Titanium Threaded Flange
Updated : Aug. 12, 2025CP-Ti pits < 0.0005 mm/y.
Titanium is 55 % lighter than 316 L and, in Grade 5, 1.7× stronger (use Grade 5 only for seawater or inert media).
Screws on in minutes - no hot work, lines back in service within eight hours.
Key Specifications at a Glance
| Dimension | Range |
|---|---|
| Materials & grades | GR2 (general), GR5 (high‑pressure lightweight – not for wet chlorine), GR7 (wet chlorine / HCl) |
| Size & pressure | NPS ½″–4″, Class 150‑600 / PN 10‑40 |
| Threads | NPT (ANSI B1.20.1) & BSP (ISO 7‑1) |
| Facing | RF / FF |
| QC documents | EN 10204 3.1, 100 % PMI, UT/PT. SGS / BV witness from USD 400 per lot in China; other regions on request. |
| Lead time | Stock 3‑5 days; custom 12‑15 days |
*All weights shown in tables are theoretical, based on ρ = 4.51 g/cm³ and ASME B16.5 Type 5 rough forgings, tolerance ±10 % depending on facing and machining.
Titanium in Chlorine & Seawater Service
Pitting and Crevice Data
CP‑Ti corrodes <0.0005 mm/y at 25 °C in natural seawater; crevice corrosion starts above 80‑90 °C. Grade 7, alloyed with Pd, pushes the crevice threshold to *lab‑tested* 250 °C; typical operating limit is ≤150 °C.
Case: Five‑Year Chlor‑Alkali Turnaround
Grade 7 threaded flanges showed zero measurable attack after five years and 180 ppm free chlorine.
Case: 20‑Year RO Desalination Skid
A major Israeli RO plant has run Grade 7 flanges for two decades with no replacement or anode protection.
One‑Minute Selection Guide
| Fluid | First choice | Key reason |
|---|---|---|
| Seawater / RO / ultrapure | GR2 | Lowest cost, 15‑20 yr lifetime |
| Wet chlorine / HCl | GR7 | Pd alloy fights crevice corrosion |
| High pressure + weight saving | GR5 | 1.7× strength, 0.55× weight (not for wet chlorine) |
Quality Assurance You Can Audit
1. Raw‑material traceability by heat‑number and PMI.
2. Three‑step inspection: PMI → dimensional → UT/PT.
3. Third‑party witness available; costs start from \~USD 400 per lot ex‑China.
Installation & Maintenance Tips
Thread Sealants
Use pure PTFE tape or PTFE‑lined graphite; avoid copper‑ or zinc‑bearing compounds.
Torque & Leak Check
See Table 2‑1 for Class 150‑600 torque. Retorque 24 h after first assembly.
Lead Time & Logistics
| Type | Lead time | Packing & shipping |
|---|---|---|
| Stock | 3‑5 days | ISPM‑15 crates + PE wrap + desiccant |
| Custom | 12‑15 days | ≤50 kg airfreight; LCL sea for heavy loads |
Explore Our Full Titanium Flange Solutions
Beyond Titanium Threaded Flange products, Chalco Titanium provides a comprehensive range of titanium flange types to meet diverse piping and pressure system requirements. Our supply scope covers Titanium Weld Neck Flange, Titanium Lap Joint Flange, Titanium Slip On Flange, Titanium Blind Flanges, as well as the complete Titanium Flanges series for industrial and marine applications.
Backed by precision machining and strict quality control processes, we deliver reliable flange solutions with full material traceability and international standard compliance. Contact our technical team for assistance in selecting the most suitable flange type for your project.
FAQ (Schema‑ready)
Q: What is the maximum pressure rating?
A: Up to Class 600; above that, use weld‑neck or socket‑weld titanium flanges.
Q: Can I use PTFE tape on titanium threads?
A: Yes. PTFE is inert to titanium.
Q: Is Grade 5 suitable for wet chlorine?
A: No. Choose Grade 7 instead.
Q: Will titanium gall under repeated assembly?
A: Coat threads with a moly‑based anti‑seize to prevent galling.
Request Your 24‑Hour Quotation
Send mail **Size | Pressure | Medium | Qty** and get a detailed XLS in 24 h.Quick Quote
