Titanium Stub End
Titanium Stub End supplied by titanium grade, outside diameter or NPS, wall thickness, end preparation, dimensional standard and inspection requirements for corrosion-resistant piping systems.
- Material
- Titanium Grade 2, Grade 7 or Grade 12 as specified
- Product Standard
- ASTM B363 / ASME SB363 where applicable
- Dimensions
- ASME B16.9, B16.11 or approved drawing
- Documents
- MTC, dimensions and heat/lot traceability
Product Detail
Product Introduction
Titanium stub ends form the process-wetted lap used with a rotatable backing flange. This family page covers the selection boundary: identify Type A, Type B or Type C where applicable, long or short pattern, titanium grade, NPS or OD, wall, lap outside diameter and thickness, face, radius, overall length, welding end and matching lap-joint flange.
How should a titanium stub end be matched to a lap joint flange?
Selection answer: A stub end provides the wetted lap and weld end used with a rotating backing flange. Select short or long pattern, lap geometry, outside diameter, wall or schedule and grade to match the connected pipe and flange assembly.
Selection boundary: The stub end and backing flange have separate material and dimensional functions. Their lap radius, thickness, facing contact, pipe bore, weld end and pressure design must be reviewed together.
RFQ data to confirm: Provide stub-end pattern, grade, NPS or OD, wall or schedule, overall length, lap diameter and thickness, corner radius, weld end, backing-flange details, service conditions, quantity, inspection and certificates.
Product Specifications
| Product | Titanium Stub End | Material Options | Titanium Grade 2, Grade 7 or Grade 12 as specified |
|---|---|---|---|
| Forms | Lap-joint stub end, Type A, B or C as specified | Typical Inquiry Range | NPS 1/2 to 24 typical inquiry range; lap and length by standard or drawing |
| Product Standard | ASTM B363 / ASME SB363 where applicable | Dimensional Basis | ASME B16.9, ASME B16.11 or approved drawing as applicable |
| Wall | Schedule or nominal wall thickness matched to the connected pipe and design | Ends | Butt-weld end with specified lap face |
| 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
- Complete lap-joint assembly: Review stub end, backing flange, gasket and bolting as one joint; the backing flange is not the wetted sealing lap.
- Stub-end form: State Type A, B or C when the invoked standard uses that designation, plus long or short pattern and manufacturing route.
- Mating dimensions: Coordinate pipe OD and wall, lap OD and thickness, corner radius, face finish, bore, weld end and backing-flange clearance.
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
Is a stub end used without a backing flange?
A lap-joint stub end normally provides the wetted lap while a compatible backing flange supplies the bolting load. The complete joint must be specified together.
Which dimensions are critical?
State pipe size and wall, lap OD and thickness, face and radius, length, bore, weld end and backing-flange clearance.
Does ASTM B363 alone define every stub end?
No. Invoke the material and fitting requirements plus the dimensional standard, type, pattern and all project-specific inspection and documentation.
Leave Your Message
Related Technical Guides
Titanium Butt Weld Fittings Purchasing Matrix
Define geometry, size, wall, ends, route and inspection.
Read technical guideHow to Choose a Titanium Grade
Compare titanium grades by corrosion environment, strength and application.
Read technical guideWhy Grade 7 Titanium Is Used in Acid Processing
Review palladium-alloyed titanium for demanding reducing-acid environments.
Read technical guideTitanium RFQ Checklist
Prepare grade, dimensions, quantity, standards, tests and documents.
Read technical guide