Customized Titanium Blind Flange | High-Pressure Sealing Solutions for Extreme Environments

A customized titanium blind flange is a solid, non-standard disc component forged and precision-machined from titanium alloys to hermetically seal the end of piping systems, pressure vessels, or pump nozzles. Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, or Grade 23 titanium flanges are custom-made to your requirements and operational demands. Baoji Huacan offers sealing solutions that can survive the toughest conditions with over 10 years of titanium machining experience, 40+ CNC machines, and 1,000+ tonnes of annual production capacity.

Parameter	Details
Material Grades	Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23 (Ti-6Al-4V ELI)
Material Standard	ASTM B381 / ASME SB381
Design Standards	ANSI, ASME B16.5, DIN, ISO, JIS, or customer specifications
Flange Size (OD)	Fully customized according to drawings or project requirements (e.g., 200 mm reference size)
Thickness	Customized based on pressure rating, design requirements, and application
Pressure Rating	Class 150–2500+; high-pressure designs available up to 10,000 PSI (690 Bar)
Flange Face Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Tongue & Groove
Machining Features	Customized bolt holes, sealing surfaces, grooves, ports, and mounting features
Custom Connections	NPT/BSP threaded ports, sensor ports, instrument mounts, and special openings
Surface Finish	Machined finish, natural titanium finish, polished, anodized
Density	Approx. 4.51 g/cm³
Manufacturing Process	Forging, CNC machining, drilling, milling, and precision finishing
Inspection & Documentation	Material certificates (MTC), dimensional inspection reports, and traceability documents available

Titanium Flange

Zero Corrosion Allowance Titanium does not need any extra corrosion allowance thickness like steel, reducing material cost and weight.

High Strength-to-Weight Ratio: ~4.51 g/cm³ density; minimum Grade 5 yield strength of ≥828 MPa

Leak-Proof Sealing Design: Machined sealing faces provide a durable hermetic seal under cyclic pressure and thermal expansion.

Fatigue Resistance: Performs very well under high cycle vibrational loading environments such as pumping stations and offshore systems.

Biocompatibility: Non-toxic and suitable for pharmaceutical and food processing environments.

Product Comparison

Feature	Customized Titanium Blind Flange	Stainless Steel Blind Flange	Carbon Steel Blind Flange
Corrosion Resistance	Excellent resistance with stable TiO₂ passive oxide layer; suitable for seawater and chemical environments	Good corrosion resistance; depends on grade and media conditions	Lower corrosion resistance, especially in chloride and acidic environments
Weight Advantage	Approx. 45% lighter than steel alternatives	Heavier than titanium	Heavier than titanium
Pressure Capability	Custom designs available for high-pressure applications up to 10,000 PSI (690 Bar)	Available in standard ASME pressure classes	Available in standard ASME pressure classes
Service Life	Long service life in aggressive and corrosive environments	Long service life under suitable operating conditions	May require additional protection or maintenance in corrosive environments
Customization Capability	Full OEM/ODM support based on drawings, specifications, and applications	Standard sizes with limited customization options	Standard sizes with limited customization options
Biocompatibility	Excellent biocompatibility; suitable for medical and special applications	Depends on stainless steel grade	Generally not selected for biomedical applications
Typical Applications	Marine, chemical processing, offshore, aerospace, semiconductor, and high-performance systems	General industrial piping, food, chemical, and construction applications	Oil & gas, water systems, and general industrial piping

Solutions One

Titanium Flange application

Solutions One

Titanium Flange application

Solutions One

Titanium Flange Application

Solutions One

Titanium Flange application

Deepwater Oil & Gas: Custom blind flanges seal high-pressure subsea manifold lines in contact with sour gas (H₂S) and saltwater to avoid stress corrosion cracking that would soon break carbon steel.

Chemical & Chlor-Alkali Plants: tanks for wet chlorine gas and hypochlorite sealing – conditions which will damage stainless steel in weeks. Titanium gives decades of service life.

Desalination (SWRO): Used in high-pressure pumps and energy recovery devices handling high-velocity brine. Custom porting allows direct integration of instrumentation.

Aerospace Propulsion Testing: Seals vacuum chambers and fuel lines subjected to cryogenic temperatures (liquid hydrogen) without danger of brittle fracture.

Marine & Shipbuilding Best for saltwater pipe systems where biofouling resistance and extended service life are important.

