42mm Pipe Insulation
42mm Pipe Insulation — UK Specialist Supplier
Shop our complete range of 42mm pipe insulation, available in elastomeric foam, phenolic foam and mineral wool. 42mm pipe insulation fits 42mm OD copper pipe — a standard commercial heating pipe size used in heating mains, plant room pipework, hot water primary circuits and light commercial HVAC systems.
Available Materials
- Armaflex EVO — Class O closed-cell elastomeric foam. Built-in vapour barrier, Microban antimicrobial protection. Available in 13mm, 19mm, 25mm and 32mm wall. Standard and self-seal versions
- Kingspan Kooltherm — Premium phenolic foam, λ = 0.021 W/mK. Meets BS 5422 at 25mm wall for 42mm OD pipework. Class O, foil faced
- Rockwool Rocklap — A1 non-combustible mineral wool for high-temperature and fire-rated applications. Available in 25mm, 30mm and 40mm wall
- Tubolit DG — Cost-effective polyethylene foam for standard domestic heating. Not suitable for Class O or condensation control applications
Wall Thickness Guide for 42mm Pipe Insulation
- 13mm wall — standard domestic heating
- 19mm wall — commercial HVAC and unheated spaces
- 25mm wall — BS 5422 commercial heating (Kooltherm) / condensation control
- 30mm wall — high temperature and industrial
- 40mm wall — steam and process pipework
BS 5422 for 42mm Pipe Insulation
For LTHW commercial heating on 42mm OD pipework, BS 5422 requires a minimum of 25mm Kooltherm or 32mm Armaflex EVO. Read our full guide: BS 5422 Pipe Insulation Standards Guide.
Shop by Pipe Size
35mm | 42mm | 54mm | 76mm | 89mm
Related Guides
- 42mm Pipe Insulation Guide
- Pipe Insulation Wall Thickness Guide
- BS 5422 Pipe Insulation Standards Guide
- Armaflex Installation Guide
Not sure which insulation is right for your project? Call our team on 0161 775 1190 (Mon–Fri 8am–4pm).