HG/T 20519.32-1992 Legend of Pipes, Fittings, Valves and Pipeline Accessories in Pipeline and Instrumentation Flowcharts HG/T20519.32-1992 Standard Download Decompression Password: www.bzxz.net

Pipes in Pipeline and Instrumentation Flowcharts
Fittings, Valves and Pipeline Accessories
HG20519.32-92
Legends of Pipes, Pipe Fittings, Valves and Pipeline Accessories in Pipeline and Instrumentation Flowcharts
HG20519.32-92
This regulation is only applicable to the drawing of pipeline and instrumentation flow charts in chemical process design and construction drawings. 2Legends not listed in this regulation can be solved by the following methods. (1) Simplify the appearance and features of the actual object and compile a new legend. (2) When necessary, use a rectangular frame (or square frame) and add appropriate text descriptions to represent it. The line regulations shall be implemented in accordance with HG20519.28-92. The dimensions of the valve legend are generally 6mm long and 3mm wide or 8mm long and 4mm wide. Name
Material pipeline
Material pipeline
Lead wire, equipment, pipe fittings,
Valves, instruments, etc. Legend
Original pipeline
Removable short pipe
Heating (ling) pipeline
Electric heating pipeline
Thick solid line
Medium thick line
Thin solid line
The width of the pipeline is the same as the width of the new pipeline connected to it
Jacket pipe
Pipeline insulation layer
Fin tubewww.bzxz.net
Flexible pipe
Pipeline connected
Pipeline crossing (not connected)
Pipeline grade, pipeline number boundary
Guoran Fanguo boundary
Insulation layer boundary
Accompanying pipe boundary
Flow direction arrow
Drawing connection mark of pipelines or instrument signal lines entering and exiting the device or main item, the corresponding drawing number
fill in the hollow arrow
Drawing connection mark of pipelines or instrument signal lines in the same device or main item, the corresponding drawing number
fill in the hollow arrow
The serial number of the drawing number
should be filled in the hollow arrow
7777777777
×××x
XXXXXXX×
Only used for drawing underground and semi-underground equipment
XX×X represents the pipeline number or pipeline grade
WE is supplied as a complete set with the equipment
BB is the responsibility of the buyer, BV is the responsibility of the manufacturer; BS is the responsibility of the seller: BI instrument professional is responsible for the insulation layer boundary line identification letter "x" is the same as the medullary thermal layer function type code
The identification letter "x\" of the accompanying pipe boundary line is the same as the The function type code of the accompanying pipe is the same
Dimension unit, mm
Indicate the equipment position number, pipeline number or instrument position number above the hollow arrow
Dimension unit, mm
Indicate the equipment position number, pipeline number or instrument position number of the hollow arrow
Special pipe (valve)
Parts number box
Stop valve
Throttle valve
Plug valve
Diaphragm valve
Angle stop valve
Angle throttle valve
Angle ball valve|| tt||Three-way stop valve
Three-way ball valve
Three-way plug valve
Four-way check valve
Four-way ball valve
Four-way plug valve
A dare to model 3V lucky new door
SP, special pipe diameter i0mm
Lift check valve
Swing positive return valve
Pressure reducing valve
Angle spring safety valve
Angle heavy hammer safety valve
Sulfur-dispersing water valve
Direct flow check valve
Breathing valve
Flame arrester|| tt||Sight glass, sight clock
Silencer
Silencer
Flow limiting orifice
Burst disc
(Multi-plate)
(Single plate)
Min outlet pipe is Shuizi River Merchant
Valve outlet pipe is horizontal
In the pipeline
Enlarge the gas
Four diameters 10m
Ejector
Venturi tube
Y-type filter
Cone filter
T-type filter
Canister (basket) filter||t t||Pipe mixer
Expansion joint
Spray pipe
Welding connection
Threaded pipe cap
Flange connection
Hose connector
Blind plate at pipe end
Flange at pipe end (cover)
Square box 5mm×5mm
Square box 5mm×5mm
Square box 5mm×5mm
Only used to indicate that the pipe mouth of the equipment and the pipeline are welded
Concentric reducer
Eccentric reducer
Round plate
8 Blind plate
Vent cap (tube)
Safety shower
Eyewash
(bottom flat)
(normal open)
<normal closed)
(cap)
(proud mouth)
(top flat)
(normal closed)
(normal open)
(tube)
(closed)
Do not close without approval
(locked or sealed)
Do not open without approval
(locked or sealed)
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