Custom OEM Titanium Flanges Manufacturer & Supplier

ASTM B381 Grade 2 is commercially pure (CP) titanium, offering the premier baseline resistance against general and localized pitting corrosion in oxidizing chemicals, nitric acid, wet chlorine, and ambient seawater. It is easily weldable and exhibits high ductility (elongation ≥ 20%). Grade 5 (Ti-6Al-4V) is an alpha-beta alloy with more than double the mechanical tensile strength (≥ 895 MPa vs 345 MPa), making it the mandatory standard for high-pressure flanges (Class 600 through Class 2500), subsea manifolds, and aerospace fluid lines where wall thickness and weight reduction are critical.

Titanium naturally forms a microscopic titanium oxide (TiO2) film that can break down under intense sliding friction, causing cold welding or galling between titanium stud threads and flange nuts. Navzo recommends three critical preventative measures: 1) Pairing Grade 2 flanges with slightly dissimilar-hardness Grade 5 studs; 2) Applying high-purity nickel-free or copper-free anti-seize pastes (e.g., molybdenum disulfide / MoS2 or PTFE-based compounds); and 3) Utilizing Navzo’s factory-applied PVD or hard-anodized surface treatments on threaded studs.

Unless otherwise specified by customer engineering drawings, all Navzo raised-face (RF) titanium flanges conform strictly to ASME B16.5 Clause 6.4.5. Sealing faces are machined with a serrated concentric or serrated spiral phonographic finish featuring a resultant surface roughness between Ra 3.2 µm and 6.3 µm (125 to 250 µin AARH) with a 90° tool angle and 0.4 mm to 0.8 mm pitch, ensuring reliable mechanical bite and grip on spiral-wound graphite, PTFE, or corrugated metal gaskets.

Every production lot is fully traceable. Standard documentation packages include: 1) EN 10204 Type 3.1 Material Test Reports (MTR) detailing chemical analysis and tensile/yield/elongation mechanical test values; 2) 100% Ultrasonic Testing (UT) per AMS 2631 or ASTM A388 for forged hubs; 3) Liquid Penetrant Testing (PT) per ASTM E165 to verify surface integrity; and 4) Dimensional inspection reports generated via calibrated CMMs. Third-party inspection (TPI) by DNV, BV, SGS, or TÜV is routinely supported.

Yes. More than 45% of our monthly throughput involves custom OEM flange configurations. This includes non-standard PCD (Pitch Circle Diameter) dimensions, custom weld-neck bore tapers to match unique pipe schedules, integrated thermowell or instrument tap ports, oval ring-type joint (RTJ) grooves per ASME B16.20, and multi-port spectacle blinds. Simply transmit 2D CAD (PDF, DWG) or 3D CAD files (STEP, IGES) for complete engineering review.

Commercially pure Grade 2 titanium is immune to pitting in seawater up to 80°C (176°F). However, in tight crevices (such as between the gasket and flange face) above this temperature, acidic micro-environments can develop. For high-temperature chloride service (such as desalination thermal brine heaters operating between 80°C and 250°C), Navzo strongly recommends Grade 7 (palladium-stabilized) or Grade 12 (0.3% Mo, 0.8% Ni) titanium flanges, which maintain protective passivity under acidic, oxygen-depleted crevice conditions.

Because our Baoji facility maintains a permanent warehouse inventory of pre-certified Grade 2, Grade 5, and Grade 12 forged rounds and billets, rapid-prototype batches (1 to 10 pieces) can be CNC-machined and dispatched in as few as 10 to 14 business days. Standard production runs for ASME B16.5 catalog sizes (1/2" through 24") typically deliver within 3 to 4 weeks. We do not enforce punitive MOQs on custom titanium forgings.

Yes. Navzo is a recognized manufacturer of high-precision titanium fasteners, including DIN 912 socket head screws, heavy hex bolts, full-thread studs, and 12-point flange locking nuts. We frequently assemble matched flange kits containing precision-forged titanium flanges, custom-length ASTM B348 Grade 5 studs, and flange nuts, ensuring identical thermal expansion coefficients ($8.6 \times 10^{-6}/\text{K}$ for Ti vs $16 \times 10^{-6}/\text{K}$ for stainless steel) and zero risk of galvanic cell acceleration.