GOST 8961-75
GOST 8957−75 Connecting parts from malleable cast iron with cylindrical thread for pipelines. Clutch transition. Main dimensions (with Amendments No. 1, 2)
GOST 8957−75
Group B61
INTERSTATE STANDARD
CONNECTING PARTS FROM MALLEABLE CAST IRON WITH CYLINDRICAL THREAD FOR PIPELINES. CLUTCH TRANSITION
Basic dimensions
Dictile iron fittings with parallel thread for pipelines. Transition sockets. Basic dimensions
ISS 23.040.60
Date of introduction 1977−01−01
The decision of the State standards Committee of the Council of Ministers of the USSR from
Limitation of actions taken by Protocol No. 2−92 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)
REPLACE GOST 8957−59
EDITION (September, 2010) with Changes No. 1, 2 approved in September 1980 and March 1983 (IUS sizes 11−80, 7 to 83)
1. The principal dimensions of couplings shall be as specified in the drawing and in the table.
Standard is fully consistent with CT CMEA 3303−81.
Drawing. The principal dimensions of couplings
Note. The drawing does not define the design of the clutch.
Dimensions in mm
Conditional pass |
Thread | The number of edges | Weight uncoated kg no more* | |||
| The variant according to GOST 8944−75 | ||||||
| 1 |
2 | |||||
| 10x8 |
G |
G |
30 | 2 | 0,040 | 0,041 |
| 15х8 |
G |
G |
36 | 2 | 0,061 | 0,065 |
| 15x10 |
G |
G |
36 | 2 | 0,064 | 0,068 |
| 20х8 |
G |
G |
39 | 2 | 0,081 | 0,084 |
| 20x10 |
G |
G |
39 | 2 | 0,086 | 0,091 |
| 20х15 |
G |
G |
39 | 2 | 0,095 | 0,105 |
| 25х10 |
G 1 — B | G |
45 | 4 | 0,122 | 0,129 |
| 25х15 |
G 1 — B | G |
45 | 4 | 0,134 | 0,144 |
| 25х20 |
G 1 — B | G |
45 | 4 | 0,147 | 0,155 |
| 32х10 |
G 1 |
G |
50 | 4 | 0,176 | 0,186 |
| 32х15 |
G 1 |
G |
50 | 4 | 0,185 | 0,200 |
| 32х20 |
G 1 |
G |
50 | 4 | 0,209 | 0,218 |
| 32х25 |
G 1 |
G 1 — | 50 | 4 | 0,218 | 0,234 |
| 40х15 |
G 1 |
G |
55 | 4 | 0,243 | 0,262 |
| 40х20 |
G 1 |
G |
55 | 4 | 0,258 | 0,276 |
| 40х25 |
G 1 |
G 1 — B | 55 | 4 | 0,280 | 0,298 |
| 40х32 |
G 1 |
G 1 |
55 | 4 | 0,325 | 0,324 |
| 50х15 |
G-2 — B | G |
65 | 6 | 0,402 | 0,422 |
| 50х20 |
G-2 — B | G |
65 | 6 | 0,411 | 0,428 |
| 50х25 |
G-2 — B | G 1 — B | 65 | 6 | 0,416 | 0,446 |
| 50х32 |
G-2 — B | G 1 |
65 | 6 | 0,447 | 0,476 |
| 50x40 |
G-2 — B | G 1 |
65 | 6 | 0,473 | 0,500 |
| (65х32) |
G 2 |
G 1 |
74 | 6 | 0,656 | 0,580 |
| (65х40) |
G 2 |
G 1 |
74 | 6 | 0,679 | 0,600 |
| (65х50) |
G 2 |
G-2 — B | 74 | 6 | 0,740 | 0,650 |
| (80 x 40) |
G 3 — B | G 1 |
80 | 6 | 0,844 | 0.750 in |
| (80x50) |
G 3 — | G-2 — B | 80 | 6 | 0,903 | 0,800 |
| (80х65) |
G 3 — | G-2 |
80 | 6 | 0,970 | 0,855 |
| (100x50) |
G 4 — IN | G-2 — B | 94 | 6 | 1,572 | 1,365 |
| (100х65) |
G 4 — IN | G 2 |
94 | 6 | 1,677 | 1,440 |
| (100х80) |
G 4 — IN | G 3 — | 94 | 6 | 1,778 | 1,530 |
_______________
* For inquiries.
Notes:
1. The coupling shown in the table in brackets is not recommended.
2. Weight of galvanized fittings should not exceed the weight non more than 5%.
Examples of symbols
Adapter coupling without cover with 32 mm at
25 mm:
Clutch 32х25 GOST 8957−75
The same zinc-coating:
Coupler C-32х25 GOST 8957−75
(Changed edition, Rev. N 1, 2).
2. The constructive dimensions and technical requirements — GOST 8944−75.
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Pipes of metal and connecting
parts to them. Part 4. Pipe black
metals and alloys cast and connective
parts to them. The basic dimensions. Methods
technological tests of tubes:
SB. Standards. — M.: STANDARTINFORM, 2010
