Pipe Insulation by Pipe Size
Pipe Insulation by Pipe Size — UK Specialist Supplier
Browse our complete range of pipe insulation organised by pipe size. Whether you're insulating 15mm domestic copper pipework or 273mm industrial steel mains, we stock the right insulation from the UK's leading brands including Armaflex, Rockwool, Kingspan Kooltherm and K-Flex.
Shop by Pipe Size
- 15mm Pipe Insulation — The most common domestic size for central heating and hot & cold water pipework
- 22mm Pipe Insulation — Standard size for domestic heating mains and larger hot water circuits
- 28mm Pipe Insulation — Used in larger domestic and light commercial heating installations
- 35mm Pipe Insulation — Commercial heating and hot water primary circuits
- 42mm Pipe Insulation — Commercial heating mains, hot water primary circuits and plant rooms
- 54mm Pipe Insulation — Large bore commercial heating and hot water distribution pipework
- 76mm Pipe Insulation — District heating and large commercial heating mains
- 108mm Pipe Insulation — Large bore commercial hot water primary circuits and district heating
Not Sure Which Size You Need?
Pipe sizes refer to the outside diameter (OD) of the pipe, not the bore. Standard UK copper pipe sizes are 15mm, 22mm, 28mm, 35mm, 42mm, 54mm, 67mm, 76mm and 108mm. Steel pipe is measured by nominal bore (NB) which differs from the OD — contact our technical team on 0161 775 1190 for guidance.
Available Insulation Types
- Flexible foam (Armaflex EVO, K-Flex) — Class O, suitable for hot and cold pipework, condensation control
- Mineral wool (Rockwool Rocklap) — High temperature applications, fire-rated installations
- Phenolic foam (Kingspan Kooltherm) — Highest thermal performance, thin wall thickness
- Self-seal foam — Pre-slit with adhesive closure for fast installation
