THEORITICAL VALUE OF DEW FORMATION

INSULATION CHARACTERISTICS OF INSULATION(DEW FORMATION CHARACTERISTICS)
丂丂	Dew formation characteristics of our products (*1)using Chemical Cross Linked 30 time Foamed Polyethylene shall be as follows:
	>	Relation between measured value and theoretical value
		We express all the general dew formation performance based on theoretical value(*2).
		丂
	*1	Flared Piping Set(PH/SPH/WH), Heat Insulated Pipe Cover (PME). Please refer to technical data/documents for Spiral Foam (PMH) since it is according to JIS A 9511 PE-C-P1
	*2	Based on Dew Formation Preventive Design Calculation. (more than 1 was added as safety factor)

DEW FORMATION TABLE OF COPPER PIPE

Value shows relative humidity outside pipe(%)

Copper Pipe Size (mm)	Thickness of Insulation	External Pipe Temperature (癈)	5	10	20	30	5	10	20	30	10	20	30
Copper Pipe Size (mm)	Thickness of Insulation	Internal Pipe Temperature(癈)	-5	-5	-5	-5	0	0	0	0	5	5	5
6.35	8mm		84.2	77.8	67.9	60.0	91.9	84.4	73.4	64.4	92.2	79.2	69.9
6.35	20mm		93.9	91.0	86.6	83.0	96.6	94.1	89.4	85.5	96.7	91.7	87.5
9.52	8mm		82.7	76.2	65.3	57.9	91.3	82.7	71.5	62.3	91.6	77.8	67.4
9.52	20mm		92.6	90.4	85.5	81.6	96.6	93.5	88.2	84.0	96.7	91.1	86.5
12.70	10mm		85.0	79.4	69.7	62.3	92.6	85.6	74.8	67.0	92.9	80.8	71.6
12.70	20mm		92.6	89.8	84.5	80.1	96.6	92.9	87.2	82.5	96.7	90.5	85.5
15.88	10mm		84.4	78.3	68.3	61.1	91.9	85.0	73.9	65.8	92.2	79.7	70.3
15.88	20mm		91.9	89.2	83.4	79.2	95.9	92.2	86.6	82.1	96.0	90.0	84.5
19.05	10mm		83.9	77.8	67.5	60.0	91.9	84.4	72.9	64.6	92.2	79.2	69.9
19.05	20mm		91.9	88.0	82.9	78.3	95.9	92.2	86.1	81.1	96.0	89.4	84.0
22.22	10mm		83.9	77.2	67.0	59.3	91.3	84.4	72.9	63.8	91.6	78.8	69.1
22.22	20mm		91.9	88.0	81.8	77.3	95.9	92.2	85.5	80.6	96.0	89.0	83.5
25.40	10mm		83.3	76.7	66.6	58.6	91.3	83.9	72.4	63.4	91.6	78.3	68.6
25.40	20mm		91.3	88.0	81.8	76.9	95.3	91.6	85.0	79.7	96.0	88.8	83.0
28.58	10mm		83.3	76.7	66.2	57.9	91.3	83.9	72.0	62.7	91.6	78.3	68.2
28.58	20mm		91.3	87.4	81.3	76.4	95.2	91.6	84.5	79.2	95.4	88.3	82.5
31.75	10mm		82.7	76.2	65.8	57.5	91.3	83.3	71.5	62.3	91.6	77.8	67.8
31.75	20mm		90.6	87.4	80.8	76.0	95.2	91.0	84.5	79.2	95.4	88.3	82.1
34.92	10mm		82.7	76.2	65.3	57.1	91.3	83.3	71.1	62.3	91.6	77.8	67.4
34.92	20mm		90.6	86.8	80.8	75.5	95.2	91.0	83.9	78.7	95.4	88.3	82.1
38.10	10mm		82.7	75.6	64.9	56.8	90.6	83.3	71.1	61.9	91.0	77.8	67.0
38.10	20mm		90.6	86.8	80.3	75.1	95.2	91.0	83.9	78.3	95.4	87.7	81.6

HOW TO UTILISE THIS TABLE

Copper Pipe Diameter 12.7mm, Insulation Thickness 10mm, Internal Pipe Temperature 0 C, External Pipe Temperature 20 C : Dew formation will occur at humidity more than 74.8%