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GOST 8713 which is indicated for c21. Reference technical documents

GOST 8713-79

INTERSTATE STANDARD

SUBMERSIBLE WELDING WELDED CONNECTIONS

BASIC TYPES, CONSTRUCTION ELEMENTS

AND SIZES

Official edition

Standardinform

UDC 621.791.753.5.052: 006.354

Group B05

INTERSTATE STANDARD

SUBMERSIBLE WELDING. WELDED CONNECTIONS

Basic types, structural elements and dimensions

Flux welding. Welded joints.

Maih types design elements and dimensions

ISS 25.160.40 OKP 06 0200 0000

Date of introduction 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 welded joints.

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

2. The standard adopted the following designations for submerged-arc welding methods:

AF - automatic on weight;

AFF - automatic on a flux cushion;

AFM - automatic with a flux-copper lining;

AFo - automatic on the remaining lining;

AFp - automatic on a copper slide;

AFsh - automatic with preliminary weld seam;

AFK - automatic with preliminary weld root weld;

MF - mechanized by weight;

MFO - mechanized on the remaining lining;

MFSh - mechanized with preliminary weld seam;

МФк - mechanized with preliminary weld root welding.

3. The main types of welded joints are given in table. 1, the sections of the pre-applied weld seams are conventionally blackened.

Edition ^ official Reprinting prohibited

P. 2 GOST 8713-79

GOST 8713-79 S. 3

trained

Character weld

Cross-sectional shape

prepared edges

weld

Conditional

designation

welded

connections

Butt

Unilateral

With a broken bevel on one edge

Unilateral

P. 4 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of parts to be welded, mm

Conditional

designation

welded

connections

One-sided lock

Beveled

Butt

Double-sided

GOST 8713-79 S. 5

trained

The nature of the weld

Cross-sectional shape

prepared edges

weld

Thickness of parts to be welded, mm

Conditional

designation

welded

connections

One-sided lock

With crooked

Butt

bevelled edges

Double-sided

Broken bevel

Unilateral

Broken bevel

One-sided lock

With two symmetrical double-sided bevels

P. 6 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of parts to be welded, mm

Conditional

designation

welded

connections

With two symmetrical bevels

Butt

With two symmetrical double-sided curved bevels

With two asymmetrical bevels

Flanged on one edge

Unilateral

GOST 8713-79 S. 7

P. 8 GOST 8713-79

trained

The nature of the weld

prepared edges

weld

Thickness of parts to be welded, mm

Conditional

designation

welded

connections

With a curved bevel on one edge

Tavrovoe

Double-sided

With two symmetrical bevels on one edge

With two asymmetric bevels on one edge

GOST 8713-79 S. 9

Connection type	trained	The nature of the weld	Cross-sectional shape		welded parts, mm	Conditional designation welded connections
			prepared edges	weld
Tavrovoe	With two symmetrical curved bevels on one edge	Double-sided
Overlapping	No beveled edges	Unilateral

		Double-sided

(Modified edition, Amendments No. 2, 3).

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

Dimensions, mm

specified in table. 2-52, sections

table 2

The size is 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 no more than 0.1 l with complete penetration of the edges is allowed. The ei value must be between 4 mm and 0.5e.

GOST 8713-79 p. 11

			e, no more







St. 10 to 12

Conditional

designate

welded

connections

The ei value 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 no more than 0.1 s with complete penetration of the edges is allowed.

P. 12 GOST 8713-79

Conditional

welded


	t, not less	e, no more








St. 10 to 12

Note. It is not recommended to use the MFO welding method for s> 6 mm. The thickness of the lining must be at least 0.25s but at least 1.5mm.

Dimensions, mm

Table 8

Conditional

designate

welded

connections


				e, no more

Note. It is not recommended to use the MFSh welding method for thicknesses of 3 mm> s> 6 mm.

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 from

electrode wire, pellets or other granular metal.

Dimensions, mm

Table 11

Conditional

designation

welded

connections

Structural elements

prepared edges of the parts to be welded

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 no more than 0.1 s with complete penetration of the edges is allowed.

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 the parts to be welded

weld

GOST 8713-79 S. 17

P. 18 GOST 8713-79

Conditional

designation

welded

connections

Structural elements

prepared edges of the parts to be welded

weld

Welding method





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

GOST 8713-79 p. 19

Conditional

designation

welded

connections

Structural elements

Welding method

prepared edges of the parts to be welded

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

P. 20 GOST 8713-79

Conditional

designation

welded

connections


	Prev ogl.	Prev 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 the parts to be welded

weld

St. 16 to 20

St. 20 to 24

St. 24 to 30

GOST 8713-79 p. 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 the parts to be welded

weld

Welding method

St. 18 to 24

St. 24 to 30

P. 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 p. 23

P. 24 GOST 8713-79


	Prev ogl.		Prev 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

	Prev ogl.		Prev 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 p. 25

Conditional

designation

welded

connections

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

Table 33

Dimensions, mm

Conditional

welded

connections

Dimensions, mm

Table 34

Welded joint symbol

Structural elements

prepared edges of the parts to be welded

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 p. 27

Conditional

welded


	Prev ogl.	Prev 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

P. 28 GOST 8713-79

Conditional

designation

welded

connections

Welding method s

* Size for reference.

