GOST 23518-79
GOST 23518−79 Arc welding in protective gases. Welded joints at acute and obtuse angles. Main types, design elements and dimensions
GOST 23518−79
Group В05
INTERSTATE STANDARD
ARC WELDING IN PROTECTIVE GASES. WELDED JOINTS AT ACUTE AND OBTUSE ANGLES
Main types, design elements and dimensions
Cas-shielded arc welding. Welded joints. Main types, design elements and dimensions
ISS 25.160.40
Date of introduction 1980−01−01
Resolution of the USSR State Committee for standards from
Limitation of actions taken by Protocol No. 4−93 of the Interstate Council for standardization, Metrology and certification (ICS 4−94)
REPRINTING. February 2011
1. This standard establishes the basic types, design elements and dimensions welded joints of steels and iron-Nickel alloys and Nickel-based performed by arc welding in shielding gases.
2. The following notation of welding methods:
IN in an inert gas consumable electrode without filler metal;
Of InP in an inert gas non-consumable electrode with filler metal;
IP — in inert gases and their mixtures with carbon dioxide and oxygen consumable electrode;
Up — in carbon dioxide and its mixtures with oxygen consumable electrode.
3. Main types of welded joints shall be as specified in table.1.
4. Constructive elements of welded joints, their dimensions and limit deviations thereon shall be as specified in table.2−20.
Table 1
| Type United tion |
Form prepared edges | Nature made seam |
The cross sectional shape of the prepared edges and welding seam | The thickness of the parts to be welded, mm, for welding methods | Angle connection details |
The symbol of connection | |||
| IN | InP | SP | Pack | ||||||
| Corner | Bevel |
Unilateral removable or remaining steel lining |
0,5−3,0 | 0,8−3,0 | 0,8−4,0 | 0,8−8,0 | 179−91 | U2 | |
| Unilateral | 0,5−4,0 - |
0,8−6,0 - |
0,8−6,0 6,0−30,0 |
0,8−6,0 6,0−30,0 |
179−91; 89−5 135−91; 89−5 |
U1 | |||
| Bilateral | 3−6 - - |
3−6 3−10 - |
3−6 3−30 - |
3−12 3−30 3−60 |
179−136 135−91; 89−45 135−91 |
U3 | |||
| With bevel | Unilateral | - | 3−10 | 3−10 | 5−40 | 179−136; 89−46 |
Y4 | ||
| Unilateral removable or remaining lining |
- | 3−10 | 3−10 | 5−40 | 179−136 | U7 | |||
| Bilateral | - | 3−10 | 3−10 | 5−40 | 179−136; 89−46 |
V5 | |||
| With two bevels one edge |
Bilateral | - |
6−20 | 6−20 | 6−100 | 179−165; 80−75 |
Y6 | ||
| With two bevels one edge and one sloping second edge |
- |
6−20 | 6−20 | 6−120 | 179−36 | U8 | |||
| The beveled two edges | Unilateral | - | 3−10 3−20 |
3−10 3−20 |
3−60 |
179−122 89−61 179−142; 89−71 |
U9 | ||
| Bilateral | - |
3−10 3−20 |
3−10 3−20 |
3−60 |
179−122 89−61 179−142; 89−71 |
U10 | |||
| T — | Without bevel edges |
Unilateral | - |
0,8−10,0 | 0,8−40,0 | 0,8−40,0 | 91−175 | T1 | |
| Bilateral | - |
0,8−10,0 | 0,8−40,0 | 0,8−40,0 | 91−135; 89−45 |
