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

Product Overview

Reviewed and maintained by the Engineering Team, 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.