Engineering & Manufacturing
Where heavy engineering becomes hardware
Fabrication, welding, NDT, heat treatment and mechanical testing — the complete technical backbone behind every G. R. Engineering delivery.
Large vessels, columns & process equipment
Shop fabrication of pressure vessels up to 6.5 m diameter and 425 MT single-piece, and columns up to 6.8 m diameter and 110 m long — across three dedicated fabrication bays at Tarapur works, including a 27 m × 160 m heavy bay.
Columns & Towers — Max Parameters
- Maximum Diameter
- 6.8 m
- Maximum Length
- 110 m
- Single-Piece Weight
- 225 MT
- Shell Thickness
- 102 mm
Pressure Vessels — Max Parameters
- Maximum Diameter
- 6.5 m
- Maximum Length
- 35 m
- Single-Piece Weight
- 425 MT
- Shell Thickness
- 125 mm
Controlled welding for code-critical joints
Welding technology is a dedicated function at Tarapur works, with qualified procedures and welders for carbon steel, low-alloy steel, stainless, clad, duplex, super duplex and titanium construction — under ASME Section VIII / Section IX discipline for 'U' and 'U2' stamped equipment.
- Qualified WPS / PQR across CS, LAS, SS, clad, duplex & titanium
- Weld mapping, traceability and staged hold-point inspection
- Supported by in-house NDT and mechanical testing at every stage
Fourteen in-house examination methods
A separate radiography enclosure, gamma ray sources (Cobalt 60, Ir-192), advanced ultrasonic methods and leak testing — all in-house, all under the quality plan of each job.
Radiography — separate enclosure
X-Ray
Gamma Ray (Cobalt 60, Ir-192)
Ultrasonic Flaw Detection (UT)
TOFD — Time-of-Flight Diffraction
PAUT — Phased Array UT
Magnetic Particle Testing (MT)
Liquid / Dye Penetrant Testing (PT)
Positive Material Identification (PMI)
Ferrite Checking
DFT Coating Thickness Measurement
Pneumatic Testing
Helium Leak Detection
Hydrostatic Testing up to 500 kg/cm² g
PWHT / PFHT for the largest fabrications
Post-weld and post-forming heat treatment in a diesel (LDO) fired bogie hearth furnace sized for complete vessels — with time–temperature recording for code compliance.
- Furnace Type
- Bogie hearth, LDO fired
- Furnace Size
- 6 m H × 6 m W × 12 m L
- Processes
- PWHT / PFHT
- Recording
- Time vs. temperature charts
In-house NABL-accredited laboratory
Destructive testing in-house — from ambient-temperature tensiles to impact testing at −195 °C — closing the loop between procedure qualification and production welds.
- Tensile Testing
- In-house NABL-accredited laboratory
- Impact Testing
- Down to −195 °C
- Bend Testing
- Weld & parent material qualification
- Shear Bond Testing
- Clad bond integrity
- Hardness Testing
- Including HAZ and weld zones
Fabrication Bays — Tarapur Works
Three bays, one heavy-industrial campus
Bay A — Light Fabrication
22 m wide × 140 m long
Bay B — Machining
20 m wide × 140 m long
Bay C — Heavy Fabrication
27 m wide × 160 m long
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Discuss your fabrication requirements, EPC projects, heavy equipment, site fabrication or project execution with our engineering team.