The standards and steps for cleaning the oil fume pipeline are as follows:

1. Exterior cleaning: wipe the inner and outer cylinders of the pipeline with a clean towel at a temperature not lower than 31℃, so as not to affect the cleaning effect.

2. internal cleaning: add a proper amount of cleaning agent to the kitchen sewer pipe, so that the cleaning agent can be mixed with water and flow into the pipe for cleaning, with tools such as cleaning brushes, rags and pipe tongs to clean the oil stains and sediments inside the pipe.