E-123 (AutoCAD Standard)

Guidance Notes

SECTION AutoCAD Drawing Standards No. E123

TITLE: Structuring and Layering of AutoCAD Drawings

DATE 25/01/2007 Page 1 of 28 Version No. 1http://home.simoncarves.com/Active/home/Libraries/EngineeringStandards.nsf/LookupAll/B4A98D90EDB752B0802571A10043A9DE/$File/E123_v1.doc

Template : Quality/W0750 – User Manual/04.04.2002

1.0 SCOPE 3

2.0 DRAWING AND CAD REFERENCE DRAWINGS 3

3.0 FILING OF CAD DRAWINGS 3

4.0 DRAWING SHEET SIZES 4

5.0 DRAWING TEMPLATE FILES (.DWT) 5

5.1.1 SSC-Template 55.1.2 Drawing Frames 65.1.3 Layers 65.1.4 Text 85.1.5 Dimensions 85.1.6 Line Types 8

6.0 EXTERNAL REFERENCES 9

7.0 SCALES 9

8.0 MODEL SPACE / PAPER SPACE 10

9.0 SYMBOLS 10

10.0 PLOTTING 11

11.0 MENU’S 11

12.0 APPENDIX 1 12

12.1 Civil and structural engineering 1212.1.1 Draughting Procedures 1212.1.2 Templates 1212.1.3 Drawing Scale 1212.1.4 Drawing Units 1212.1.5 Text 1312.1.6 Layers 1312.1.7 Colours 1312.1.8 Linetypes 1412.1.9 Model Space/Paper Space 1512.1.10 Symbols 15

Guidance Notes





13.0 APPENDIX 2 16

13.1 Controls and electrical engineering 1613.1.1 Draughting Procedures 1613.1.2 Templates 1613.1.3 Drawing Scale 1613.1.4 Layers 1613.1.5 Department Prefixes. 1813.1.6 Line Types (BSEN 61082) 1813.1.7 Model Space/Paper Space 1913.1.8 Additional Reference 19

14.0 APPENDIX 3 20

14.1 P&ID / PFD Line DIAGRAMS 2014.1.1 Draughting Procedures 2014.1.2 Templates 2014.1.3 Drawing Scale 2014.1.4 Drawing Frames 2014.1.5 Layers 2114.1.6 Folder Hierarchy 2314.1.7 Symbol Libraries 2314.1.8 Plotting 2314.1.9 Pallets / Toolbars 23

15.0 APPENDIX 4 25

15.1 Plant design 2515.1.1 Scope 2515.1.2 Draughting Procedures 2515.1.3 Templates 2515.1.4 Drawing Scale 2515.1.5 Drawing Scale 2615.1.6 Layers 2615.1.7 Department prefixes. 2715.1.8 Linetypes 2715.1.9 Model Space/Paper Space 2815.1.10 Imports From 3D Modeling Package (PDMS) 28

Guidance Notes





1.0 SCOPE

This document is a general guide for all AutoCAD users. It is designedto allow the creation of drawings that are consistent in quality andformat.

All drawings shall be legible under the intended conditions of use.

It is the responsibility of the user to follow these guidelines. Thisdocument should be used unless a specific project document dictatesotherwise.

2.0 DRAWING AND CAD REFERENCE DRAWINGS

Drawing numbers and CAD reference numbers shall be in accordancewith the SembCorp Simon-Carves (SSC) coding Manual. This can befound on the SSC Intranet, under Company Management System /Standards / Engineering / Company Coding Manual (Section 19 P&L).

3.0 FILING OF CAD DRAWINGS

For consistency all AutoCAD drawings are to be saved in AutoCAD2000 Format.

All drawings shall be stored on the network, in the correct projectdirectory and in the relevant sub-directories.

Drawings MUST NOT be stored on local drives.

Any drawing that has a revision change will be regarded as issued.

If a drawing has been issued, a copy must be placed in the relevantrevision folder, which should be a sub-folder of the relevant projectfolder.

To ensure that only the latest version of any drawing is available formodification, revision folders will be made “read only”.

Modifications will then be completed to the file in the project folder.

Guidance Notes





4.0 DRAWING SHEET SIZES

The following table shows the recommended drawing sheet sizes fromBSEN 61082.

