(1) The ferrule joint shall be pickled first for the pipes to be pickled as required;

(2) Cut the pipe with sawing machine or special pipe cutting machine according to the required length. It is absolutely not allowed to cut with melting (such as flame cutting) or grinding wheel; Remove burrs, metal chips and dirt on the inner and outer circles of the pipe end; Remove rust inhibitor and dirt from pipe joints; At the same time, ensure the roundness of the pipe;

(3) Insert the nut and ferrule into the pipe successively. The front edge (small diameter end) of the ferrule shall be at least 3mm away from the pipe opening, and then insert the pipe into the conical hole in the connector until it is pushed;

(4) Slowly tighten the nut and turn the pipe until it does not move, and then tighten the nut for 2 / 3 ~ 4 / 3 turns;

(5) Disassemble and check whether the ferrule has been cut into the pipe and whether the position is correct. There is a slight rotation of the clamp sleeve, which is not allowed to move axially;

(6) Tighten the nut again after passing the inspection.