Ratnakar Industries

A stainless steel stub end, also known as a stub end flange or a lap joint stub end, is a type of pipe fitting used in conjunction with a lap joint flange to create a detachable connection point in a piping system. It's particularly useful in situations where frequent dismantling or maintenance of the pipeline is required. Stainless steel stub ends are chosen for their corrosion resistance and durability, making them suitable for various industries and applications.

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

1. Purpose:

   • Detachable Connection: A stub end is used with a lap joint flange to create a joint that can be easily assembled and disassembled without having to unbolt the main flange. This is advantageous for systems that require regular inspection or maintenance.

   • Alignment: Stub ends help align pipes and compensate for small variations in pipe length.

2. Components:

   • Stub End: The stub end is a short piece of pipe with one end that is flared out and has a collar. It fits into the larger opening of the lap joint flange.

   • Lap Joint Flange: The lap joint flange has a flat face and a raised ring or "stub face." The stub end is placed against the stub face, and the assembly is secured with bolts.

3. Materials and Grades: Stainless steel stub ends are typically made from stainless steel grades such as 304 (A2) and 316 (A4) due to their corrosion resistance properties.

4. Applications:

   • Frequent Disassembly: Stub ends are commonly used in applications where the pipeline needs to be frequently taken apart, such as systems requiring regular maintenance or those subject to changes in process.

   • Non-Metallic Piping: Stub ends can be used to connect metal pipes to non-metallic pipes or to transition between different types of materials.

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

6. Corrosion Resistance: Stub ends are used in applications where corrosion resistance is crucial, such as those involving moisture, chemicals, or corrosive substances.