Titanium Flange Cut to Drawing from Inventory \| ASTM B381 F-2/WPT2, Forged Blank + CNC per DWG, B16.5/EN1092/JIS, MTC 3.1, Baoji

Product Overview

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

Titanium Flange Cut to Drawing from Inventory | ASTM B381 F-2/WPT2, Forged Blank + CNC per DWG

Meta Description: Titanium Flanges machined to drawing from rotating forged inventory — ASTM B381 F-2/WPT2/R50400, Gr5/Gr7/Gr12 on PO, bore/hub/bolt-circle/RTJ groove per CAD/PDF/isometric. Same heat carried billet→finished flange; EN 10204 3.1, PMI, UT/PT.

What "From Inventory" Actually Means Here

Not "we have your exact non-standard flange on a shelf" — that would be dishonest. It means:

• Certified titanium forged blank / rough-turned ring from a confirmed rotating heat (Gr2 default, Gr5/Gr7/Gr12 PO-grade)
• B381 forging route already done: billet → forge → anneal → rough machine
• Your drawing drives the finish CNC stage only: bore, hub taper, facing, bolt-circle, RTJ groove, counterbore, special thickness
• Heat number etched before machining starts — never reassigned

Result: non-standard geometry without re-melting or waiting for a new forge campaign.

What We Machine per Drawing

• Custom bore to pipe SCH (5S/10S/40S/80S/XXS) or full-diameter
• Non-B16.5 bolt circle / PN-DIN drill / JIS B2220 / HG-T pattern
• RTJ groove to spec, tongue-groove, M&F, extended hub, long weld neck
• Eccentric/reducing flange, orifice flange, spectacle blind companion
• Special thickness, facing finish (Ra control), counterbore, seal chamber
• CAD / PDF / STEP / isometric + gasket dwg all accepted

Standards Covered

• Material: ASTM B381 / ASME SB381 (F-2/F-5/F-7/F-12)
• Dim base: ASME B16.5 (NPS 1/2–24), B16.47 Series A/B for large bore
• Alternate: EN 1092-1, DIN 2627–2638, JIS B2220, GB/HG on request
• Class: 150–2500 (class fixes dimensions/bolt pattern; working pressure calculated per grade+T)

Process Chain (traceability intact)

1. Confirm rotating heat No. from forged blank stock
2. DFM check: drawing vs forge envelope (hub length, min thickness)
3. CNC turn/bore/drill/groove per DWG
4. Anneal stress-relief if cold-cut depth triggers code review
5. Pickle descale, face protect, re-etch heat No.
6. MTC 3.1: parent heat chemistry + finish-dim report + NDE

Parent heat = finished-flange heat. Drawing changes geometry, not metallurgy.

Lead-Time Logic (honest)

We quote the window after seeing the drawing + confirming blank — not before.

Drawing RFQ Checklist

Attached: CAD/PDF/STEP ___
Type: WN / SO / Blind / LJ / Orifice / LWN ___
Grade: Gr2 (F-2/WPT2/R50400) / Gr5 / Gr7 / Gr12 ___
NPS & bore (SCH): ___
Class / standard: B16.5 300# / EN1092 PN16 / JIS 10K ___
Facing: RF / FF / RTJ (groove dwg) / T&G ___
Bolt holes: Qty + PCD + hole Ø + tap? ___
Special: hub length / counterbore / thickness / Ra ___
Qty: ___ pcs
Cert: 3.1 / 3.2 (TPI ___)
Incoterm: EXW Baoji / FOB Shanghai / DAP ___

Inspection & Cert

• PMI/XRF grade verify (Gr7 Pd by chemistry)
• UT on forging, PT on machined face
• CMM/dial dim report vs drawing datums
• EN 10204 3.1: parent-heat chemistry + tensile, QA-signed
• 3.2 (SGS/BV/TÜV/DNV) PO-fronted — not back-built after machining

When This Route Beats Full Standard Stock

• Isometric bore doesn't match SCH 40S default
• Existing equipment drilled to old DIN/PN pattern
• RTJ groove or orifice tap not in catalogue
• Spare flange must match a 10-year-old line exactly
• Prototype before full project award

When It Is NOT the Right Route

• Pure standard B16.5 RF Class300 → use stock page, faster/cheaper
• HF / dry chlorine / red fuming nitric → titanium excluded, stop before quote
• No drawing, "make it fit" → we DFM-review first, never blind-cut

FAQ — Titanium Flange Cut to Drawing from Inventory

Q1: Is it really "from inventory"?
A: Forged blank from a confirmed rotating heat — CNC finish per your dwg. Not a finished standard flange waiting on shelf, but no re-melt either.

Q2: Does heat number stay valid after machining?
A: Yes. Geometry changes; metallurgy doesn't. Parent heat = finished heat, re-etched post-machine.

Q3: Which files do you need?
A: CAD/STEP preferred; clean PDF with dims + tolerance + facing detail works.

Q4: Can you copy an old flange with no drawing?
A: Yes — send the sample or full-dim sketch; we reverse-measure, issue DFM, then machine.

Q5: Gr2 enough?
A: Ambient–moderate seawater/oxide service yes. Hot crevice brine → Gr7/Gr12 review before cut.

Q6: Tolerance?
A: B16.5 datums standard; tighter bore/face Ra by dwg, typical CNC ±0.02–0.1mm by feature.

Q7: RTJ groove ok?
A: Machined to groove dwg / B16.5, not hand-finished.

Q8: 1-piece prototype?
A: Handled. No moq wall for drawing jobs.

Q9: 3.2 possible?
A: TPI at PO stage; witnesses forge+NDE. Cannot be retro from 3.1.

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

Request a Quote

Email: sales@[yourdomain].com

Attach drawing + grade + qty. Reply in 24h: blank heat status, DFM note, EXW/FOB price, machine slot, dispatch window.

About: Baoji Titanium Valley drawing-flange line — ASTM B381 F-2/WPT2 forged blank → CNC per CAD/PDF, ASME B16.5/EN1092/JIS, RF/RTJ/T&G, heat-carried, pickle-finished, EN 10204 3.1. Non-standard bore/hub/drill without re-melting. No heat reassign, no cast substitute, no cert downgrade. Lot confirmed before PI; tag = MTC = PL.