Titanium Pipe for Desalination Plant Ready Stock \| Gr2 ASTM B861/B338, Seawater Piping & HX Tube

Product Overview

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

Titanium Pipe for Desalination Plant Ready Stock | Gr2 ASTM B861/B338, Seawater Grade

Meta Description: Titanium pipe for desalination plant ready stock from Baoji. Gr2 ASTM B861 process pipe + B338 HX tube, annealed, ECT/hydro per PO, EN 10204 3.1 heat-traceable, cut-to-length, seaworthy packed. Quote in 24h.

Overview — Desalination Buys Uptime, Not Just Pipe

A desalination plant doesn't lose money on titanium pipe. It loses money on the day a seawater line pits through and the train trips offline. One MSF train down = thousands of m³ fresh water lost per hour. That's why Gr2 titanium became the default for seawater-contact piping and brine-side heat-transfer surfaces: the TiO₂ passive film reforms itself, so the material doesn't rely on a paint coat or cathodic system to survive.

We are a Baoji Titanium Valley inventory holder. Gr2 seamless pipe (ASTM B861) sits on rotating stock; B338 HX tube and Gr7 (Pd) backup grade quoted on heat-confirm. Cut-to-length, annealed, NDT per PO, EN 10204 3.1, seaworthy crate. We sell the downtime you don't have, not a miracle metal.

Pipe vs Tube — Name the Right Standard First

B861 = piping that holds pressure. B338 = tube that transfers heat. Mixing them on a PO is the #1 reason desalination RFQs get kicked back by QA. We confirm the standard before cutting, not after.

Why Gr2, Why Not Wait for "Cheaper" Alloy

• Seawater chloride 10,000–45,000 ppm → 316L pits, CuNi erodes at high velocity
• Gr2 forms self-healing TiO₂ film; normal flowing seawater = passivated, not "coated"
• MSF brine heater 110–120°C, MED 65–70°C, SWRO feed high-pressure → Gr2 covers most duties
• Hot, stagnant, oxygen-starved crevice → Gr7 (0.15Pd) or Gr12 considered; we advise by medium, not habit
• Density 4.5 g/cm³ → ~45% lighter than steel, smaller supports, cheaper install
• Design life commonly 20–30 yr in real MSF/MED service; retubing rare if velocity/deposit control done right

Ready Stock Scope (Live Heat Confirmed Before PI)

Honest boundary: sub-SCH 10S thin-wall large OD and Gr7 full-range = draw/project order. We don't claim "all NB on shelf."

Technical Baseline (Gr2 / TA2, Annealed)

Where It Sits in the Plant (No Guessing)

• MSF: brine heater tubes, recovery/heat-rejection condenser, seawater inlet manifold
• MED: evaporator tube bundle, final condenser, distillate cooler shell-side contact
• SWRO: high-pressure seawater feed pipe, energy-recovery cooling loop, chemical-dosing line
• Brine reject line: titanium pipe beats CuNi on velocity + silt/erosion
• Offshore: topside seawater cooling main, fire-water (where spec allows titanium)

Velocity note: titanium tolerates high flow, but intake screening + deposit control still matter — a sand-laden inlet will erode any metal at the tube mouth. We flag inlet sleeve/thick-wall transition in the quote if your velocity >3.5 m/s.

Gr2 vs Gr7 — When to Step Up

We don't auto-upsell Gr7. We ask for brine temp, pH dip, shutdown-cleaning chem, then advise.

Cut / Bevel / End Prep for Field Welding

• Plain end (PE) square cut — default
• Beveled end (BE) 37.5°±2.5°, J-groove on thick wall
• Argon-backing-ready: clean oxide-free land, no carbon-steel contact
• Plastic cap + PE sleeve until site fit-up
• WPS qualified by your ASME/PED fabricator; we supply annealed tube + chemistry, not the procedure

Testing & MTC (Desalination QA Standard)

• EN 10204 Type 3.1 — mill authorized inspection rep signs, heat-matched
• Chemistry incl. interstitials (O/N/C/H/Fe) — numeric, not "complies"
• Pipe: UT + hydrostatic (1.5× design when PO specifies) / pneumatic on request
• Tube: 100% ECT on welded; seamless per PO NDT matrix
• PMI spot-check available; confirms Gr2 vs Gr7 Pd distinction
• 3.2 (SGS/BV/TÜV/DNV) witness at buyer cost
• Tag = MTC = packing list = crate label. No heat swap.

