Requirements for Pipeline Valve Arrangement

 

General Requirements

1. The industrial valve should be located in a place that is easy to operate, install, and maintain. The valves on rows of pipelines (such as those entering and exiting the device) should be centrally arranged to facilitate the installation of operating platforms and ladders.

2. Some valve positions have process operation requirements and locking requirements, and should be arranged and marked according to the PID instructions.

3. Valves on the bottom pipelines of equipment such as towers, reactors, and vertical vessels should not be arranged within the cluster.

4. Manual ball valves that need to be operated according to the instructions of the local instrument should be located close to the local instrument.

5. The regulating valve and safety valve should be arranged on the ground or platform in a place convenient for maintenance and debugging.

6. Fire hydrants or valves for fire protection should be located in a location that can be safely accessed in the event of a fire.

7. The valves of buried pipelines should be located in the valve well and have room for maintenance.

8. Valves should be located in areas with low thermal displacement.

9. When there are bypass or offset transmission components on the valve (such as gear transmission valves), sufficient installation and operation space should be left for the bypass or offset components.


Location Requirements

1. The installation height of the valve stem centerline on the vertical pipe should be within the range of 0.7 to 1.6m above the ground or platform. Valves with DN40 and below can be arranged at a height of less than 2m. When the position is too high or too low, a platform or control device, such as a sprocket or extension rod, should be installed for easy operation.

2. When there are very few valves that are not frequently operated and their operating height is not more than 2.5m from the ground, and it is inconvenient to set up another platform, portable ladders or mobile platforms should be used to enable people to operate.

3. The center of the valve handwheel arranged around the operating platform should not be greater than 400mm from the edge of the operating platform. When the valve stem and handwheel extend above the platform and the height is less than 2 meters, it should be ensured that they do not affect the operation and safety of the operator.

4. When the valves are arranged adjacent to each other, the clear distance between the handwheels should not be less than 100mm.

5. The valve stem should not be installed vertically or obliquely downwards.

6. For valves installed in trenches or valve wells that are frequently operated, when the handwheel is 300mm below the cover plate, an extension rod should be installed to make it within 100mm below the cover plate.

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