Ship bilge and ballast piping diagram: sample DWG file with pumps, valves, tanks and marine template
A complete piping diagram of two ship systems on one sheet. The bilge system collects water from three engine room bilge wells through strainers and screw-down non-return valves, pumps it with a duty and a standby pump to an oily water separator and sends the cleaned water overboard, while the sludge goes to a holding tank and a shore connection. The ballast system takes sea water through two sea chests with remote operated inlet valves, strainers, duty and standby ballast pumps and remote operated tank valves into four ballast tanks. Bilge and ballast lines have their own layer and colour, every symbol carries a tag, and an equipment list and notes are on the 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.
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
- Ship-Piping-Bilge-Ballast-Sample.dwg
Sample drawing (DWG, AutoCAD 2018 format) - Marine-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 marine template has 19 layers with colours, line weights and linetypes (hull, decks, tanks, hidden items, centre and frame lines, bilge, ballast, sea water, fuel oil, fire and air pipes, remote control lines, symbols, tags, line numbers, text, notes and dimensions), 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 yard's or class society'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.
| Layer | Colour | Line weight | Linetype | Used for | Objects here |
|---|---|---|---|---|---|
| Marine layers | |||||
| MAR-HULL | 7 | 0.50 mm | Continuous | Hull, shell and watertight bulkhead lines | 2 |
| MAR-DECK | 8 | 0.35 mm | Continuous | Decks, tank tops, superstructure and funnel outlines | not used here |
| MAR-TANK | 5 | 0.25 mm | Continuous | Tank and compartment boundaries | not used here |
| MAR-HIDDEN | 8 | 0.18 mm | HIDDEN | Hidden items and items below the plan level | not used here |
| MAR-CL | 1 | 0.13 mm | CENTER | Centre line, base line and waterline | not used here |
| MAR-FRAME | 1 | 0.13 mm | DASHDOT | Frame lines, perpendiculars and station marks | not used here |
| MAR-PIPE-BILGE | 30 | 0.35 mm | Continuous | Bilge, drain and sludge lines | 31 |
| MAR-PIPE-BALLAST | 5 | 0.35 mm | Continuous | Ballast water lines | 34 |
| MAR-PIPE-SW | 4 | 0.35 mm | Continuous | Sea water and cooling water lines | not used here |
| MAR-PIPE-FO | 6 | 0.35 mm | Continuous | Fuel oil and lubricating oil lines | not used here |
| MAR-PIPE-FIRE | 1 | 0.35 mm | Continuous | Fire main and fire-fighting lines | not used here |
| MAR-PIPE-AIR | 3 | 0.35 mm | Continuous | Air, vent, sounding and overflow lines | not used here |
| MAR-CTRL | 8 | 0.18 mm | DASHED | Remote control and signal lines | not used here |
| SYMBOL | 7 | 0.25 mm | Continuous | Symbols (the layer the symbol libraries use) | 40 |
| MAR-TAG | 7 | 0.18 mm | Continuous | Equipment, valve and compartment tags | not used here |
| MAR-LINE-NO | 7 | 0.18 mm | Continuous | Line numbers and service labels | 7 |
| MAR-TEXT | 7 | 0.18 mm | Continuous | General text, view titles, tables | 45 |
| MAR-NOTES | 7 | 0.18 mm | Continuous | Notes and legends | 6 |
| MAR-DIM | 3 | 0.18 mm | Continuous | Dimensions | not used here |
| Sheet and symbol layers | |||||
| 0 | 7 | default | Continuous | Default layer, keep it empty | not used here |
| FRAME | 7 | default | Continuous | Sheet border | 5 |
| TITLEBLOCK | 7 | default | Continuous | Title block and revision table | 1 |
| VIEWPORT | 8 | default | Continuous | Layout viewport frame (does not plot) | 2 |
| DRAWING-AREA | 8 | default | Continuous | Boundary 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.
| Kind | Name | Settings |
|---|---|---|
| Text style | ISO | isocp.shx, 15°, variable height |
| Text style | ISO-2.5 | isocp.shx, 15°, 2.5 mm high |
| Text style | ISO-3.5 | isocp.shx, 15°, 3.5 mm high |
| Text style | ISO-5 | isocp.shx, 15°, 5 mm high |
| Text style | TB-en | Arial, used by the title block |
| Dimension style | ISO-25 | Text 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 |
| Linetype | Continuous | Solid line |
| Linetype | DASHED | Dashed |
| Linetype | DASHDOT | Dash-dot |
| Linetype | CENTER | Centre line |
| Linetype | PHANTOM | Phantom line |
| Linetype | HIDDEN | Hidden 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. Double-click it to fill them in, or write them for a whole set of drawings with BlockSync.
