e 1 .

15, 16. (Introduced additionally, Amendment No. 2).

Yield strength of welded steel, MPa	The minimum value of the legs of the fillet weld for a welded element of greater thickness
Yield strength of welded steel, MPa	3 to 4	St. 4 to 5	St. 5 to 10	St. 10 to 16	St. 16 to 22	St. 22 to 32	St. 32 to 40	St. 40 to 80
Up to 400
St. 400 to 450

Notes e. The maximum value of the legs should not exceed 1.2 times the thickness of the thinner element.

(Revised edition, Rev. No. 3).

Fillet weld leg for welding
manual arc	submerged
	wire diameter from 3 to 5		wire with a diameter of 1.4 to 2.5
	in the "boat" position	in the down position	in the "boat" position	in the down position





















	Nominal leg size of a fillet weld	Limit deviations of the size of the leg of the fillet weld from the nominal value
Up to 5
St. 5 to 8
St. 8 to 12
St. 12

(Introduced additionally, Amendment No. 2).

INFORMATION DATA

1. DEVELOPED by the USSR State Committee for Standards. Academy of Sciences of the Ukrainian SSR

DEVELOPERS:

I. A. Serebryanik(theme leader) ; L. M. Titkova; M. N. Shabalkin, A. A. Kazimirov(topic leader); V. P. Lozovsky

2. INTRODUCED by the USSR State Committee for Standards

3. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards No. 5047 dated December 26, 1979

4. REPLACE GOST 8713-70

5. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

6. REPUBLICATION (July 1993) with Amendments No. 1, 2, 3 approved in August 1986, January 1989, July 1990 (IUS 11-86, 4-89, 10-90)

When the welding process takes place, due to the oxygen environment, the surface of the parts to be welded begins to oxidize. To obtain high-quality welding of some metals, it is required to use special additives. Cleaned wire is used to protect the weld pool. The operation takes place with the help of an inert gas. The current GOST 8713–79 regulates submerged arc welding and the use of material to obtain a high-quality weld.

Appearance technological process Flux welding can be compared to an industrial revolution.

At first, this technology was used to process low-carbon steel. Today, this powder is used for welding absolutely any, even very refractory metals that are poorly welded.

Mechanized equipment and various semi-automatic systems allow the flux to be used for various operations:

Welding process

When parts are welded with flux, the arc is ignited with the original granular powder. The high temperature causes the electrode and its surrounding pellets to melt. The result is an elastic film that surrounds the weld area..

The film blocks the access of oxygen to the welding arc. The seam is obtained without cracks and shells. After cooling, the flux turns into slag, which evenly closes the seam. When the operation is completed, the hard crust is removed mechanically. The remaining flux is used for further operations. Such a "loose blanket" is suitable for work on various equipment.

Kinds of Granular Powder

For the implementation of the welding process, the flux is divided into several types. It all depends on the metal to be processed:

High alloy steel.
Non-ferrous alloys.
Carbon and alloy steel.

The production technique also divides this granular material into several subspecies:

Ceramic.
Fused.

Using the first type allows you to get an improved seam. Fused flux is distinguished by its pumice-like structure.

To obtain a ceramic material, first, special elements are subjected to fine grinding. Then mixed with extrusion, which helps to obtain a homogeneous mass. Liquid glass is added to it. Such a mixture is used only when it is required to carry out another alloying of the material of the weld.

After sintering the starting materials, carrying out their granulation, a fused flux is obtained. Granules for gas welding are divided into several subgroups. Separation depends on their chemical composition:

Important! To get a quality seam using automatic welding, you need to choose the right flux.

Positive characteristics

To implement this technology, the welding current is fed to the wire through a special mouthpiece. It is located approximately 70 mm from the edge. In this case, the electrode cannot overheat. Large current can be used for operation. The result is fast surfacing, good deep penetration. Very thick metal can be welded without pre-cutting the edges.

When automatic arc welding is performed, a constant weld size is maintained. It turns out the same shape and has a uniform chemical composition. The result is a high-quality connection with high stability. This technology does not allow the appearance of defects associated with the appearance of undercuts and metal fusion.

The flux protects against spatter. The surrounding surface will not need to be cleaned of welding spatter.

Flux welding is considered a high-performance process that saves a lot of energy, along with welding consumables. Savings reach 30-40%.

Negative sides

Unfortunately, with all its advantages, automatic welding has a number of disadvantages.. First of all, it is the high fluidity of the flux. welding operation can only be done below. The horizontal deviation from the main plane of the seam should be less than 10-15 degrees. Ignoring this requirement leads to the appearance of various defects. In addition, flux welding is not suitable for processing pipes with a diameter of less than 150 mm.