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ResourcesP&ID symbols

A jacketed batch reactor line with cascade temperature control, in one drawing

Feed tank, pump, filter and flow control, the jacketed reactor with its heat exchanger loop and cascade temperature control, rupture disc and safety valve, vent scrubber and vacuum pump, and the discharge to a centrifuge and dryer: equipment and piping parts from the Pro palette, placed and tagged on one sheet.

Free to use and modify in your own projects, including commercial ones. The ZIP holds the sample drawing, a template, a plot style table and a README; no add-in needed. The data in the drawing is made up, so it is not for design or construction. Provided as is, without warranty. Library terms (CXL-1.0)

Version 1.0 · updated November 14, 2026

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This sample uses these resources

The symbols are blocks from our own libraries, with their attributes filled in. The sheet and its title block come from our ISO A3 title block template. Download them to draw your own diagrams.

What is in the ZIP

  • PID-Batch-Reactor-Sample.dwg
    Sample drawing (DWG, AutoCAD 2018 format)
  • Process-Template-ISO-A3.dwt
    Template (DWT) that the drawing was made on
  • CADXChange-Monochrome.ctb
    Plot style table (CTB) that prints every colour black
  • README.txt
    README with the layer list and how to use the files

The template

The process template has 14 layers with colours, line weights and linetypes (main, secondary and utility lines, electrical and pneumatic signals, equipment, boundaries, flow arrows, tags, line numbers, text and more), the text styles ISO-2.5 to ISO-5, the dimension style ISO-25 and an ISO A3 layout with a title block and revision table. The layer names are a common convention, not a standard; rename them to match your company's rules.

Layers defined

Every layer in the template with its colour, line weight and linetype, and how many objects of this sample are on it. Layers the sample does not use are still defined, ready for your own drawing.

LayerColourLine weightLinetypeUsed forObjects here
Process layers
PROC-PIPE-MAIN50.50 mmContinuousMain process lines27
PROC-PIPE-SEC40.35 mmContinuousSecondary and branch process lines6
PROC-PIPE-UTIL300.35 mmContinuousUtility lines (steam, condensate, cooling water, air)19
PROC-SIGNAL30.18 mmDASHEDElectrical signal lines6
PROC-PNEU60.18 mmDASHDOTPneumatic and capillary signal lines7
SYMBOL70.25 mmContinuousSymbols (the layer the symbol libraries use)28
PROC-EQUIP70.35 mmContinuousEquipment outlines drawn outside the symbol librariesnot used here
PROC-BOUNDARY10.18 mmDASHDOTPackage, skid and battery limitsnot used here
PROC-FLOW70.18 mmContinuousFlow arrows and flow direction marks13
PROC-TAG70.18 mmContinuousEquipment and instrument tagsnot used here
PROC-LINE-NO70.18 mmContinuousLine numbers and line specifications13
PROC-TEXT70.18 mmContinuousGeneral text57
PROC-NOTES70.18 mmContinuousNotes and legends4
PROC-DIM30.18 mmContinuousDimensionsnot used here
Sheet and symbol layers
07defaultContinuousDefault layer, keep it emptynot used here
FRAME7defaultContinuousSheet border5
TITLEBLOCK7defaultContinuousTitle block and revision table1
VIEWPORT8defaultContinuousLayout viewport frame (does not plot)2
DRAWING-AREA8defaultContinuousBoundary of the model drawing area (does not plot)2

Styles defined

The text styles, the dimension style and the linetypes that the template defines, so you do not have to set them up in each new drawing.

KindNameSettings
Text styleISOisocp.shx, 15°, variable height
Text styleISO-2.5isocp.shx, 15°, 2.5 mm high
Text styleISO-3.5isocp.shx, 15°, 3.5 mm high
Text styleISO-5isocp.shx, 15°, 5 mm high
Text styleTB-enArial, used by the title block
Dimension styleISO-25Text 2.5 mm, arrows 2.5 mm, extension lines 1.25 mm beyond the dimension line and 0.625 mm from the object, dimension lines 3.75 mm apart, 0 decimals
LinetypeContinuousSolid line
LinetypeDASHEDDashed
LinetypeDASHDOTDash-dot
LinetypeCENTERCentre line
LinetypePHANTOMPhantom line
LinetypeHIDDENHidden line

Sheet and drawing setup

How the sheet is set up, so your own drawings print the same way.

Sheet
ISO A3 landscape, 420 × 297 mm.
Layout
One layout named ISO-A3, plotted at 1:1 on full-bleed A3 media, so the sheet has no printer margin.
Border
20 mm from the left edge (binding side) and 10 mm from the other edges; the drawing area inside is 390 × 277 mm.
Model space
Units are millimetres. The drawing area is shown at 1:1, so 1 mm in the drawing is 1 mm on paper.
Title block
160 × 79 mm at the lower right, with a four-line revision table above the company, project, title and approval fields.
Text size
2.5 mm for labels and notes, 3.5 mm and 5 mm for headings.
Linetype scale
1, so dashes are sized for plotting at 1:1.
Plot style
None set. Pick the CTB from the ZIP in the page setup for black-and-white plots.

Title block fields

The attributes of the title block.

