Titanium Lap Joint Flange

Updated : Aug. 12, 2025

3-Line Value Snapshot

Rotatable Ring – perfect bolt alignment, single-shot gasket seating

Replace Stub Only – corrosion isolated; ring reusable under proper protection

20–35 % Cost Cut – media touches titanium only; ring in stainless or Ti¹

Titanium Lap Joint Flange

Item	Range / Note
Nominal Size (NPS)	½″–12″ (DN15–DN300)
Pressure Class	150 / 300 in stock; 400 / 600 on request (verify via ASME B16.5 App A)
Stub End Grade	Gr 2 stock ½″–8″; >8″ and Gr 7 MTO 4–6 wk
Ring Material	304 / 316L / 2205 / Gr 2 / Gr 5 (use 316L/2205 for wet chlorine & offshore)
Stub Style	MSS SP-43 short / ASME B16.9 long
Tests & Docs	100 % PMI, UT/PT; EN 10204 3.1 MTC
Lead Time	Gr 2 ≤ 7 d; custom 15 d

Feature	Lap-Joint Ti	Slip-On Ti	Weld-Neck Ti
Corrosion cost	★★★★★	★★★★	★★★
Maintenance ease	★★★★★	★★★	★★
Lined pipe friendly	Excellent	Fair	Poor
High-pressure duty	Medium (≤ 600)	Medium	High
Up-front cost	Low-Medium	Medium	High

Sector / Media	Recommended Set-up	Typical Benefit
Wet chlorine	Gr 7 stub + 316L/2205 ring	Ring immune; swap stubs every 3 yrs
Seawater/OFFSHORE	Gr 2 stub + 316L ring	25–30 % cheaper than all-Ti flanges
PTFE-lined pipe	Gr 2 stub + 304 ring	Media touches only PTFE & Ti; zero ion pickup

Welding – full-penetration GTAW of stub to pipe (ASME B31.3)

Ring Protection – select stainless or Ti for corrosive atmospheres; coat threads with anti-gall paste for reuse

Bolt Torque – follow ASME PCC-1 or gasket vendor tables; four-pass star pattern and re-torque after 24 h

Q: Is Class 600 feasible for lap joints?

A: Yes, provided ring section modulus meets ASME B16.5 App A and B31.3 stress limits.

Q: How many times can the ring be reused?

A: Multiple cycles under good corrosion protection and lubrication; actual count depends on bolt cycling and environment.