Titanium Lap Joint Stub End - Precision Forged Fitting for Piping Systems
Titanium Lap Joint Stub Ends from TSM Technology are precision-forged pipe fittings designed to work with lap joint flanges, providing a cost-effective and corrosion-resistant joint solution for a wide range of piping systems. Manufactured from high-purity titanium alloys, these stub ends allow easy alignment and secure clamping without welding on the flange face, making them particularly suitable for systems where frequent dismantling, inspection, or maintenance is required. At TSM Technology, we leverage advanced melting, forging, and cold/hot processing capabilities to produce titanium stub ends with uniform wall thickness, dimensional accuracy, and smooth internal surfaces. Our products are manufactured in compliance with recognized international standards such as ASTM, ASME, and EN, and supported by stringent quality control processes to ensure consistent performance in demanding environments.
What is a Titanium Stub End?
A titanium stub end is a critical component used in conjunction with a lap-joint flange to create a versatile, cost-effective, and easy-to-maintain piping connection. In this setup, the stub end is butt-welded to the titanium pipe, while a loose backing flange provides the bolting pressure. This design allows the flange to rotate freely for easy bolt-hole alignment, significantly reducing installation time and labor costs.
At TSM Technology Co., our titanium pipe stub ends are manufactured to ensure a perfect seal and long-term durability. We offer three primary types based on industry needs:
•Type A: Designed for use with standard lap-joint flanges, featuring a machined radius to match the flange's fillet.
•Type B: Suitable for standard slip-on flanges acting as backing flanges.
•Type C: A flexible option that can be used with both lap-joint and slip-on flanges, often fabricated from pipe segments for cost efficiency.
By separating the wetted surface (the titanium stub) from the mechanical fastener (the steel flange), industries can maintain the superior corrosion resistance of titanium where it matters most while optimizing the overall project budget.
Why Trust TSM
Guaranteed Material Purity
We eliminate the risk of subpar alloys by providing full MTC (Material Test Certificates) according to EN 10204 3.1 for every batch.
Global Supply Reliability
As experienced suppliers, we maintain a large stock of Grade 2 stub ends to ensure short lead times for urgent project repairs.
Complex Customization
Our engineering team specializes in **custom titanium pipe stub ends**, handling non-standard lengths and high-pressure schedules.
Rigorous Quality Testing
Every fitting undergoes NDT (Non-Destructive Testing), including ultrasonic and liquid penetrant tests, ensuring zero-leak performance.
Technical Specifications & Industry Standards
Standard Dimensions (ASME B16.9 / MSS SP-43)
TSM manufactures titanium stub ends in both Short Pattern (MSS) and Long Pattern (ANSI) configurations. The choice typically depends on the space constraints of your piping layout and the specific requirements of the backing flange.
| Feature | Specification Details |
| Size Range | 1/2" (DN15) to 24" (DN600) and larger |
| Wall Thickness | Sch 10S, Sch 40S, Sch 80S, Sch 160, XXS |
| Face Finish | Serrated Spiral (ASME B16.5) or Smooth Finish |
| Type | Type A, Type B, Type C |
Quick Sizing Reference (Partial)
| 1" Sch 10S Stub End | 2" Sch 40S Stub End | 4" Sch 10S Stub End |
| Outside Dia 33.4 mm | Outside Dia 60.3 mm | Outside Dia 114.3 mm |
| Lap Dia 50.8 mm | Lap Dia 92.1 mm | Lap Dia 157.2 mm |
| Short Length 50.8 mm | Short Length 63.5 mm | Short Length 76.2 mm |
| Long Length 101.6 mm | Long Length 152.4 mm | Long Length 152.4 mm |
Titanium Material Grades
Material selection is the most critical step in ensuring the longevity of your titanium lap-joint stub end. TSM provides a wide range of Commercially Pure (CP) and Alloyed grades:
•Grade 2 (UNS R50400): The workhorse of the chemical industry. Offers an excellent balance of strength, ductility, and weldability.
•Grade 7 (UNS R52400): Palladium-enhanced for superior resistance to crevice corrosion in reducing acid environments.
•Grade 12 (UNS R53400): A high-strength alloy containing Molybdenum and Nickel, ideal for high-temperature applications.
•Grade 5 (Ti-6Al-4V): Primarily for aerospace and high-pressure subsea equipment where extreme strength-to-weight ratios are required.
Pressure Class Compatibility
Our stub ends are designed to integrate seamlessly with flanges across all major pressure classes:
•Class 150: General industrial use.
•Class 300 & 600: Typically used with Short Pattern (MSS) stub ends.
•Class 900 to 2500: High-pressure applications usually require Long Pattern (ANSI) stub ends for additional weld-neck stability.
Custom Titanium Pipe Stub Ends: Engineered for Your Project
Standard sizes don't always fit unique engineering challenges. TSM Technology Co. offers a dedicated OEM service for custom titanium pipe stub ends. Our capabilities include:
•Custom Lengths: Extra-long straight sections for specific support requirements.
•Special Alloys: Fabrication using Grade 7 (Palladium) or Grade 11 for niche chemical environments.
•Heavy Wall Thickness: Manufacturing stub ends for Sch 160 or custom thicknesses exceeding standard industrial charts.
•Machined Gasket Surfaces: Custom spiral or concentric serrations tailored to your specific gasket materials.
FAQ
Can I use a carbon steel flange with a titanium stub end?
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Yes! This is the primary reason to use a titanium lap-joint stub end. The fluid only touches the titanium, allowing the use of an economical carbon steel backing flange.
What is the difference between Long and Short pattern stub ends?
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Short pattern (MSS) is more compact and used in tight spaces, while Long pattern (ANSI) is used for higher pressure classes and offers more room for welding.
Do you provide custom titanium pipe stub ends for seawater service?
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Absolutely. We recommend Grade 2 or Grade 7 for seawater applications, and we can manufacture custom sizes to match existing piping layouts.
Are TSM's stub ends seamless or welded?
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We provide both. For sizes NPS 6 and smaller, we typically supply seamless stub ends (ASTM B861). For larger sizes, we provide high-quality welded versions (ASTM B265) with 100% X-ray inspection of the seams.
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