P&ID extraction for water and wastewater.
Sequential capital programs leave drawings of mixed vintage on the same site. A SCADA upgrade, a plant expansion, an industrial reuse retrofit, and the prior decade's package-plant commissioning packs all live in the same controlled archive.
What water and wastewater drawings carry.
- Municipal P&IDs run simpler than industrial P&IDs, fewer SIS tags, lighter loop density but carry decades of in-house tagging variation
- Package skids interface with the plant PLC through discrete signal lists, run, fault, mode. The skid interface signals extract from the main P&ID
- Free-text annotations, "Flow Meter Type. Magnetic" extract into the description field. Signal class follows the ISA letter code
- SCADA tag databases, Wonderware, Ignition, Siemens WinCC, GE iFix accept the Excel export columns. TIA Portal and Studio 5000 use the direct XML, L5X exports
- Pump-station SCADA upgrades cover dozens of remote sites with thin per-site drawings. A workspace per site rolls up into a utility-wide register
- Disinfection drawings, chlorine gas, sodium hypochlorite, UV, ozone carry analyzer and dosing-pump density. Surface as a service-filtered subset
- Industrial water reuse and ZLD plants overlap with chemical-plant patterns more than municipal treatment. RO trains, softener regen loops, and evaporator-crystallizer scope follow process-plant tagging
- MBR and granular-activated-sludge plants carry tighter loop density than conventional activated sludge
What the extraction delivers.
- Classified I/O list with AI, AO, DI, DO per instrument
- Equipment list. Pumps, basins, tanks, filters, blowers, chemical feeders
- Line list with size, pipe spec, and service
- Process variable inference from letter codes, ISA 5.1, AWWA M2, EN 752, in-house
- Valve details with fail position and actuator type
- Revision comparison for change documentation
- Exports to TIA Portal, Studio 5000, PLCCreator, DEXPI, Excel
Instrument tags on a water and wastewater drawing.
- FT-INF-1101Flow transmitter on plant influent, area 11, loop 01
- AT-CL-2305Analyzer transmitter for chlorine residual, area 23, loop 05
- LT-CL2-4108Level transmitter on a clarifier, area 41, loop 08
- FCV-DOSING-7102Flow control valve on a chemical-dosing skid, area 71
- AT-UV-INT-5202UV intensity sensor on a disinfection bank
- FT-RAS-3401Return activated sludge flow on a secondary clarifier underflow line
Regulatory context.
- US Safe Drinking Water Act and Clean Water Act drive monitoring documentation
- EU Drinking Water Directive and Urban Waste Water Treatment Directive set the equivalent EU regimes
- State or provincial environmental regulators audit instrument-list as-builts as part of permit compliance
- AWWA M2 is the reference manual for instrumentation and control in water utilities
Which discipline reads it.
Controls EngineersInfluent, secondary treatment, and disinfection instrumentation. SCADA across lift stations and remote pumping sites.Process EngineersAeration, clarifier, and disinfection scope. Chemical-feed loop integration. Nutrient-removal flow control.Electrical EngineersPump and blower MCC galleries. Standby-generator and emergency-power scope. UV-disinfection power distribution.Project EngineersPlant-expansion and SCADA-upgrade phase handover with brownfield drawing reconciliation.
Common questions
Does this handle municipal P&IDs and industrial P&IDs the same way.
Yes. ISA 5.1 tags read regardless of sector. Municipal plants run simpler line conventions and fewer SIS tags. Industrial plants run more complex loops. Both extract without per-sector configuration.
Can the I/O list feed directly into a SCADA or HMI tag database.
The Excel export carries the tag, signal class, description, and connected equipment. Wonderware, Ignition, Siemens WinCC, and GE iFix accept Excel or CSV import with those columns. TIA Portal and Studio 5000 use the direct XML, L5X exports.
What about chemical feed pumps and dosing skids with their own PLCs.
Packaged skids interface with the plant PLC through a discrete signal list, run, fault, mode. The skid interface signals extract from the main P&ID. The internal skid I/O lives in the skid vendor documentation.
Is this acceptable for as-built documentation.
The extraction is the starting dataset. Every row passes through a review step before export. The exported Excel includes an audit-trail sheet with confidence and source-page information. The engineer review is the sign-off step.
Can it process pump-station SCADA-upgrade drawings across dozens of remote sites.
Yes. A workspace per site keeps the per-site I/O list tractable. A utility-wide rollup workspace aggregates the per-station documents into a consolidated tag register for the SCADA upgrade.
How does this work on water-reuse and ZLD scope.
Industrial water reuse, RO, and ZLD plants extract more like chemical plants than municipal treatment. The line list captures brine, permeate, and concentrate spec breaks. The equipment list captures membrane modules, evaporators, and crystallizers where the drawing tags them.
Run it on your water and wastewater drawings.
Upload a P&ID set and see the instruments, equipment, and lines it reads before committing to a plan.