GENERAL
E385C
W5-1-15
Assembly of joints and gaskets for piping
JP30002010102007
1.
Tightening torque of joints
Unit : N
⋅
m{kgf
⋅
cm, lbf-ft}
2.
Joint assembly procedure and subsequent inspection
(1)
Before assembly, make sure that there is no dirt or burr on the seating surface (mating part, pipe joint,
gasket, etc.).
(2)
Since pipes have some degrees of freedom for assembly, the seating surface tends to incline. Tighten
pipes finally after temporary tightening to prevent leak.
(3)
After tightening, apply the specified pressure to each pipe joint to ensure that there is no leak.
(4)
Observe the values above for each tightening torque.
*When assembled soft washer # 4840FR-N (aluminum and rubber carbon pressure bonding) is loosened
or removed, be sure to replace it with a new part. This is not necessary for normal retightening.
Sealing method
Gasket sealing method
(Al Rubber or Copper)
Metal sealing method
(Flare pipe type, nipple connector type)
Tightening screw
size
Type A
Type B
M8
13 {130, 9}
M10
20 {200, 14}
11 {110, 8}
M12
25 {250, 18}
20 {200, 14}
M14
25 {250, 18}
31 {320, 23}
M16
29 {300, 22}
39 {400, 29}
M18
39 {400, 29}
59 {600, 43}
M20
*39 {400, 29}
64 {650, 47}
20 {200, 14}
M24
69 {700, 51}
M28
*127 {1300, 94}
