As-Built Engineering in India · Hyderabad

When the legacy drawing package no longer matches the plant, we rebuild it: P&ID + isometric + GA + process drawings reconciled to LiDAR ground-truth, drafted in your CAD environment, ready for handover into the India regulator audit cycle.

Why as-built engineering in India starts with a reconciliation, not a redraft

Across the 21 refineries, 35 GW of thermal capacity, and 600+ industrial estates that anchor India's manufacturing base, a reconciled as-built drawing package is what every regulator, insurer, and digital-twin handover ultimately depends on. India runs one of the most concentrated brownfield retrofit markets in the world: 21 refineries operating between 1965 and 2018 vintages, 35 GW of thermal capacity overdue for arc flash recertification, and a pharma cluster (Hyderabad, Visakhapatnam, Ahmedabad) where every API plant carries IS 5571 hazardous-area exposure. India's greenfield era is largely past for refineries and metals. The next decade of value comes from brownfield expansion, debottlenecking, and digital-twin handover on plants that are 15-40 years old. That is where every one of our last 1,000+ studies has happened.

The drafting standards we apply on India as-built engagements

P&ID and instrumentation drafting follows ISA S5.1 with PIP PIC001 as the reference for process-industry symbology. Isometric drafting follows ISO 6428. Where the operator references IS 3043 (earthing) · IS 5571 (hazardous area classification) · IS/IEC 60909 (short-circuit) · IS 13947 (LV switchgear), the deliverable formatting layer aligns to it; line numbering, equipment tagging, and revision-control discipline are invariant.

What you receive · the six as-built deliverables for India

Reconciliation Walk + Discrepancy Log

LiDAR-backed reconciliation against the legacy P&ID / GA / isometric package. Every discrepancy logged with point-cloud screenshot, equipment-tag location, and recommended disposition. The log becomes the basis for the formal as-built revision.

P&ID Rebuild or Markup

P&ID drafted to ISA S5.1 in your CAD environment (AutoCAD P&ID, SmartPlant P&ID, AVEVA P&ID, Bentley OpenPlant). Where the existing P&ID is recoverable, we mark up to the as-found condition; where it is not, we rebuild from the field plus operator interviews.

Isometric Drawing Production

Isometric drafting from the LiDAR point cloud against ISO 6428 conventions. Spool list, fabrication isometric, and weld-map deliverable structure depending on the downstream workflow.

GA + Plot-Plan Reconciliation

GA drawing reconciled against the as-found equipment layout. Plot-plan updated with the new equipment positions, elevations, and access-route updates. Tie-in to civil + structural drawings where the operator package is integrated.

Process Drawing Updates

Process flow diagram (PFD), heat and material balance, and utility flow drawings updated against the as-found process configuration. Where the process has drifted from the original design (a recurring finding on plants over 20 years old in India), we document the drift and align the deliverable to the operating condition.

Asset Register + Digital Twin Hand-Off

Equipment tag list, line list, and instrument index reconciled to the point cloud. The full package hands directly to the Wistwin digital-twin platform or the operator's asset-management system with no re-registration required.

Three brownfield as-built engagements we have delivered in India

Three engagements that show how this works in practice across Indian brownfield plants:

Refinery (Gujarat)

a 220,000 BPD coastal refinery with 1996-vintage 132 kV intake.

The engagement: PESO 5-year renewal triggered relay coordination + arc flash + transformer-health re-baselining; existing SLD predated last DCS upgrade.

Pharma API (Hyderabad)

a USFDA-inspected API plant with Zone 1 process bays.

The engagement: A short-circuit incident at the LT panel during expansion forced unplanned EHS audit; client needed CEng-signed Arc Flash + Coordination study in 18 working days.

Steel (Odisha)

a 5 MTPA integrated steel plant with 220 kV captive power + EAF + LF + caster.

The engagement: Coordination drift on the EAF feeder caused nuisance trips on the rolling mill side; harmonic measurement + protection re-grading restored stability.

As-Built Engineering in India · the questions buyers actually ask

Buyer questions we hear consistently across PESO-renewal, CEIG-stamp, and OISD-117 conversations in India:

Does the study come with CEng MIE FIE sign-off the way CEIG and PESO expect?

Yes. Every deliverable carries a wet signature from a Chartered Engineer holding both MIE (India) and FIE membership, which is the recognised authority CEIG and PESO inspectors accept for relay-coordination and arc-flash documentation.

Will you reconcile to our existing CEIG-approved SLD or start from scratch?

We reconcile. If the CEIG-stamped SLD exists, we mark up deviations, walk the plant with LiDAR, and produce a delta report. We only rebuild from scratch when the legacy SLD is unrecoverable.

Can you support a PESO licence renewal audit timeline?

Yes. The standard PESO renewal cycle gives 90 days notice. We have completed an end-to-end Power System + Arc Flash + Insulation Coordination package inside 21 working days when the timeline demanded it.

Tell us what package you need rebuilt in India. A drafting lead responds inside 24 hours.

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As-Built Engineering. India.