Heating system
RU EN
Log in
/ Energy industry

Energy industry


Modern energy-efficient solutions require modern materials. RU-FLEX synthetic rubber-based foam insulation meets the high requirements of the energy industry. The insulation is durable and reliable, exceeding the service life of alternative materials, and has proven itself in the best possible way.

Properly selected insulation can reduce heating losses significantly. Ease of installation, ease of operation and inspection, durability and reliability of foam rubber insulation have won the trust of designers and builders creating both fuel and energy facilities and associated buildings and structures.

To help choose the right 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 = 95/70 ˚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 ST, mm Recommended insulation thickness, RU-FLEX ST, mm
89 > 5000 hours
(209 days or more) 		40,55/32,92 Т40/Т32
≤ 5000 hours
(208 days or less) 		33,22/27,94 Т32/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 ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ST PROM ALU, mm
89 > 5000 hours
(209 days or more) 		38,63/31,05 Т40/Т32
≤ 5000 hours
(208 days or less) 		31,29/26,06 Т32/Т25

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 = 95/70 ˚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 ST, mm Recommended insulation thickness, RU-FLEX ST, mm
89 40 11,47/6,36 Т13/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 ST PROM ALU, mm Recommended insulation thickness, RU-FLEX ST PROM ALU, mm
89 40 16,51/9,28 Т19/ Т13

Calculations made according to SP 61.13.330.2012 RF

Residential Real Estate Commercial Real Estate Healthcare Food Industry Transport Industry Energy Industry