T2 | |||
| With bevel | Unilateral | - |
0,8−10,0 | 0,8−40,0 | 0,8−40,0 | 89−45; 91−135 |
T5 | ||
| Bilateral | - |
0,8−10,0 | 0,8−40,0 | 0,8−40,0 | 89−45; 91−135 |
T6 | |||
| Unilateral |
- |
4,0−10,0 | 4,0−10,0 | 4,0−40,0 | 91−134 | T3 | |||
| Bilateral | - |
4,0−10,0 | 4,0−10,0 | 4,0−40,0 | 91−134 | T4 | |||
| With two bevels one edge |
Bilateral | - |
6−20 | 6−60 | 6−20 | 91−100; 89−80 | T7 | ||
| With two asymmetrical bevels one edge |
- |
- |
12−100 | 12−100 | 101−110; 79−70 | T8 | |||
| With two curved bevels one edge |
- | - | 18−100 | 18−100 | 91−105; 89−75 | T9 | |||
Table 2
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | SPO- sob svar- Ki |
|
| ||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | ||||||
| 179−160 | 159−136 | 135−91 | ||||||||||
| U2 | IN | From 0.5 to 3.0 |
|
|
0 | +0,5 | 0 | ±0,5 | ||||
| InP | From 0.8 to 1.0 |
|
0,5 | |||||||||
| SV. 1.0 to 2.0 |
+1,0 | |||||||||||
| SV. Of 2.0 to 3.0 |
1 | ±1,0 | 1,0 | |||||||||
| SP | From 0.8 to 1.0 |
|
0 | 0,5 | ||||||||
| SV. 1.0 to 2.0 |
+1,5 | 1,0 | ||||||||||
| SV. 2.0 to 4.0 |
1 | +1,0 | 1,5 | 3 | ||||||||
| Pack | From 0.8 to 1.0 |
1,0 | ||||||||||
| SV. 1.0 to 3.0 | ||||||||||||
| SV. 3,0 to 4.0 |
1,5 | |||||||||||
| SV. Of 4.0 to 6.0 |
2 | ±1,0 | 2,0 | ±1,0 | ||||||||
| SV. Of 6.0 to 8.0 | ||||||||||||
Table 3
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
|||||||||||
| prepared edges of the welded parts | weld |
| ||||||||||||
| 179−160 | 159−136 | 135−91 | 89−61 | 60−46 | 45−5 | Nomin. | Pred. off. |
Nomin. | Pred. off. | |||||
| U1 | IN | 0.5 to 1.0 |
|
|
|
|
1,75 |
2 |
0 | +0,5 | 0,5 | ±0,5 | ||
| SV. 1,0 to 2.0 |
+1,0 | 1,5 | ||||||||||||
| SV. 2.0 to 4.0 |
+1,5 | |||||||||||||
| InP SP Pack |
From 0.8 to 2.0 |
|
+0,5 | 1,0 | ||||||||||
| SV. 2.0 to 4.0 |
1,5 | |||||||||||||
| SV. Of 4.0 to 6.0 |
+1,0 | |||||||||||||
| Pack SP |
SV. Of 6.0 to 30.0 |
- | - | 2 | +2,0 -1,0 | 2,0 | +1,0 To 2.0 | |||||||
Table 4
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
||||||||||||
| homework- Lenno edges of the welded parts |
weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||||
| 179−160 | 159−136 | 135−91 | 89−61 | 60−45 | 179−91 | 89−45 | |||||||||
| U3 | IN | 3 up to 4 |
|
|
- | - | - | no more than 8 |
3 (reference) | 0 | +0,5 | 0 | +0,5 | ||
| SV. 4 to 6 |
+1,0 | ||||||||||||||
| InP SP |
3 up to 4 |
|
|
1,75 |
1 | ±1,0 | |||||||||
| SV. 4 to 6 | |||||||||||||||
| SV. 6 to 10 |
- | 2 | +2,0 -1,0 | ||||||||||||
| SP | SV. 10 up to 30 | ||||||||||||||
| Pack | 3 up to 4 |
|
|
( | |||||||||||
| SV. 4 to 6 |
| ||||||||||||||
| SV. 6 to 12 |
|
2 | |||||||||||||
| SV. 12 to 14 |
- |
| |||||||||||||
| SV. 14 to 18 | |||||||||||||||
| SV. 18 up to 30 | |||||||||||||||
| SV. 30 to 60 |
|
- | - | not more than 10 | |||||||||||