| Attribute | Field on the sheet | Value in this sample |
|---|---|---|
| COMPANY | COMPANY | CADXChange |
| PROJECT | PROJECT | Sample Cargo Vessel |
| AREA | AREA | Machinery space and double bottom |
| SYSTEM | SYSTEM | Bilge and ballast |
| CLIENT | CLIENT | Sample |
| TITLE | DRAWING TITLE | Bilge and ballast system |
| DRAWING_NO | DRAWING NO. | M-601 |
| CONTRACT_NO | CONTRACT NO. | — |
| REV | REV | A |
| DRAWN | DRAWN | — |
| CHECKED | CHECKED | — |
| APPROVED | APPROVED | — |
| DATE | DATE | 2026-10-21 |
| SCALE | SCALE | NTS |
| SHEET | SHEET | 1 |
| SHEET_OF | OF | 1 |
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. BlockSync exports the same list from your own drawings.
| Symbol | Block | Placed |
|---|---|---|
 Butterfly valve, hydraulic | MAR_VALVE_BUTTERFLY_HYD | 6 |
 Gate valve | MAR_VALVE_GATE | 4 |
 Pump, in-line | MAR_PUMP_INLINE | 4 |
 Non-return valve | MAR_VALVE_CHECK | 4 |
 Ballast water tank | MAR_TANK_BALLAST | 4 |
 Tank | MAR_TANK | 3 |
 Basket strainer | MAR_STRAINER_BASKET | 3 |
 Screw-down non-return valve | MAR_VALVE_SDNR | 3 |
 Overboard discharge | MAR_OVERBOARD | 2 |
 Sea chest | MAR_SEA_CHEST | 2 |
 Y strainer | MAR_STRAINER_Y | 2 |
 Oily water separator | MAR_OWS | 1 |
 Bilge holding tank | MAR_TANK_BILGE | 1 |
 Blank flange | MAR_FLANGE_BLIND | 1 |
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. BlockSync exports these same attributes from your own drawings.
| Tag | Description | Shown on the sheet | Filled in, not shown |
|---|---|---|---|
| BW-1 | TankMAR_TANK | SERVICE = Bilge waterCAPACITY_M3 = 2DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 30-36LOCATION = Machinery space | |
| S-201 | Basket strainerMAR_STRAINER_BASKET | SIZE = DN100SERVICE = Bilge waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| V-211 | Screw-down non-return valveMAR_VALVE_SDNR | SIZE = DN100VALVE_TYPE = Screw-down non-returnPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| BW-2 | TankMAR_TANK | SERVICE = Bilge waterCAPACITY_M3 = 2DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 30-36LOCATION = Machinery space | |
| S-202 | Basket strainerMAR_STRAINER_BASKET | SIZE = DN100SERVICE = Bilge waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| V-212 | Screw-down non-return valveMAR_VALVE_SDNR | SIZE = DN100VALVE_TYPE = Screw-down non-returnPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| BW-3 | TankMAR_TANK | SERVICE = Bilge waterCAPACITY_M3 = 2DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 30-36LOCATION = Machinery space | |
| S-203 | Basket strainerMAR_STRAINER_BASKET | SIZE = DN100SERVICE = Bilge waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| V-213 | Screw-down non-return valveMAR_VALVE_SDNR | SIZE = DN100VALVE_TYPE = Screw-down non-returnPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| V-22A | Gate valveMAR_VALVE_GATE | SIZE = DN100VALVE_TYPE = GatePRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| P-201A | Pump, in-lineMAR_PUMP_INLINE | SERVICE = Bilge waterFLOW_M3H = 60HEAD_M = 30MOTOR_KW = 11VOLTAGE = 440 V 3ph 60 HzSPEED_RPM = 1750 | |
| NRV-201A | Non-return valveMAR_VALVE_CHECK | SIZE = DN100VALVE_TYPE = Swing checkPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| V-22B | Gate valveMAR_VALVE_GATE | SIZE = DN100VALVE_TYPE = GatePRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| P-201B | Pump, in-lineMAR_PUMP_INLINE | SERVICE = Bilge waterFLOW_M3H = 60HEAD_M = 30MOTOR_KW = 11VOLTAGE = 440 V 3ph 60 HzSPEED_RPM = 1750 | |
| NRV-201B | Non-return valveMAR_VALVE_CHECK | SIZE = DN100VALVE_TYPE = Swing checkPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Bilge water | |
| OWS-201 | Oily water separatorMAR_OWS | SERVICE = Bilge waterCAPACITY = 5 m3/hPOWER_KW = 2.2PRESSURE_BAR = 3DESIGN_TEMP_C = 60VOLTAGE = 440 V 3ph 60 Hz | |
