How to drill holes in ASTM A53 seamless steel pipes?

　　Steel pipe manufacturers introduce to you the method of drilling ASTM A53 seamless steel pipes there are the following five points:

　　1. Use a special punching machine to drill the inner diameter of the steel pipe to the required specifications. Before drilling, the pipe should be inspected for cracks, folds, severe corrosion, and other defects. If there are any defects mentioned above, they must be removed before drilling.

　　2. On the punching machine, select the corresponding drill bit according to the steel pipe of the required specifications (usually a diamond-beaded electric drill bit with a diameter of 32mm or 40mm), then adjust the appropriate rotation speed and feed amount before starting drilling.

　　3. When the wall thickness of the steel pipe is less than 4mm, a small-diameter diamond bead-type electric drill bit can be used; if the wall thickness is greater than 4mm, a large-diameter diamond bead-type electric drill bit (such as Φ50) should be used.

　　4. During the drilling process, you should always pay attention to the situation at the bottom of the hole and adjust the speed and feed amount in time to prevent wire breakage.

　　5. When the steel pipe passes through the metal casing, the hollowing operation is completed.

　　When drilling ASTM A53 seamless steel pipes, it is strictly forbidden to use the electric hammer impact method to process and perforate seamless steel pipes with severe cracks; otherwise, the strength of the steel pipe will be destroyed and the service life will be affected. If defects such as cracks, heavy skin, scabs, etc. are found on the surface of the steel, or there are deep local scratches, electric hammer processing should also be avoided. (This method does not apply to seamless steel pipes made of cold-drawn and hot-rolled steel plates)