Heat-loss and insulation calculators.

A bare DN50 (2″) steam line at 150 °C in 20 °C still air loses roughly 250 W per metre. For the default 1 m DN50 example that is about 246 W bare. The selected source-backed 50 mm pipe section reduces the calculated loss to about 35 W, with exact values changing with the product table and temperatures.

There is no single thickness for every DN50 steam line. Select the product, process and ambient temperatures, then compare the calculated heat loss and outer-surface temperature at the available standard thicknesses.

Payback equals entered insulation cost divided by calculated annual money saving. Annual saving uses the calculated heat reduction, operating hours, system efficiency and energy price entered in the calculator.

It uses a simplified steady-state method based on ASTM C680 / ISO 12241 for cylindrical, flat and spherical geometries, with a combined outer surface coefficient. Results are indicative screening estimates; verify critical design and reporting values with a qualified survey and project-specific inputs.

The calculator uses 60 °C as a screening threshold. Under ASTM C1055 and EN ISO 13732-1, an acceptable contact temperature depends on contact time, surface system and injury criterion. Inzonex projects normally target ≤45 °C where ambient conditions and the equipment duty allow, with the final design verified for the application.

The calculator multiplies annual input-energy saving by the emissions factor you enter. The result therefore depends on line dimensions, temperatures, operating hours, efficiency and the selected energy source.

Yes. It calculates the insulated outer surface temperature. The 60 °C value is a screening threshold only; acceptable contact temperature depends on contact time and surface conditions. Inzonex projects normally target ≤45 °C where ambient conditions and duty allow, with the final personnel-protection design verified for the application.

Keep the calculated outer surface above the ambient-air dew point. Enter air temperature, relative humidity, pipe temperature, diameter, insulation conductivity and thickness; use a suitable vapour-control system in the final design.

The Freeze protection tab estimates how long stagnant water takes to cool to 0 °C in sub-zero ambient air. It does not calculate the time to freeze solid. The result depends on pipe dimensions, insulation, starting water temperature and ambient temperature; insulation delays cooling but does not supply heat.

Choose DN/NPS and quantity. Valve area follows the ISO 12241 manual flanged blocking-valve equation for DN15–DN200; use project dimensions for an exact product.

Enter the exposed surface area, process and ambient temperatures, insulation conductivity and thickness. The quick model applies the selected flat or vessel geometry and reports bare and insulated heat loss for those inputs.

Results read in W and W/m, total kW, and annual kWh / MWh, plus money saved and CO₂ avoided. For US units, 1 W/m ≈ 1.04 BTU/hr·ft and 1 kW ≈ 3,412 BTU/hr. Energy is shown in your own currency (€, $, £) at the price you enter.

NPS (½″–16″) and DN (DN15–DN400) are just two labels for the same outer pipe diameter — DN50 is 2″, DN100 is 4″. Pick whichever your spec uses; the heat-loss result is identical. Switch the sizing standard at the top of the calculator.

Yes — add multiple items across pipes, flat surfaces, heat exchangers and vessels into one project for a whole-site total of energy, cost and CO₂. For a full equipment list and an exact quote, send your data to Inzonex for a heat-loss report.

Yes, as preliminary evidence. Measured and verified insulation savings can support applicable ESOS action plans, SECR energy-efficiency reporting, CSRD/ESRS E1 disclosures and ISO 50001 energy-performance work when the values fall within the reporting boundary. This calculator provides an estimate, not compliance, certification or automatic reporting eligibility. Request a heat-loss report →

Yes. A bare 150 °C surface is a burn hazard. The calculator uses 60 °C only as a screening threshold; acceptable contact temperature depends on contact time and surface conditions. Inzonex projects normally target ≤45 °C where ambient conditions and duty allow. Final personnel-protection design must be verified for the application.