Titanium Flanges

Our Titanium Flanges are professional-grade high-performance piping connection components, manufactured in strict compliance with international standards including ASTM B381 (core standard for titanium and titanium alloy forgings), ASME B16.5, ASME B16.47, NACE MR0175/ISO 15156, DIN 2633, JIS B2220, and GB/T 9119. As a direct manufacturer with 17+ years of titanium processing experience, we produce a full range of forged titanium flanges using vacuum double-melted (VIM+VAR) raw materials, ensuring ultra-low impurity content, uniform microstructure, and stable mechanical properties.

1. Full Global Standard Coverage, Perfect Piping Compatibility : 

- Manufactured in strict accordance with all mainstream international flange standards: ASME B16.5 (Class 150 to Class 2500), ASME B16.47 Series A/B (large diameter), DIN, JIS, EN, and GB standards. 100% dimensionally compatible with matching pipes, valves, and equipment from global mainstream brands, ensuring seamless on-site installation.

- Full range of flange types available: Weld Neck (WN), Slip On (SO), Blind (BL), Socket Weld (SW), Lap Joint (LJ), Threaded (TH), Spectacle Blind, Orifice, and Reducing Flanges, covering all industrial piping connection scenarios.

2. Full Titanium Grade System, Ultimate Corrosion Resistance : 

- Full range of commercial titanium grades available: commercially pure titanium GR1, GR2, GR3, GR4; high-performance titanium alloys GR5 (Ti-6Al-4V), GR7 (Ti-0.2Pd), GR9 (Ti-3Al-2.5V), GR12 (Ti-0.3Mo-0.8Ni), and medical-grade GR23 (Ti-6Al-4V ELI).

- Natural excellent corrosion resistance: immune to seawater, chloride ions, oxidizing acids, organic acids, alkalis, and most corrosive media, with a service life of over 30 years in marine and chemical environments, solving the core pain point of frequent corrosion leakage and replacement of stainless steel and carbon steel flanges.

- GR7 and GR12 grades are optimized for crevice corrosion and high-temperature corrosion, outperforming pure titanium in high-temperature high-chloride and reducing acid environments, fully compliant with NACE MR0175/ISO 15156 for sour oil and gas service.

3. Precision Dimensional Control, Zero-Leakage Sealing Performance : 

- Strict dimensional tolerance control in full compliance with ASME B16.5 standards:

 - Sealing face flatness: ≤0.05mm

 - Bolt hole circle diameter tolerance: ±0.1mm

 - Bolt hole position tolerance: ±0.05mm

 - Perpendicularity between hub and flange face: ≤0.1mm

- Full range of sealing face types available: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female (M/F), Tongue & Groove (T/G), ensuring 100% fit with gaskets and matching flanges, eliminating pipeline leakage risks even under high pressure and alternating load conditions.

4. 100% Non-Destructive Testing, Zero-Defect Quality Assurance : 

- Every flange undergoes full-process quality inspection, with mandatory non-destructive testing (NDT) in strict accordance with ASTM standards:

 - 100% Penetrant Testing (PT) for all products (ASTM E165), to detect surface micro-cracks, pores, and other defects.

- 100% Ultrasonic Testing (UT) for all Weld Neck, Blind, and high-pressure flanges (ASTM E237), to detect internal inclusions, cracks, and segregation.

- Radiographic Testing (RT) for welds of welded flanges (ASTM E1032), to ensure weld quality.

- Batch mandatory testing includes hydrostatic pressure test (1.5 times the rated working pressure, no leakage or deformation allowed), chemical composition analysis (direct reading spectrometer + ICP), mechanical property testing (tensile strength, yield strength, hardness), and intergranular corrosion testing.

- Each flange is marked with a unique heat number and serial number, with a complete Material Test Report (MTR) and NDT test reports provided for every order, supporting third-party SGS/TUV/BV inspection and certification.

5. Superior Mechanical Performance & Structural Stability : 

- Closed-die forging process with strict control of forging temperature and reduction ratio, refining grains, eliminating casting defects, and improving material density. The forging ratio is not less than 3:1, ensuring the flange has excellent mechanical properties and fatigue resistance.

- Precision vacuum heat treatment process eliminates forging stress, optimizes microstructure, and ensures dimensional stability under high temperature and high pressure. The maximum working temperature can reach 550℃ (for titanium alloy grades), and the rated working pressure can reach 42MPa (Class 2500).