Designation Dimensions (mm)

A0 1189 x 841

A1 841 x 594

A2 594 x 420

A3 420 x 297

A4 297 x 210

An SSC drawing frame for each size will be used via the appropriatetemplate file and will not be modified unless agreed in advanced withCAD Development. Refer to Section 6 AutoCAD Drawing Standards.

Sheet sizes used should be selected taking into account:

• Legibility

• The composition and complexity of the design

• The possibility of using a smaller sheet, but with a greaternumber of sheets

• The requirements of Computer Aided Design andDocumentation

• The requirements of handling, copying, filing and otherdocumentation processes.

Guidance Notes





5.0 DRAWING TEMPLATE FILES (.DWT)

All new drawings are to be created using the appropriate drawingframe template. A template file will be made available for each size ofdrawing and where necessary “Project Specific” templates will beproduced.

Template files will contain the following default data and settings:

Drawing Frames

Layers

Text Styles

Dimension Styles

Line Types

5.1.1 SSC-Template

The SSC-Templates will contain all non-discipline specific settings, and willbe used as the initial file for all discipline/project specifictemplates.

Guidance Notes





5.1.2 Drawing Frames

A template for each size of drawing will be used (e.g. SSC-STANDARD-A0.dwt).

For consistency, the drawing frame will always be placed at x=0, y=0.

All drawing will be completed in Model Space and should be drawn fullsize (refer to Section 8 for exceptions)

Drawing Limits should be set to suit the drawing frame being used.

Title block information will be inserted using the attributes assigned tothe drawing frame.

Drawing frames and associated data blocks must not be exploded.

A plot stamp will be placed on all drawings to identify the filename andlocation.

5.1.3 Layers

Standard Layer names will be preceded with “0_” (zero). This willensure that all standard layer names are displayed at the top of thelayer listing.

(The AutoCAD layer “Defpoints” is not included in this rule.)

All items should be drawn on the correct designated layer.

The preferred entity selection settings are :-

LINEWEIGHT – set to DEFAULT

LINETYPE – set to BYLAYER

COLOUR –set to BYLAYER

Only one line type should be used per layer.

The number of layers and layer settings required will differ greatlydepending upon the type of drawing being produced. Refer to thediscipline standard (Section 2.0 of this document) for further details.

Guidance Notes





The following table displays layers that are to be consistent regardlessof project or Discipline (* Indicates discipline specific changes mayoccur for colours).

Layer Name Layer Function Colour

0Default AutoCAD layer.No drawings should becreated on this layer.

White

0_BorderContains Drawing frameand title block data

White

DefpointsDefault AutoCAD layerused for Dimensioning.

White

*0_Dim

Default Dimensioninglayer. Additional Dimlayers may be added asrequired.

Red/Yellow

0_Hold Hold clouds and notes Red

*0_Notes Text notes Blue/Yellow

0_RevisionRevision clouds andrevision triangles

Red

0_Stamp

Default layer for blocksrepresenting office stamps(“Superseded, InformationOnly” etc.

Magenta

*0_TextGeneral text andannotation layer

White/Yellow

0_VportsView port borders, non-plotable

Magenta

0_XrefDefault layer to be setwhen using Xref drawings.

Grey (8)

Guidance Notes





5.1.4 Text

Vertical (upright) letters will normally be used.

Upper Text Case text only to be used (unless specifying units e.g mm,kW etc.).

Text – One font per Style, one style per layer.

e.g. Style = NOTES, Font = Romans H3 x W 0.8, Notes Layer

Style = TEXT, Font= Romans H3 x W 0.8, Text Layer

AutoCAD font names must not be used as style names.

It is recommended that, depending upon the original drawing size, thefollowing table be used to determine text height.

A0 A1 A2 A3 A4

Max 5.0 4.0* 3.5 3.5 3.5

Min 3.5 3.0* 2.5 2.5 2.5

(Table in ISO 6428) * indicates SSC variation

5.1.5 Dimensions

Default Dimension style SSC-Dim to be used where possible.

Refer to appropriate Appendices for additional dimension stylesrequired by individual disciplines.

5.1.6 Line Types

All line types are set by the layering system, and individual lines shouldnot be changed.