Table 5
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
|
| ||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||
| 179−136 | 89−46 | SV. 90 | Up to 90 | ||||||||||
| Y4 | InP SP |
3 to 6 |
1,4 |
1,5 |
|
|
1 | ±1,0 | 1 | ±1,0 | 50 | ||
| SV. 6 to 10 |
1,4 | ||||||||||||
| Pack | From 5 to 8 |
1,1 |
2 | 45 | |||||||||
| SV. 8 to 10 |
| ||||||||||||
| SV. 10 to 30 |
|
0,9 |
2 | +1,0 To 2.0 | |||||||||
| SV. 30 to 40 |
- | ||||||||||||
Table 6
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
|
| ||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | Nomin. | Pred. off. | |||||
| 179−136 | |||||||||||||
| U7 | InP SP |
3 to 6 |
1,4 |
|
0 | +3 | 1,0 | ±1,0 | 1 | +0,5 A 1.0 |
50 | ||
| SV. 6 to 10 |
1,4 |
1,5 | ±1,0 | ||||||||||
| Pack | From 5 to 8 |
1,1 |
2 | ±1 | 0 | 3.0 a | 45 | ||||||
| SV. 8 to 10 |
| ||||||||||||
| SV. 10 to 30 |
Three | ±2 | 2 | +1,0 To 2.0 | |||||||||
| SV. 30 to 40 |
4 | ||||||||||||
Table 7
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
|
| |||||||||||
| homework- Lenno edges of the welded parts |
weld |
| ||||||||||||||
| 179−136 | 89−46 | SV. 90 | Up to 90 | SV. 90 | Up to 90 | Nomin. | Pred. off. |
Nomin. | Pred. off. | |||||||
| V5 | InP SP |
3 to 6 |
1,4 |
1,5 |
Not 6 more |
3 (reference) |
|
|
1,0 | +1,0 | 1,0 | +0,5 A 1.0 |
50 | |||
| SV. 6 to 10 |
1,4 |
No more than 8 | 1,5 | ±1,0 | ||||||||||||
| Pack | From 5 to 8 |
1,1 |
2,0 | +1,0 To 2.0 |
45 | |||||||||||
| SV. 8 to 10 |
| |||||||||||||||
| SV. 10 to 30 |
|
0,9 |
2,0 | +1,0 To 2.0 | ||||||||||||
| SV. 30 to 40 |
- | |||||||||||||||
Table 8
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
|
|||||||||||||||||||||||||
| no more | grad |
Nomin. | Pred. off. | |||||||||||||||||||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | over 90 | up to 90 | ||||||||||||||||||||||
| 179−175 | 89−85 | 174−170 | 84−80 | 169−165 | 79−75 | 174−170 | 84−80 | 169−165 | 79−75 | SV. 90 | Up to 90 | Nomin. | Pred. off. |
Nomin. | Pred. off. | |||||||||||||
| Y6 | InP SP |
6 up to 20 |
|
0,8 |
0,8 |
0,7 |
0,9 |
1,2 |
|
|
|
|
1 | ±1 | 1 | ±1 | 1 | ±1 | 50 | 1 | ±1 | |||||||
| Pack | 6 up to 20 |
0,8 |
2 | +1 -2 |
45 | |||||||||||||||||||||||
| SV.20 up to 30 |
0,7 |
2 | +1 -2 |
2 | +1 -2 | |||||||||||||||||||||||
| SV.30 up to 70 |
0,6 | |||||||||||||||||||||||||||
| SV.70 up to 100 |
0,5 | |||||||||||||||||||||||||||
Table 9
Dimensions, mm
| Marking connection |
Structural elements | Welding method |
|
|
|
| |||||||||
| prepared edges of the welded parts | weld |
| |||||||||||||
| 179−136 | Nomin. | Pred. off. |
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||||
| U8 | InP SP |
6 up to 20 |
0,8 |
|
One | ±1 | 1 | ±1 | 1 | ±1 | 60 | ||||
| Pack | 6 up to 20 |
2 | +1 -2 |
45 | |||||||||||
| SV.20 up to 40 |
