Titanium Flange — Export Supply from Baoji Titanium Valley

Product Overview

Reviewed and maintained by the Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd.

Titanium Flange — 钛法兰 Export Supply from Baoji Titanium Valley

A titanium flange connects corrosion-resistant pipe and equipment in seawater and chemical plants. We supply weld-neck, blind, slip-on and custom flanges in Gr2 and Gr7, ASME B16.5, PN10/PN16, with RT test reports. Grade 2 for seawater; Grade 7 for reducing or acidic chloride.

At a Glance: Titanium Flange

Titanium Flange	At a Glance
Type	Weld-neck, blind, slip-on, custom
Grades	Gr2, Gr7, Gr5
Standard	ASME B16.5 / EN 1092
Rating	PN10, PN16, 150#
Test	RT report available
Dispatch	Small sizes from stock

1. What Titanium Flange Is and Where It Is Used

Titanium Flange is specified wherever stainless steel fails by corrosion but the part must stay light, strong, or biocompatible. Typical uses:

• Seawater intake and cooling piping
• chemical flange chemical-process pipelines
• RT-test flange pressure equipment with RT qualification
• flange machining flanges machined from forged bar
• small-size flange compact instruments and spares

2. Grade Selection

: Which Titanium to Specify

Grade 2 — Gr2 ANSI B16.5 flange — is the standard for seawater and neutral chloride piping. Grade 7 — used in chemical flange chemical lines — resists reducing/acidic chloride. Grade 5 — Gr5 pressure-vessel flange — is used for pressure-vessel flanges needing strength. The weld-neck RF flange weld-neck RF is the most requested type.

3. Standards and Dimensions to State on the RFQ

State the governing standard, dimensions, and tolerance up front so quotes are comparable. For Titanium Flange this is usually the relevant ASTM/ASME grade plus your drawing or nominal size. Insist on mill-test certification with heat-number traceability.

4. Titanium Flange in Seawater and Chloride Service

For open, aerated seawater Grade 2 is the default; where the service is reducing, acidic, or has stagnant/creviced zones, step up to Grade 7 (Ti-0.15Pd). Keep flow velocity in the 1–2 m/s band to prevent deposit-driven crevice attack. Related reading: seawater desalination plate and Grade 7 seawater exchanger.

5. The Limitation You Must Know

: Where Titanium Flange Fails

Titanium Flanges share titanium’s exclusions: no dry chlorine/HCl, no concentrated nitric, no fluoride streams. Bolting matters — pair with compatible fasteners (ASTM F467 fasteners) and avoid galvanic coupling to carbon steel without insulation. In low-oxygen crevices at the gasket line, prefer Gr7. Flanges are not for high-temperature oxidising acid service.

6. Sizing and Specification Checklist (RFQ-Ready)

1. Grade and temper (Gr2 / Gr5 / Gr7 / Gr12 / Gr23) with the reason above.
2. Dimensions — size, thickness/OD, length, or bore as applicable.
3. Standard (ASTM/ASME/EN) and tolerance class.
4. Quantity and lot — single piece or batch.
5. Surface finish — pickled, polished, machined, or as-rolled.
6. Certificate — EN 10204 3.1 with heat number.
7. NDT requirement — RT/PT/ET where the code demands it.
8. Packing and destination — export packing and freight.
9. Flange type and facing (RF/FF)
10. Bolt circle and RT/PT requirement

7. Common Procurement Mistakes

• Mixing Gr2 flange with carbon-steel bolting (galvanic corrosion) without insulation
• Using Gr2 in a reducing/acidic chloride line (use Gr7)
• Omitting the RT test where the code requires it (RT-test flange)

8. Weld-Neck vs Slip-On vs Blind

weld-neck RF flange weld-neck flanges give the best fatigue and alignment for cyclic seawater duty; slip-on is cheaper for low-stress lines; blind flanges (blind weld-neck flange) close unused nozzles. We machine all three from forged stock (flange machining).

9. Why Buy From a Baoji Titanium-Valley Stockist

We hold ~800 tons of titanium and nickel inventory in Baoji, China’s Titanium Valley, and cut to size the same day. That means small MOQ, fast dispatch, and the ability to supply both standard stock and non-standard parts to drawing — without a minimum-lot penalty. Every lot ships with MTC and export documentation.

10. Related Products and Where to Click Next

PN10/PN16 flange · Gr2 ANSI B16.5 · RT-test flange · blind weld-neck · flange to drawing

11. FAQ — Titanium Flange

What titanium flange standards do you make?

ASME B16.5 and EN 1092-1, PN10/PN16 and 150#, in weld-neck, slip-on, blind and custom types.

Which grade for seawater flanges?

Grade 2 for open seawater; Grade 7 where the line is reducing or acidic.

Can you provide RT test reports?

Yes — radiography and PT reports available on request for qualified joints.

Do you machine flanges from bar?

Yes — forged bar is machined to drawing, including small batches.

What bolting should I use?

Titanium or suitably insulated fasteners to avoid galvanic corrosion with steel.

What certification?

EN 10204 3.1 MTC; NDT reports where specified.

Do you export Titanium Flanges?

Yes — worldwide from Baoji with export packing.

Summary: Choose by Service, Not by Habit

Choose Gr2 flange if seawater or neutral chloride. Choose Gr7 if reducing/acidic chloride. Choose Gr5 if high strength is required. Choose weld-neck if cyclic or high-integrity duty; slip-on for low-stress lines.

Send the checklist above to [email protected] or use the inquiry form — we confirm stock and pricing within 24 hours.