30
REFRIGERANT PIPING
ENGLISH
Pipe thickness standard for R410A piping
Diameter
R410A
Soft Hard
Tolerance
(permissible difference)
(Unit: mm)
Ø 6.35(1/4) 0.7 0.8 ±0.06
Ø 9.52(3/8) 0.8 0.8 ±0.06
Ø 12.7(1/2) 0.8 0.8 ±0.06
Ø 15.88(5/8) 1 1 ±0.09
Ø 19.05(3/4) 1 ±0.09
Ø 22.2(7/8) 1 ±0.09
Ø 25.4(1) 1 ±0.09
Ø 28.58(1-1/8 ) 1 ±0.09
Ø 31.8(1-1/4) 1.1 ±0.09
Ø 34.9(1-3/8) 1.2 ±0.09
Ø 38.1(1-1/2) 1.35 ±0.09
Ø 41.3(1-5/8) 1.45 ±0.09
Ø 44.45(1-3/4) 1.55 ±0.09
Ø 53.98(2-1/8) 2.1 ±0.09
▲Soft (Pan Cake) ▲ Hard (straight tubes)
Note 3) General location: When the pipe passes indoors where the indoor unit is not operated
- Hall way etc. (Dormitory, school, office-tel)
Note 4) Negative condition: When below conditions 1 and 2 are met.
1 When the pipe passes indoors where the indoor unit is not operated
2 When the humidity is high, regionally, and there is no air flow in the pipe passing area
- When installing the outside unit within the outside pipe tray or at a location where it
is ok to have freezes, apply 13t.
- If you are not sure with the selection of heat insulation material, coordinate with the
supervision or HQ.
- The thickness of the above heat insulation material is based on the heat conductivity
of 0.088W/m°C.
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