| BH-201 | Bilge holding tankMAR_TANK_BILGE | SERVICE = Bilge waterCAPACITY_M3 = 12DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 30-36LOCATION = Machinery space | |
| OD-201 | Overboard dischargeMAR_OVERBOARD | SIZE = DN100SERVICE = Bilge waterMATERIAL = Ductile ironLOCATION = Machinery space | |
| F-201 | Blank flangeMAR_FLANGE_BLIND | SIZE = DN100SERVICE = Bilge waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| SC-1 | Sea chestMAR_SEA_CHEST | SIZE = DN250SERVICE = Ballast waterMATERIAL = Ductile ironLOCATION = Machinery space | |
| SIV-1 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| S-301 | Y strainerMAR_STRAINER_Y | SIZE = DN250SERVICE = Ballast waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| SC-2 | Sea chestMAR_SEA_CHEST | SIZE = DN250SERVICE = Ballast waterMATERIAL = Ductile ironLOCATION = Machinery space | |
| SIV-2 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| S-302 | Y strainerMAR_STRAINER_Y | SIZE = DN250SERVICE = Ballast waterMATERIAL = Ductile ironPRESSURE_RATING = PN10MESH_MM = 3 | |
| V-31A | Gate valveMAR_VALVE_GATE | SIZE = DN250VALVE_TYPE = GatePRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Ballast water | |
| P-301A | Pump, in-lineMAR_PUMP_INLINE | SERVICE = Ballast waterFLOW_M3H = 400HEAD_M = 25MOTOR_KW = 45VOLTAGE = 440 V 3ph 60 HzSPEED_RPM = 1750 | |
| NRV-301A | Non-return valveMAR_VALVE_CHECK | SIZE = DN250VALVE_TYPE = Swing checkPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Ballast water | |
| V-31B | Gate valveMAR_VALVE_GATE | SIZE = DN250VALVE_TYPE = GatePRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Ballast water | |
| P-301B | Pump, in-lineMAR_PUMP_INLINE | SERVICE = Ballast waterFLOW_M3H = 400HEAD_M = 25MOTOR_KW = 45VOLTAGE = 440 V 3ph 60 HzSPEED_RPM = 1750 | |
| NRV-301B | Non-return valveMAR_VALVE_CHECK | SIZE = DN250VALVE_TYPE = Swing checkPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = HandSERVICE = Ballast water | |
| OD-301 | Overboard dischargeMAR_OVERBOARD | SIZE = DN250SERVICE = Ballast waterMATERIAL = Ductile ironLOCATION = Machinery space | |
| BV-301 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| WB-1 | Ballast water tankMAR_TANK_BALLAST | SERVICE = Ballast waterCAPACITY_M3 = 150DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 62-80LOCATION = Double bottom | |
| BV-302 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| WB-2 | Ballast water tankMAR_TANK_BALLAST | SERVICE = Ballast waterCAPACITY_M3 = 150DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 62-80LOCATION = Double bottom | |
| BV-303 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| WB-3 | Ballast water tankMAR_TANK_BALLAST | SERVICE = Ballast waterCAPACITY_M3 = 150DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 62-80LOCATION = Double bottom | |
| BV-304 | Butterfly valve, hydraulicMAR_VALVE_BUTTERFLY_HYD | SIZE = DN250VALVE_TYPE = Butterfly, waferPRESSURE_RATING = PN10END_CONNECTION = FlangedMATERIAL = Ductile ironACTUATION = Remote hydraulicSERVICE = Ballast water | |
| WB-4 | Ballast water tankMAR_TANK_BALLAST | SERVICE = Ballast waterCAPACITY_M3 = 150DESIGN_PRESSURE_BAR = 3MATERIAL = Steel, coatedFRAME_RANGE = Fr 62-80LOCATION = Double bottom |
Manufacturer, model and remarks are left empty on every block, ready for your data. The values are examples.
How to use it
- 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.
- 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.
- Insert blocks from the symbol library into your drawing. The blocks in the sample are copies; they do not change when a library changes.
- Double-click the title block to fill it in, then export the equipment list with BlockSync.
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.