In order to effectively solve the defects such as over-twisting, connection sinking, and subsequent leakage in the assembly of traditional ferrule type pipe joints, and improve the sealing efficiency, the assembly process steps of ferrule type pipe joints are now standardized:
1. Blanking
Saw the steel pipe vertically to the desired length. Relatively speaking, a 1/2° error is allowed with respect to the axis of the steel pipe. Never use pipe cutters or cut-off wheels, as this can cause severe burrs and off-cuts, and a stationary toothless saw is recommended.
2. Slightly deburr the pipe end and clean the steel pipe
Deburring (max. 0.2 x 45°) Clean the pipe end assembly (at least twice the length of the nut) free of debris, dirt and paint.
3. Marking and Preloading
Fix the joint body firmly on the vise, and the steel pipe needs to be fixed vertically and inserted into the end face of the joint body. Tighten the nut by hand until the ferrule clamps the tube and feel a noticeable increase in torque (pressure point). To ensure the correct number of tightening turns, the nut, joint and steel pipe must be marked, and the nut should be tightened with a wrench for 1 to 1 turn. It is recommended that the steel pipe be pre-installed to about 1? circle.
4. Check
Check the depth of penetration of the cutting edge. A ring of material should be visible in front of the toothed ferrule cutting edge. The toothed ferrule can be rotated on the steel pipe, but cannot be displaced axially.
5. Final assembly of the connector body
Tighten the nut until the required torque increases significantly, and then tighten the nut by 1/6 to 1/4 turn during final assembly.
6. Reinstall
Each time the fitting is disassembled, the nut must be retightened with the same torque required for final assembly.