- Excellent weldability: The hub of Weld Neck flanges is designed with a standard 37.5°±1° butt weld bevel, with excellent weldability matching titanium pipes. The weld joint strength can reach more than 90% of the base metal, without pores, cracks, and other welding defects.

6. Lightweight Design, Low Installation & Lifecycle Cost : 

- The ultra-low density of titanium (4.51g/cm³, only 60% of stainless steel) greatly reduces the overall weight of the piping system, reduces the support load, and lowers the labor and equipment costs of hoisting and installation, especially for large-diameter and high-altitude piping projects.

- Excellent corrosion resistance eliminates the need for frequent replacement of flanges due to corrosion, greatly reducing the long-term operation and maintenance costs of the piping system, with significant life cycle cost advantages over stainless steel and alloy flanges.

Full Closed-Loop Manufacturing Process : 

- High-Purity Raw Material Control 

Only vacuum double-melted (VIM+VAR) titanium and titanium alloy ingots compliant with ASTM B381 and ASTM B265 standards are used. Each batch of raw materials is subject to chemical composition analysis and mechanical property testing to prevent unqualified raw materials from entering production.

- Precision Forging

 - Closed-die forging on a 1000-8000 ton hydraulic press, with strict control of forging temperature (850-950℃) and forging ratio (not less than 3:1), to break the cast structure, refine grains, improve material density, and eliminate internal defects.

 - Free forging for large-diameter and non-standard flanges, with multi-directional forging to ensure uniform structure and mechanical properties in all directions.

- Precision Heat Treatment

Vacuum heat treatment furnace is used for annealing, solution treatment, and aging treatment. The temperature and holding time are precisely controlled to eliminate forging stress, optimize the microstructure, and ensure the mechanical properties and dimensional stability of the flange, avoiding deformation and cracking during use.

- CNC Precision Machining

5-axis CNC machining centers and CNC lathes are used for precision machining of the flange face, bolt holes, hub, and weld bevel, with strict dimensional tolerance control to ensure the flatness of the sealing face, the accuracy of bolt hole positions, and the perpendicularity of the hub. The sealing face can be polished to Ra 0.8μm for high-purity and high-vacuum applications.

- Surface Treatment

 - Standard surface treatment: Pickling + passivation treatment, forming a dense titanium oxide protective film to improve corrosion resistance, with no oil, oxide scale, or burrs on the surface.

 - Optional surface treatment: Mirror polishing, sandblasting, anodizing, PTFE coating, adapting to clean, high wear-resistant, strong corrosion and other special working conditions.

- Full-Process Non-Destructive Testing & Quality Inspection

 - Raw material incoming inspection: Chemical composition analysis, mechanical property testing, metallographic structure inspection.

 - In-process inspection: Forging size inspection, heat treatment hardness testing, dimensional accuracy inspection.

 - Finished product 100% non-destructive testing: Penetrant Testing (PT), Ultrasonic Testing (UT), hydrostatic pressure test.

 - Batch sampling inspection: Intergranular corrosion test, weld Radiographic Testing (RT), salt spray corrosion test.

 - Each batch of products is issued with a complete Material Test Report (MTR), including chemical composition, mechanical properties, NDT results, heat treatment records, to achieve full traceability of the whole process.

- Chemical & Petrochemical Industry : 

Acid and alkali medium transmission piping, chlor-alkali chemical equipment, hydrometallurgy pipelines, flue gas desulfurization (FGD) systems, pesticide/fertilizer production lines, and organic solvent transmission systems. Our titanium flanges are immune to corrosion from sulfuric acid, hydrochloric acid, nitric acid, sodium hydroxide, and chloride ions, solving the core pain point of frequent corrosion leakage and shutdown maintenance of stainless steel and carbon steel piping systems.

-  Offshore Oil & Gas & Marine Engineering : 

Offshore oil and gas platform gathering and transportation pipelines, subsea production systems, ship ballast water systems, seawater desalination equipment, coastal power plant circulating water pipelines, and marine observation equipment piping. Excellent seawater corrosion resistance and marine biofouling resistance, with a service life of more than 30 years in marine environments without frequent anti-corrosion maintenance, fully compliant with NACE MR0175/ISO 15156 for sour service.

