DIN 2527 Titanium Blind Flange: A Detailed Overview

A DIN 2527 titanium blind flange is a type of flange designed according to the German standard DIN 2527, primarily used in piping systems to close the end of a pipeline. These flanges are made from titanium, a material known for its superior strength-to-weight ratio, excellent corrosion resistance, and ability to withstand extreme conditions. Ladhani Metal Corporation is a leading supplier and manufacturer of DIN 2527 titanium blind flanges, offering high-quality products suitable for a wide range of industrial applications. Titanium Blind Flanges are an essential component in piping systems, used to close the end of a pipeline or vessel. These flanges are made from titanium, a material known for its exceptional strength-to-weight ratio, superior corrosion resistance, and ability to perform well under extreme conditions, including high temperatures and aggressive environments.

Composition of Titanium for DIN 2527 Flanges

Titanium alloys are commonly used in industries where corrosion resistance, strength, and light weight are paramount. Two popular titanium grades are Grade 2 (CP Titanium) and Grade 5 (Ti-6Al-4V), each with distinct properties due to their composition.

Key Properties:

• Density: 4.43 g/cm³
• Tensile Strength: Around 540 MPa for Grade 2, and up to 900 MPa for Grade 5
• Corrosion Resistance: Titanium alloys offer exceptional resistance to corrosion, especially in marine and chemical environments.
• Heat Resistance: Titanium flanges maintain their strength at higher temperatures, making them suitable for high-temperature applications.

. Here's the detailed composition of both grades:

1. Titanium Grade 2 (CP Titanium)

Titanium Grade 2, also known as commercially pure titanium (CP titanium), is one of the most commonly used grades in industries due to its excellent combination of strength, formability, and corrosion resistance.

Chemical Composition of Titanium Grade 2:

• Titanium (Ti): 99.2% min
• Aluminum (Al): 0.10 - 0.40%
• Iron (Fe): 0.30% max
• Oxygen (O): 0.18 - 0.40%
• Carbon (C): 0.08% max
• Hydrogen (H): 0.015% max
• Other Elements: Trace amounts of nickel (Ni), vanadium (V), and molybdenum (Mo) may be present in minimal quantities.

Key Properties of Titanium Grade 2:

• Tensile Strength: ~ 345 MPa
• Yield Strength: ~ 275 MPa
• Elongation: ~ 20% (good ductility)
• Density: 4.51 g/cm³
• Corrosion Resistance: Excellent in acidic, neutral, and marine environments.
• Weldability: Excellent weldability.

2. Titanium Grade 5 (Ti-6Al-4V)

Titanium Grade 5, also known as Ti-6Al-4V, is the most commonly used titanium alloy in applications requiring higher strength and improved heat resistance.

Chemical Composition of Titanium Grade 5:

• Titanium (Ti): 90.0 - 94.0%
• Aluminum (Al): 5.5 - 6.75%
• Vanadium (V): 3.5 - 4.5%
• Iron (Fe): 0.25% max
• Oxygen (O): 0.13% max
• Carbon (C): 0.08% max
• Hydrogen (H): 0.015% max

Key Properties of Titanium Grade 5 (Ti-6Al-4V):

• Tensile Strength: ~ 900 MPa
• Yield Strength: ~ 830 MPa
• Elongation: ~ 10-15% (lower than Grade 2, but still ductile)
• Density: 4.43 g/cm³
• Corrosion Resistance: Excellent, though slightly lower than Grade 2.
• Heat Resistance: Can withstand temperatures up to ~400°C.
• Weldability: Good, but requires proper welding techniques.

Types of DIN 2527 Titanium Blind Flanges

DIN 2527 titanium blind flanges are categorized based on their construction type and pressure class. Some of the most common types include:

a. Flat Face Blind Flanges

These flanges have a flat sealing surface, which is flush with the pipe end. The flat face is ideal for applications with low pressure and ensures a tight seal.

b. Raised Face Blind Flanges

These have a raised portion around the bolt holes. This type is typically used in higher-pressure applications, and the raised face improves the sealing capabilities.

c. RTJ (Ring-Type Joint) Blind Flanges

In RTJ blind flanges, a metal ring is used for sealing between the flange faces. This type is used in more demanding conditions, particularly for high-pressure and high-temperature systems.

d. Weld Neck Blind Flanges

These flanges are welded directly to the pipe, offering stronger structural support and are used in applications where strength and reliability are crucial.

Dimensions of DIN 2527 Titanium Blind Flanges

The dimensions of DIN 2527 titanium blind flanges are standardized to ensure compatibility across different systems and applications. These dimensions depend on the nominal pipe size (DN) and pressure rating.

Key Dimension Parameters:

• Nominal Diameter (DN): The nominal diameter refers to the pipe size that the flange is designed to fit. This can range from DN 10 to DN 600 or more.
• Bolt Hole Pattern: The number, size, and spacing of bolt holes vary depending on the nominal pipe size and pressure rating.
• Thickness (t): The thickness of the flange is proportional to the pressure rating and nominal pipe size. The greater the size and pressure rating, the thicker the flange.
• Outer Diameter (OD): The outer diameter typically increases with the pipe size. For example, a DN 100 blind flange would have an outer diameter of about 220 mm, while a DN 600 flange may have an outer diameter of approximately 1,200 mm.
• Bolt Circle Diameter (BCD): This is the diameter of the circle on which the bolt holes are placed. It is also proportional to the nominal pipe size.
• Number of Bolt Holes: Commonly 4 to 12 bolts depending on the flange size.