Blind flange
Precautions for use of blind plate:
1.Set as few blind plates as possible under the premise of meeting the technological requirements.
2. The blind plate set must be marked as normally open or normally closed. 3.Blind plate set in the upstream or downstream of the cut-off valve, should be based on the cutting effect, safety and technological requirements to determine.
Blind plate application parts:
1.In the original driving preparation stage, when the pipeline strength test or the tightness test is not carried out at the same time as the connected equipment, a blind plate is required at the connection between the equipment and the pipeline.
2.Connected to various process materials in the boundary area outside the boundary area. When the device is parked, if the pipe is still running, a blind plate is placed at the shut-off valve.
3.When the device is in multiple series, the total pipeline from the boundary area is divided into several series, and the manifold is placed at the shut-off valve of each branch.
4. When the device is to be regularly repaired, inspected or switched to each other, when the equipment involved needs to be completely isolated, a blind plate is placed at the shut-off valve.
5. When the pressurized pipeline, the replacement gas pipeline and the process pipeline are connected to the equipment, the it is installed at the shut-off valve.
6. The low point of equipment and pipelines is drained. If the process medium needs to be concentrated to a unified collection system, a blind plate is set after the valve is shut off.
7. The exhaust pipe, drain pipe and sampling pipe of equipment and pipeline should be provided with blind plate or wire plug after the valve. Except for non-toxic, non-hazardous and non-explosive materials.
8. When the device is built in stages, the interconnected pipes are provided with a blind plate at the cut-off valve for subsequent construction.
9. When the device is in normal production, some auxiliary pipes that need to be completely cut off should generally be provided with blind plates.
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