5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be made as a fraction, the numerator of which indicates the designation of the welding method of the root of the seam, and the denominator indicates the designation of the main welding method.
6. For welded joints C12, C21, C23, C24, U7, U10, T7, having parts thickness s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= 5 ± 2 mm.
Crap. 2.
Crap. 3.
8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during 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. The maximum deviations of the leg size of fillet welds from the nominal value are given in.
9. (Deleted, Amendment No. 1).
10. (Deleted, Amendment No. 3).
11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg K p(Fig. 4), installed during design.
Crap. 4 .
Note: Cathetus TO nis the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TO nany of the equal legs is accepted, with an asymmetrical seam - the smaller one.
(Changed edition, Amendment No. 3).
12. Before welding, the displacement of the edges relative to each other is allowed no more than:
0,2s mm - for parts up to 4 mm thick;
0,1s+ 0.5 mm - for parts with a thickness of 5 - 25 mm;
3 mm - for parts with a thickness of 25 - 50 mm;
0,04s+ 1.0 mm - for parts with a thickness of 50 - 100 mm;
0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.
14. The minimum values of fillet weld legs are given in.
15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values given in.
16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values given in the recommended one.
14 - 16. (Introduced additionally, Amendment No. 1).
17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .
18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.
19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .
17 - 19. (Introduced additionally, Amendment No. 3).
mm
|
Yield strength of welded steel, MPa |
Minimum fillet weld leg for the thickness of the thicker element being welded |
|||||||
|
from 3 up to 4 |
St. 4 up 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 |
||||||||
Note . The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.
mm
|
Fillet weld legs for welding methods |
|||||
|
Manual arc |
In carbon dioxide, use Sv-08G2S wire with a diameter of 1.4 to 2.0 mm instead of type electrodes |
In carbon dioxide, use Sv-08G2S wire with a diameter of 0.8 to 1.2 mm instead of type electrodes |
|||
|
E42A and E42 |
E46A and E46 |
E50A and E50 |
E42A and E42 |
E46A and E46 |
|
Note . The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.
(Introduced additionally, Amendment No. 1).
mm
|
Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength of the base metal |
||||
|
St. 5 to 8 inclusive. |
||||
|
St. 8 to 12 incl. |
||||
|
St. 12 |
||||
(Introduced additionally, Amendment No. 3).
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the research and production association TsNIITMASH.
PERFORMERS
M. M. Borisenko(topic leader); V. D. Khodakov; E. G. Starchenko.
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 28, 1976 No. 1826.
3. The inspection period is 1990. The inspection frequency is 5 years.
4. Standard meetsTGL 14905/03 regarding the form and content of tables of welded joints.
5. INSTEAD GOST 14771-69.
6. REFERENCED REGULATIVE AND TECHNICAL DOCUMENTS.
7. REISSUE with Amendments No. 1, 2, 3, approved in March 1982, December 1986, January 1989 (IUS 6-82, 3-87, 4-89).
5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be made as a fraction, the numerator of which indicates the designation of the welding method of the root of the seam, and the denominator indicates the designation of the main welding method.
6. For welded joints C12, C21, C23, C24, U7, U10, T7, having parts thickness s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= 5 ± 2 mm.
Table 48
7. Butt welding of parts of unequal thickness in the case of a difference in thickness not exceeding the values indicated in the table. 48, 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 their greater thickness.
To achieve a smooth transition from one part to another, an inclined position of the seam surface is allowed (Fig. 1).
If the difference in the thickness of the parts being welded exceeds the values indicated in the table. 48, on a part with a large thickness s 1 a bevel should be made on one or both sides to the thickness of the thin part s, as indicated in the devil. 2 and 3. In this case, the structural elements of the prepared edges and the dimensions of the weld should be selected according to the smaller thickness.
8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during 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. The maximum deviations of the fillet weld leg size from the nominal value are given in Appendix 4.
9. (Deleted, Amendment No. 1).
10. (Deleted, Amendment No. 3).
11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg K p(Fig. 4), installed during design.
Note. Cathetus TOn is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TOn any of the equal legs is accepted, with an asymmetrical seam - the smaller one.
(Changed edition, Amendment No. 3).
12. Before welding, the displacement of the edges relative to each other is allowed no more than:
0,2s mm - for parts up to 4 mm thick;
0,1s+ 0.5 mm - for parts with a thickness of 5 - 25 mm;
3 mm - for parts with a thickness of 25 - 50 mm;
0,04s+ 1.0 mm - for parts with a thickness of 50 - 100 mm;
0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.
13. When welding in carbon dioxide with electrode wire with a diameter of 0.8 - 1.4 mm, it is allowed to use the main types of welded joints and their structural elements in accordance with GOST 5264-80.
14. The minimum values of fillet weld legs are given in Appendix 1.
15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values given in Appendix 2.
16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values given in recommended Appendix 3.
14 - 16.
17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .
18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.
19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .
17 - 19. (Introduced additionally, Amendment No. 3).
|
Yield strength of welded steel, MPa |
Minimum fillet weld leg for the thickness of the thicker element being welded |
|||||||
|
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 minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.
|
Fillet weld legs for welding methods |
|||||
|
Manual arc |
In carbon dioxide, use Sv-08G2S wire with a diameter of 1.4 to 2.0 mm instead of type electrodes |
In carbon dioxide, use Sv-08G2S wire with a diameter of 0.8 to 1.2 mm instead of type electrodes |
|||
Note. The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.
|
Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength of the base metal |
||||
APPENDICES 1-3.(Introduced additionally, Amendment No. 1).
APPENDIX 4.(Introduced additionally, Amendment No. 3).
This standard establishes the basic types, structural elements and dimensions of welded joints made of steels, as well as alloys on iron-nickel and nickel bases, performed by gas-shielded arc welding.
The standard does not establish the main types, structural elements and dimensions of welded joints of steel pipelines in accordance with GOST 16037-80
| Title of the document: | GOST 14771-76 |
| Document type: | standard |
| Document status: | active |
| Russian name: | Gas shielded arc welding. Welded connections. Main types, structural elements and dimensions |
| English name: | Gas-shielded arc welding. Welded joints. Main types, design elements and dimensions |
| Date of text update: | 01.08.2013 |
| Date of introduction: | 30.06.1977 |
| Description update date: | 01.08.2013 |
| Number of pages in the main text of the document: | 39 pcs. |
| Instead: | GOST 14771-69 |
| Publication date: | 01.12.2006 |
| Reissue: | reissue with changes 1 |
| Last modified date: | 22.05.2013 |
| Amendments and changes: | Change No. 1 to GOST 14771-76 (1982-08-01) - “Validity period extended” Change No. 2 to GOST 14771-76 (1987-07-01) - “Validity period extended” Change No. 3 to GOST 14771-76 (1989-03-01) - “Validity period extended” |
| Is located in: | OKS All-Russian classifier of standards 25 MECHANICAL ENGINEERING (This area includes general purpose standards) 25.160 Welding, brazing and soldering (Including gas welding, electric welding, plasma welding, electron beam welding, plasma cutting, etc.) 25.160.40 Welds and welding (Including weld position and mechanical non-destructive testing of welded joints) |
                                       |
|
5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be made as a fraction, the numerator of which indicates the designation of the welding method of the root of the seam, and the denominator indicates the designation of the main welding method.
6. For welded joints C12, C21, C23, C24, U7, U10, T7, having parts thickness s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= 5 ± 2 mm.
Table 48
mm
Thickness of thin part | Part thickness difference |
4-30 | |
32-40 | |
St. 40 |
7. Butt welding of parts of unequal thickness in the case of a difference in thickness not exceeding the values indicated in the table. 48, 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 their greater thickness.
To achieve a smooth transition from one part to another, an inclined position of the seam surface is allowed (Fig. 1).
If the difference in the thickness of the parts being welded exceeds the values indicated in the table. 48, on a part with a large thickness s 1 a bevel should be made on one or both sides to the thickness of the thin part s, as indicated in the devil. 2 and 3. In this case, the structural elements of the prepared edges and the dimensions of the weld should be selected according to the smaller thickness.
8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during 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. The maximum deviations of the fillet weld leg size from the nominal value are given in Appendix 4.
9. (Deleted, Amendment No. 1).
10. (Deleted, Amendment No. 3).
11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg K p(Fig. 4), installed during design.
Crap. 4.
Note: Cathetus TO nis the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TO nany of the equal legs is accepted, with an asymmetrical seam the smaller one.
(Changed edition, Amendment No. 3).
12. Before welding, the displacement of the edges relative to each other is allowed no more than:
0,2s mm - for parts up to 4 mm thick;
0,1s+ 0.5 mm - for parts with a thickness of 5-25 mm;
3 mm - for parts with a thickness of 25-50 mm;
0,04s+ 1.0 mm - for parts with a thickness of 50-100 mm;
0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.
13. When welding in carbon dioxide with electrode wire with a diameter of 0.8-1.4 mm, it is allowed to use the main types of welded joints and their structural elements in accordance with GOST 5264-80.
14. The minimum values of fillet weld legs are given in Appendix 1.
15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values given in Appendix 2.
16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values given in recommended Appendix 3.
14-16. (Introduced additionally, Amendment No. 1).
17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .
18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.
19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .
17-19. (Introduced additionally, Amendment No. 3).
mm
Yield strength of welded steel, MPa | Minimum fillet weld leg for the thickness of the thicker element being welded |
|||||||
from 3 up to 4 | St. 4 up 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 | ||||||||
Note . The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.
mm
Fillet weld leg for welding methods |
|||||
Manual arc | In carbon dioxide, use Sv-08G2S wire with a diameter of 1.4 to 2.0 mm instead of type electrodes | In carbon dioxide, use Sv-08G2S wire with a diameter of 0.8 to 1.2 mm instead of type electrodes |
|||
E42A and E42 | E46A and E46 | E50A and E50 | E42A and E42 | E46A and E46 |
|
Note . The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.