- Pharmaceutical & Food Processing Industry : 

Pharmaceutical clean piping systems, biopharmaceutical fermentation equipment, food and beverage production and transmission pipelines, drinking water/pure water equipment, and brewery piping systems. GR2/GR1 pure titanium is non-toxic, non-precipitating, compliant with FDA and EU food contact standards, and has excellent corrosion resistance to acid and alkali cleaning media, meeting GMP clean production requirements.

- New Energy & Semiconductor Industry : 

Lithium battery electrolyte transmission pipelines, hydrogen energy storage and transportation systems, photovoltaic equipment piping, semiconductor wafer cleaning equipment pipelines, and electronic chemical transmission systems. Excellent corrosion resistance to high-purity chemicals, no metal ion precipitation, no pollution to the medium, meeting the transmission requirements of high-purity electronic grade media.

- Aerospace & Defense Industry :

Aircraft hydraulic piping systems, engine fuel transmission pipelines, military equipment special piping systems, satellite/spacecraft pipeline connections. GR5/GR9 titanium alloy has an ultra-high strength-to-weight ratio, high temperature resistance and fatigue resistance, which greatly reduces the weight of equipment and improves load capacity, fully compliant with AMS aerospace material standards.

- Water Treatment & Environmental Protection :

Seawater desalination plants, industrial wastewater treatment systems, brine treatment equipment, and municipal water supply piping. Immune to chloride ion corrosion and microbial corrosion, with a long service life and low maintenance costs, it is the ideal material for desalination and wastewater treatment piping systems.

Q: What international standards do your Titanium Flanges comply with?

A: Our Titanium Flanges are manufactured in strict compliance with global mainstream standards, including ASTM B381 (Standard Specification for Titanium and Titanium Alloy Forgings, the core material standard for titanium flanges), ASME B16.5 (Pipe Flanges and Flanged Fittings), ASME B16.47 (Large Diameter Steel Flanges), NACE MR0175/ISO 15156 (Sour Oil and Gas Service Standard), DIN 2633, JIS B2220, and EN 1092-1. We also support custom production according to your drawings and non-standard requirements, ensuring 100% compatibility with your piping system.

Q: Which titanium grade should I choose for my application?

A: The grade selection depends on your working medium, temperature, pressure, and corrosion environment:

- For general seawater, water treatment, food/pharmaceutical applications: GR2 is the most cost-effective and widely used choice, with excellent general corrosion resistance and good weldability.

- For harsh reducing acid, high-temperature high-chloride environments with high risk of crevice corrosion: GR7 is the optimal choice, with palladium addition to significantly improve corrosion resistance.

- For high-pressure, high-temperature, and high-load structural piping: GR5 (Ti-6Al-4V) high-strength titanium alloy is recommended.

- For high-temperature geothermal and moderate corrosion applications: GR12 offers excellent performance at a lower cost than GR7.

- For pharmaceutical and biopharmaceutical clean piping: GR2 or medical-grade GR23 is recommended, compliant with FDA and GMP requirements.Our technical team can provide professional grade selection guidance based on your specific working conditions.

Q: What non-destructive testing (NDT) do you perform on the Titanium Flanges? Can you provide test reports?

A: We implement 100% full inspection for every Titanium Flange, with mandatory NDT items including:

- Penetrant Testing (PT) : 100% PT for all flanges in accordance with ASTM E165, to detect surface cracks, pores, and other micro defects.

- Ultrasonic Testing (UT) : 100% UT for all Weld Neck, Blind, and high-pressure flanges in accordance with ASTM E237, to detect internal inclusions, cracks, and segregation.

- Hydrostatic Pressure Test : 1.5 times the rated working pressure hydrostatic test for each batch, no leakage or deformation allowed.

- Radiographic Testing (RT) : For welded flanges, 100% RT is performed on the welds in accordance with ASTM E1032.Every order will be provided with a complete Material Test Report (MTR) and NDT test reports, and third-party SGS/TUV/BV certification is also available upon request.

Q: What is your minimum order quantity (MOQ) for Titanium Flanges? Do you provide samples?

A: We have a very flexible MOQ to meet your different needs:

- For standard in-stock specifications (GR2, NPS 1/2" to 12", Class 150/300): 1 piece minimum order, supporting sample orders and small batch trial use.