AttributeField on the sheetValue in this sample
COMPANYCOMPANYCADXChange
PROJECTPROJECTBatch Reactor Line
AREAAREAReaction and isolation
SYSTEMSYSTEMReactor R-201
CLIENTCLIENTSample
TITLEDRAWING TITLEPiping and instrumentation diagram
DRAWING_NODRAWING NO.P-601
CONTRACT_NOCONTRACT NO.—
REVREVA
DRAWNDRAWN—
CHECKEDCHECKED—
APPROVEDAPPROVED—
DATEDATE2026-11-15
SCALESCALENTS
SHEETSHEET1
SHEET_OFOF1

Revision table: R1 to R4, each with REV, DATE, DESCRIPTION and BY (16 attributes, empty in this sample).

Blocks in the drawing

The equipment list of the drawing: block name, symbol and how many times it is placed.

SymbolBlockPlaced
Valve, ball typePID_VALVE_BALL3
Discrete, fieldISA_DISCRETE_FIELD3
Shared (BPCS), main panelISA_SHARED_MAIN3
Pump, centrifugalPID_PUMP_CENTRIFUGAL2
Control valve, diaphragmISA_CV_DIAPHRAGM2
Tank, vessel with dished endsPID_TANK_DISHED_ENDS1
Strainer, Y typePID_STRAINER_Y1
Check valve (general)PID_CHECK_VALVE1
Liquid filter, bag / cartridgePID_FILTER_CARTRIDGE1
Jacketed vessel with agitatorPID_VESSEL_AGITATED_JACKET1
Heat exchanger, plate typePID_HX_PLATE1
Rupture discPID_RUPTURE_DISC1
Pressure safety valveISA_PSV_PRESSURE1
Flame arrestorPID_FLAME_ARRESTOR1
Separator, wet scrubberPID_SEP_SCRUBBER_WET1
Compressor, liquid ringPID_COMPRESSOR_LIQUID_RING1
Expansion joint, bellowsPID_BELLOWS1
Pump, diaphragmPID_PUMP_DIAPHRAGM1
Centrifuge, perforated shellPID_CENTRIFUGE_PERFORATED1
Rotary drum drierPID_DRIER_ROTARY1

Equipment schedule

One row per placed symbol, read from the attributes of the blocks in the drawing: what is shown on the sheet, and the schedule attributes that were filled in but are not shown.

TagDescriptionShown on the sheetFilled in, not shown
TK-101Tank, vessel with dished endsPID_TANK_DISHED_ENDSSERVICE = Feed tankCONTENT = Process liquidVOLUME_M3 = 25DESIGN_PRESSURE = 0.5 bar gDESIGN_TEMP = 60 CMATERIAL = SS 304
S-101Strainer, Y typePID_STRAINER_Y
P-101Pump, centrifugalPID_PUMP_CENTRIFUGALSERVICE = FeedFLUID = Process liquidFLOW_M3H = 60DIFF_HEAD_M = 45POWER_KW = 11DRIVER = Electric motorMATERIAL = SS 316
FL-101Liquid filter, bag / cartridgePID_FILTER_CARTRIDGE
R-201Jacketed vessel with agitatorPID_VESSEL_AGITATED_JACKET
E-201Heat exchanger, plate typePID_HX_PLATE
P-201Pump, centrifugalPID_PUMP_CENTRIFUGALSERVICE = FeedFLUID = Process liquidFLOW_M3H = 60DIFF_HEAD_M = 45POWER_KW = 11DRIVER = Electric motorMATERIAL = SS 316
RD-201Rupture discPID_RUPTURE_DISC
FA-301Flame arrestorPID_FLAME_ARRESTOR
SC-301Separator, wet scrubberPID_SEP_SCRUBBER_WET
VP-301Compressor, liquid ringPID_COMPRESSOR_LIQUID_RING
EJ-201Expansion joint, bellowsPID_BELLOWS
P-202Pump, diaphragmPID_PUMP_DIAPHRAGM
CF-401Centrifuge, perforated shellPID_CENTRIFUGE_PERFORATED
DR-401Rotary drum drierPID_DRIER_ROTARY

Manufacturer, model and remarks are left empty on every block, ready for your data. The values are examples.

How to use it

  1. Open the sample drawing to see how layers, text and the title block are used, or open it in the browser first, nothing to install.
  2. Start your own drawing from the template (NEW, then pick the DWT file). Copy the CTB file to your plot styles folder if you want black-and-white plots.
  3. Insert blocks from the symbol library into your drawing. The blocks in the sample are copies; they do not change when a library changes.

Frequently asked questions

Can I use the drawing for a real project?
As a starting point for layout and layers, yes. The ratings, settings and cable sizes are made up, so the diagram has to be checked and changed for your project before it is used for design or construction.
Why are the layers coloured?
Colours and line weights follow the layers: power circuits are red and heavy, control is cyan, signal is green. The plot style table in the ZIP prints everything black and keeps the line weights, so you can plot in black and white as well.
Which CAD programs open it?
The drawing and the template are in AutoCAD 2018 format, which AutoCAD 2018 and later open, and so do other CAD programs that read this format. The browser viewer needs nothing installed.