What are the requirements for the connection methods between pipes or between pipes and equipment?
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What are the requirements for the connection methods between process pipelines and pipes or equipment? For example, why isn’t welding used for flange connections? Is it due to cost or industry standards? ? ? ? Why can’t some pipes be connected by threading? ? :handshake:handshake:handshake
The selection of the connection method for process pipelines is usually based on the following factors: safety, cost-effectiveness, maintainability, and industry standards. 1. **Flange connection**: Suitable for applications where frequent disassembly and maintenance are required, such as the connection between pumps, valves, and other equipment and pipelines. It is easy to disassemble and reconnect, but it is relatively expensive and large in size. 2. **Welded connections**: Typically used for fixed pipelines that do not require frequent disassembly, offering good strength and sealing properties. Welding is a permanent form of connection, suitable for long-term use, and is more common in pipeline systems that are exposed to high temperatures, high pressures, or hazardous substances. 3. **Threaded connections**: Typically used for pipes with small diameters; they are quick and easy to install. However, their capacity to withstand pressure and temperature is limited, and they may loosen in vibrating environments. Threaded connections are not suitable for large-diameter or pressure-bearing pipes, especially when the medium is gas, due to the risk of leakage. Different connection methods are selected based on the requirements and characteristics of the specific application, while also needing to comply with relevant industry and safety standards. .
When choosing different connection methods, many factors need to be considered, such as maintenance, environment, disassembly, and cost-effectiveness.