2 | +1 -2 | |||||||||||||
| SV.40 up to 80 |
0,7 |
2 | +1 -2 | ||||||||||||
| SV.80 up to 120 |
0,6 | ||||||||||||||
no more
,
Table 10
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
| |||||||||||||
| prepared edges of the welded parts | weld |
| |||||||||||||||
| 179−142 | 141−122 | 89−71 | 70−61 | SV. 90 | Up to 90 | Nomin. | Pred. off. |
Nomin. | Pred. off. | Nomin. | Pred. off. | ||||||
| U9 | InP SP |
From 3 to 10 |
0,8 |
|
30- |
30- |
1 | ±1 | 1 | ±1 | 1 | ±1,0 | 30 | ||||
| SV. 10 up to 20 |
- | ||||||||||||||||
| Pack | From 3 to 8 |
0,8 |
- | 0,8 |
- | 20- |
20- |
20 | |||||||||
| SV. 8 to 22 |
2 | +1 -2 |
2 | +1 -2 |
|||||||||||||
| SV. 22 up to 60 |
0,7 |
2 | +1 -2 | ||||||||||||||
Table 11
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
|
| |||||||||||||
| prepared edges of the welded parts | weld |
| ||||||||||||||||
| 179−142 | 141−122 | 89−71 | 70−61 | SV. 90 | Up to 90 | Nomin. | Pred. off. |
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||
| U10 | InP SP |
From 3 to 10 |
0,8 |
|
30- |
30- |
6 | 1 | ±1 | 1 | ±1 | 1 | ±1 | 30 | ||||
| SV. 10 up to 20 |
- | 8 | ||||||||||||||||
| Pack | From 3 to 8 |
0,8 |
- | 0,8 |
- | 20- |
20- |
6 | 20 | |||||||||
| SV. 8 to 22 |
8 |
2 | +1 -2 |
2 | +1 -2 |
|||||||||||||
| SV. 22 up to 60 |
0,7 |
10 | 2 | +1 -2 | ||||||||||||||
Table 12
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | SPO- sob svar- Ki |
|
|
|||||||||
| prepared edges of the welded parts | weld |
| |||||||||||
| 91−100 | 101−110 | 111−120 | 121−135 | 136−175 | 175−136 | 135−91 | Nomin. | Pred. off. | |||||
| T1 | InP SP Pack |
From 0.8 to 2.5 |
4 | 5 | 1,5±1,0 | 3 | 0 | +1,0 | |||||
| SV. 2.5 to 4.5 |
7 | ||||||||||||
| SV. 4,5 to 6.0 |
5 | 8 | |||||||||||
| SV. 6,0 to 10.0 |
6 | 0,4 |
0,6 |
0,9 |
1,1 | ||||||||
| SP Pack |
SV. 10,0 to 16.0 |
8 | +1,5 | ||||||||||
| SV. 16,0 to 20.0 |
9 | 5 | |||||||||||
| SV. Of 20.0 to 40.0 |
0,5 |
0,3 | |||||||||||
Table 13
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
|
|||||||||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||||||||
| 90−100 | 89−80 | 101−110 | 79−70 | 111−120 | 69−60 | 121−134 | 59−46 | 135 | 45 | ||||||||||
| T2 | InP SP Pack |
From 0.8 to 2.5 |
4 | 0,4 |
0,6 |
0,9 |
1,1 |
4 | 0 | +0,5 | 3 | ±2 | |||||||
| SV. Of 2.5 to 6.0 |
5 | 5 | +1,0 | 4 | |||||||||||||||
| SV. Of 6.0 to 10.0 | |||||||||||||||||||
| SP Pack |
SV. 10,0 to 16,0 |
6 | 6 | +2,0 | 5 | ||||||||||||||
| SV. 16,0 up to 20,0 |
8 | 8 | 6 | ||||||||||||||||
| SV. Of 20.0 to 24.0 |
0,5 |
10 | 7 | ||||||||||||||||
| SV. Of 24.0 to 30.0 |
8 | ||||||||||||||||||
| SV. 30,0−40,0 |
9 | ||||||||||||||||||
Table 14
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
|||||||||
| prepared edges of the welded parts | weld | nomin. | pred. off. | |||||||||
| ||||||||||||
