Tape Primer
The primer consists of a mixture of butyl rubber and synthetic compound and a Solvent-gasoline. The primer is applied to the appropriately prepared pipe surface before application of inner layer tape. The function of primer is to provide a bonding medium between the pipe surface and the inner layer tape.
Primer must be fully compatible with 3-ply tape below.
1.1 Hand-applied primer:
pipe surface application temperature: - 10°C up to + 65°C
pipe operating temperature: - 60°C up to + 75°C
flashpoint: app. -14°C
consumption: app. 0,2 litre/m2
1.2 Machine applied primer: (also for hand-application)
pipe surface application temperature: - 40°C up to +75°C
flashpoint: app. +21°C
consumption:
machine application approx. 0,1 litre/m2
hand application approx. 0,2 litre/m2
properties:
Flashpoint (EN 57) + 21°C
content of aromatic compounds 0,01%
(including Toluene, by GC analysis)
content of solids (ISO 1515) 24%
viscosity (DIN 53211, nozzle 4 mm, 23°C) 20 sec.
Saponification value (DIN 30672) 25 mg KOH / g
temperature range:
pipe surface application temperature: - 40°C to + 70°C
pipe operating temperature: - 60°C to + 70°C
consumption:
machine application app. 0,1 litre/m2 pipe surface
manual application app. 0,2 litre/m2 pipe surface