All entities shall be set to Line type by layer.

Where possible, only standard metric AutoCAD line types are to beused (ACADISO.LIN).

Guidance Notes





Only one line type should be used per layer.

LTSCALE= 1.0

PSLTSCALE= 1.0

MEASUREMENT=1.0

All layers should have a line weight setting of “Default”.

Polylines are to be used for “thick” lines

The thickness of lines should be chosen from the following range:

0.18, 0.25, 0.35, 0.5, 0.7, 1.0, 1.4 and 2mm (BSEN 61082).

Owing to difficulties in certain methods of reproduction, the linethickness 0.18 should be avoided where possible.

6.0 EXTERNAL REFERENCES

All external reference drawings should be referenced from theappropriate Layer (0_Xref).

The preferred method of transferring drawing files should be completedusing ETransmit, this will ensure that all associated Xref drawing filesare included.

7.0 SCALES

All drawings are to be created FULL SIZE, and where necessaryscaled using view ports. If it is intended that dimensions are to bederived by measuring the drawing, a length scale bar should beincluded on the drawing.

The recommended scales used within view ports are specified in thefollowing table.

Note: Additional scales may be used, refer to the appropriateappendices for further details.

Guidance Notes





Category Recommended Scales

EnlargementScales

50:15:1

20:12:1

10:1

Full Size 1:1

ReductionScales

1:21:201:2001:2000

1:51:501:5001:5000

1:101:1001:10001:10000

(Table in ISO 5455)

8.0 MODEL SPACE / PAPER SPACE

All drawing is to be completed in Model Space FULL SIZE

With the exception of diagrams and schematics, all drawing frames,title block data, notes etc, to be included in Paper space.

The use of associative dimensioning in Paper space is recommended.

9.0 SYMBOLS

The meaning of a symbol is defined by its shape and content.

The size and line thickness do not normally affect its meaning.

The general shape of the symbol should be maintained and, ifpractical, also the relative proportions.

In some instances, it may be necessary or advantageous to usedifferent sizes of symbols:

� To increase the number of inputs or outputs

� To facilitate the inclusion of additional information.

� To emphasize certain aspects

Guidance Notes





� To facilitate the use of a symbol as a qualifying symbol.

Unless the Project indicates, SSC Standard symbols will be used at alltimes.

Symbols must not be modified in any way without the consent of CADDevelopment.

10.0 PLOTTING

All plots to be full size (scaled views created via view ports). E.g. plotExtents or Limits.

Standard SSC ctb files are to be used at all times.

11.0 MENU’S

Only AutoCAD standard menu files or SSC approved menus are to beused. No additions or changes are to be made to any menu withoutagreement from CAD Development.

No additional menus are to be used without the consent of CADDevelopment.

Guidance Notes





12.0 APPENDIX 1

12.1 CIVIL AND STRUCTURAL ENGINEERING

12.1.1 Draughting Procedures

� Good drawing practise must be adhered to.

� Every endeavour must be taken to eliminate multiple entries, linesmade up of multiple lines and joining lines not placed using OSNAP.

12.1.2 Templates

All drawings will be produced using the latest SSC Standard templateSSC-CIVIL-STRUCTURAL.dwt.

12.1.3 Drawing Scale

All drawings are to be drawn full size.

Drawings produced using scales are unacceptable, unless using a bolt-on packages (such as MultiSteel).

Scaling is to take place using the appropriate view ports andrecommended scale ratios (Refer to Section 7 AutoCAD DrawingStandards).

Category Additional Scales

ReductionScales

1:33, 1:75, 1:125, 1:250

12.1.4 Drawing Units

The UNITS command should be set to 2 decimal places fordimensioning and to 2 decimal places for angles.

Guidance Notes





12.1.5 Text

Text shall be 3mm, 5mm, or 7mm high, Romans font, upper case.General annotation should be 3mm high, with 5mm and 7mm high textused for titles, building names or specific notes etc. (Refer to Section6.1.3).

12.1.6 Layers

General layers (i.e. AO- sheet, A1 – sheet, Dimensions and Symbols)are pre-set on the SSC Standard template.

