Precautions for installation and commissioning of paper machine equipment The test time of the load operation is not less than 8 hours. After the paper machine works normally, there is no abnormal noise in the whole machine, and there is no air leakage at the connection of each pipe. After the test machine, the pipe connection is tightened again and it can be put into normal use. Suitable for gas, air, heavy oil, petroleum, chemicals, etc.