| 89−45 | 91−135 | 89−45 | 91−135 | SV. 90 | Up to 90 | Nomin. | Pred. off. | |||||
| T5 | InP SP Pack |
From 0.8 to 2.5 |
2 | 3 | +1 |
|
90- |
0 | +0,5 | |||
| SV. 2.5 to 4.0 |
3 | 4 | +2 | +1,0 | ||||||||
| SV. 4,0 to 6.0 |
4 | 6 | +2 -1 | |||||||||
| SV. 6,0 to 10.0 |
5 | 7 | ||||||||||
| SP Pack |
SV. 10,0 to 15.0 |
6 | 8 | ±2 | +1,5 | |||||||
| SV. 15,0 to 21,0 |
7 | 9 | +2,0 | |||||||||
| SV. Size: 21.0 to 30.0 |
8 | 10 | ||||||||||
| SV. 30,0−40,0 |
9 | 12 | ||||||||||
Table 15
Dimensions, mm
| Designation of a compound | Structural elements | SPO- sob svar- Ki |
|
||||||||||
| prepared edges of the welded parts | weld | nomin. |
pred. off. | ||||||||||
| |||||||||||||
| 89−45 | 91−135 | 89−45 | 91−135 | SV. 90 | Up to 90 | Nomin. | Pred. off. | ||||||
| T6 | InP SP Pack |
From 0.8 to 2.5 |
2 | 3 | +1 |
|
90- |
0 | +0,5 | ||||
| SV. 2.5 to 4.0 |
3 | 4 | +2 | +1,0 | |||||||||
| SV. 4,0 to 6.0 |
4 | 5 | +2 -1 | ||||||||||
| SV. 6,0 to 10.0 |
5 | 6 | +1,5 | ||||||||||
| SP Pack |
SV. 10,0 to 15.0 |
6 | 7 | ||||||||||
| SV. 15,0 to 21,0 |
7 | 9 | ±2 | +2,0 | |||||||||
| SV. Size: 21.0 to 30.0 |
8 | 10 | |||||||||||
| SV. 30,0−40,0 |
12 | 15 | |||||||||||
Table 16
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
|
| |||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | ||||||
| 91−134 | ||||||||||||
| T3 | InP SP |
4 to 6 |
1,4 |
0 |
+1 | 1,5 |
+1,0 |
0,15 |
|
55 | ||
| SV. 6 to 10 |
1,3 |
+2 | ||||||||||
| Pack | 4 to 6 |
1,4 |
45 | |||||||||
| SV. 6 to 10 |
1,3 |
2,0 |
+1,0 To 2.0 | |||||||||
| SV. 10 to 14 | ||||||||||||
| SV. 14 to 18 | ||||||||||||
| SV. 18 to 22 | ||||||||||||
| SV. 22 up to 40 |
1,2 | |||||||||||
Table 17
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
|
| ||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||
| 91−134 | |||||||||||||
| T4 |
InP SP |
4 to 6 |
1,4 |
|
3 (reference) |
1 | +1 |
0,15 |
1,5 |
+1,0 |
55 | ||
| SV. 6 to 10 |
1,3 | ||||||||||||
| Pack |
4 to 6 |
1,4 |
3 |
+2 -1 |
45 | ||||||||
| SV. 6 to 10 |
1,3 |
2,0 |
+1,0 A 1.0 | ||||||||||
| SV. 10 to 14 | |||||||||||||
| SV. 14 to 18 | |||||||||||||
| SV. 18 to 22 | |||||||||||||
| SV. 22 up to 40 |
1,2 | ||||||||||||
Table 18
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements | Welding method |
| ||||||||||||||||||
| no more | grad | ||||||||||||||||||||
| prepared edges of the welded parts | weld |
|
Nomin. | Pred. off. | |||||||||||||||||
| 91−95 | 89−85 | 96−100 | 84−80 | 96−100 | 84−80 | SV. 90 | Up to 90 | ||||||||||||||
| T7 | InP SP |
6 to 8 |
0,7 |
0,7 |
|
|
|
|
|
3 | +2 -1 |
0,08 |
55 | ||||||||
| SV. 8 to 12 |
0,7 | ||||||||||||||||||||
| SV. 12 to 20 | |||||||||||||||||||||
| Pack | 6 up to 8 |
0,8 |
0,8 |
|
45 | ||||||||||||||||
| SV. 8 to 12 |
|||||||||||||||||||||
| SV. 12 to 18 |
0,7 |
0,7 |
| ||||||||||||||||||
