Titanium Tube — Export Supply from Baoji Titanium Valley

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Проверено и поддерживается инженерной командой Shaanxi Qianyi Tuoda Technology Co., Ltd.

Titanium Tube — Export Supply from Baoji Titanium Valley

A titanium tube is the heart of every titanium heat exchanger and the standard pick for seawater and corrosive-fluid lines. We stock seamless and welded tube in Gr2, Gr7 and Gr12, 6–50 mm OD, ASTM B338, cut to length the same day. Grade 2 is the seawater workhorse; Grade 7 handles reducing chloride; Grade 12 extends the reducing-acid window.

At a Glance: Titanium Tube

Titanium Tube	At a Glance
OD range	6–50 mm (larger on request)
Type	Seamless & welded
Grades	Gr2, Gr7, Gr12
Standard	ASTM B338 / B862
Wall	0.5–3 mm typical
Dispatch	Cut-to-length from Baoji stock

1. What Titanium Tube Is and Where It Is Used

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

• Shell-and-tube heat-exchanger tube bundles
• Seawater cooling and seawater coiled tube desalination loops
• Chemical-process piping (chemical-process tube)
• Offshore topside cooling and geothermal loops
• Welding wire feedstock (down-gauged)

2. Grade Selection

: Which Titanium to Specify

Grade 2 seamless tube is the default for heat-exchanger tube and seawater lines. Grade 7 (Ti-0.15Pd) is used in Gr7 chlor-alkali tube chlor-alkali duty where the film must survive low-oxygen crevices. Grade 12 is specified for Gr12 petrochemical tube petrochemical reducing-acid service. See the full B338 tube guide for grade-by-fluid guidance.

3. Standards and Dimensions to State on the RFQ

State the governing standard, dimensions, and tolerance up front so quotes are comparable. For Titanium Tube 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 Tube 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 Tube Fails

Titanium tube is not for dry chlorine or dry HCl (ignition risk), concentrated nitric acid, or fluoride-bearing streams — use zirconium or lined steel there. In air-free strong reducing acid, un-alloyed Gr2 can lose passivity; step up to Gr7 or Gr12. Keep tube-side velocity in the 1–2 m/s band to avoid both deposition and erosion-corrosion.

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. Wall thickness and OD tolerance
10. Seamless vs welded, and any NDT (ET/UT) requirement

7. Common Procurement Mistakes

• Selecting Gr2 for a stagnant, low-oxygen chloride leg (use Gr7)
• Running velocity too low (deposits → crevice attack) or too high (erosion)
• Buying untraceable tube without EN 10204 plate cert-equivalent certification

8. Seamless vs Welded

: Which Titanium Tube

Seamless tube (per B338 tube cut-to-length) has no weld line and is preferred for heat-exchanger and high-integrity duty. Welded tube (ASTM B862) is cheaper for less critical lines. We stock both; 25/32/50 mm OD tube covers the common 25/32/50 mm OD sizes.

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

B338 tube cut-to-length · 25/32/50 mm OD stock · Gr7 chlor-alkali tube · Gr12 petrochemical tube · chemical-process tube

11. FAQ — Titanium Tube

What sizes of titanium tube are in stock?

Common 6 to 50 mm OD, 0.5 to 3 mm wall, seamless and welded, cut to length from Baoji stock.

Which grade for a heat exchanger?

Grade 2 for aerated seawater; Grade 7 where the tube side is reducing or stagnant. Grade 12 for hot reducing-acid streams.

Seamless or welded titanium tube?

Seamless (ASTM B338) for exchangers and critical service; welded (B862) for general lines where cost matters.

Can titanium tube handle hydrochloric acid?

Only in specific dilute, oxidising conditions; in air-free concentrated HCl it dissolves. Grade 12 widens the window but zirconium is safer for strong acid.

What certification comes with the tube?

Mill test certificate with heat-number traceability, ASTM B338, plus NDT where specified.

Do you export titanium tube?

Yes — worldwide shipping from Baoji with export packing and full MTC.

How fast can you dispatch?

Standard sizes cut and dispatched same day from stock; non-standard OD quoted on request.

Summary: Choose by Service, Not by Habit

Choose Grade 2 tube if seawater or neutral chloride. Choose Grade 7 if reducing/low-oxygen chloride or chlor-alkali. Choose Grade 12 if hot reducing acid. Choose another material if the fluid is dry halogen or strong oxidising acid.

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