- For custom sizes, non-standard grades, and large-diameter flanges: the MOQ is 5 pieces, which can be negotiated and reduced for special cases.

- Free samples: We can provide free sample pieces of standard specifications for you to test dimensional fit, material properties, and sealing performance; you only need to cover the international shipping cost. Custom samples can be provided at cost price.

Q: Can you provide custom Titanium Flanges according to our drawings?

A: Yes, we provide full custom manufacturing services to meet your personalized needs:

- Custom dimensions: non-standard nominal size, wall thickness, hub length, bolt hole quantity/size/position, and sealing face design.

- Custom material: special titanium alloy grades, composite titanium materials, and titanium clad flanges.

- Custom processing: special bevel form, mirror polishing of sealing face, threaded connection, and other special machining requirements according to your drawings.Our engineering team will review your drawings and provide professional optimization suggestions, and we can provide prototype production before mass production to ensure the product fully meets your requirements.

Q: What is the lead time for standard and custom orders?

A: The delivery time is distinguished according to the order type:

- Standard in-stock specifications (GR2, common sizes): delivery within 3-7 days after payment confirmation.

- Custom size/non-standard grade products: delivery within 10-15 days.

- Large-diameter custom flanges, bulk orders (≥100 pieces), and special certified products: delivery within 15-25 days.

- Urgent orders: We have a dedicated expedited production line, which can shorten the delivery time to 2-5 days for small batch urgent orders to meet your project schedule.

Q: Are your Titanium Flanges weldable? What welding process do you recommend?

A: Yes, all our Titanium Flanges have excellent weldability, as we use vacuum double-melted raw materials with ultra-low impurity content and uniform microstructure. The recommended welding process is GTAW (TIG) Welding (Tungsten Inert Gas Welding) with high-purity argon shielding (purity ≥99.999%) on both the front and back of the weld, using matching grade titanium welding wire. This ensures that the weld joint strength reaches more than 90% of the base metal, without pores, cracks, or oxidation defects. We can provide detailed welding parameter guidelines and matching welding wire recommendations with your order, as well as welding technical support.

Q: What is the difference between Titanium Flanges and Stainless Steel Flanges?

A: Our Titanium Flanges have irreplaceable core advantages over stainless steel (304/316L) flanges:

- Superior Corrosion Resistance : Titanium is immune to chloride ion corrosion, seawater corrosion, and most acid and alkali media, while 316L stainless steel is prone to pitting and crevice corrosion in chloride and high-temperature environments. The service life of titanium flanges is 5-10 times that of stainless steel flanges in harsh corrosive environments.

- Ultra-Lightweight : The density of titanium is only 4.51g/cm³, 60% of stainless steel, which greatly reduces the weight of the piping system, lowers installation labor costs, and reduces the load on piping supports.

- Better Temperature Stability : Titanium flanges can maintain stable mechanical properties at -253℃ to 550℃, while stainless steel has reduced corrosion resistance and strength at high temperatures above 300℃.

- Excellent Biocompatibility : Titanium is non-toxic and non-precipitating, compliant with FDA food contact standards, making it ideal for pharmaceutical, food, and biopharmaceutical applications where stainless steel may precipitate heavy metal ions.While the initial procurement cost of titanium flanges is higher, their long service life and low maintenance costs result in a significantly lower total lifecycle cost than stainless steel flanges in corrosive environments.

Q: Do your Titanium Flanges comply with NACE MR0175 for sour oil and gas service?

A: Yes, our GR2, GR7, GR12, and GR5 titanium flanges are fully compliant with NACE MR0175/ISO 15156 (Petroleum and Natural Gas Industries - Materials for Use in H2S-Containing Environments in Oil and Gas Production). Our titanium flanges have excellent resistance to sulfide stress corrosion cracking (SSCC) and hydrogen-induced cracking (HIC), making them ideal for sour oil and gas production, offshore platforms, and high-sulfur natural gas transmission pipelines. We can provide NACE compliance test reports and certification upon request.

Q: What payment terms do you accept for international orders?

A: We accept standard international trade payment terms:

- T/T (Telegraphic Transfer): 30% deposit in advance, 70% balance before shipment.

- Irrevocable L/C at sight for bulk orders over 50,000 USD.

- Alibaba Trade Assurance (100% payment protection for buyers).

- For long-term cooperative partners with good credit, we can offer more flexible payment terms.

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