Dimensions, mm

Table 40

Conditional

designation

welded

connections

Welding method s

GOST 8713-79 p. 29

Conditional

designation

welded

connections

Welding method

Prev ogl.

St. 12 to 14

St. 14 to 20

Dimensions, mm

Table 42

Conditional

welded

connections

P. 30 GOST 8713-79

Conditional

designation

welded

connections

Welding method

Prev ogl.

Welding method

Prev ogl.

Dimensions, mm

Table 45

Conditional

designation

welded

connections

Welding method

Prev ogl.

St. 10 to 14

St. 14 to 20

GOST 8713-79 p. 31

Conditional

designation

welded

connections

Structural elements

prepared edges of the parts to be welded

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

Prev ogl.

Dimensions, mm

Table 47

Conditional

designation

welded

connections

Structural elements

Welding method

prepared edges of the parts to be welded

weld


		Prev 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

Prev 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, blunting 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 p. 33

Conditional

designation

welded

connections

Welding method

Conditional

designation

welded

connections

Welding method

Prev off

St. 10 to 20

Dimensions, mm

Table 52

Conditional

designation

welded

connections

Welding method

Prev off

St. 10 to 20

(Modified edition, Amendments No. 1, 2, 3).

P. 34 GOST 8713-79

5. When welding circular seams of butt joints, an increase in the convexity g, gi up to 30% is allowed.

(Modified edition, Amendment No. 3).

6. Welded joints T7, T8, T4 should be made in the "boat" position in accordance with GOST 11969 *. Corner seams without beveling edges are allowed to be performed both in the lower position and in the “boat” position in accordance with GOST 11969.

7. Back-weld and root-back welds are allowed to be performed by any arc welding method.

8. Welding of butt joints of parts of unequal thickness with a difference not exceeding the values indicated 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 for the greater thickness.

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

Table 53 mm

When the difference in the thickness of the parts to be welded exceeds the values indicated in the table. 53, on a part having a large thickness s h, a bevel must 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 welded seam should be selected at a lower thickness.

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

(Modified edition, Amendment No. 2).

10. (Deleted, Amendment No. 2).

11. The convexity or concavity of the fillet weld up to 30% of its leg is allowed. 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.

* In the territory Russian Federation GOST 11969-79 is in effect.

Note. The leg K p is the leg of the largest right-angled 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 asymmetric seam - the smaller one.

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

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 given in Appendix 2.

14. Allowed displacement of 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 in places where welded seams overlap and where defects are corrected to increase the size of seams up to 30% of the nominal value.

16. When preparing edges using hand tool limit deviations of the bevel angle of the edges 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 length of the legs should not exceed 1.2 times the thickness of the thinner element.

APPENDIX 1. (Modified edition, Amendment No. 3).

Fillet weld leg for welding

manual arc	submerged
	wire with a diameter of 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. DEVELOPED by the USSR State Committee for Standards, the Academy of Sciences of the Ukrainian SSR

2. INTRODUCED by the USSR State Committee for Standards

3. APPROVED AND PUT INTO EFFECT by the Decree of the USSR State Committee for Standards dated December 26, 79 No. 5047

4. REPLACE GOST 8713-70

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

6. Checked in 1990. The expiration date was lifted 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 printing on September 28, 2005. Format 60x84 * / 8. Offset paper. Times headset. Offset printing. Service l. 4.65. Academic and Publishing House 3.90. Circulation 60 copies. Zach. 766.Since 1941.

FSUE "Standartinform", 123995 Moscow, Granatny per., 4. Typeset in IPK Publishing house of standards on a PC.

Printed at the branch of the Federal State Unitary Enterprise "Standartinform" - type. "Moscow printer", 105062 Moscow, Lyalin per., 6.

5. When welding circular seams of butt joints, an increase in the bulge is allowed g, g 1 to 30%.

(Modified edition, Amendment No. 3).

6. Welded joints T7, T8, T4 should be made in the "boat" position in accordance with GOST 11969 *.

* On the territory of the Russian Federation, GOST 11969-79 is in force.

Corner seams without beveling edges are allowed to be performed both in the lower position and in the “boat” position in accordance with GOST 11969.

7. Back-weld and root-back welds are allowed to be performed by any arc welding method.

8. Welding of butt joints of parts of unequal thickness with a difference not exceeding the values indicated 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 for the greater thickness.

