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IS 6392: Scope and Types of Flanges
1. Scope
IS 6392 is an Indian Standard that specifies the dimensions and design of steel pipe flanges. The scope of IS 6392 includes:
- Types of Flanges: The standard covers various types of steel pipe flanges used in different piping systems.
- Dimensions: Provides detailed dimensions for each type of flange, ensuring compatibility and standardization.
- Pressure Ratings: Specifies pressure ratings for the flanges, ensuring they can withstand specific pressure levels in various applications.
- Materials: Defines the material specifications for manufacturing the flanges, ensuring they meet required strength and durability standards.
- Design Specifications: Includes design aspects like raised face, flat face, and ring type joint to cater to different application needs.
2. Types of Flanges
IS 6392 covers several types of flanges, each suited to specific applications and pressure requirements:
Weld Neck Flanges:
- Used for high-pressure applications.
- Features a long tapered hub that is welded to the pipe, providing strength and reducing stress concentration.
- Suitable for critical applications where high integrity and reliability are essential.
Slip-On Flanges:
- These flanges are slipped over the pipe and then welded both inside and outside for added strength.
- Easier to align and install compared to weld neck flanges.
- Commonly used in low-pressure applications.
Blind Flanges:
- Used to close the ends of piping systems, having no bore.
- Ideal for pressure testing and isolating sections of a pipeline.
- Ensures safety by preventing flow in a piping system.
Socket Weld Flanges:
- The pipe is inserted into a socket in the flange and then welded.
- Provides a smooth bore and better flow characteristics.
- Suitable for small diameter high-pressure pipes.
Lap Joint Flanges:
- Used with stub ends, allowing for rotation and ease of alignment.
- Not directly welded to the pipe, making it suitable for applications where frequent dismantling is required.
- Beneficial in systems requiring frequent inspection and maintenance.
Threaded Flanges:
- These flanges are screwed onto the pipe without welding.
- Suitable for low-pressure applications where welding is not feasible or desirable.
- Allows for easy installation and removal.
Summary
IS 6392 ensures the standardization and quality of steel pipe flanges used in various piping systems. By covering different types of flanges and specifying their dimensions, pressure ratings, materials, and design specifications, IS 6392 helps maintain consistency, safety, and reliability in industrial applications.
