Ratnakar Industries

A stainless steel stub end is a type of pipe fitting used in conjunction with lap joint flanges to create a detachable connection point in a piping system. It's a non-standard connection method often used in situations where frequent dismantling of the pipeline is required for maintenance or inspection. Stub ends are commonly made from stainless steel due to its corrosion resistance and durability.

Here are the key features and points to know about stainless steel stub ends:

1. Purpose: A stub end is used to create a loose, non-permanent connection between two pipes or fittings. It's typically used in low-pressure and low-temperature applications where the pipeline might need to be easily disassembled.

2. Connection Type: Stub ends are used with lap joint flanges. A lap joint flange is fitted with a stub end, and the joint is made by sliding the stub end flange over the pipe end and then bolting it to the main flange. This arrangement allows for easy assembly and disassembly of the joint without having to unbolt the main flange.

3. Types of Stub Ends:

   • Short Pattern Stub End: This type is used when space is limited and is suitable for applications with light to moderate loading.

   • Long Pattern Stub End: This type provides a longer flange face, making it more suitable for applications with higher loads or in cases where additional reinforcement is needed.

4. Corrosion Resistance: Stainless steel is commonly used for making stub ends due to its excellent corrosion resistance, making it suitable for various environments and conveying fluids.

5. Materials and Grades: Stub ends are often made from stainless steel grades like 304 (A2) and 316 (A4) due to their corrosion resistance properties.

6. Sizes and Dimensions: Stub ends are available in various sizes and dimensions to match the pipe's diameter and the requirements of the application.

7. Advantages:

   • Easy assembly and disassembly without disturbing the main flange.
   • Suitable for applications requiring frequent maintenance or inspection.
   • Can be used to connect pipes made from different materials.

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