Gr2 Titanium Fittings for Chemical Piping \| ASTM B363 WPT2, ASME B16.9, SCH5S–40S, Pickled, MTC 3.1, Baoji

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

Gr2 Titanium Fittings for Chemical Piping | WPT2 ASTM B363, ASME B16.9, MTC 3.1

Meta Description: Gr2 (WPT2) Titanium Fittings for chemical piping — ASTM B363 + ASME B16.9, elbow/tee/reducer/stub end, SCH5S–40S, pickled, argon-clean bevel, EN 10204 3.1 with measured interstitials. For wet chlorine, nitrate, seawater cooling, chlor-alkali, desalination.

Why Gr2 Is the Default for Chemical Titanium Lines

Commercially pure Titanium Gr2 (ASTM B363 WPT2) sits at the sweet spot: better strength than Gr1, better formability than Gr3, and the same passive oxide film that shrugs off chloride attack. In most oxidizing/neutral chemical services, Gr2 needs no corrosion allowance — the design wall is the service wall.

• Self-healing TiO₂ film in oxygen-containing media
• Resists wet Cl₂, hypochlorite, nitrate, chromic/nitric acid (oxidizing side)
• Seawater/desalination up to ~80°C crevice-corrosion-safe in normal flow
• GTAW-friendly, no preheat, no post-weld heat treat for CP Ti
• ~30% lower material cost than Gr5, far easier to form than TC4

Correct Spec Wording (avoid RFQ rework)

"Gr2 B363" is fine in conversation; the stamped mark readsWPT2 / ASTM B363 / NPS×SCH / HEAT XXX.

Fitting Scope

• 90° LR (1.5D) / SR (1.0D) / 45° elbow
• Equal tee / reducing tee
• Concentric / eccentric reducer (flat-side orientation per P&ID)
• Stub end Type A/B (lap-joint companion)
• Cap, cross — same heat, same crate

Media Fit — Gr2 Green / Red Line

Rule of thumb: oxidizing chloride = Gr2; reducing chloride = Gr7/Gr12. We say so before PO, not after failure.

Chemistry & Mechanical (measured on MTC)

MTC = EN 10204 3.1, heat-to-ingot, measured values (not minima-only).

Surface & Weld-End Discipline

• Pickled descale (HF/HNO₃) + passivation look, no drawing lube
• Bevel 37.5°±2.5°, plastic cap + desiccant
• No steel-wire brush, no carbon marker, no Fe contamination
• Site weld: back-purge Ar until HAZ <315°C, no blue bead
• Gasket note: no PTFE-decomp fluorine release; spiral-wound + inert filler OK

When to Step Up from Gr2

Gr2→Gr7 is a corrosion decision, not a "better metal" brag. We route by media, not margin.

Inspection & Docs

• Dimensional per B16.9; PT on welded seam if welded construction
• PMI spot / chem verification; non-magnetic ≠ grade proof
• UT/ET on seamless per PO; RT on welded fittings when specified
• MTC 3.1 standard; 3.2 (SGS/BV/TÜV) PO-fronted
• Bundle: CI + PL + MTC + COO + HS statement (WCO 8108.90 base; local sub-heading via broker)

Export Packaging

• ISPM-15 plywood case, bubble wrap per piece
• Bevel caps + desiccant, "DRY / ARGON-CLEAN ENDS"
• Mixed elbow+tee+reducer crate allowed, each tagged, one cert pouch
• Pre-ship photo: marking close-up + bevel + crate

Enquiry Template (Copy-Paste)

Medium: ___ (write real chemistry + temp + Cl- ppm + pH)
Grade: WPT2 (Gr2) / upgrade to WPT7/WPT12? ___
Fitting: 90LR elbow / equal tee / conc reducer ___
NPS × SCH: ___ (DN ___)
Qty: ___ pcs
Surface: pickled / bright ___
Bevel: 37.5° std / custom ___
Welded or seamless: ___ (PO route)
Cert: 3.1 / 3.2 (TPI ___)
Gasket/fluoride control: confirmed Y/N
Incoterm: EXW Baoji / FOB Shanghai / DAP ___
Destination: ___

FAQ — Gr2 Titanium Fittings for Chemical Piping

Q1: Can Gr2 handle hydrochloric acid?
A: Dilute/reducing HCl is a Gr7 (Pd) case. Gr2 fits oxidizing chloride (wet Cl₂, seawater, hypochlorite), not reducing HCl — we flag this pre-PO.

Q2: Why not always Gr7?
A: Gr7 costs more and isn't needed in oxidizing service. Gr2 + correct argon weld = 15+ yr life in seawater/chlor-alkali.

Q3: SCH10S enough for chemical line?
A: Often yes — no corrosion allowance. Wall chosen by pressure/temp per B36.19M, not by rust buffer.

Q4: HF really banned?
A: Yes. Any fluoride <pH7 attacks titanium fast. No HF cleaning on site; gaskets must not release F on heat.

Q5: Pickled vs bright for chemical service?
A: Pickled default — removes alpha-case/scale, best for weld purge. Bright for visual/pharma; corrosion equal if clean.

Q6: MTC real numbers?
A: Measured O/Fe/H/N/C + tensile, heat-to-ingot, EN 10204 3.1.

Q7: Stub end with lap joint flange?
A: Yes — stub end WPT2, flange F2 per B381; isolate galvanic contact from CS/SS with gasket spacer.

Q8: Max service temp?
A: ~425°C continuous (800°F); above that oxide film degrades — design review needed.

Q9: Large bore 16"+?
A: Welded/fabricated, project heat, WPS+RT per PO. No ghost shelf on big sizes.

Q10: Dispatch?
A: Seamless NPS1/2–4 qualified heats → same working week after lot confirm; welded large-bore → PI-date commit.

Request a Quote

Email: sales@[yourdomain].com

Send media sheet (chemistry/temp/pH/Cl-) + fitting + NPS×SCH + cert scope. Reply in 24h: grade recommendation, live heat, EXW/FOB price, dispatch window.

About: Baoji Titanium Valley chemical-line fittings — Gr2/WPT2 per ASTM B363, ASME B16.9, SCH5S–40S, pickled, bevel-capped, heat-traceable, EN 10204 3.1. We don't oversell Gr2 into HF or reducing HCl; we route to Gr7/Gr12 before PO. No relabel, no silent welded-as-seamless, no fluoride surprises on site.