Saw off a suitable length of seamless steel pipe to remove port burrs. The end face of the steel pipe should be perpendicular to the axis, and the angle tolerance should not be greater than 0.5 degrees. If the steel pipe needs to be bent, the length of the straight line from the end of the steel pipe to the bending part should not be less than three times the length of the nut; put the nut and the ferrule on the seamless steel pipe. Pay attention to the direction of the nut and the ferrule, do not install it in reverse; apply lubricating oil on the thread and ferrule of the pre-assembled joint body, insert the steel pipe into the joint body, (the steel pipe must be inserted to the end) and tighten the nut by hand; tighten the nut Until the ferrule is stuck on the steel pipe, this turning point can be felt by the increase in tightening torque (pressure point); after the double-card tee joint reaches the pressure point, tighten the nut by 1/2 turn; remove the pre-assembled joint body, Check the insertion of the cutting edge of the ferrule, the visible raised band must fill the space at the front of the ferrule. The ferrule can be rotated slightly, but cannot be moved axially; for installation, apply lubricating oil to the thread of the joint body in the actual installation, and screw the compression nut with it until the sensible tightening force increases, and then tighten 1/ 2 turns are installed.
