Get your P&IDs from VB Engineering: 3,000+ km drawn, 12k+ drawings delivered
Every line checked on site. P&IDs drafted, redrawn and updated for operating plants across India since 2014.
Trusted by the World’s Most Demanding Plants.
What is a P&ID drawing?
P&ID stands for piping and instrumentation diagram, also called a process and instrumentation diagram or P&I drawing. A P&ID drawing shows every pipe, valve, instrument and control loop that connects the equipment in a process plant. Plants use the P&ID diagram to operate, maintain and modify the plant, and every HAZOP is run on it. In practice the P&ID meaning is simple: it is the drawing every P&ID engineer, piping design team and operator trusts to show what is installed.
A P&ID is only useful while it matches the pipe. Every bypass, tie-in and replaced pump that never reaches the drawing makes the next decision on that drawing a guess. VB Engineering is a detail engineering company in India that drafts, redraws and updates P&IDs for operating plants, with site visits and measurements before a line is drawn.
Which P&ID services does VB Engineering provide?
VB Engineering provides five P&ID services, from drafting new P&IDs for a project to updating the drawings of a plant that has run for decades.
| Service | When plants ask for it | What you receive |
|---|---|---|
| P&ID drafting | A new plant, block or package needs P&IDs from the PFD and process data | Issued P&IDs in AutoCAD Plant 3D or your CAD standard, with line and equipment lists |
| P&ID redrawing | Paper, scanned or PDF drawings, or redline markups that were never drawn in | Clean CAD P&IDs that carry every redline and markup, ready for revision control |
| P&ID updation | An operating plant whose drawings no longer match the pipe | P&IDs checked line by line on site, corrected, with a discrepancy log |
| As-built P&IDs | Construction or a shutdown is complete and the close-out set is missing | As-built updates to the issued P&IDs, signed off against the installation |
| Intelligent P&IDs | The plant is moving drawings into a maintenance system, DCS project or digital twin | Intelligent P&IDs in AutoCAD Plant 3D, AVEVA or Hexagon Smart P&ID format with a tag database |
Our P&ID drafting services and P&ID drawing services cover P&ID design and P&ID engineering for new work as well as brownfield updation. For a combined P&ID update and HAZOP in pharma or chemical plants, see VB FieldSure for pharma and for chemicals.
When does a plant need its P&IDs drafted, redrawn or updated?
Plants call us when a decision depends on the drawings and nobody trusts them: a project, an expansion, a HAZOP, or a drawing set that was lost.
Which standards do VB P&IDs follow?
VB draws P&IDs to ANSI/ISA-5.1-2024 symbology and tagging by default, and to PIP, ISO, DIN or JIS conventions when your plant standard calls for them.
| Standard | What it governs on your P&IDs |
|---|---|
| ANSI/ISA-5.1-2024 | Instrumentation and control symbols and identification: instrument bubbles, tag letters and loop numbering. |
| PIP PIC001 | Piping and instrumentation diagram documentation criteria: what a P&ID must show and how it is laid out. |
| ISO 10628-2 | Graphical symbols for diagrams in the chemical and petrochemical industry, used on European-standard plants. |
| Your plant standard | DIN, JIS or a company drafting standard, followed sheet by sheet when your plant uses one; AutoCAD Plant 3D PIP, ISA, ISO/DIN and JIS libraries are all supported. |
Running a HAZOP after the update? VB FieldSure verifies the P&IDs and runs the HAZOP on them as one engagement.
What does a P&ID drafting job deliver?
Every P&ID drafting or updation job delivers the drawings in your format plus the registers your engineers work from.
- P&IDs in AutoCAD Plant 3D, AutoCAD or your CAD standard (DWG and PDF)
- Intelligent P&IDs with a tag database, on request
- PFDs drafted or updated alongside the P&IDs
- Line list built from the drawings
- Equipment list with tags and key data
- Instrument list on request
- Redline markups and PFDs converted into issued drawings
- Site visits and measurements for every updation
- Discrepancy log: every difference found on site
- Revision control and a drawing register
Send your drawing register or a few sample sheets and we price exactly what you have.
How much does P&ID drafting or updation cost per drawing?
P&ID drafting and updation are priced per drawing: a redraw from a clear source costs less than an updation that needs a site walkdown, and LiDAR is added only where the plant is too congested to trace by eye. Enter your numbers below and an engineer emails a checked price estimate with a written proposal.
| Part of the work | How it is priced | What moves the price |
|---|---|---|
| P&ID drafting or redrawing | Per drawing, from PFD, markups or the old set | Source quality, symbols per sheet, CAD or intelligent format |
| P&ID updation with site walkdown | Per verified drawing: walkdown, redline, CAD, check | Plant access, congestion, how far the plant has drifted |
| LiDAR scan (where needed) | Per area scanned | Rack density, height, number of scan positions |
Get a price estimate
Three inputs. An engineer compares them with plants we have drawn before and emails an estimate with the proposal.
An engineer validates your inputs and emails the estimate with a written proposal. No obligation, and five P&IDs can be checked on site first if you want proof.
How are P&IDs updated to match an operating plant?
P&IDs are updated in four steps: every line is walked and measured on site, marked up, drawn in CAD and checked before issue.