(Introduced additionally, Amendment No. 1).
mm
Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength of the base metal |
||||
(Introduced additionally, Amendment No. 1).
mm
Nominal size of fillet weld leg | Maximum deviations of the fillet weld leg size of the nominal value |
Up to 5 incl. | |
St. 5 to 8 inclusive. | |
St. 8 to 12 incl. | |
St. 12 |
(Introduced additionally, Amendment No. 3).
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the research and production association TsNIITMASH.
PERFORMERS
M. M. Borisenko(topic leader); V. D. Khodakov; E. G. Starchenko.
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the State Committee of Standards of the Council of Ministers of the USSR dated July 28, 1976 No. 1826.
3. The inspection period is 1990. The inspection frequency is 5 years.
4. Standard meetsTGL 14905/03 regarding the form and content of tables of welded joints.
5. INSTEAD GOST 14771-69.
6. REFERENCED REGULATIVE AND TECHNICAL DOCUMENTS.
7. REISSUE with Amendments No. 1, 2, 3, approved in March 1982, December 1986, January 1989 (IUS 6-82, 3-87, 4-89).
5. When making the root of a multilayer weld using a welding method different from the main method by which the edges are filled, the values of the structural elements of the welded joint must be selected according to the main welding method. In this case, the designation of the welding method should be carried out as a fraction, the numerator of which indicates the designation of the method of welding the root of the seam, and the denominator indicates the designation of the main welding method.
6. For welded joints C12, C21, C23, C24, U7, U10, T7, having parts thickness s= 12 mm or more, as well as for connections C15, C16, C25, C27, U8, T8, having the thickness of the parts s= 20 mm or more, performed using the UP welding method, blunting is allowed With= (5 ± 2) mm.
mm
7. Butt welding of parts of unequal thickness in the case of a difference in thickness not exceeding the values indicated in the table. , 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 their greater thickness.
To achieve a smooth transition from one part to another, an inclined position of the seam surface is allowed (Fig.).
If the difference in the thickness of the parts being welded exceeds the values indicated in the table. , on a part with a large thickness s 1 a bevel should be made on one or both sides to the thickness of the thin part s, as indicated in the devil. And . In this case, the structural elements of the prepared edges and the dimensions of the weld should be selected based on their smaller thickness.
8. Size and maximum deviations of fillet weld leg TO And K 1 must be installed during 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. The maximum deviations of the leg size of fillet welds from the nominal value are given in the Appendix.
9. (Deleted, Amendment No. 1).
10. (Deleted, Amendment No. 3).
11. Convexity or concavity of a fillet weld is allowed up to 30% of its leg, but not more than 3 mm. In this case, concavity should not lead to a decrease in the value of the leg TO n (drawing) installed during design.
Note . Cathetus TO n is the leg of the largest right triangle inscribed in the outer part of the fillet weld. With a symmetrical seam behind the leg TO n any of the equal legs is accepted, with an asymmetrical seam - the smaller one.
(Changed edition, Amendment No. 3).
12. Before welding, the displacement of the edges relative to each other is allowed no more than:
0,2s mm - for parts up to 4 mm thick;
0,1s+ 0.5 mm - for parts with a thickness of 5 - 25 mm;
3 mm - for parts with a thickness of 25 - 50 mm;
0,04s+ 1.0 mm - for parts with a thickness of 50 - 100 mm;
0,01s+ 4.0 mm, but not more than 6 mm - for parts with a thickness of more than 100 mm.
14. The minimum values of fillet weld legs are given in the Appendix.
15. When using carbon dioxide welding instead of manual arc welding, the leg of the design fillet weld can be reduced to the values given in the Appendix.
16. When welding in carbon dioxide with an electrode wire, which ensures the production of weld metal with a higher tensile strength than that of the base metal, the leg of the design fillet weld can be reduced to the values given in the Appendix.
14 - 16. (Introduced additionally, Amendment No. 1).
17. In butt, tee and corner joints with a thickness of more than 16 mm, made under installation conditions, it is allowed to increase the nominal value of the size b up to 4 mm. In this case, the seam width can be increased accordingly e, e 1 .
18. In places where welds overlap and where defects are corrected, it is allowed to increase the size of welds up to 30% of the nominal value.
19. When preparing edges using hand tools, the maximum deviations of the edge bevel angle can be increased to ± 5°. In this case, the seam width can be changed accordingly e, e 1 .
17 - 19. (Introduced additionally, Amendment No. 3).
|
Yield strength of welded steel, MPa |
Minimum fillet weld leg for the thickness of the thicker element being welded |
|||||||
|
from 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 |
||||||||
Note . The minimum value of the leg should not exceed 1.2 times the thickness of the thinner element.
|
Fillet weld leg for welding methods |
|||||
|
Manual arc |
In carbon dioxide, use Sv-08G2S wire with a diameter of 1.4 to 2.0 mm instead of type electrodes |
In carbon dioxide, use Sv-08G2S wire with a diameter of 0.8 to 1.2 mm instead of type electrodes |
|||
|
E42A and E42 |
E46A and E46 |
E50A and E50 |
E42A and E42 |
E46A and E46 |
|
Note . The given data does not apply to connections made when welding with an extended electrode extension or with direct current polarity.
|
Fillet weld leg for the ratio of the tensile strength of the weld metal to the tensile strength of the base metal |
||||
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