Layer Name Layer Function Colour Line Type

3mmText 3mm high text Yellow Continuous

5mmText 5mm high text Red Continuous

7mmText 7mm high text Cyan Continuous

CONCRETE Concrete / Walls Green Continuous

GRIDGrid Reference

LinesBlue CENTER2

HATCH Hatch patterns 13 Continuous

STEELWORKSteel structures /

assembliesYellow Continuous

SYMBOLSStandardsymbols

Green Continuous

DIMS Dimensions 9 Continuous

12.1.7 Colours

COLOUR / LINE THICKNESS

COLOUR THICKNESS

8 - DARK GREY13 - BROWN251 - DARK GREY

0.1

Guidance Notes





5 - BLUE9 - LIGHT GREY111 - MINT

0.18

7 - WHITE31 - ORANGE41 - PUCE

0.25

2 - YELLOW3 - GREEN52 - MUSTARD

0.35

1 - RED6 - MAGENTA231 - PINK

0.5

4 - CYAN151 - AQUA191 - PURPLE

0.7

These colours are generally recommended to be used as follows:-

Colour 5,7,9,31, 41 & 111 Hidden detail, centre, grid, dimensionsand all background detail, secondaryannotation

Colour 2, 3 & 52 Main outlines of subject, main annotation(3mm text)

Colour 1, 6 & 231 Reinforcing and outlines, annotation(5mm text)

Colour 4, 151 & 191 Border outlines and reinforcing, titles etc(7mm text)

Colour 5 Construction lines

Colour 8, 13 and 251 Hatching only

12.1.8 Linetypes

Continuous Used for outlines, borders, reinforcing anddimensions

Centre Used for centrelines and grid lines

Hidden Used for hidden/background detail

Guidance Notes





Other linetypes Used where appropriate

The LTSCALE setting shall be set to 1 and the PSLTSCALE variableshould be set to 1 (ie. On).

12.1.9 Model Space/Paper Space

Drawings may be produced using paper space in accordance with thefollowing criteria:

All dimensions, grid lines markers and any text on the model (i.e.Building titles etc) should be placed in model space.

All general notes should be placed in paper space.

The model should be, wherever possible, drawn at its correct site planco-ordinate or level location relative to 0,0.

12.1.10 Symbols

All symbols can be found in G:\SSC- AutoCAD\CIVIL_SYMBOLS

Guidance Notes





13.0 APPENDIX 2

13.1 CONTROLS AND ELECTRICAL ENGINEERING


� Drawing limits to be set to the size of backing sheet e.g. A0 is 1189 x 841mm.

� Draw with Snap switched ON (should be set to an integer i.e. not 2.5).

� Draw with Ortho switched ON, Mirror text (Mirrtext) OFF and Blipmode OFF.

� Plot to Limits.

� Stamp office copies and file originals in accordance with D.O. Procedures.

13.1.2 Templates

All drawings will be produced using the latest SSC Standard templateSSC-CONTROL-ELECTRICAL-.dwt.



Drawings produced using scales are unacceptable.


13.1.4 Layers

Layer Name Duty Colour

Att Attributed Blocks Cyan

Background Plant layout from PDMS or Client Grey

Guidance Notes





Bound Boundary lines segregating areas Blue

Draw Main Outline of Drawing Green

Equipment MCC’s, Panels, Scada, DCS, JB’s, P.B.Stations, Interface Racks, Earth Bars etc.

Green

MechlinkMechanical link e.g. relay contacts (linetypehidden) Cyan

Misc Miscellaneous items Varies

E-RouteRefRoute References associated with cablerouting (Elec)

Orange(30)

I-RouteRefRoute References associated with cablerouting (Inst) Green

Screen Cable Screens (linetype hidden) Magenta

SiteplanSketch of site showing area covered bydrawing White

StampAny blocks like a stamp e.g. ‘Superseded’ or‘For Information’ Magenta

SymbolsElectrical symbols e.g. Fuse, Switch, Motor,Lamp etc. Cyan

E-Tray Cable Tray / Ladder Rack (Elec)Orange(30)

I-Tray Cable Tray / Ladder Rack (Inst) Green

WirePanel Wiring e.g. Loop diagrams, Circuitdiagrams Green

Guidance Notes





13.1.5 Department Prefixes.

When there are more than one department’s layers on a drawing ALLlayers should be prefixed by a single character code.