Walk
Each line traced and measured, LiDAR where racks are dense.Mark up
Differences marked in red on the drawing and logged.Draw
Redlines and PFDs converted into CAD or intelligent P&IDs.Check
Each sheet checked against the markups, then issued.A P&ID nobody has walked is an opinion, not a drawing. Maintenance isolations, tie-in designs and HAZOP nodes are all decided on the P&ID. If the drawing misses a bypass or a replaced valve, every one of those decisions inherits the error.
Which scanners and software does VB use for P&ID and as-built work?
VB captures plants with the Leica RTC360 laser scanner, registers the scans in Leica Cyclone REGISTER 360 PLUS and Autodesk ReCap Pro, and draws P&IDs and 3D models in AutoCAD Plant 3D and Autodesk Revit. Your drawings come back in the format your engineers already open every day.
| Stage | Tools we work in | What you receive |
|---|---|---|
| Capture | Leica RTC360 laser scanner · FARO Focus and Trimble X7 where your site specifies them · field walkdown with redline markup | Coloured 3D scans of every area in scope, with photos |
| Register | Leica Cyclone REGISTER 360 PLUS · Autodesk ReCap Pro | One registered point cloud (E57, RCP or RCS) |
| Draw P&IDs | AutoCAD Plant 3D P&ID · AutoCAD P&ID · AVEVA and Hexagon Smart P&ID formats on request | Verified P&IDs in DWG and PDF, with the tag database |
| Model | AutoCAD Plant 3D · Autodesk Revit | 3D plant model, isometrics and general arrangement drawings |
| Review | Autodesk Navisworks | One federated model your team can walk through and mark up (NWD) |
Running a different platform? Tell us which one in the form. We deliver in the software and drawing standard your plant already uses.
Product names are trademarks of their respective owners.
What does a P&ID updation for an operating plant look like?
A typical updation starts with the plant’s own drawing register, walks every line in the chosen areas, and ends with an issued set your engineers can mark up again at the next change.
The first walk of a plant that has run for years usually finds the same things: a bypass fitted during a campaign and never drawn, a pump replaced under a new tag, a hose connection that became permanent, a drain routed to a new header. Each finding is marked in red, logged and drawn in, and the line and equipment lists are rebuilt from the corrected sheets so the drawings and the registers agree.
Want your plant’s drawings to match the pipe? Start with a price estimate.
Who draws, checks and approves your P&IDs?
Every proposal names the engineer who walks and draws, the checker and the approver, with CVs.
P&ID and piping lead
Named with CV in the proposalIndependent checker
Named with CV in the proposalVB Engineering approver
Named with CV in the proposalP&ID drafting services: questions buyers ask
How much does a P&ID drawing cost per sheet in India?
A P&ID is priced per drawing. Redrawing from a clear source costs least; updation with a site walkdown costs more because every line is traced; LiDAR adds cost only in congested areas. Enter your numbers in the estimator and an engineer emails a checked estimate.
Who provides P&ID updation services in India?
VB Engineering provides P&ID updation from its engineering centre in India to plants across the country, with engineers who walk the plant before drawing. Drafting-only firms redraw what they are sent; updation means checking the drawing against the pipe.
How are P&IDs updated to match an operating plant?
Every line in the agreed areas is walked and measured, differences are marked in red, the redlines are drawn into CAD and each sheet is checked before issue, with a log of every change.
Can you recreate P&IDs when the original drawings are lost?
Yes. Where no usable set exists, the P&IDs are rebuilt from a site walkdown, equipment data and, where needed, a LiDAR scan, then issued as a new controlled set.
Can AI read P&IDs?
AI can read the symbols on a drawing but cannot confirm that a line still exists in the plant, so every sheet still needs a site check. How drawing digitisation works.
Can scanned or PDF P&IDs be converted to intelligent P&IDs?
Yes. Scanned and PDF drawings are redrawn as intelligent P&IDs with a tag database and checked against the plant before issue. PDF and paper drawings to CAD.
What do you deliver with the P&IDs?
DWG and PDF drawings or intelligent P&IDs, plus a line list, an equipment list, PFDs where required, a drawing register and the discrepancy log from site.
How long does it take to update P&IDs for a plant?
It depends on the number of drawings, plant access and how far the plant has drifted from them. Your proposal states the site days and the drafting duration for your drawing count.
Should P&IDs be updated before a HAZOP?
Yes. A HAZOP reviews what is on the drawing, so lines missing from it are never studied. IS 15656:2006 lists detailed P&I drawings as a HAZOP input.
What is the difference between P&ID drafting and P&ID updation?
Drafting produces drawings from design data or an old set. Updation checks an operating plant against its drawings and corrects them, so the issued P&ID shows what is actually installed.
Where to go next
Get a price estimate for your P&IDs
Tell us how many P&IDs, what state they are in and the format you need. An engineer checks the details and emails an estimate with a written proposal.
- Five P&IDs checked on site first, if you want proof
- A discrepancy log you can hand to your team
- An estimate for the full drawing set
Prefer to write? connect@groupvb.com · or WhatsApp us from the chat button
VB Group® · Sustainability A Certainty.
Six fields. One written proposal.
Your name, work email and company, the type of P&ID work, and whether you need onsite data collection.