Table 53

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

When the difference in the thickness of the parts to be welded exceeds the values indicated in the table. 53, on a part with a large thickness s 1, a bevel must be made on one or both sides to the thickness of the thin part s as indicated in damn. 2, 3 and 4. In this case, the structural elements of the prepared edges and the dimensions of the welded seam should be selected at a lower thickness.

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

(Modified edition, Amendment No. 2).

10. (Deleted, Amendment No. 2).

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

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

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

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 given in the recommended Appendix 2.

14. It is allowed to mix the edges to be welded 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 in places where welded seams overlap and where defects are corrected to increase the size of seams up to 30% of the nominal value.

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

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

ANNEX 1

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		St. 10 to 16	St. 16 to 22	St. 22 to 32	St. 32 to 40	St. 40 to 80

St. 400 to 450

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

APPENDIX1 . (Modified edition, Amendment No. 3).

APPENDIX 2

Fillet weld leg for welding
manual arc	submerged
	wire with a diameter of 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

APPENDIX3 . (Introduced additionally, Amendment No. 2).

INFORMATION DATA

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

2. INTRODUCED by the USSR State Committee for Standards

3. APPROVED AND PUT INTO EFFECT by the Decree of the USSR State Committee for Standards dated December 26, 79 No. 5047

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

6. Checked in 1990. The expiration date was lifted 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)

5. When welding circular seams of butt joints, an increase in the bulge is allowed g, g 1 to 30%.

6. Welded joints T7, T8, T4 should be made in the "boat" position in accordance with GOST 11969-79.

Corner seams without bevelled edges are allowed to be performed both in the lower position and in the “boat” position in accordance with GOST 11969-79.

7. Back-weld and root-back welds are allowed to be performed by any arc welding method.

Table 53

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

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

(Modified edition, Amendment No. 2).

10. (Deleted, Amendment No. 2).

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

Note. Leg TO n is the leg of the largest right-angled 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 fillet welds are given in the recommended appendix 1.

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 given in the recommended Appendix 2.

14. It is allowed to mix the edges to be welded 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 in places where welded seams overlap and where defects are corrected to increase the size of seams up to 30% of the nominal value.

16. When preparing edges using a hand tool, the maximum deviations of the bevel angle can be increased up to ± 5 °. In this case, the seam width 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		St. 10 to 16	St. 16 to 22	St. 22 to 32	St. 32 to 40	St. 40 to 80

St. 400 to 450

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

(Modified edition, Amendment No. 3).

Fillet weld leg for welding
manual arc	submerged
	wire with a diameter of 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

(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(topic 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 PUT INTO EFFECT by the Decree of the USSR State Committee for Standards dated December 26, 79 No. 5047

4. REPLACE GOST 8713-70

5. REFERENCE REGULATORY 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)

Dimensions, mm

Symbol of the welded joint		Welding method	s	g ± 2	e
Symbol of the welded joint	weld	Welding method	s	g ± 2	Nominal	Prev off
T8		AF ; MF	16 to 18	4	25	+4 -7
			St. 16 to 22	5	30	+4 -8
			St. 22 to 26	6	36	+4 -10
			St. 26 to 30	7	40	+4 11
			St. 30 to 36	8	50	+4 -12
			St. 36 to 40	9	56	+4 -16

Note. With the welding method MF blunting With= 3 ± 1 mm.

Table 49

Dimensions, mm

	Structural elements		Welding method	s	h ± 1	g		g 1 ± 2	e		e 1
	prepared edges of the parts to be welded	weld	Welding method	s	h ± 1	Nominal	Prev off	g 1 ± 2	Nominal	Prev off	Nominal	Prev off
T4			AFsh ; Mfsh	20	7	6	± 2	3	26	+4 -7	13	± 3
				St. 20 to 24	7	7		3	26	+4 -7
				St. 24 to 28	8	8		4	29	+4 -8
				St. 28 to 34	10	10		5	35	+4-10	17
				St. 34 to 40	12	12	± 3	5	40	+4 -11	17

(Amendment, IUS 6-2007).

Table 50

Dimensions, mm

Conventional designation of the welded joint	Structural elements		Welding method	s	e ± 2	g ± 2
Conventional designation of the welded joint	prepared edges of the parts to be welded	weld	Welding method	s	e ± 2	g ± 2
T5			AF	30	16	6
				St. 30 to 34	17
				St. 34 to 40	18
				St. 40 to 42	19	7
				St. 42 to 45	20
				St. 45 to 50	26
				St. 50 to 55	26	8
				St. 55 to 60	28	8

Table 51

Dimensions, mm

Conventional designation of the welded joint	Structural elements		Welding method	s	b
Conventional designation of the welded joint	prepared edges of the parts to be welded	weld	Welding method	s	Nominal	Prev off
H1			AF ; MF	1 to 5	0	+1,0
				St. 5 to 10		+2,0
				St. 10 to 20		+3,0

Table 52

Dimensions, mm

Conventional designation of the welded joint	Structural elements		Welding method	s	b
Conventional designation of the welded joint	prepared edges of the parts to be welded	weld	Welding method	s	Nominal	Prev off
H2			AF ; MF	1 to 5	0	+1,0
				St. 5 to 10		+2,0
				St. 10 to 20		+3,0

(Modified edition, Amendments No. 1, 2, 3).