Seaworthy Packaging (GCC/Africa/India Long-Sea)

• Plastic end caps + PE sleeve on every length
• Bundle with nylon sling (no carbon chain contact)
• Plywood crate / steel-frame skid, ISPM-15 fumigated
• Moisture barrier + desiccant
• Heat-number tag outside + duplicate inside waterproof pouch
• MTC pouch external, CI/PL/COO/MSDS in sealed envelope

Enquiry Template (Copy-Paste for EPC)

Plant process: MSF / MED / SWRO ___
Line: intake / brine heater / condenser / reject / HP feed
Standard: ASTM B861 (pipe) / B338 (tube) ___
Grade: Gr2 / Gr7 / Gr12 ___
Size: NPS ___ SCH ___  (or OD×wall ___)
Length: ___ m × ___ pcs
End: PE / BE bevel / flange-ready
Medium: seawater TDS ___ ppm, temp ___°C, pH ___, velocity ___ m/s
NDT: UT+hydro / ECT / 3.1 or 3.2
Port: ___ (FOB Shanghai default)
Shutdown window: ___ (priority dispatch if any)

FAQ — Titanium Pipe for Desalination

Q1: Is Gr2 enough for seawater, or do I need Gr7?
A: Flowing aerated seawater → Gr2 is the industry default. Hot stagnant crevice, reducing-acid CIP, or oxygen-starved pockets → Gr7. Send medium data; we advise, not upsell.

Q2: Pipe (B861) and tube (B338) — same thing?
A: No. B861 holds pressure in piping; B338 is heat-transfer tube in bundles. PO must name the right standard or QA rejects it. We confirm before cutting.

Q3: What sizes are truly on shelf?
A: Gr2 B861 SCH 10S/40S common NBs rotate in stock; B338 19/25.4mm tube walls 0.7–1.2mm common. Exact heat confirmed before PI — no "all NB ready" bluff.

Q4: Hydrostatic test pressure?
A: Per ordered spec (commonly 1.5× design pressure) or B861 basis when PO states it. Not assumed; written in quote.

Q5: Can you bevel for site GTAW?
A: Yes — 37.5° bevel, clean land, argon-fit. WPS still qualified by your fabrication shop.

Q6: Erosion at high velocity?
A: Titanium handles higher velocity than CuNi, but sand-laden intake still needs screening/inlet sleeve. We flag >3.5 m/s and propose thick-wall transition.

Q7: MTC real 3.1?
A: Mill-issued 3.1 from original mill's authorized inspection rep, heat-matched. Trader-signed copy not passed as mill cert.

Q8: Dispatch speed?
A: In-stock gauge + PO before 3 PM China time → same-day dispatch. Sea FOB Shanghai; air for shutdown at buyer cost.

Q9: Mixed pipe + tube + plate in one PO?
A: Yes — pipe/tube/plate/clad can ship in one crate plan; one PI, one MTC pack per heat.

Q10: Service life claim?
A: Real MSF/MED titanium bundles commonly run 20–30 yr; not "never replace." Life depends on velocity, deposits, cleaning chem — we state the condition, not a fairy tale.

Request a Quote

Email: sales@[yourdomain].com

Send process line + standard + size + medium data. Reply within 24 working hours: live heat, EXW/FOB quote, NDT scope, dispatch date.

About: Baoji Titanium Valley inventory holder. Titanium pipe for desalination plant — Gr2 ASTM B861 process pipe + B338 HX tube on rotating stock, Gr7/Gr12 on heat-confirm, annealed, NDT per PO, EN 10204 3.1 heat-traceable, seaworthy crated. We quote the downtime you avoid, not just the kilogram.