GOST 8951-75
GOST 8951−75 Connecting parts from malleable cast iron with cylindrical thread for pipelines. The crosses are straight. Main dimensions (with Amendments No. 1, 2)
GOST 8951−75
Group B61
INTERSTATE STANDARD
CONNECTING PARTS FROM MALLEABLE CAST IRON WITH CYLINDRICAL THREAD FOR PIPELINES.
CROSSES STRAIGHT
Basic dimensions
Ductile iron fittings with parallel thread for pipelines. Straight four-way junction pieces. 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 8951−59
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 the crosses shall be as specified in the drawing and in the table.
Standard is fully consistent with CT CMEA 3301−81.
Note. The drawing does not define the design of the cross.
Dimensions in mm
Conditional pass |
Thread |
Weight without cover, kg, not more* | ||
| The variant according to GOST 8944−75 | ||||
| 1 |
2 | |||
| 8 |
G |
21 | 0,083 | 0,089 |
| 10 |
G |
25 | 0,105 | 0,113 |
| 15 |
G |
28 | 0,163 | 0,179 |
| 20 |
G |
33 | 0,284 | 0,254 |
| 25 |
G 1 — |
38 | The 0.383 | 0,392 |
| 32 |
G 1 |
45 | 0,585 | 0,561 |
| 40 |
G 1 |
50 | 0,797 | 0,681 |
| 50 |
G 2 — |
58 | 1,251 | 1,117 |
| (65) |
G 2 |
69 | 1,769 | 1,587 |
| (80) |
G 3 — |
78 | 2,351 | 2,119 |
| (100) |
G 4 — B |
96 | 4,585 | 3,921 |
_______________
* For inquiries.
Notes:
1. The crosses 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
Direct cross uncoated with a 25 mm
Cross 25 GOST 8951−75
The same zinc-coating:
Cross C-25 GOST 8951−75
(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:
Compilation of national standards. -
M.: STANDARTINFORM, 2010
