STS operates two specialized fabrication workshops in Oman, located at Nizwa and Sohar industrial zones covering a total area of 125,700 sqm.

We have covered fabrication areas in excess of 24,500 sqm. with effective fabrication height of 10.5 m under hook and single lift capacity of 800MT within the facility. Both the shops are equipped with modern facilities. Our Nizwa facility has inhouse cold rolling capacity upto 239 mm.

Our facilities are well equipped with state-of-the-art fabrication & welding machinery such as CNC cutting, metal forming, welding, heat treatment, machining and material handling equipment. Facilities also include dedicated bays for heavy fabrication, vessel fabrication shops, dish forming area, machine shops and seperate areas for fabrication of exotic materials welding.

The Facility also includes a 3,000 sqm. of covered maintenance shop to cater to pump maintenance, machining, valve repair, testing, refurbishment and calibration.

Special Achievements
  • Fabrication of HRSG / OTSG – First time in Oman
  • Manufactured & Supplied process equipment with more than 50 meter in length
  • Manufactured and Supplied 162+6, 153+6, 143+6 mm heavy thick Clad vessel to PDO, Oman
  • Manufactured and Delivered longest column for PDO, Oman
  • Delivered more than 600 process equipments
  • Delivered more than 85 clad/weld overlaid vessels
  • Delivered more than 45 nos. of ASME Sec. VIII Div. 2, U2 stamped heavy pressure vessels
  • Delivered more than 750 skid packages for various applications for the Oil & Gas Industry
  • Manufactured & Delivered process skids with height more than 9 meter in single unit
  • CRA/SDSS Piping Fabrication for Projects outside Oman
Services Offered

Manufacturing Process equipment

Fabrication & Assembly of Process Skids & Modules

Pipe Spool Fabrication

Heat Transfer Equipment Fabrication


Welding & Fabrication:

750+Welding procedures using various welding techniques including GTAW, GMAW, SMAW, SAW, FCAW, ESSC and Automatic GTAW (Orbital) Welding of exotic materials such as Alloy 625, Alloy 825, 6 Mo, SDSS, DSS, SS316, Low Alloy Steel (P11, P22, P91), Monel , Hastealloy



  • Maintenance, Repair and Testing of Pumps, Valves and other industrial machinery
  • Machining & Equipment Assembly works


Site Services:

  • Field Repair and Modification of existing facility including repair of pressure equipment,
  • Hot tapping
  • Field Tie-ins
  • Field erection of piping
Product List

Process Equipment

  • Pressure Vessels
  • Reactors
  • Stripper columns
  • Columns and Towers
  • 3 Phase / 2 Phase Separators
  • Deaerators
  • Scrubbers
  • Test Separators /Steam Separators
  • Fuel Gas Separators / Cyclone Separators
  • Desalters / Desanders


Heat Transfer Equipment

  • Shell & Tube Heat Exchangers ( All TEMA Type)
  • Condenser
  • Oil & Gas Coolers
  • Kettle Type Exchangers
  • Pre-Heaters / Re Heaters
  • Steam Generators (OTSG and HRSG Modules)
  • Hairpin Type Heat Exchanger
  • Double Pipe Heat Exchangers (Jacketed Type)


Process Modules & Skid Assemblies

  • Gas Dehydration Packages
  • Well Hook Up Skids
  • Refrigeration Packages (Compressor & Chiller Modules)
  • Boil Off Gas Skids
  • Cyclic Steam Services Manifolds
  • RO & ERD Modules
  • Remote Gathering Manifolds
  • Fuel Gas conditioning skids
  • Chemical Injection Skids
  • Multiport Selector Valves (MSV) skids
  • Metering Skids


Other Oil & Gas Equipment and Services

  • Pig Launchers & Receivers
  • Storage Tanks of API 650 / EN BS14015 / EN 12285
  • Nutshell Filters / Coalescer Filters
  • Strainers / Filters
  • Orifice plates and Orifice Assemblies
  • Piping pre-fabrication
  • Structural Fabrication
Workshop Facilities and Capabilities:

Click here for Workshop Facilities and Capabilities:

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