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Use of modern, high quality RU-FLEX thermal insulation avoids major problems: heat loss in hot water and heating systems, condensation and frost formation on cold water pipes and air-conditioning systems. Application on air ducts improves incoming air quality and reduces equipment noise.

Use of foam rubber products in healthcare facilities is approved by hygienic certification.

Water supply in healthcare facilities requires a particularly careful design approach so reliable, durable foam rubber insulation is widely used in this field. Modern RU-FLEX solutions are responsible for the uninterrupted supply of water to those in constant need of help and care.

To help choose the right RU-FLEX ECO PHARM and RU-FLEX ST insulation thickness, we have prepared ready-made solutions (basic calculations).

Problem and solution

Calculation of insulation thickness according to normative heat flux density

Initial data

  • Heat transfer medium: water
  • tm = 60 ˚С – coolant temperature in the pipe;
  • tо = 25 ˚С –temperature in the shopping center.

According to SP (Construction Regulations) 61.13330.2012 "Thermal insulation of equipment and pipelines" paragraph 6.12: it is allowed to accept the nearest lower thickness of the thermal insulation layer in cases of calculation of temperature on the insulation surface and heat flux density norms, if the difference between the calculated and nominal thickness does not exceed 3 mm.

Without covering layer or with covering layer in different colours (PROM FORM):
Steel pipe diameter, mm Operating mode (24-hour or heating period) Design thickness of insulation, RU-FLEX ECO PHARM / ST, mm Recommended insulation thickness, RU-FLEX ECO PHARM / ST, mm
57 > 5000 hours
(209 days or more) 		24.85 T25
≤ 5000 hours
(208 days or less) 		21,43 T19
76 > 5000 hours
(209 days or more) 		26,96 Т25
≤ 5000 hours
(208 days or less) 		23,47 Т25
With foil-coated cover layer (ALU, PROM FORM silver, PROM ALU):
Steel pipe diameter, mm Operating mode (24-hour or heating period) Calculated insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm
57 > 5000 hours
(209 days or more) 		22,95 Т25
≤ 5000 hours
(208 days or less) 		19,52 Т19
76 > 5000 hours
(209 days or more) 		25,09 Т25
≤ 5000 hours
(208 days or less) 		21,59 Т19

T-Designation of the tubular material.
Calculations made according to SP 61.13.330.2012 RF

Calculation of insulation thickness according to a given temperature on the insulation surface.

Initial data

  • Heat transfer medium: water
  • tm = 60 ˚С – coolant temperature in the pipe;
  • tо = 25 ˚С –temperature in the shopping center.

According to SP (Construction Regulations) 61.13330.2012, paragraph 6.7.1: for insulated surfaces located in working or service areas of rooms and containing substances with a temperature of 150 °C or lower, the surface temperature of the thermal insulation should not exceed 40 °C.

Without covering layer or with covering layer in different colours (PROM FORM):
Steel pipe diameter, mm Insulation surface temperature not exceeding ˚C Design thickness of insulation, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm
57 40 4,18 Т9
76 4,24 Т9
With foil-coated cover layer (ALU, PROM FORM silver, PROM ALU):
Steel pipe diameter, mm Insulation surface temperature not exceeding ˚C Calculated insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm
57 40 6,89 Т9
76 7,05 Т9

T-Designation of the tubular material.
Calculations made according to SP 61.13.330.2012 RF

Calculation of insulation thickness to prevent condensation from ambient air on the thermal insulation cover layer.

Initial data

  • Heat transfer medium: water
  • tm = +5 ˚С – coolant temperature in the pipe;
  • tо = +20 ˚С – temperature in the shopping center.
  • φ = 65 % — the relative humidity in the shopping centre.
Without covering layer or with covering layer in different colours (PROM FORM):
Steel pipe diameter, mm Design thickness of insulation, RU-FLEX ECO PHARM / ST, mm Recommended insulation thickness, RU-FLEX ECO PHARM / ST, mm
33,5 5,11 Т9
89 5,49
159 5,62 Р10/Т9
219 5,67
With foil-coated cover layer (ALU, PROM FORM silver, PROM ALU):
Steel pipe diameter, mm Calculated insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ECO PHARM PROM ALU / ST PROM ALU, mm
33,5 7,01 Т9
89 7,68
159 7,93 Р10 / Т9

Calculations made according to SP 61.13.330.2012 RF


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