How to perform a pressure test on geological drilling pipes

Geological drilling pipes are subjected to a certain amount of pressure during underground operations. Therefore, after production, these pipes must undergo a pressure test. Only products that meet the relevant standards are considered qualified. Unqualified products must be returned to the factory for reprocessing.

Geological drilling pipes are subjected to pressure during underground operations. Therefore, after manufacturing, these pipes undergo a pressure test. Only those meeting the relevant standards are considered qualified; unqualified products must be returned to the factory for reprocessing. So, how are these pipes pressure tested? The following details the pressure testing method.

　　1. The pressure test should be conducted before backfilling the geological drilling pipe. Secure the pipe in place, covering sections of the pipe with soil at intervals.

　　2. After completely removing air from the pipe, increase the pressure to the required value at a stable rate. The pressure gauge should be placed as low as possible on that section of pipe.

　　3. During the pressure test, the flange connections of the pipe should be exposed for leak inspection.

　　4. After the system stabilizes, increase the pressure to 1.5 times the working pressure and hold it for 1 hour. Carefully observe the pressure gauge and patrol the line. If no visible leaks or significant pressure drops occur during the test, the pipe passes the pressure test.

　　After production, geological drilling pipes can be pressure tested using the above method. During the test, check for leaks. Address any issues promptly and retest after resolution.