219mm Pipe Insulation

219mm pipe insulation fits steel pipe with a 219mm outside diameter — equivalent to 8 inch nominal bore steel pipe (219.1mm OD), used for the largest commercial and industrial heating mains, district heating primary mains, major chilled water distribution and industrial process pipework. We stock a full range of 219mm pipe insulation from the UK's leading manufacturers including Armaflex, K-Flex, Rockwool and Kingspan Kooltherm, in wall thicknesses from 25mm to 60mm.

Types of 219mm Pipe Insulation

Armaflex EVO 219mm — Class O closed-cell nitrile rubber foam with built-in vapour barrier. Available in 25mm wall. The professional's choice for chilled water and HVAC at this pipe size
K-Flex ST 219mm — Class O elastomeric foam equivalent to Armaflex. Available in 25mm wall
Rockwool Rocklap 219mm — A1 non-combustible mineral wool with foil facing for high-temperature applications up to 250°C. Available in 25mm, 40mm, 50mm and 60mm wall. The primary specification for steam mains, district heating and high-temperature industrial pipework at this size
Kingspan Kooltherm 219mm — Premium phenolic foam (λ = 0.025 W/mK) for district heating and heat network applications where thin-wall, high-performance insulation is required

Which Wall Thickness Do I Need?

25mm wall — Standard for commercial HVAC, chilled water and heating mains. Meets Part L and CIBSE Guide C for most commercial applications at this pipe size
30–40mm wall — Enhanced performance for district heating primary mains, exposed pipework and high-performance specifications (Kooltherm)
50–60mm wall — High-temperature heating mains, steam distribution and major industrial process pipework (Rockwool)

219mm Pipe Insulation — Common Applications

District heating and heat network primary flow and return mains
Major commercial and industrial heating mains (8 inch steel pipework)
Large chilled water mains in data centres, hospitals and industrial HVAC
Steam distribution mains and high-temperature process pipework
Power station, energy centre and utility infrastructure pipework

How to Measure Pipe Insulation

Pipe insulation is sized by the outside diameter (OD) of the pipe. For steel pipe, 219mm refers to 219.1mm OD (8 inch nominal bore). Always measure the outside of the pipe before ordering — steel pipe OD differs from nominal bore size.