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Storage

Tanks

Storage tanks are large, engineered containers used in refineries to hold crude oil, intermediate products, and finished fuels under atmospheric or pressurized conditions. They serve as critical assets for inventory management, process buffering, and product segregation, and are designed to meet stringent safety, environmental, and operational standards.

Description

In refinery operations, storage tanks come in various configurations such as fixed roof, floating roof, cone roof, and pressure vessels, each tailored to the type of fluid stored and the operating environment. These tanks are constructed from carbon steel or alloy materials and are equipped with nozzles, manways, vents, and level indicators to facilitate safe operation and monitoring. Over time, tanks are subject to corrosion, sludge accumulation, structural wear, and seal degradation, necessitating periodic inspection and maintenance.

Inspection & Testing

  • Complete Health check of existing Tank.
  • Visual inspection of shell, roof, bottom, and nozzles
  • Non-destructive testing (NDT): ultrasonic thickness, magnetic particle, dye penetrant, and radiographic testing
  • Settlement and roundness checks
  • Leak detection and hydrostatic testing
  • API 653 compliance inspections

Cleaning & Decontamination

  • Hydro-jetting of Tank inside.
  • Confined space entry with safety protocols

Maintenance & Repair

  • Shell and roof patching or replacement
  • Nozzle and manway servicing
  • Bottom plate repairs/replacement and annular ring replacement
  • Seal replacement for floating roofs
  • Welding repairs on structural components

We perform hydrostatic testing and leak detection to verify tank integrity and compliance with API 653 and OISD standards. Maintenance activities cover shell patching, bottom plate replacement, nozzle servicing, and seal repairs for floating roofs. For aging or modified tanks, we provide structural upgrades, instrumentation retrofits, and emission control enhancements.

SnC Infratech offers a full suite of mechanical services for storage tanks, beginning with thorough inspections (i.e. Complete health check) using visual methods and non-destructive testing techniques such as ultrasonic thickness measurement, magnetic particle testing, radiography, Dye penetrant testing, Vacuum box testing, Thickness gauging and Low frequency electromagnetic testing.

Our teams are trained in confined space protocols and execute all work under strict safety and environmental guidelines. Every project is documented with inspection reports, repair logs, and compliance records to ensure transparency and traceability. With a focus on precision, safety, and turnaround efficiency, SnC Infratech ensures that your storage tanks remain reliable, compliant, and ready for continuous operation.

Tank Modification & Upgrade (Design & Construction)

  • Conversion of fixed roof to floating roof
  • Installation of mixers, heaters, or internal piping
  • Retrofit of emission control systems (Conversion of External floating roof to Internal floating roof tank)
  • Upgrading tank instrumentation and automation

Design, Construction & Fabrication

  • New tank fabrication and erection
  • Rolling, welding, and assembly of shell plates
  • Roof and stairway installation

Documentation & Compliance

  • Inspection and repair reports
  • As-built drawings and modification logs
  • Compliance with API and IS standards
  • Safety audits and risk assessments.

At SnC Infratech, we offer end-to-end mechanical services for storage tanks used in refinery operations, ensuring structural integrity, environmental compliance, and operational safety. Our expertise covers fixed roof, floating roof, cone roof, and pressurized tanks used for storing crude oil, intermediates, and finished products. We begin with comprehensive inspections using visual methods and advanced non-destructive testing techniques such as ultrasonic thickness gauging, magnetic particle testing, and radiography to assess shell, roof, and bottom plate conditions. Our cleaning and decontamination services include sludge removal, chemical cleaning, and gas-freeing to prepare tanks for safe entry and maintenance. We perform critical repairs such as bottom plate patching, annular ring replacement, nozzle servicing, and seal repairs for floating roofs. For aging or modified tanks, we offer structural upgrades, internal modifications, and retrofitting of emission control systems and instrumentation. Our team also undertakes new tank fabrication and erection, including foundation preparation, shell plate rolling, and roof installation. All work is executed under strict safety protocols and documented in compliance with API 650, API 653, and OISD standards. With a focus on precision, safety, and turnaround efficiency, SnC Infratech ensures that your storage tanks remain compliant, reliable, and ready for continuous service.

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