Titanium Fittings Supplier for Heat Exchanger Project \| WPT2/WPT5/WPT7/WPT12, ASTM B363 + B16.9, Tube-to-Fitting Grade Match, MTC 3.1, Baoji

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

Titanium Fittings Supplier for Heat Exchanger Project | WPT2/WPT7/WPT12, ASTM B363 + B16.9, Tube-Grade Matched

Meta Description: Titanium Fittings supplier for heat exchanger projects — ASTM B363 WPT2/WPT5/WPT7/WPT12 butt weld fittings matched to B338 tube grade, ASME B16.9 geometry, SCH5S–40S, pickled, bevel-capped, EN 10204 3.1 heat-traceable. Grade by medium+temperature+crevice risk; tube/fitting/flange alignment reviewed before PI.

Why Heat-Exchanger Fittings Need a Different RFQ

A heat exchanger is not a straight pipe run. The fitting lives next to:

• Tube sheet (titanium or titanium-clad)
• B338 tube (Gr1/Gr2/Gr7/Gr12)
• Shell nozzle, channel head, flange (B381 F2 / B462)
• Hot brine / seawater / reducing-acid side depending on duty

So the fitting grade must match the tube-side corrosion logic — not be picked from a catalogue habit. Gr2 tube → Gr2 fittings; hot crevice → Gr12 or Gr7 on both tube and fitting; otherwise you protect the tube and leave the elbow as the weak link.

Grade Alignment Table (tube ↔ fitting)

Rule: fitting grade ≥ tube corrosion margin. Never Gr2 fitting behind Gr7 tube.

Fitting Scope for HX Projects

• Channel-head nozzles: 90LR elbow, reducing tee, conc/ecc reducer
• Tube-sheet stub ends (Type A/B) paired with backing flange
• Vent/drain eccentric reducers (no air pocket)
• Return bends / 180° for U-tube channel loops
• Orbital-weld-ready bevels (37.5°, capped, argon-clean)

All ASTM B363 / ASME SB363 material, ASME B16.9 dimensions, MSS SP-43 for stub ends.

Wall Selection (no over-spec)

Crevice & Weld Discipline (HX-specific)

• Tube-sheet crevice is the #1 failure point — fitting is secondary, but bevel cleanliness matters
• Dual-side argon purge on site weld; straw/silver acceptable, blue/grey rejected
• No steel brush, no carbon marker, no iron pickup on bevel face
• Backing flange (CS/SS) OK on stub end — only Ti wets fluid
• Galvanic isolation at flange face (non-metallic sleeve/washer)

Retubing / MRO Support

• Small-qty elbow+tee+reducer+stub restock for turnaround
• Match original heat logic — supply original grade + cert scope, not "equivalent by eye"
• Emergency window: rotating WPT2 small-bore heat, pack same working week after lot confirm
• New-build bundle: project heat, RT/UT/PT per PO, 3.2 TPI PO-fronted

Documentation Package (project-audit ready)

• EN 10204 3.1: measured O/H/N/C + Fe (+Al/V / +Pd), tensile, heat-to-ingot
• Tag heat = MTC heat = PL heat (three-way match)
• PMI on Gr7 (Pd verified by chemistry, not label)
• CI/PL/COO/HS statement (WCO base 8108.90; destination sub-heading via broker)
• Pre-ship photos: tag + bevel + crate seal

RFQ Template (copy-paste, gets a real grade reply)

HX type: shell-tube / condenser / evaporator / MVR ___
Tube grade (B338): Gr1 / Gr2 / Gr7 / Gr12 ___
Shell/channel medium: ___
Cl- ppm: ___   Temp: ___°C   Pressure: ___bar
Fitting: elbow / tee / reducer / stub end ___
NPS × SCH: ___ (DN ___)
Grade intent: match tube / upgrade Gr7-Gr12 / advise ___
Qty: ___ pcs
Cert: 3.1 / 3.2 (TPI ___)
Incoterm: EXW Baoji / FOB Shanghai / DAP ___

FAQ — Titanium Fittings for Heat Exchanger Projects

Q1: Must fitting grade equal tube grade?
A: Corrosion margin must match. Gr2 tube + Gr2 fitting is standard; if tube is Gr7/Gr12 for hot crevice, fitting follows — never downgrade the fitting.

Q2: Which grade for seawater condenser channel?
A: Gr2 (WPT2) for ambient/aerated seawater. Above ~80°C concentrated brine → Gr12 or Gr7.

Q3: Can you supply tube + fitting same heat family?
A: Grade-aligned supply yes; same ingot only when PO bundles tube+fitting from one melt — stated before PI, not implied.

Q4: Stub end + CS backing flange for channel?
A: Common cost move. Ti contacts fluid; isolate galvanically at bolt face.

Q5: MRO small qty for retubing?
A: Handled — same cert scope as new build, no moq drama.

Q6: HF in cleaning cycle?
A: Red line. Flag before PI; titanium excluded from fluoride-acid service.

Q7: 3.2 for class submission?
A: PO-fronted TPI (SGS/BV/TÜV/DNV). Cannot be back-built from 3.1 after shipment.

Q8: Orbital weld ready?
A: Bevel 37.5° machined, capped, argon-clean. Site WPS/qualification is installer scope.

Q9: Large bore channel nozzle?
A: Welded/fabricated WPT2/WPT12, project heat, RT per PO. Not "shelf stock".

Q10: HS code?
A: WCO 6-digit 8108.90 base; country sub-heading via broker. Process statement supplied.

Request a Quote

Email: sales@[yourdomain].com

Send tube grade + medium + T/pressure + fitting list. Reply in 24h: grade alignment advice, live heat status, EXW/FOB price, MTC type, dispatch window.

About: Baoji Titanium Valley HX-project line — ASTM B363 WPT2/WPT5/WPT7/WPT12 butt weld fittings, ASME B16.9, tube-grade aligned, pickled, bevel-capped, heat-traceable, EN 10204 3.1. Grade chosen by tube-side duty (seawater / hot brine / reducing acid), not by "titanium" as a blanket word. No Gr2 fitting behind Gr7 tube, no phantom same-ingot claim, no cert downgrade on small MRO qty.