3D plant modelling and 3D CAD drafting services in India, for plant expansions, revamps and 2D-to-3D conversion.

3D plant modelling is the work of building a measured, three-dimensional model of a process plant: equipment, structures, platforms, piping and main cable routes, placed where they stand on site. Plants use the model to plan an expansion or revamp, check that new equipment fits, find clashes before construction, hand a reliable base to an EPC, and give operations one current picture of the plant.

Because most clashes, rework and shutdown overruns in a revamp come from drawings that no longer match the plant. A 3D model built and checked against the plant shows where new equipment and lines can actually go, lets the projects team, the EPC and operations agree the layout on screen, and produces a list of every place the old drawings were wrong before anything is fabricated.

VB collects the 2D GAs, elevations, P&IDs and vendor drawings, ranks them by revision, and builds structures and equipment from them. Positions, nozzle orientations and elevations that the drawings leave in doubt are checked on a site walk, or captured by laser scan in congested areas. A second engineer checks the model against the drawings and the walk notes, and every drawing error found is issued as a discrepancy list with the model.

A basic CAD model is geometry: shapes in the right place. An intelligent 3D plant model also carries data on each object: equipment tag, line number, size, specification and links to the equipment list and P&ID. It can produce drawings, material lists and reports from the model itself, which is why EPCs and maintenance teams ask for it. VB builds to whichever level your use needs.

All three are specification-driven plant design platforms: AutoCAD Plant 3D from Autodesk, AVEVA E3D from AVEVA, and Smart 3D (formerly SmartPlant 3D) from Hexagon. Large EPCs often standardise on E3D or Smart 3D; many owner and mid-size projects use Plant 3D. VB models in AutoCAD Plant 3D and AVEVA E3D, and issues a Navisworks review file that anyone can open.

A 3D plant model gives an EPC or consultant a checked starting point: the existing plant in their design platform, the equipment list with tags, GA plans and elevations from the model, and a list of where the old drawings were wrong. Detailed engineering then starts from the plant as it is, and clashes with existing steel and piping are found in design review, not at site.

A model can be built from drawings when they are reasonably current and the area is open. A laser scan is worth it where racks are congested, drawings are missing, or new work must tie into existing piping to millimetres. VB often mixes the two: drawings for the open plant, a scan for the tie-in zone. The scan itself is done by VB's LiDAR scanning team.

The cost of a 3D model of an operating plant in India depends on the number of equipment items and the area to model, the level of detail, the state of your drawings, whether a site walk or a laser scan is needed, and the software and deliverables required. Run the free 3D model scope check on this page for a written scope and price estimate in two business days.

An OEM receives native 3D part and assembly models, a general arrangement drawing of the product, detailed manufacturing drawings for each part with dimensions, tolerances and material callouts, and a bill of materials. VB works from your sketches, old 2D drawings, a physical sample, or a design brief, in SolidWorks or AutoCAD and in your title block.

ASME Y14.5 sets dimensioning and geometric tolerancing rules used on US-standard drawings. The ISO 128 series sets how technical drawings are presented, and ISO 1101 covers geometric tolerancing in the ISO system. Which one applies depends on the standard your customer or parent company works to; VB drafts to either and states it on the title block.

AI tools can now generate simple part geometry from a prompt or an image and speed up some drafting tasks. A model of an operating plant is different: it depends on measured positions, judging which of several conflicting drawings is right, and checking what was changed on site and never drawn. That still needs an engineer, and at VB every model is checked by a second one.

3D plant modelling in India is offered by engineering arms of EPC contractors, specialist plant design firms and offshore CAD outsourcing companies. For a model of an operating plant, ask whether the firm checks the model against the plant, can combine drawings with a laser scan, and issues a discrepancy list. VB Engineering has done this since 2014 and has delivered 12,000+ drawings across 21 countries.