Oil & Gas Industry
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- Upstream Production Facilities:
Turkey’s oil and gas exploration and production activities, led by TPAO (Turkish Petroleum Corporation), concentrate in southeastern Anatolia fields including Batman, Diyarbakır, and Şırnak provinces, plus emerging offshore developments in the Black Sea requiring specialized flange solutions. Werner Flanges supplies ASTM A105 carbon steel flanges in Class 600# and 900# for wellhead connections, Christmas tree assemblies, production manifolds, and gathering line systems handling crude oil and associated gas at pressures ranging from 30-100 bar.
Black Sea offshore development projects utilize ASTM A350 LF2 flanges for subsea applications where water depths reach 2,000+ meters and seabed temperatures approach 4-6°C, requiring low-temperature impact-tested materials preventing brittle fracture. Corrosion-resistant coating systems including fusion-bonded epoxy or thermal-spray aluminum protect carbon steel flanges from marine environments accelerating degradation through chloride exposure and cathodic protection systems.
Midstream Transportation & Processing:
BOTAŞ operates Turkey’s extensive natural gas transmission network exceeding 15,000 kilometers of high-pressure pipelines crossing diverse geography from eastern borders (Iranian and Azerbaijani entry points) to western consumption centers serving Istanbul, Ankara, İzmir, and Bursa. Main transmission lines utilize Class 600# and 900# ASTM A694 F60 and F65 carbon steel flanges at compressor stations, metering points, pig launcher/receiver installations, and block valve assemblies operating at pressures up to 70 bar.
The Trans-Anatolian Natural Gas Pipeline (TANAP), transporting Azerbaijani gas through Turkey to European markets, represents one of Turkey’s most significant energy infrastructure projects requiring thousands of large-diameter, high-pressure flanges for station piping, launcher and receiver facilities, and export metering systems. Carbon steel flanges in sizes from 2″ through 36″ with pressure classes from 300# through 1500# accommodate the project’s varying service conditions across Turkey’s 1,850-kilometer route.
Downstream Refining Operations:
TÜPRAŞ operates four refineries with combined capacity of 28.1 million tons per year at İzmit (Kocaeli), Batman, İzmir (Aliağa), and Kırıkkale, processing crude oil into gasoline, diesel, jet fuel, LPG, and petrochemical feedstocks. These complex facilities utilize tens of thousands of carbon steel flanges across atmospheric and vacuum distillation units, catalytic cracking and reforming processes, hydrotreating units, and product blending and storage systems.
High-temperature applications including crude furnace outlet piping (380-400°C), catalytic reformer reactors (480-520°C requiring upgraded materials beyond carbon steel), and fractionator overhead systems utilize ASTM A105 Class 300# and 600# carbon steel flanges heat-treated to optimize high-temperature strength. Lower-temperature services including crude desalting, product cooling, and storage tank connections employ Class 150# and 300# flanges providing economical solutions for moderate pressure and temperature conditions.
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Petrochemical & Chemical Processing
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- Petkim Petrochemical Complex:
Located in Aliağa near İzmir, Petkim represents Turkey’s largest integrated petrochemical facility producing ethylene, polyethylene, PVC, and derivative products from naphtha feedstock. The ethylene cracker, polymerization units, and derivative production facilities utilize extensive carbon steel piping requiring ASTM A105 flanges in Class 150# through 900# depending on service pressure and temperature conditions.
Ethylene and propylene service at cryogenic temperatures down to -104°C necessitates ASTM A350 LF2 material selection, while polymer slurry handling in polyethylene and polypropylene plants employs standard A105 flanges with specialized coating systems preventing polymer buildup. Caustic handling systems and chlorine service in PVC production require careful consideration of corrosion mechanisms, with carbon steel suitable for certain concentrations and temperatures but requiring material upgrades for more aggressive conditions.
Chemical Manufacturing Facilities:
Turkey’s chemical industry concentrated in Kocaeli, Gebze, and İzmir industrial zones produces fertilizers, industrial chemicals, specialty chemicals, and pharmaceuticals requiring diverse flange solutions. Fertilizer plants processing ammonia, urea, and complex fertilizer formulations utilize Class 300# and 600# carbon steel flanges in synthesis gas preparation, ammonia converter systems, and product crystallization circuits.
Mineral acid production (sulfuric acid, hydrochloric acid, nitric acid) generally requires corrosion-resistant materials beyond carbon steel’s capabilities, but supporting services including cooling water, compressed air, steam, and dilute chemical handling employ ASTM A105 flanges providing economical solutions. Pharmaceutical facilities in Kocaeli Organized Industrial Zone utilize carbon steel flanges for utilities and non-product-contact services, with sanitary stainless steel flanges reserved for product-contact applications requiring cleanability and corrosion resistance.
