Titanium - flange

Three most commonly used titanium flange grades:

1. Gr2 (Industrial pure titanium)

◦ Applications: General corrosion resistance, seawater, brine, weak acids and alkalis, most chemical media

◦ Temperature: -196℃～315℃

◦ Most commonly used, highest cost-performance ratio

2. Gr7 (Ti-0.2Pd) Palladium titanium

◦ Applications: Strong reducing acids (dilute hydrochloric acid, dilute sulfuric acid, wet chlorine)

◦ More corrosion resistant than TA2, does not absorb hydrogen, does not become brittle

◦ Essential for chlor-alkali, pickling, and PTA applications3. Gr12 (Ti-0.3Mo-0.8Ni)

◦ Applications: Medium-strong acids, high temperature, crevice corrosion

◦ More resistant to high temperature and crevice corrosion than TA9

◦ Commonly used in petrochemical, high-temperature brine, and seawater desalination industries

II. Industry-specific recommendations:

1. Chlor-alkali/Chemical (wet chlorine, hydrochloric acid, brine)

• Recommended grade: Gr7 1. **Preferred:** Gr2

• Flange Type:

◦ Piping Connection: Plate Welded Flange (PL)

◦ Equipment Port/High Pressure: Weld Neck Flange (WN)

◦ Sealing Face: Raised Face (RF) / Raised Face (MFM)

2. **Seawater, Seawater Desalination, Offshore Platforms:**

• Grade: Gr2 or Gr12

• Type:

◦ Seawater Piping: PL Plate Welded Flange

◦ High Pressure/Large Diameter: WN Weld Neck Flange

◦ Sealing: RF Raised Face

3. **Oil & Gas, Hydrogen Sulfide Containing, High Salt

• Grade: Gr12

• Type:

◦ High Pressure: WN Weld Neck Flange

◦ Sealing: RJ Ring Joint (High Pressure) or MFM Raised Face

4. **Pharmaceuticals, Food, Pure Water, High Cleanliness:**

• Grade: Gr2

• Type:

◦ Sanitary Grade: Quick-Connect Flange / Flat Plate Flange

◦ General Piping: PL Flat Welding

5. Vacuum, High Temperature, Heat Exchangers

• Grade: Gr2

• Type: WN Neck Welded Plate or SO Neck Flat Welded Plate
III. How to Choose Flange Type (Simplest Rule of thumb)

• Low Pressure, Normal Temperature, General Piping → PL Plate Flat Welding Titanium Flange

• High Pressure, High Temperature, Equipment Pipelines → WN Neck Welded Plate Titanium Flange

• High Pressure, High Toxic/Flammable/Explosive → WN + RJ Ring Connection

• Cleanroom, Medical → Sanitary Quick-Installation/Flat Plate

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Titanium flanges offer key advantages: superior corrosion resistance, high strength and lightweight design, high temperature resistance, and fatigue resistance, making them ideal for pipe and equipment connections in highly corrosive, high-temperature, high-pressure, and extreme operating conditions.

I. Chemical Industry/Chlor-Alkali (Most Mainstream)

• Chlor-alkali electrolyzers, brine/wet chlorine/hydrochloric acid pipelines, PTA units, fine chemical reactors

• Vacuum salt production, flue gas desulfurization (strong acid/high chloride ion)

• Resistant to pitting/stress corrosion, service life several times longer than stainless steel

II. Oil/Natural Gas/Refining

• Sulfur-containing crude oil processing, oil and gas extraction, offshore platforms, sulfur-containing wastewater pipelines

• High temperature and high pressure (180℃/3.5MPa), high salinity/hydrogen sulfide environment

III. Marine Engineering/Shipbuilding/Seawater Desalination

• Seawater pipelines, deep-sea drilling platforms, submarine pressure hulls, seawater desalination units

• Resistant to seawater/salt spray, anti-biofouling, deep-sea high pressure (≥100MPa)

IV. Energy/Nuclear Power/New Energy

• Nuclear reactor cooling systems, nuclear waste treatment (radiation resistant/high temperature resistant)

• Hydrogen energy storage and transportation, solar thermal/photovoltaic, marine propulsion systems

V. Aerospace/Military Industry

• Aircraft hydraulic/fuel/engine piping, rocket propellant systems, satellite piping

• Lightweight + high strength, significant weight reduction

VI. Pharmaceutical/Food/Precision Instruments

• Pharmaceutical pure water/sterile piping, bioreactors, food-grade fluid systems (biocompatible)

• High cleanliness, no leaching, corrosion resistance

VII. Other Extreme Operating Conditions

• High temperature and high pressure equipment, vacuum systems, pump and valve matching, corrosive medium storage tank inlets

Quality Control and Testing

Each product undergoes rigorous inspection before shipment:

Dimensional Inspection: Precise measurement of thickness, length, and width

Chemical Composition and Mechanical Property Analysis: Third-party testing reports

Surface Inspection: Visual and microscopic inspection for defects

Ultrasonic Testing: Detection of internal defects

Why Choose Us

Technology and Quality: Located in Baoji, China's Titanium Valley, we possess professional production technology and extensive experience in non-ferrous metal manufacturing.

Global Coverage: We provide consistently high-quality products to customers in Australia, South Korea, Germany, the USA, the UK, Malaysia, and the Middle East.

Quality Commitment: We never compromise on quality and are responsible for every product we manufacture.

Technical Support: We have professional personnel overseeing the entire process from raw materials to finished products!

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

Email: lucky@bjfreelong.com

WhatsApp: +86  13335371763

Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.