Pipe Thermal Insulation Thickness

For below ambient service by contrast the new pipe insulation thicknesses are not particularly noteworthy.

Pipe thermal insulation thickness. Extra margin must be taken on insulation thickness as sometimes conducting heat transfer through insulation may become higher than convective heat transfer due to air on outside wall of insulation. Inches recommended minimum thickness of insulation inches. Thickness 305 7 203 2 102 5 mm some margin should be taken on the insulation thickness because if the conductive heat transfer rate happens to be higher than the convective heat transfer rate outside the insulation wall the outer insulation wall temperature will shoot up to higher values than 50 0 c. Pipe insulation plays an important role in the design and construction of buildings where pipe temperatures can range from 0 f to 1000 f 18 c to 538 c in copper iron pvc cpvc and stainless steel piping.

Temperature range oc 50 90. Is sufficient thickness for all sizes on chilled water lines with an assumed operating temperature in the 40 f to 60 f range. Thicknesses of thermal pipe insulation used for saving energy vary but as a general rule pipes operating at more extreme temperatures exhibit a greater heat flow and larger thicknesses are applied due to the greater potential savings. For domestic hot water systems use 1 thick fiberglass pipe insulation on pipes up to 2 ips.

Personnel protection burn protection. The location of pipework also influences the selection of insulation thickness. Very hot systems like hot water and steam systems should also be insulated to avoid potential personal injuries. It is typically used in process piping and chiller plants and performs best in applications below 50 f.

Minimum thicknesses to meet ashrae 90. Insulation thickness 77 7 mm. This very rigid insulation offers the lowest heat flow rate of our pipe insulation and restricts absorption of water air and gas. The table below indicates recommended insulation thickness.

For example 1 in. In that case temperature of outer surface of insulation may increase to more than 50 c.