Butyl Rubber Tape
NK-50 PRIMER AS PER TU 5775-001-01297858-95
PVC TAPE «PVC-O» FOR INSULATING GAS- AND OIL PIPELINES
It is intended for application to metal pipelines under polymer insulating tape for protection of metal surfaces against corrosion.
The primer is a compounded rubber-resin mix dissolved in gasoline.
PHYSICAL AND MECHANICAL PARAMETERS
Descriptions | Measurement conditions | Values |
Color | +20 °C | black |
Viscosity according to ВЗ-4, s | +20 °C | 25 ± 5 |
Min. adhesion to steel surface, N/cm | +20 °C | 20,0 |
Min. adhesion to steel surface after aging in air for 1000 h at 100 °C, N/cm | +100 °C | 15,0 |
Min. adhesion to steel surface after aging in water for 1000 h at 60 °C, N/cm | +60 °C | 15,0 |
Min. solid residue, % | +20 °C | 22 |
Max. peeling area at cathodic polarization, см2 | +20 °C+60 °C | 515 |
APPLICATION
«NK-50» primer is used in conjunction with «POLYLENE» tape «40-LI-63», «40-LI-45», «PVC-OL» grades.
Thermal resistance — the maximum permissible service temperature for «NK-50» primer is +50 °C.
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