Flanges for Petrochemical & Chemical Processing
Exotic alloy solutions engineered for corrosive media, high temperatures, and aggressive chemical environments. Inconel, Monel, Hastelloy, and duplex stainless configurations.
Material Science for Extreme Corrosion
Chemical processing demands uncompromising material selection. ApiFlange specializes in exotic alloys engineered to withstand corrosive media, high temperatures, and aggressive chemical environments that would compromise standard carbon or stainless steel. From caustic soda to sulfuric acid, chlorine gas to hydrofluoric acid, our exotic alloy flanges deliver the durability, reliability, and leak-free sealing required by the world's most demanding petrochemical facilities.
Exotic Alloys
Inconel, Monel, Hastelloy
Corrosion Proof
Extreme acid/base
High Temp
500-1500°F+
RTJ Gaskets
Zero leakage design
Exotic Materials for Chemical Compatibility
Petrochemical plants process hundreds of different chemical streams. ApiFlange maintains expertise in material selection, offering comprehensive options for every corrosive environment.
Stainless & Duplex Steels
304/304L
General corrosion resistance
316/316L
Superior pitting resistance
317L
Extra molybdenum enhancement
Duplex 2205
High strength, chloride resistance
Super Duplex 2507
Extreme corrosion environments
Nickel & Superalloys
Inconel 600/625/718
High-temp, corrosion resistance
Monel 400/K-500
Seawater, fluorine compounds
Hastelloy C-276
Severe chemical attack
Hastelloy B-3
Hydrochloric acid service
Titanium Gr. 2/5
Seawater, aqua regia
Common Petrochemical Applications
Acid Services
- •Sulfuric acid plants
- •Hydrochloric acid handling
- •Phosphoric acid processing
- •Nitric acid systems
- •Organic acid synthesis
Alkali Services
- •Caustic soda (NaOH)
- •Sodium hypochlorite
- •Ammonia synthesis
- •Potassium chloride
- •Liquid ammonia storage
Specialized Chemicals
- •Chlorine gas handling
- •Fluorine compounds
- •Hydrogen peroxide
- •Organic solvents
- •Hydrocarbon blending
Polymer Processing
- •Polymerization reactors
- •Catalyst feed systems
- •Product recovery
- •Solvent recirculation
- •Heat exchange loops
Pressure & Temperature Ratings
Petrochemical applications frequently involve aggressive combinations of pressure, temperature, and chemical attack. Our exotic alloy flanges are engineered and tested for these demanding conditions.
Pressure Range
150-2500 psi
All ASME classes
Temperature Range
-50°F to 1500°F
Material dependent
Sealing Options
RTJ/RF/FF
Full range available
RTJ Gaskets & Sealing Solutions
High-pressure petrochemical service demands superior gasket solutions. Ring Type Joint (RTJ) gaskets provide zero-leakage sealing while metal and metal composite gaskets offer chemical compatibility with exotic alloy flanges.
Metal Gaskets
- •Soft iron (RTJ standard)
- •Stainless steel 316
- •Monel metal gaskets
- •Inconel gaskets
- •Tantalum gaskets (specialty)
Composite Solutions
- •Spiral-wound with metal rings
- •Ptfe-backed graphite
- •Elastomer + graphite blends
- •PTFE jacketed gaskets
- •Corrugated metal gaskets
Engineering Support
Selecting the right material for your specific chemical environment is critical. Our engineering team can provide:
Chemical compatibility analysis for your specific fluid stream
Corrosion rate estimation based on temperature and concentration
Material selection guidance balancing cost and performance
Gasket material recommendations for fluid compatibility
Pressure/temperature derating calculations for exotic alloys
Design and fabrication of custom flange configurations
Need Material Selection Guidance?
Our chemical process specialists can help identify the ideal material for your specific corrosive environment and operating conditions.