This code denotes which department is responsible for each layer.

The code could also be used to identify Instrument and Electrical layerson a drawing e.g. E-RouteRef and I-RouteRef.

Prefix Department

0- (Zero)General use, not reserved to any one department e.g. borderlayer

C- Civil

E- Electrical

I- Instruments

P- Plant Design

S- Structural

13.1.6 Line Types (BSEN 61082)

Line Description Normal Application

Continuous Primary lines, main contents of a diagram

Short Dashed(Hidden)

Secondary lines, mechanical connections, plannedextensions, hidden outlines and hidden edges

Chain (Centre)Physical Boundaries, Centre lines and lines ofsymmetry

Chain, DoubleDashed

(Phantom)Grouping of Components

Guidance Notes










13.1.8 Additional Reference

BSEN 61082 “Preparation of documents used in electrotechnology”.

Guidance Notes





14.0 APPENDIX 3

14.1 P&ID / PFD LINE DIAGRAMS


� All drawing is to be completed in Model Space.

� Drawing SNAP switched ON (should be set to an integer i.e. not 2.5).

� Draw with ORTHO switched ON

� Plot to LIMITS

14.1.2 Templates

All drawings will be produced using the latest SSC Standard templateSSC-PID.dwt.

Where appropriate “Project Specific” templates will be produced byCAD Development.

(Refer Section 5 AutoCAD Drawing Standards)




14.1.4 Drawing Frames

Drawings will be produced on A0 size sheets (Section 4 AutoCADDrawing Standards)

The appropriate drawing frame and completed title block data will beadded. (Refer to Section 5.1.2 of AutoCAD Drawing Standards).

Drawing frames are added in Model Space.

Guidance Notes





14.1.5 Layers

Layer Name Layer Function Colour *Line Type

ATT_EQUIPEquipmentAttribute data

White Continuous

ATT_INLINE

InlineComponentAttribute data(valve tags etc)

White Continuous

ATT_INST

Instrumentattribute data(loop numbersetc)

White Continuous

BOUNDARYPackage AreaBoundary Lines

Blue DASHDOT

EQUIP_MAJOR

Outline of majorEquipment(Vessels, Tanksetc).

Red Continuous

EQUIP_MINOR

Outline of MinorEquipment(Pumps, motorsetc). MajorEquipmentInternals andTrims

Red Continuous

EXISTINGExisting PlantItems

White Continuous

FUTUREFuture PlantItems

Cyan Hidden

I_CAPCapillary tubing(Filled Systems)

200 CAPILLARY

Guidance Notes





I_COMM

ElectricalCommunicationsSignal / SoftwareLine

11 COMMS

I_ELECElectrical orUndefined Signal

150 Hidden2

I_HYD Hydraulic Signal 140 HYDRAULIC

I_PNEU Pneumatic Signal 10 PNEUMATIC

I_SONIC Sonic Line 242 SONIC

INST

InstrumentSymbols andinstrument PlantConnections

Cyan Continuous

INLINEInline blocks(Valves etc)

Green Continuous

MAJORMajor ProcessLines

Magenta Continuous

MINORMinor ProcessLines

Cyan Continuous

MISC

MiscellaneousItems (Walls,Concrete, hatchetc)

White Continuous

T_LINENUM Line number Text White Continuous

T_PINEquipment TagNumbers

White Continuous

T_VALVEAdditional ValveText

White Continuous

REF_ITEMS

Items whichappear on morethan onePID/PFD

Grey Hidden

Wipeout Wipeout Frames Red Continuous

*All drawing Entities are to have the “LineType” set to “BYLAYER”.

Guidance Notes





14.1.6 Folder Hierarchy

All drawings that have been Issued/Superseded will be removed fromthe “current status folder” and stored in the appropriate sub-folder.

14.1.7 Symbol Libraries

Only SSC Standard symbols (based on BS 1553) should always beused, unless the project indicates otherwise.

CAD Development is responsible for the creation and maintenance ofall symbol and symbol libraries.

All symbols should be according to L502 unless the project dictatesotherwise.

Symbols should not be exploded, or changed in any way.

Symbols should always be placed on the appropriate layer

14.1.8 Plotting

To maintain symbol and text integrity and consistency, all plots shouldbe produced Full Size.

