Titanium Tubing for Chemical Process Equipment \| Gr2/Gr7/Gr12 ASTM B338/B861, Media-Based Selection

Product Overview

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

Titanium Tubing for Chemical Process Equipment | Gr2/Gr7/Gr12, Picked by Medium — Not by Habit

Meta Description: Titanium tubing for chemical process equipment — Gr2 default, Gr7 for reducing acids, Gr12 for hot crevice/brine. ASTM B338/B861, media-based grade selection, ECT/hydro per PO, EN 10204 3.1 heat-traceable. Quote in 24h.

Overview — "Corrosion Resistant" Is Not a Spec

Every supplier says titanium "resists corrosion". True — but only in the right medium. Hand titanium tube to flowing seawater or dilute nitric acid and it runs 20+ years. Hand it to hydrofluoric acid, dry chlorine gas, or red-fuming nitric acid and the oxide film collapses. Chemical-plant procurement doesn't need another "titanium is great" paragraph — it needs a medium-first grade decision.

We are a Baoji Titanium Valley inventory holder. Gr2/TA2 rotates in stock for HX and process lines; Gr7/Gr12 quoted on heat-confirm; B338 (tube) and B861 (pipe) called out before cutting. We advise by fluid chemistry, not by upsell.

Grade Decision Starts With the Fluid, Not the Price

Rule: Gr2 is the default for oxidizing/chloride service. Move to Gr7 only on reducing-acid/crevice flag; move to Gr12 on hot-crevice/brine economics. Don't buy palladium you don't need.[1,2](@ref)

Where Titanium Tubes Actually Sit in a Chemical Plant

• Chlor-alkali: brine preheater, chlorine cooler, hypochlorite lines
• Nitric acid dilution / nitrate lines (wet, oxidizing)
• Organic acid reactors: acetic, citric, formic (oxidizing side)
• Shell-and-tube coolers for chloride-bearing process streams
• API overhead condensers with seawater/brine cooling side
• Bleach / pulp-plant washer piping
• Pharma CIP rinse loops (low ion leaching, clean ID)

Hard No-Go List (Write on the Drawing)

• Hydrofluoric acid (HF) and fluorides — titanium dissolves; use Hastelloy/PTFE-lined
• Dry chlorine gas — pyrophoric risk; only wet Cl₂ with moisture is safe
• Red fuming nitric acid / anhydrous strong reducing blends — verify redox before spec
• Concentrated boiling HCl/H₂SO₄ (no oxidizer) — Gr2 fails; Gr7 helps, but confirm concentration/temp

We ask for the MSDS / stream composition before quoting chemical service. A tube that "looks like Gr2" in a warehouse can fail in week 6 if the medium is wrong.

Tube vs Pipe — Standard Boundary (Again, Because QA Rejects Sloppy POs)

Stock Scope (Honest)

Technical Baseline (Gr2 Annealed)

Chemical-Service NDT & Cleanliness (Not Optional)

• EN 10204 3.1 — mill authorized inspection rep, heat-matched
• Chemistry numeric (O/N/H/Fe), not "complies"
• Welded B338: 100% ECT + hydro (1.5× design when PO states)
• Seamless: UT + ECT per PO matrix; flatten/flare on welded B338
• ID degrease + DI rinse for pharma/CIP; particle decl. on request
• No carbon-steel contact in finishing/pack
• 3.2 (SGS/BV/TÜV/DNV) witness at buyer cost, PO-fronted

Grade-Upgrade Trigger Checklist (Send to Your Metallurgist)

1. Medium pH & redox: oxidizing or reducing?
2. Cl⁻ concentration + temperature (stagnant crevice risk?)
3. Acid name + concentration + boiling point
4. Shutdown CIP chemistry (HCl/H₂SO₄/NaOH cycle?)
5. Velocity + solids (erosion at inlet?)
6. Code: ASME VIII / PED / GB150 — dual cert needed?

If Q2+Q4 flag hot reducing acid → Gr7. If Q2+temp>200°C → Gr12 economics. Otherwise Gr2.

Cut / End / Pack for Chemical MRO

• Square cut, ID/OD deburr, no burr shedding into startup
• Plain end default; bevel 37.5° for field GTAW on pipe
• Both ends capped + PE sleeve
• Clean bag + plywood crate (ISPM-15) + desiccant for long-sea
• Tag = MTC heat No. = PL/crate label

Enquiry Template (Copy-Paste for Chemical Buyers)

Stream / medium: ___ (MSDS or comp. attached)
Concentration / temp / pH / redox: ___
Cl⁻ ppm: ___ ; solids/velocity: ___
Standard: ASTM B338 (tube) / B861 (pipe) ___
Grade preference: Gr2 / Gr7 / Gr12 / let supplier advise
OD × wall: ___ mm  (or NPS SCH ___)
Length: ___ mm × ___ pcs
U-bend? radius ___ / straight
NDT: ECT / UT / hydro ___ MPa / 3.1 or 3.2
Dual cert SB-338/SB-861 needed? Y/N
Port: ___ (FOB Shanghai default)

FAQ — Titanium Tubing for Chemical Process Equipment

Q1: Can Gr2 handle sulfuric acid?
A: Only in oxidizing/dilute/short-contact conditions. Boiling concentrated H₂SO₄ with no oxidizer → Gr7 or non-titanium. Send concentration+temperature; we don't guess.

Q2: Is titanium OK for HF?
A: No. Hydrofluoric acid and fluorides attack titanium directly. Stop here, switch lining/alloy.

Q3: Wet chlorine vs dry chlorine?
A: Wet Cl₂ (with moisture) → Gr2 standard. Dry Cl₂ gas → fire/pyrophoric risk, not a titanium service.

Q4: Why not always Gr7 to be safe?
A: Pd premium 30–40% for zero gain in oxidizing seawater. Over-spec = wasted CAPEX with no reliability return.

Q5: Gr12 worth it?
A: Above ~200°C brine or under-deposit crevice — yes; higher allowable stress can thin wall and pay back. Cold service — no.

Q6: Tube or pipe for a reactor cooling coil?
A: Coil/HX bundle = B338 tube. Pressure transport to reactor = B861 pipe. PO must name it.

Q7: NDT scope for chemical HX?
A: Welded = 100% ECT + hydro; seamless = UT/ECT per PO. Flatten+flare on welded B338 sample.

Q8: Pharma CIP clean ID?
A: Degrease + DI rinse + dust-free pack; particle/ion-leach decl. on request. Not "sterile" claim.

Q9: Dispatch?
A: In-stock Gr2 + PO before 3 PM China time → same-day cut/dispatch. Sea FOB Shanghai; air for shutdown at buyer cost.

Q10: MTC real 3.1?
A: Mill-issued 3.1 from original mill's authorized inspection rep, heat-matched. Trader cert not passed as mill cert.

Request a Quote

Email: sales@[yourdomain].com

Send stream composition + standard + OD×wall×length. Reply within 24h: grade advice, live heat, NDT scope, EXW/FOB quote, dispatch date.

About: Baoji Titanium Valley inventory holder. Titanium tubing for chemical process equipment — Gr2 default, Gr7/Gr12 on metallurgy-confirm, ASTM B338/B861, annealed, NDT per PO, EN 10204 3.1 heat-traceable. We pick the grade by your medium, not by our margin.