This standard specifies the graphic symbols and text codes for the flow chart of air separation equipment. This standard is applicable to the drawing of flow charts, system diagrams and the preparation of technical documents for air separation equipment. It can be used as a reference for drawing flow charts and the preparation of technical documents for other gas separation, liquefaction and extraction equipment. JB/T 7672-1995 Graphic symbols and text codes for flow charts of air separation equipment JB/T7672-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 7672-95
Flowchart of air separation equipment
Graphic symbols and text codes
Issued on June 16, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1996
Subject content and scope of application
Cited standards
General provisions
Graphic symbols for equipment and machine systems
Text codes for equipment and machine systems
Numbering of pipelines and valves·
Codes for control points of measuring panels
Graphic symbols for measurement and control systems
Mechanical Industry Standard of the People's Republic of China
Flowchart of air separation equipment
Graphic symbols and text codes
1 Subject content and scope of application
This standard specifies the graphic symbols and text codes for flow charts of air separation equipment. JB/T7672-95
ZBJ76007-88
This standard is applicable to the drawing of flow charts, system diagrams and technical documents of air separation equipment. It can be used as a reference for drawing flow charts and technical documents of other gas separation, liquefaction and extraction equipment. 2 Reference standards
GB4457.4 Mechanical drawing lines
GB4458.4 Mechanical drawing
Note method
GB6567.2 Graphic symbols of pipeline systems Pipeline GB6567.4 Graphic symbols of pipeline systems
Valves and control elements
3 General provisions
3.1 The graphic symbols in this standard are generally drawn with thick solid lines. The line width 6 should comply with the provisions of GB4457.4. For pipelines, pipe fittings, valves and measurement and control components, it is allowed to draw with thin solid lines (line width of about 6/3). On the same drawing, the types and widths of various graphic lines of graphic symbols should be consistent.
3.2 Text codes should be written in straight font. The stroke width is about one-tenth of the font height. Graphic symbols are allowed to be combined. Positions are allowed to be rotated. 3.3
When drawing graphic symbols, they can be enlarged or reduced in proportion according to the legend shown in this standard. 3.5
Parts not specified in this standard should be drawn in accordance with the national standard "Mechanical Drawing". Under the condition that it does not violate this standard, each unit may make supplementary provisions. 3.63
Graphic symbols for equipment and machine systems
4.1 Distillation tower
Sieve plate tower
Approved by the Ministry of Machinery Industry on June 16, 1995
Graphic symbols
Including sieve plate distillation towers for heat and mass transfer such as convection plates, circulating plates, and S-shaped plates||tt| |1996-07-01Implementation
Packed tower
Tube condenser
Evaporator
Plate-fin condenser
Condenser evaporator
4.2 Heat exchange equipment
Multi-stream
Heat exchanger
Two-stream
Heat exchanger
Three-stream
Heat exchanger
JB/T 7672-95
Graphic symbols
Graphic symbols
Including tubular condensers and evaporators with boiling between tubes and cooling inside tubes filled with various types of fillers
Condensers and evaporators of plate-fin heat exchangers, including condensers and evaporators composed of multiple plate-fin heat exchanger units
Heat exchangers for heat exchange between multiple fluids, including switching heat exchangers or main heat exchangers
Including flow, parallel flow or cross flow heat exchangers||t t||Including counter-current, parallel or cross-current heat exchangers
Liquidiser
Shell and tubewww.bzxz.net
Heat exchanger
Wrap-around
Heat exchanger
Fin tube
Heat exchanger
Tube evaporator
4.3 Air precooling system
Spray air
Air cooling tower
Tray air
Air cooling tower
JB/T 7672--95
Graphic symbols
Including countercurrent, parallel or cross-current liquefiers Shell and tube heat exchangers for heat exchange between hot and cold fluids Wrap-around heat exchangers for heat exchange between two or more streams
Flat-type heat exchangers for heat exchange by natural convection Tube evaporators for vaporizing low-temperature liquid in the tubes by natural convection
Direct contact cooling towers
Through-flow plate cooling towers
Packed air cooling tower
Mixed air cooling tower
Tray type
Water cooling tower
Packed type
Water cooling tower
4.4 Containers and other equipment
Dryer, absorption
Attachment, pure
Horizontal purifier
JB/T76729S
Graphic symbol
Filling Cooling towers with various fillers
Water cooling towers that cool the air with low-temperature water and normal-temperature water at the same time
Open cooling tower
A--Filled tower with exhaust fan
B---Filled tower without exhaust fan
The device is filled with molecular sieves, silica gel or miscellaneous gel to remove moisture, carbon dioxide and hydrocarbons in the air and purify gas impurities
The device is filled with molecular sieves to remove moisture, carbon dioxide and hydrocarbons in the air and purify gas impurities Carbon dioxide and hydrocarbons
Gas-liquid separator
Water cooler
Water bath
Vaporizer
Water sealer
Electric heater and
Steam heater
-Flame arrester
Automatic reading box
Catalyst furnace
JB/T7672-95
Graphic symbol
Electric by electric
Gas-liquid separator
Heat exchanger for cooling gas with water
Cryogenic liquid is heated and vaporized by water in the tube
Gas is sealed by water column pressure
Electric heater for heating gas and steam heating flame blocking equipment
Automatic switching by air flow pressure difference to change air flow direction
Built-in catalyst to remove certain gas or impurities in mixed gas by catalytic reaction
Belt
Filter
Mounted filter
Filter
Muffler
Muffler pit
Liquid oxygen injection
Evaporator
Ejector
Regenerator
Filler
JB/T7672-95
Graphic symbols
Large filters for various air compressors Large filters for various air compressors are installed in Small filter used before the expansion machine or on the pipeline
Silencer for gas effect
Silencer installed on the underground tunnel surface
A small amount of liquid oxygen is mixed with the oxygen flow through the ejector and evaporated
Use steam or air to vaporize the discharged low-temperature liquid
Use to store heat
Full filler for filling bottles of various gas products
4.5 Description and storage tank
4.6 Machine| |tt||Gas storage tanks and
Buffers
Cryogenic liquid
Body storage tanks
Cryogenic liquid
Body tank cars
Large cryogenic
Liquid tanks
Wet gas storage cabinets
Electric motors
Generators
Centrifugal low
temperature liquid pumps
Plunger low
temperature liquid tickets
JB/T 7672—95
Graphic symbols
Graphic symbols
Containers for storage and buffering of gases
Vacuum insulated containers for storing cryogenic liquids
Mobile vacuum insulated containers for storing cryogenic liquidsLarge cryogenic liquid containers using ordinary insulation of powdersContainers for storing gases
Including synchronous or asynchronous and micro AC and DC motor brake turbine expanders
Liquid enters from the open end and exits from the closed end
Liquid enters from the open end and exits from the closed end
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