Standard steel or stainless steel flanges often fail rapidly in aggressive media — wet chlorine, seawater, acidic fluids, and high-pressure sour gas environments. Titanium offers a proven alternative.

Titanium develops a naturally occurring TiO2 oxide film that is resistant to chloride pitting and crevice corrosion. Grade 5 titanium is 45% lighter than steel with yield strength of ≥828 MPa equivalent to high strength alloy steels.

Offshore platforms and subsea manifolds, as well as aeronautical systems, need this weight advantage to minimise topside bulk, which reduces operating costs and increases safety.

Each flange is manufactured using high purity titanium ingots generated by vacuum arc remelting (VAR) with good chemical uniformity and minimal amounts of impurities.

Then the disc is hot forged utilising our 4,000-ton hydraulic press, refining the grain structure and assuring outstanding mechanical integrity. Next is precision CNC machining to get close dimensional tolerances and clean sealing face finishes – generally Ra 3.2-6.3 μm to meet standard seal requirements.

Heat treatment (annealing per ASTM B381) is applied prior to machining to optimize the material's mechanical properties and dimensional stability.

Receiving Drawings

Annealing

Developing Machining Process

Finish Machining

Preparing Raw Materials

Deburring

Rough Machining

Deburring

Baoji Huacan has more than 40 high-precision CNC lathes and machining centers, including gantry systems for tiny and big size titanium parts.

Our forging line includes a 4,000-ton hydraulic press, air hammers and ring-rolling equipment that enable us to create flanges of a broad variety of sizes with refined grain structure and constant mechanical properties.

We scale effectively to your project timing and volume demands. Annual forging capacity is over 3,000 tonnes and machining capability ranges from prototype to large production.


melting	melting	forging	forging	rolling

Every customized titanium blind flange passes through our multi-stage inspection protocol before shipment.

PMI (XRF Testing): Verifies exact chemical composition — critical for Grade 7 (Palladium content) and Grade 23 applications.

Ultrasonic Testing (UT) 100% volumetric examination per AMS 2631 / ASTM B381 to identify internal forging flaws, voids or inclusions.

Dye Penetrant Inspection (DPI): all sealing faces are checked for surface integrity for zero micro-cracks.

CMM Dimensional Verification: Verified Bolt hole circle, thickness, facing geometry and port locations to your CAD models.

Mechanical Testing: Tensile, yield and elongation tests for confirmation of heat treatment effectiveness and conformance to certain grades.

Mechanical Properties Testing

Inner Diameter Measurement

Ultrasonic Testing

CMM Dimensional

Mounting Hole Diameter Measurement

Quality Management System Certification

Packaging Method	Details
Surface & Component Protection	Customized foam inserts and protective materials to prevent scratches, deformation, and damage to sealing surfaces
Moisture & Corrosion Protection	Vacuum-sealed packaging with desiccants to protect titanium parts during international transportation
Heavy-Duty Export Packaging	Strong wooden crates designed for bulk orders, oversized parts, and long-distance shipping
Identification & Documentation	Product labeling, packing lists, material certificates (MTC), certificates of conformity (COC), and traceability records available
Shipping Solutions	Express / air freight for urgent projects; sea freight for cost-effective bulk shipments

Q: What is the difference between Grade 2 and Grade 5 for a blind flange?

A：Grade 2 offers maximum corrosion resistance and ductility — ideal for chemical processing. Grade 5 (Ti-6Al-4V) provides higher strength (≥828 MPa yield) for high-pressure subsea or aerospace use.

Q: Can you add tapped instrument ports to the disc?

A：Yes. Our CNC machining capability allows NPT, BSP, or metric tapped holes, eccentric mounts, or sensor wells at any position based on your drawing.

Q: How do you address galling between titanium flanges and titanium bolts?

A: We suggest substituting another hardness grade of bolt, or putting anti-seize coatings such as molybdenum disulphide, or silver plating to the mating stud threads.

Q: What is the maximum achievable pressure rating?

A：By engineering flange thickness using ASME Section VIII Div. 1 calculations with Grade 5 tensile properties, we can achieve pressure ratings exceeding 10,000 PSI (690 Bar) for specialized reactor and subsea applications.

Q: How do I get started with a custom order?

A：Simply send your drawings, material grade preference, standard requirement, and quantity to our team. We will provide a detailed quotation promptly.