What we do


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

Our workshops are well equipped with state-of-the-art fabrication & welding machinery and material handling equipment. Workshop facilities include heavy fabrication bays, vessel fabrication shops, dish forming area, machine shops, areas dedicated to exotic materials welding and aluminium welding.

We have covered fabrication areas in excess of 24,500 sqm. with effective fabrication height of max. 10.5 m under hook and single lift crane capacity of 100 tons. In Addition to the EOT cranes, Nizwa facility is equipped with lifting jacks which can lift upto 800MT in single piece.

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

Our operations are certified to ISO 9001:2015 Quality management system and shops are approved by Petroleum Development Oman, ORPIC, BP in Oman and other major Oil & Gas, Refinery & Petrochemical companies across GCC.

Services Offered

Manufacturing of Pressure Vessels

Fabrication & Assembly of Process Skids & Modules

Pipe Spool Fabrication

Shell and Tube Heat Exchanger Fabrication

Welding & Fabrication:

700+Welding procedures using various welding techniques including GTAW, GMAW, SMAW, SAW, FCAW and Automatic GTAW (Orbital) Welding of exotic materials such as Alloy 625, Alloy 825, 6 Mo, SDSS, DSS, SS316, Low Alloy Steel (P91, P22, P11), 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
  • Pressure Vessels
  • Columns / Towers
  • Shell & Tube Heat Exchangers
  • Steam Generators (OTSG and HRSG Modules)
  • 3 Phase / 2 Phase Separators
  • Deaerators
  • Scrubbers
  • Pig Launchers & Receivers
  • Test Separators /Steam Separators
  • Fuel Gas Separators / Cyclone Separators
  • Multimedia Filters (MMF) / Sand Filters
  • Nutshell Filters / Coalescer Filters
  • Desalters / Desanders
  • Piping pre-fabrication
  • Skid packages for Gas Treatment
  • Metering Skids
  • Cyclic Steam Services Manifolds
  • Various Pressure Equipment for Water Treatment Plant
  • Storage Tanks of API 650 / EN BS14015 / EN 12285
  • Well head hook up skids
  • Manifold Skids for Water, Oil and Gas
  • Multiport Selector Valves (MSV) skids
  • Chemical Injection Skids
  • Fuel Gas conditioning skids
  • Strainers / Filters
  • Orifice plates and Orifice Assemblies
Special Achievements
  • Fabrication of HRSG / OTSG – First time in Oman
  • Manufactured & Supplied process equipment with more than 46 meter in length
  • Manufactured and Supplied 143+6, 153+6, 162+6 mm heavy thick Clad vessel to PDO, Oman
  • Manufactured and Delivered largest column for PDO, Oman
  • Delivered more than 50 clad/weldoverlaid vessels
  • Delivered more than 40 nos. of ASME Sec. VIII Div. 2, U2 stamped heavy pressure vessels
  • Delivered more than 700 skid packages for various applications for the Oil & Gas Industry
  • Manufactured & Supplied process skids with height more than 9 meter in single unit
  • CRA/SDSS Piping Fabrication for Projects outside Oman
Workshop Facilities and Capabilities:

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