All plots should use the appropriate CTB file.

A0.ctb - For Monochrome A0 size plots.



Layout.ctb - For Layout drawings with a feint background.

Colour.ctb - For coloured plots (created as required).

The batch plotting facility is available and will use the appropriate ctbfile as detailed above.

14.1.9 Pallets / Toolbars

SSC Standard pallets/toolbars will contain standard commands. CADDevelopment is responsible for the creation and modification of thesepallets/toolbars and these must not be modified in any way.

Guidance Notes





Project Specific pallets/toolbars will contain project specificmodifications/additions to the SSC Standard pallets/toolbars. CADDevelopment is responsible for the creation and modification of thesepallets/toolbars and these must not be modified in any way.

Users may create their own pallets/toolbars for their own use. CADdevelopment is not responsible for these.

IMPORTANT NOTE

SSC and Project pallets/toolbars must take priority over userpallets/toolbars i.e if a command occurs on the SSC Standard and theUser pallet, the SSC Standard must be used.

Guidance Notes





15.0 APPENDIX 4

15.1 PLANT DESIGN

15.1.1 Scope

This Appendix includes details for creating Mechanical and Pipingdrawings from within AutoCAD. It also includes recommended settingsfor models converted from a 3D modelling package (PDMS).


� Drawing limits to be set to the size of backing sheet e.g. A0 is 1189 x 841mm.

� Draw with Snap switched ON (should be set to an integer i.e. not 2.5).

� Draw with Ortho switched ON, Mirror text (Mirrtext) OFF and Blipmode OFF.

� Plot to Limits.

� Stamp office copies and file originals in accordance with D.O. Procedures.

15.1.3 Templates

All drawings will be produced using the latest SSC Standard templateSSC-MECHANICAL-PIPING.dwt.

Where appropriate “Project Specific” templates will be produced byCAD Development.

(Refer Section 5 AutoCAD Drawing Standards)





Guidance Notes









15.1.6 Layers

The Simon Carves basic layers are not intended to cover thosecomponents that form the subject of the drawing; they only support itsenvironment.

Extra layers specific to the subject will need to be created such as,e.g., ‘EQUIPMENT’, ‘STEELWORK’, etc.

Sub-division of Layers

Where necessary, layer names may be sub-divided by furtherspecifying the type of component held on them. This should be done byconcatenating the relevant aspects of the components, in decreasingorder of significance, using hyphens. The following is just a sample ofpossible layer names that could be produced this way:

EQUIPMENT

EQUIPMENT-TEXT

EQUIPMENT-DIMS

EQUIPMENT-DIMS-DETAIL1

EQUIPMENT-DIMS-DETAIL2

Guidance Notes





15.1.7 Department prefixes.

When there are more than one department’s layers on a drawing ALLlayers should be prefixed by a single character code. The codedenotes which department is responsible for each layer. The codecould also be used to identify Instrument and Electrical layers on adrawing e.g. E-RouteRef and I-RouteRef.

Prefix Department

0- (Zero)General use, not reserved to any one department e.g. borderlayer

C- Civil

E- Electrical

I- Instruments

P- Plant Design

S- Structural

15.1.8 Linetypes

Line DescriptionNormal Application

Continuous Primary lines, main contents of a diagram

Short Dashed(Hidden)

Secondary lines, mechanical connections, plannedextensions, hidden outlines and hidden edges

Chain (Centre) Physical Boundaries, Centre lines and lines ofsymmetry

Chain, DoubleDashed

(Phantom)

Grouping of Components

Guidance Notes










15.1.10 Imports From 3D Modeling Package (PDMS)

The necessary views will be generated in PDMS and an appropriate“DXF” file will be made available.

All DXF file must clearly display the following:-

• The scale of the view. (Due to restrictions within PDMS, anyDXF views created will need to be scaled. This scale will beclearly indicated on the drawing file e.g. Scale = 1:500. Whenimported into AutoCAD, the view should then be re-set to fullsize.)

• Fixed datum point at known co-ordinate. This should be clearlyvisible and accurate, as it will be used as the insertion point.

• Layer should be created within the DXF to conform as close aspossible to the above layering structure.

• Line types used will be standard AutoCAD linetypes.

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