| SV. 18 to 24 | |||||||||||||||||||||
| SV. 24 to 30 |
0,6 | ||||||||||||||||||||
| SV. 30 to 48 | |||||||||||||||||||||
| SV. 48 to 60 |
0,6 | ||||||||||||||||||||
Table 19
Dimensions, mm
| Refer to the inclusion of the United tion |
Structural elements |
Welding method |
| ||||||||||||||||||||
| no more |
grad | ||||||||||||||||||||||
| prepared edges of the welded parts | weld |
| |||||||||||||||||||||
| 101−105 | 79−75 | 106−110 | 74−70 | 101−105 | 79−75 | 106−110 | 74−70 | SV. 90 | Up to 90 | Nomin. | Pred. off. |
Nomin. | Pred. off. | ||||||||||
| T8 |
SP Pack |
From 12 to 22 |
0,8 |
0,6 |
|
1,2 |
|
|
|
|
2 |
±2 |
4 | ±2 |
45 | ||||||||
| SV. 22 to 34 |
1,3 |
6 | |||||||||||||||||||||
| SV. 34 to 46 |
8 | ||||||||||||||||||||||
| SV. 46 to 58 |
10 | ||||||||||||||||||||||
| SV. 58 to 76 |
12 | ||||||||||||||||||||||
| SV. 76 to 100 |
14 | ||||||||||||||||||||||
Table 20
Dimensions, mm
| Designation of a compound | Structural elements | Welding method |
|
| |||||||||||
| prepared edges of the welded parts | weld | grad | |||||||||||||
|
Nomin. | Pred. off. | Nomin. | Pred. off. | |||||||||||
| 91−105 |
89−75 | SV. 90 | Up to 90 | ||||||||||||
| T9 |
SP Pack |
From 18 to 40 |
0,7 |
(20±2)-( |
(20±2)+( |
(20±2)-(90- |
(20±2)+(90- |
0 |
+1 |
6 | ±2 |
45 | |||
| SV. 40 up to 50 |
0,6 |
7 | |||||||||||||
| SV. 50 to 100 |
8 | ||||||||||||||
5. For welded joints u7, U5, Y6, Y8, T7, T8, T9, performed welding in carbon dioxide allowed dulling =5±2 mm.
6. Welding parts of unequal thickness in the case of difference in thickness, not exceeding values specified in table.21, should be carried out as parts of the same thickness; the structural elements of prepared edges and weld sizes should choose larger thickness.
Table 21
mm
| The thickness of the thin parts |
The difference between the thicknesses of the parts |
| 2−3 |
1 |
| 4−30 |
2 |
| 32−40 |
4 |
| Over 40 |
6 |
If the difference in thickness of the welded parts more than the values specified in table.21 to the parts with greater thickness , should be made a chamfer on one or both sides to a thickness of the thin part at an angle of 15°, as indicated on the devil.1 and 2.
Damn.1
Damn.2
7. Dimensions of completed sutures at the site of overlap for closed connections and also in the places fixed by the jelly may differ from those prescribed by this standard. In this case, they should correspond to normative-technical documentation.
8. At a variable angle coupling parts , the seam is divided into sections. Each area of the coupling elements is performed in accordance with the requirements of this standard.
9. When carbon dioxide welding wire with diameter 0,8−1,4 mm is allowed to apply the basic types of welded joints and their structural elements according to GOST 11534−75.
