Interstate standards

Unified system of Design documentation

Symbols conditional graphic

Pipeline fittings

Based on GOST 2.785-96. This page is not the original document. Translation may be inaccurate.

Interstate Council for Standardization, Metrology and Certification

1. This standard establishes conditional graphic symbols for pipeline fittings in the schemes and drawings of all industries and construction.

The standard does not apply to hydraulic and pneumatic drives and products of the main production of aviation equipment.

2. The dimensions of the designations are not established by the standard.

3. The designations of the valve, depending on the type of connection and the type of control, are performed on the basis of a combination of the designations of this standard and the designations established by the relevant standards of the Unified System of Design Documentation.

Name	Designation
SYMBOL DEFINITION OF GENERAL PURPOSE FITTINGS
1. Shut-off valve:
a) pass-through
b) angular
2. Three-way valve
3. Regulating valve:
a) pass-through
b) angular
4. Check valve:
a) pass-through
b) angular The movement of the working substunce through the valve must be directed from the white triangle to the black one
5. Safety valve:
a) pass-through
b) angular
6. Throttle valve
7. Reducing valve Note. The vertex of the triangle should be directed towards the increased pressure
8. Automatic air valve (plunger)
9. Gate valve
10. Shutter rotary
11. Crane:
a) pass-through
b) angular
12. Three-way crane:
a) general designation
b) with T-plug
c) with L-shaped stopper
13. Four-way crane
14. End crane:	Full	Simplified
a) general designation
b) tap
c) self-locking, for washbasin
d) toilet washbasin
e) bath
f) urinal
j) contact flush
i) laboratory
k) fire valve
for connection of one hose
for connection of two hoses
l) watering
15. Double adjustment crane Note. Simplified designation is allowed only in the documentation for construction
16. Mixer
a) general designation
b) with swivel spout
c) with shower mesh
d) with self-locking washbasin faucet
e) medical ulnar
DESIGNATIONS OF FITTINGS, APPLIED MAINLY IN THE DOCUMENTATION FOR SHIPBUILDING
17. Valve non-return-lock:
a) pass-through
b) angular Note. The movement of the working medium through the valve must be directed from the white triangle to the black one
18. Valve non-return-controlled
19. Self-locking valve
20. Fast-acting shutoff valve:
a) for opening
b) for closing
21. Starting valve
22. Double-seat valve
23. Valve to the pressure gauge
24. Safety warning valve
25. Flapper:
a) without forced closure
b) with forced closure
26. Overflow gate valve (for ships)
27. Flushing valve
28. Three-valve box:
a) lockable
b) non-return-lockable
c) non-return-controlled Note. The number of squares in the designation should correspond to the number of valves in the box
29. Three-way manipulator Note. The number of rames in the designation must correspond to the number of moves of the manipulator.
Note. The names in parentheses correspond to the terminology accepted in the shipbuilding industry.

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