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Water (t≤95℃) lines
Welded steel, seamless steel, galvanized steel, nodular
cast iron, composited aluminum and plastic (PAP1,
XPAP2, RPAP5), PB, PE-X
Water (t≤60℃) lines
Welded steel, seamless steel, galvanized steel, PP-R,
composited aluminum and plastic (PAP1, XPAP2,
RPAP5), PB, PE-X, PE-RT
Cooling wter lines
Welded steel, seamless steel, galvanized steel, nodular
cast iron
Drain lines
PVC,UPVC
Condensation lines
Galvanized steel, PE, PVC, UPVC
5.2.3.2 Insulation
Typically the refrigerant copper tubes, air ducts, chilled water tubes and condensation tubes
should be thermally insulated by the commonly used plastic insulation rather than glass wool,
PE or PEF.
Diameter(mm)
Gas-expanded Rubber
Glass Wool
Ⅰ Ⅱ Ⅰ Ⅱ
DN15～DN25 ＞15mm ＞20mm ＞30mm ＞30mm
DN32～DN50 ＞25mm ＞30mm ＞35mm ＞35mm
DN65～DN80 ＞30mm ＞35mm ＞35mm ＞40mm
≥DN100 ＞35mm ＞40mm ＞40mm ＞45mm
Note: under the tropical climate, the insulation should be thickened or doubled.
A Series Modular-type Air-cooled (Heat Pump) Chiller
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