5. When welding circumferential seams of butt joints, an increase in the bulge is allowed g, g 1 to 30%.

6. Welded joints T7, T8, T4 should be performed in the "boat" position in accordance with GOST 11969-79.

Corner seams without bevelled edges are allowed to be performed both in the lower position and in the “boat” position in accordance with GOST 11969-79.

7. The back-weld and back-weld of the root of the seam are allowed to be performed by any arc welding method.

8. Welding of butt joints of parts of unequal thickness with a difference not exceeding the values indicated 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 for the greater thickness.

Table 53

To implement a smooth transition from one part to another, an inclined arrangement of the seam surface is allowed ().

When the difference in thickness of the parts to be welded exceeds the values specified in, on a part with a large thickness s 1, a bevel must be made on one or both sides to the thickness of the thin part s, as indicated on, and. In this case, the structural elements of the prepared edges and the dimensions of the welded seam should be selected at a lower thickness.

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

(Modified edition, Amendment No. 2).

10. (Deleted, Amendment No. 2).

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

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

13. When using submerged-arc welding, instead of the fillet weld leg of the calculated joint, it can be reduced to the values given in the recommended one.

14. The displacement of the welded edges before welding relative to each other is allowed 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 of overlap and in places of defect correction to increase the size of seams up to 30% of the nominal value.

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

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

Note: The maximum leg length should not exceed 1.2 times the thickness of the thinner element.

(Modified edition, Amendment No. 3).

Fillet weld leg for welding
manual arc	submerged
	wire with a diameter of 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
4	3	3	3	3
5	3	3	4	4
6	4	4	5	5
7	5	5	6	6
8	5	5	6	6
9	6	7	7	8
10	6	8	8	9
11	7	9	9	10
12	8	9	9	11
13	8	10	11	13
14	9	11	12	14
15	10	12	13	15
16	10	13	14	16
17	13	17	17	17
18	14	18	18	18
19	15	19	19	19
20	16	20	20	20
21	16	21	21	21
22	17	22	22	22
23	23	23	23	23
24	24	24	24	24
26	25	25	25	25

SUBMERSIBLE WELDING.
WELDED CONNECTIONS

MAIN TYPES, CONSTRUCTION ELEMENTS AND DIMENSIONS

GOST 8713-79

PUBLISHING STANDARDS

Moscow

STATE STANDARD OF THE UNION OF SSR

Date of introduction 01.01.81

The standard does not apply to welded joints of steel pipelines in accordance with GOST 16037-80.

2. The standard adopted the following designations for submerged-arc welding methods:

AF - automatic on weight;

AFF - automatic on a flux cushion;

AFM - automatic with a flux-copper lining;

AFo - automatic on the remaining lining;

AFp - automatic on a copper slide;

AFsh - automatic with preliminary weld seam;

AFK - automatic with preliminary weld root weld;

MF - mechanized by weight;

MFO - mechanized on the remaining lining;

MFSh - mechanized with preliminary weld seam;

МФк - mechanized with preliminary weld root welding.

(Modified edition, Amendment No. 2).

3. The main types of welded joints are given in, sections of pre-applied back welds are conventionally blackened.

GOST 8713 which is indicated for c21. Reference technical documents

GOST 8713-79 S. 3

P. 4 GOST 8713-79

GOST 8713-79 S. 5

P. 6 GOST 8713-79

GOST 8713-79 S. 7

P. 8 GOST 8713-79

GOST 8713-79 S. 9

GOST 8713-79 p. 11

P. 12 GOST 8713-79

P. 14 GOST 8713-79

GOST 8713-79 S. 15

P. 16 GOST 8713-79

GOST 8713-79 S. 17

P. 18 GOST 8713-79

GOST 8713-79 p. 19

P. 20 GOST 8713-79

GOST 8713-79 p. 21

P. 22 GOST 8713-79

GOST 8713-79 p. 23

P. 24 GOST 8713-79

P. 26 GOST 8713-79

GOST 8713-79 p. 27

P. 28 GOST 8713-79

GOST 8713-79 p. 29

P. 30 GOST 8713-79

GOST 8713-79 p. 31

P. 32 GOST 8713-79

GOST 8713-79 p. 33

P. 34 GOST 8713-79

ANNEX 1

APPENDIX 2

APPENDIX 3

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