ASME B16.5 Class 300 Grade 1 And Grade 2 Titanium Raised Face Weld Neck Flanges / WNRF For Water Supply Systems

ASME B16.5 Class 300 Grade 1 and Grade 2 Titanium Raised Face Weld Neck Flanges (WNRF) for Water Supply Systems

1. Basic Dimensions of Class 300 Raised Face Weld Neck Flanges (WNRF)

The following table outlines the standard dimensions for Class 300 Raised Face Weld Neck Flanges (WNRF) across various nominal pipe sizes (NPS), based on ASME B16.5 standards.

2. Titanium Grades: Material Properties of Grade 1 and Grade 2 Titanium

Here’s a more detailed table to compare the material properties of Grade 1 and Grade 2 titanium alloys, which are commonly used in the manufacturing of Class 300 raised face weld neck flanges (WNRF).

• Grade 1 Titanium is more corrosion-resistant and less prone to fatigue but is less strong compared to Grade 2 Titanium. It is ideal for less critical applications.
• Grade 2 Titanium is stronger, making it suitable for higher pressure and more aggressive environments, often chosen for industrial water supply and municipal systems.

3. Bolt Size and Torque Specifications for Class 300 Titanium Flanges

Proper bolt selection and torque application are essential to ensure a secure, leak-free connection between flanges. The table below provides the bolt size and the torque values for Class 300 Raised Face Weld Neck Flanges (WNRF) made from Grade 1 and Grade 2 titanium.

• Note: Torque values should be adjusted depending on the gasket material used, as titanium has low friction, requiring specific torque values to ensure effective sealing.

4. Pressure Ratings for Titanium Flanges

The pressure rating of a Class 300 flange indicates the maximum pressure the flange can withstand safely. Below is the pressure rating table for Grade 1 and Grade 2 titanium flanges based on the ASME B16.5 Class 300 standard.

• Note: The pressure rating remains constant for Class 300 flanges regardless of material grade. The titanium grades mainly affect corrosion resistance and strength, particularly in environments prone to aggressive chemicals or high chloride concentrations.

5. Cost Comparison of Grade 1 and Grade 2 Titanium Flanges

While both Grade 1 and Grade 2 titanium flanges offer excellent corrosion resistance, there is typically a difference in material cost. Below is a general cost comparison based on material selection:

• Grade 2 titanium is generally more expensive due to its higher strength and improved mechanical properties, making it suitable for more demanding applications in water supply systems.

6. Advantages of Using Titanium Flanges in Water Supply Systems

• Corrosion Resistance: Titanium is exceptionally resistant to both freshwater and seawater corrosion, making it ideal for water supply systems exposed to various chemical and environmental conditions.
• Long-Term Durability: Titanium flanges can withstand harsh operating conditions, ensuring longer service life and reduced maintenance costs compared to other materials like carbon steel or stainless steel.
• Strength-to-Weight Ratio: Titanium provides high strength while remaining lightweight, ensuring easier handling and installation.

Conclusion

The ASME B16.5 Class 300 Raised Face Weld Neck Flanges (WNRF) made from Grade 1 and Grade 2 titanium are ideal choices for water supply systems requiring reliable, corrosion-resistant, and high-strength components. The detailed tables above, showcasing dimensions, material properties, torque specifications, and pressure ratings, provide a comprehensive guide for engineers and designers in selecting the right flange type for their specific applications.

By choosing the appropriate Grade 1 or Grade 2 titanium based on the system’s requirements and considering the cost, strength, and corrosion resistance, designers can ensure the longevity and efficiency of the water supply system.