About Çiltuğ

Çiltuğ Inc. has been playing a major role in the Heavy Engineering, Hydropower Engineering & Hydroelectric Design at both domestic and international scale. Today, Çiltuğ Inc. is a regional leader regarding large HEPP, WPP and infrastructure projects thanks to its highly experienced staff and carefully cultivated corporate culture.

Çiltuğ Inc. provides design, building, maintenance and consultancy services with the aim of becoming the most preferred solution partner in the energy sector.

Çiltuğ Inc. has been established on May 15th, 1971 in Gaziantep as a collective company and became a joint stock company as of April 1st, 1976. Development and modernization procedures of the company were completed in 1977, developed and became group of companies since 1980.

We operate two factories:

  • Our Heavy Machinery and Steel Structure Factory established on 10,000 sqm. covered area and 7,000 sqm. outdoor area,
  • Our Wind Tower and Accessories Construction Factory is established on 5,000 sqm. covered area and 32,000 sqm. outdoor area.

Both of these factories are located within the 1st Industrial Zone of Gaziantep city in South-East of Turkey where 220 km away from Iskenderun Sea port and 280 km away from Mersin Seaport with conjunction of TEM motorway.

All workshop fabrication and erection works are achieved by our well-experienced technical personnel under the international Quality Management Systems ISO 9001:2015. In addition to this standard, our technical team is equipped with EN ISO 3834-2 Fusion Welding of Metallic Materials Management Quality Requirements System, EN 1090-1:2009+A1:2011 Technical Requirements fort he Execution of Steel Structures System, ASME U&S Stamp and Health & Safety Equipment Certifications with ISO 14001:2015 & OHSAS 18001:2007.

Both of our workshop engineers are certified for the NDT Tests Level-2 under the EN ISO 9712 or SNT-TC-1A Standards by independent & accredited authorities. All welders have test certificates under the EN ISO 9606-1 Standards.

Çiltuğ Inc. in numbers

32.000 m2

Outdoor area

17.000 m2

Indoor area

15.000 tons

Welded & Machined Components / YR

10.000 tons

Wind Tower & Frames / YR


Administrative & Technıcal Staff


Blue Collar Employees

What we do?

Our Manufacturing Capabilities

FOR HYDROELECTRIC POWER PLANTS (Fabrication and Erection Works);

  • Spillway radial gates with flap with hydraulic lifting equipment and stoplog gates,
  • Power intake fixed wheel gates, trashracks and trashrack cleaning machines,
  • Penstocks (high pressurized pipes), expansion and flexible joints for transmission and power lines,
  • Bifurcations, trifurcations and multiple branch-pipes for power lines,
  • Bottom outlet sliding gate valves, jet flow gate valves, radial gates,
  • Butterfly valves with counterweights and conical valves, Howell Bunger valves,
  • Spiral case and stayrings, draft tube, elbow and cones, inlet pipes,
  • Head Covers, bottom rings, gate operating rings and regulating rings for wicket gates for turbines,
  • Turbine housing and pit liners for Francis, Kaplan and Pelton Turbines,
  • Distributors, collectors and manifolds for Pelton Turbines,
  • Stator frames, rotor spiders, upper & lower brackets for generators,
  • Power house overhead cranes and gantry cranes,


  • PQR as per ASME SEC. IX
  • PQR as per EN ISO 15614
  • WPS as per ASME SEC. IX
  • WPS as per EN ISO 15609
  • Certifications for welders as per EN ISO 9606-1
  • Certifications for welders as per ASME SEC. IX
  • Certifications for welders as per AWS D1.1
  • Certifications for NDE inspectors as per EN ISO 9712
  • Certifications for NDE inspectors as per SNT-TC-1A


  • CUTTING; thickness: 300mm x width:3800mm x length: 22,000mm.
  • BENDING; thickness: 115mm x width:3050mm.
  • WELDING; thickness: 300mm.
  • MACHINING; workpiece up to:250ton, Dia:12,500mm, Height:6000mm. with 5-Axis CNC Mach.
  • HEAT TREATMENT; upto 1000 0C workpiece upto w:7Mt, L: 8mt, H: 5mt. for the furnace,
  • PORTABLE HEAT TREATMENT; upto 1000 0C for all workpieces,
  • PAINTING; workpieces are painted in a PLC Controlled cabin, width: 10mt length: 30,5mt high: 6,5mt,
  • METALIZING; Thickness up to 1000mic. Zinc Coating 40kg/hour. Aliminium 12kg/hour.


  • Steel wind towers,
  • Rotor houses,
  • Stator structures & base frames,
  • Generator Brake discs & Stator plates,
  • Turbine transportation frames,
  • Anchor cages c/w flanges and foundation rings,
  • Turbine Blade hubs,
  • Mechanical kit sets.


  • Turbine Housing and frames for Thermal and Gas Turbines, Steel welded constructions,
  • Pressurized vessels, steam boilers and boiler anchorages and boiler platforms,
  • Petroleum storage and process tanks.


  • Cylindrical Links and shells for Kiln,
  • Silo, hopper and cyclones,
  • Conveyor Lines.