Open position
When drilling, it is not allowed to be near the bend or elbow of the pipeline, where the stress is concentrated and it is easy to crack the pipeline.
Water supply situation
It can be opened without stopping water, but a gate valve must be installed on the expansion joint and closed in time after drilling.
Hole spacing requirement
When the same pipe is perforated, the minimum distance between two adjacent holes shall not be less than 7 times of the perforation aperture.
piercing die
When the aperture is less than 50mm, the pvc pipe drilling machine can be used to drill holes; when the aperture is greater than 50mm, the round knife can be used, and the red-hot hole can also be used at the pipe end. The aperture of the opening should not be greater than 1/2 of the original pipe diameter.