Should very small sampling valves or sampling devices be installed on fluorinated piping? And what about the sampling devices used for carbon steel piping?

A tetrafluoroethylene pipe with a tee, along with a sampling valve at the bottom; it is opened during sampling and closed when not sampling. Carbon steel or stainless steel; a tee fitting can be used, or it’s not necessary either. An opening can be made directly on the pipe, along with a small valve – it is opened for sampling and closed when sampling is not required. A plug should be placed on top of the small valve.

The design principles for fluorinated pipe sampling valves or sampling devices are to ensure accuracy and reliability during the sampling process, as well as to facilitate easy implementation. Generally, sampling valves or sampling devices used on fluorinated-lined pipes need to have the following characteristics: 1. Valve body material: The valve bodies of sampling valves or sampling devices on fluorinated-lined pipes are usually made of polytetrafluoroethylene (PTFE) or other corrosion-resistant materials, to ensure their ability to withstand corrosive substances such as strong acids and strong bases. 2. Safety: The sampling valve or sampling device should have good sealing properties to prevent leaks of the medium, which could lead to accidents and contamination. At the same time, safety factors to prevent equipment damage caused by excessive pressure must also be taken into account. 3. Sampling adaptability: The sampling valve or sampling device should be able to operate under various pressure, temperature, and medium conditions, possessing a certain degree of adjustability and adaptability. 4. Ease of operation: The structural design of the sampling valve or sampling device should be simple and practical, enabling easy sampling operations while ensuring the accuracy and effectiveness of sampling. As for the sampling devices on carbon steel pipes, sampling joints or sampling flanges can generally be used. These sampling devices also need to have corrosion resistance and good sealing properties to meet the sampling requirements. At the same time, design and selection also need to be based on specific process conditions and medium properties. .

Sampling ports should be installed on fluoropolymer-lined pipes, and their locations must be determined in advance along with the necessary connections, as welding is not allowed on such pipes