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Power Generation
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- Coal-Fired Power Plants:
Turkey’s coal-fired generation capacity exceeding 19,000 MW concentrated along coastal regions (Soma-Afşin, Çatalağzı, İskenderun) requires extensive carbon steel piping for boiler systems, steam distribution, condensate return, cooling water, and ash handling. Main steam piping from boiler drums to turbine connections operates at supercritical conditions (25-30 MPa, 540-600°C) requiring alloy steel materials, but boiler feed water, condensate polishing, and cooling water services utilize ASTM A105 Class 300# and 600# carbon steel flanges.
Ash handling systems transporting bottom ash and fly ash slurries employ carbon steel flanges with erosion-resistant coatings or upgraded materials in areas experiencing high-velocity impingement. Flue gas desulfurization (FGD) systems mandated for environmental compliance handle corrosive environments where carbon steel may be suitable for outer zones but require corrosion-resistant alloys for limestone slurry contact areas.
Natural Gas Combined-Cycle Plants:
Turkey’s expanding NGCC capacity leveraging abundant natural gas supplies from diverse sources (Russia, Azerbaijan, Iran, LNG imports) employs modern high-efficiency combined-cycle technology requiring carbon steel flanges for fuel gas supply, HRSG (heat recovery steam generator) systems, and auxiliary services. Fuel gas pressure reduction stations utilize Class 300# through 900# carbon steel flanges depending on upstream pipeline pressure, with stringent leak detection and safety requirements driving quality specification.
HRSG systems generating steam from gas turbine exhaust gases utilize ASTM A105 flanges in economizer, evaporator, and superheater sections operating across temperature ranges from 150-540°C at pressures from 5-160 bar. Steam turbine extraction lines, condensate systems, and auxiliary steam services employ Class 150# and 300# carbon steel flanges providing reliable, economical solutions for moderate service conditions.
Renewable Energy Infrastructure:
Turkey’s ambitious renewable energy expansion including wind farms, hydroelectric projects, and emerging solar thermal installations requires carbon steel flanges for hydraulic systems, cooling circuits, and auxiliary services. Hydroelectric plants on the Euphrates, Tigris, Çoruh, and smaller rivers utilize Class 150# and 300# carbon steel flanges in turbine cooling water, lubrication systems, and powerhouse services supporting generation equipment.
Geothermal power development in western Turkey’s geothermal belt (Aydın, Denizli, Manisa provinces) utilizes ASTM A105 flanges in binary cycle systems, cooling towers, and non-geothermal-fluid-contact services, with corrosion-resistant materials reserved for direct geothermal fluid handling containing dissolved minerals and gases accelerating carbon steel degradation.
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Water & Wastewater Treatment
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- Municipal Water Distribution:
Turkish metropolitan municipalities including İSKİ (Istanbul Water and Sewerage Administration), İZSU (İzmir Water and Sewerage), and ASKİ (Ankara Water and Sewerage) operate extensive water treatment and distribution networks serving populations exceeding 16 million in Istanbul alone. Class 150# ASTM A105 carbon steel flanges connect large-diameter transmission mains, pumping station piping, and treatment plant process equipment handling potable water at pressures typically 4-10 bar.
Ductile iron piping with mechanical or flanged joints dominates water distribution networks due to corrosion resistance and installation economics, but pumping stations, valve chambers, and treatment facilities utilize carbon steel piping with flanged connections coated internally and externally for corrosion protection. Epoxy coating systems, cement mortar linings, or fusion-bonded epoxy provide long-term protection against internal corrosion from chlorinated water and external corrosion from soil conditions.
Wastewater Collection & Treatment:
Wastewater treatment facilities processing municipal sewage, industrial effluent, and combined flows utilize ASTM A105 carbon steel flanges for non-submerged applications including blower discharge piping (aeration air), sludge pumping systems, chemical feed systems (coagulants, flocculants, disinfectants), and effluent discharge lines. Submerged applications or those contacting raw sewage typically employ corrosion-resistant materials, but supporting services and above-ground installations find carbon steel economical with appropriate coating protection.
Advanced treatment processes including membrane bioreactor (MBR) systems installed at Turkish coastal resorts and industrial wastewater treatment employing chemical oxidation, activated carbon, or specialized treatment methods utilize carbon steel flanges for pressurized air systems, clean water services, and chemical handling compatible with carbon steel materials.
Desalination Facilities (Coastal Regions):
Although less prevalent in Turkey compared to neighboring Middle Eastern countries, desalination facilities serving coastal resorts, islands, and industrial facilities utilize carbon steel flanges in non-seawater-contact services including boiler feed water, steam systems (multi-stage flash distillation), and post-treatment chemical dosing. Seawater intake, brine discharge, and desalinated water contact applications require corrosion-resistant materials beyond carbon steel capabilities, but supporting utilities and power generation systems employ ASTM A105 flanges.
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