General requirements for valve setting

1. Arrangement principle of valves

Valves shall be set according to the type and quantity shown on the pipeline and instrument flow diagram (PID). When the PID has specific requirements for the installation position of some valves, they shall be set according to the process requirements

The valve shall be arranged at a place easy to access, operate and maintain. Valves on rows of pipelines shall be arranged in a centralized manner, and operation platforms or ladders shall be considered

2. Installation position requirements of valves

When the pipes in and out of the device are connected with the main pipe on the pipe rack of the whole plant, cut-off valves must be set. The installation position of valves shall be centrally arranged on one side of the unit area, and necessary operation platform or maintenance platform shall be set

Valves requiring frequent operation, maintenance and replacement shall be located on the ground, platform or ladder. Pneumatic and electric valves shall also be arranged at easy access

Valves that do not need to be operated frequently (only used when starting and stopping) shall also be arranged where temporary ladders can be erected if they cannot be operated on the ground

Valves that do not require frequent operation (only used when starting and stopping). If it cannot be operated on the ground, it shall also be arranged where a temporary ladder can be erected. The height between the center of the valve handwheel and the operating surface is 750 ~ 1500mm, and the most suitable height is 1200mm. The installation height of the valve that does not need frequent operation can reach 1500 ~ 1800mm. When the installation height cannot be reduced and frequent operation is required, it shall be set in the design Set the operating platform or step. Valves on pipelines and equipment with hazardous media shall not be set within the height range of human head

Special statement: the above article only represents the author's own point of view