HG/T 20519.33-1992 Legend for pipes, fittings, valves and special pipe parts on piping layout and axonometric drawings HG/T20519.33-1992 Standard download decompression password: www.bzxz.net

Pipes, fittings, valves and pipes on the piping layout and axonometric drawings
Legend of special parts
HG20519.33-92
On-site welding
Heating pipe (dotted line)
Jacketed pipe (example)
Underground pipelines
Legend of pipes, fittings, valves and pipes on the piping layout and axonometric drawings
H G20519.33-92
Pipeline layout
(When drawing a single drawing with above-ground pipelines)
Rising diameter flange
Concentric reducer
(Example)
Threaded, socket welded,
Connected with threaded, socket welded or
slip-on flange
Connected with butt-weld flange
Threaded or socket welded
C.R4O× 25
C.RaOx so
C. R80X 50
Axonometric drawing
CR40xS4
Threaded or socket weld
Butt weld connection
Flange connection
Threaded or socket weld
Butt weld connection
Flange connectionwww.bzxz.net
E.R25×20
Pipeline layout
E.R25×20
E.R25×20
E. R80X s0
E.R80×50
FOB(FOT)
E-R80×S0
FOB(FOT)
E.R80×50
Axonometric drawing
E.R25×20s
E. R80 × 50
Butt connection
Flange connection
Miter elbow
(Example)
Threaded or socket weld
Butt weld connection
Flange connection
Threaded or socket weld
Butt weld connection
Flange connection
Pipe layout
(Only for small angle miter bend)
Axonometric drawing
Welded Ai pipe
Half-pipe replacement
Change to branch pipe platform
Without reinforcement plate
With reinforcement plate
Threaded or socket welding connection
Butt welding connection
Threaded or socket welding
Butt welding connection
Flange connection
Threaded or socket welding connection
Butt welding connection
Flange connection
Threaded connection
Threaded or socket welding connection Welded pipe joint
Threaded or socket welding union
Dry pipe
[For half pipe joint branch and sub-branch)oIT
Hose joint
Quick connector
Threaded or socket welding connection
Butt welding connection
Stop valve
Throttle valve
"y\ type valve
Three-way ball valve
Plug valve
( COCK and PLUG)
Pipeline layout
Views of pipeline layout
Axis diagram
Plug valve
Three-way valve
Wafer type
Flange type
Plunger valve
Positive return valve
Cut-off type
Check valve
Diaphragm valve
Drain valve
Clamping type| |tt||Hose valve
Views of the pipeline layout
Axonometric drawing
Jacketed valve
Water-discharging valve
Pressure reducing valve
Spring type
Safety valve
Double spring type
Safety valve
Lever type
Safety gate
Stop valve
Views of the pipeline layout||tt| |Non-flange end connection
Threaded or socket-welded connection
Axonometric drawing
Butt-welded connection
Lever length
Should be based on the ratio of the actual
size
Electric
Pneumatic
Hydraulic or pneumatic
Spur gear I
Pulley type
Lever (for floor)
Ordinary manual
Gear Type
Sprocket valve
Transmission structure
Pipeline layout diagram various views
Axonometric drawing
1. Transmission structure
Type
Suitable
Various types
Type
2. Transmission structure
Should be
The
size ratio
of the
actual object
To avoid
with the
3. Dotted lines indicate variable parts, bellows expansion joints, spherical compensators, stuffing box compensators, bursting discs, welded type, flow limiting orifice plates, clamped type, plug plates and gaskets, 8-shaped blind plates, flame arresters, and drain rings.
Pipeline layout
Funnel method with cover
Glass tube type
Sight glass drawing method
It can also be expressed according to the
rotation angle during installation
Normal passage
Normal cut-off
Temporary coarse filter
Y-type coarse filter
T-type coarse filter
Eyewash and shower
Note: 1.CR——concentric reducer,
ER ——Eccentric reducer,
FOB————Flat bottom,
Flat top:
2. Other undrawn views are represented according to the projection: 3. Dotted lines represent variable parts:
Pipeline layout and drawing
(for plane)
Elevation drawing is drawn according to the simplified outline
4. The legends of the axonometric drawing are all examples, and can be represented accordingly according to the actual pipeline direction. 5. Muffler and other special parts not specified can be represented according to the simplified outline. 185
Axonometric drawing
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