This Pipe Insulation Tester is an NPL designed and built national standard for thermal transference (or thermal conductivity) of pipe insulation and refractories at high temperatures.

Specification

• Mean specimen temperature range: 50 °C to 250 °C
• Conforms to BS EN ISO 8497:1997

Accreditation

• UKAS accredited test service (UKAS 0002)
• Accredited under 89/106/EEC: Construction Products, Notification id: 1146

Specimen dimensions

• Length: 3 m
  (A single piece specimen or multiple shorter pieces of 0.5 m to 1.2 m each)
• Wall thickness: 20 mm to 60 mm
• Inner diameter: 48 mm or 89 mm
  (Compressible specimens: ±2 mm or incompressible specimens: +2 mm and -0 mm)

Note

Although 'thermal conductivity' is a property of a homogeneous material, it is generally accepted that the term can still be used for insulation/construction products that contain a continuous mixture of two or more materials (e.g. air and glass fibre or air and concrete) providing the size of any particles is less than a tenth of the specimen thickness. However, if your samples have either discrete layers or large particles, then 'thermal resistance' would be quoted on the Test Report, rather than 'thermal conductivity'. However, the thickness of the product during the test would be quoted in the Test Report, allowing an 'effective' thermal conductivity to be calculated by dividing the thickness (in metres) by the thermal resistance.

Contact

Customer Services tel: +44 20 8943 6245
E-mail: thermal_enquiries@npl.co.uk