Oil & Gas
Live-plant and shutdown environments where hot-work permits, gas testing and isolation discipline govern how and when work proceeds.
Industries
Where the work happens
Four sectors, each with its own permit regime, inspection expectations and tolerance for downtime.
Sectors served
Subhadip Das Construction delivers high-quality Engineering, Procurement and Construction (EPC) services across Oil & Gas, Petrochemical, Infrastructure and Industrial sectors.
Petrochemical
Process units where material traceability, weld inspection and coating specification are contractual, not advisory.
Infrastructure
Civil and structural packages measured against IS and IRC specifications, with sequencing tied to site access and weather windows.
Commonly engaged for
Industrial
General plant and workshop packages — fabrication, erection and planned maintenance scheduled around production availability.
Not sure your plant fits one of these?
Scope matters more than sector label. If the work involves fabrication, erection, commissioning or planned maintenance under permit and inspection discipline, send the specification and we will confirm whether it is something we take on.
Capabilities
Twelve service lines across all four sectors
- Piping / Pipeline ProjectsWe execute Piping and Pipeline works from fabrication to commissioning, including welding, NDT, hydrotesting, flushing, reinstatement, valve installation, and on-line instrument hook-ups.
- Tankage (Fabrication & Installation)Fabrication and erection of CS / MS / SS storage tanks, including shells, floors, roofs, nozzles, manways, and walkways, executed as per API 650 and PESO guidelines, with dimensional accuracy, fit-up, alignment, and hydrotesting for reliable storage service.
- Structural Steel Fabrication & ErectionDesign, fabrication and erection of trusses, sheds, pipe racks, platforms, staircases, handrails, equipment supports and structural assemblies including alignment, bolting, welding, sheeting, and finishing as per IS / AWS structural codes.
- Blasting, Painting & GalvanizationWe perform Copper Slag / Grit / Sand Blasting and industrial airless painting, along with Hot-Dip Galvanization and Zinc Coating.
- Authorised Applicator – Protective CoatingsWe are an authorised applicator specialising in protective coatings for tank bottom plates and roof decks.
- Roof Drain SystemSDC Roof Drain System provides safe and reliable drainage for Floating roof storage tanks, ensuring smooth rainwater removal without leakage or binding.
- Civil WorksRCC foundations, industrial flooring, drains, boundary walls, approach roads, retaining walls, and structural concrete works.
- Electrical WorksHT/LT cabling, industrial plant wiring, earthing systems, cable tray installation, electrical panel mounting, termination, loop checking, IR testing, and commissioning.
- Mechanical Equipment Erection & CommissioningErection and commissioning of pumps, compressors, vessels, heat exchangers, and process equipment, including alignment, leveling, grouting, piping interface, and functional testing as per OEM and industrial safety standards.
- Industrial Shutdown & Maintenance ServicesPlanned shutdowns, maintenance, equipment overhauling, valve servicing, pipeline replacement, and restoration works executed in controlled schedules with safety & quality compliance for reliable plant restart.
- Tank Repair & Maintenance ServicesComprehensive tank repair and maintenance including Bottom plate replacement, Roof repair, shell patching, LMS and Shunt installation, internal coating, and foundation repairs, executed as per API 653 standards to ensure safety, quality, and long service life.
- Research Equipment DevelopmentWe work to design and develop custom R&D apparatus, supporting universities, R&D centers, and industries requiring custom-built laboratory instruments, prototype development, and high-precision research equipment.