Titanium Threaded Union
Titanium three-piece threaded unions supplied by grade, NPS, thread standard, sealing arrangement, pressure-design basis, inspection and traceable documentation.
- Material
- Titanium Grade 2, Grade 7 or Grade 12 as specified
- Product Standard
- ASME B16.52 for covered titanium forged threaded fittings; approved order controls
- Dimensions
- ASME B16.52 and ASME B1.20.1 NPT, or approved drawing
- Documents
- MTC, dimensions and heat/lot traceability
Product Detail
Product Introduction
Titanium threaded unions are separable three-piece fittings used where connected piping or equipment must be disconnected without rotating long pipe sections. A complete order defines titanium grade, NPS, thread at each end, union-seat and sealing arrangement, assembly orientation, pressure and temperature basis, service medium, inspection and traceability.
When is a titanium threaded union preferred?
Selection answer: A threaded union provides a separable connection that can be disconnected without rotating the connected pipe. The complete assembly includes compatible threaded ends, a union nut and an approved sealing interface.
Selection boundary: A union is not the same product as a simple coupling. Seat geometry, gasket or metal-to-metal seal, thread system, pressure-temperature duty, assembly orientation and replacement-part compatibility must be defined.
RFQ data to confirm: Provide grade, thread standard and sizes, union pattern, seat and sealing method, pressure and temperature, medium, quantity, required component materials, inspection and certificates.
Product Specifications
| Product | Titanium Threaded Union | Material Options | Titanium Grade 2, Grade 7 or Grade 12 as specified |
|---|---|---|---|
| Forms | Three-piece threaded union with two end pieces and a central union nut; seat and sealing arrangement by approved order | Typical Inquiry Range | NPS 1/8 to 4 typical inquiry range; availability depends on grade, pressure class and configuration |
| Product Standard | ASME B16.52 for covered titanium forged threaded fittings; approved order controls | Dimensional Basis | ASME B16.52 and ASME B1.20.1 NPT, or the expressly specified thread standard |
| Wall | Schedule or nominal wall thickness matched to the connected pipe and design | Ends | Female NPT ends typical; male, BSPT/BSPP or drawing-specific ends only when expressly ordered |
| Manufacturing | Seamless, welded, formed, forged, machined or fabricated as specified | Surface | Pickled, cleaned, machined or project-specific finish |
| Inspection | Visual, dimensions, wall, ends and specified NDT | Documents | MTC, heat/lot traceability and inspection report |
Typical ranges are quotation guidance, not a stock guarantee. Final availability and tolerances are confirmed against the complete RFQ and design code.
Selection and Configuration
- Separable connection: Use a union where maintenance requires disconnection without rotating the connected pipe or equipment.
- Seat and sealing arrangement: Define metal-seat, gasket or project-specific sealing details together with compatible mating components.
- Thread and assembly control: State the thread designation, gaging, engagement, orientation, sealant or lubricant and anti-galling procedure.
Send the piping specification or drawing
Include grade, NPS or OD, wall/schedule, geometry, ends, quantity, tests and documents.
Chemical Composition
Weight percent; maximum unless a range is shown. Titanium is the balance. The ordered grade controls.
| Grade / UNS | Pd | Mo / Ni | Fe | O | C | N | H | Ti |
|---|---|---|---|---|---|---|---|---|
| Grade 2 / R50400 | — | — | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 7 / R52400 | 0.12–0.25 Pd | — | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
| Grade 12 / R53400 | — | 0.20–0.40 Mo; 0.60–0.90 Ni | 0.30 | 0.25 | 0.08 | 0.03 | 0.015 | Balance |
Mechanical Properties – Annealed Source Material Reference
| Grade | Ultimate Tensile Strength min | 0.2% Yield Strength min | Elongation min |
|---|---|---|---|
| Grade 2 | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20% |
| Grade 7 | 345 MPa (50 ksi) | 275 MPa (40 ksi) | 20% |
| Grade 12 | 483 MPa (70 ksi) | 345 MPa (50 ksi) | 18% |
Representative wrought-source material minima. Fitting acceptance, heat treatment and test specimens must follow the ordered material/product specification and size.
Typical Physical Properties
| Grade | Density | Elastic Modulus | Thermal Conductivity | Thermal Expansion |
|---|---|---|---|---|
| Grade 2 | 4.51 g/cm³ | Approx. 105 GPa | Approx. 16.4 W/m·K | Approx. 8.6 µm/m·K |
| Grade 7 | Approx. 4.51 g/cm³ | Approx. 105 GPa | Approx. 16 W/m·K | Approx. 8.6 µm/m·K |
| Grade 12 | Approx. 4.54 g/cm³ | Approx. 103 GPa | Approx. 16 W/m·K | Approx. 8.6 µm/m·K |
Typical engineering references, not inspection acceptance limits.
Certificates & Inspection Records
Services We Can Provide
Product Packaging
Fittings are capped or wrapped to protect clean ends, bevels, threads and machined faces. Items are separated by grade, size and heat/lot, then packed in reinforced cartons or export cases according to geometry and quantity.
Application Scenarios
Chemical Processing
Corrosion-resistant piping for acids, chlorides and process media after grade compatibility review.
Power & Energy
Cooling-water, condenser and auxiliary piping requiring traceable titanium components.
Marine & Desalination
Seawater and chloride-bearing piping systems designed for the selected titanium grade.
FAQ
What information is required to quote Titanium Threaded Union?
Provide the titanium grade, product form, dimensional standard or drawing, thread or critical dimensions, quantity, surface treatment, mating parts, service conditions and required inspection documents.
Which standards apply to Titanium Threaded Union?
ASME B16.52 applies to covered titanium and titanium-alloy forged threaded fittings. ASME B1.20.1 may define NPT threads when invoked. The approved purchase order must also state the titanium grade, union-seat configuration, pressure and temperature basis, service medium, inspection and documentation.
How are Titanium Threaded Union inspected?
Review MTC and heat/lot traceability; verify union components, NPS, thread form and gaging, seat and sealing surfaces, assembly fit, critical dimensions, cleanliness and any specified pressure or leak test.
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