Butyl Rubber Tape

«POLYLEN» SYSTEM

«POLYLEN» SYSTEM

It is intended for insulation of the outer surface of underground oil and gas pipelines, ammonia lines, product pipelines in corrosion protection thereof during construction and repair, as well as for heat supply main pipes waterproofing.

The «POLYLEN» system comprises a polyethylene tape «POLYLEN» (TU 2245-003-01297859-99), a polyethylene wrapper «POLYLEN-OB» (TU 2245-004-01297858-99), primer «NK-50» (TU 5775-001-01297858-95).

«POLYLEN» polyethylene tape is a multilayer roll material made by coextrusion and calendering from thermo-light stabilized polyethylene of high and low density, coupled with a butyl rubber based adhesive layer. The color of the «POLINEN» tape roll core is black. Two grades of the «POLYLEN” tape are available: «40-LI-63» and «40-LI-45».

«POLYLENE-OB» wrapper is a plied-up roll material manufactured by coextrusion and calendering of heat and light stabilized HDPE and LDPE with one side modified butyl rubber based adhesive coating.

The color of the «POLYLEN-OB» wrapper roll core is white, however, the use of light-colored cardboard cores is allowed.

The «40-OB-63» grade of «POLYLEN-OB» wrapper is available.

«NK-50» Primer, a compounded rubber-resin mix dissolved in gasoline, is intended for application to metal pipelines under polymer insulating tape to protect the metal surface of pipelines from corrosion.

PHYSICAL AND MECHANICAL PARAMETERS

Descriptions Measurement conditions Values
   Grade «40-ЛИ-63» Grade «40-ЛИ-45» Grade «40-ОБ-63»
Thickness, mm  +20 °C 0,63 ± 0,05
 0,45 ± 0,05 0,63 ± 0,05
Tape width, mm  +20 °C 225 ± 5
450 ± 5
225 ± 5
450 ± 5
225 ± 5
450 ± 5
Min. tape length in a roll, m +20 °C 170 125 170
Min. tensile strength at break, N/cm +20 °C 50 50 80
Min. adhesion of tape to a primed steel surface, N/cm:
— at +20 °С
— after water soak test for 1000 hours, at +20 °С
— after water soak test for 1000 hours, at +40 °С
+20 °C
+20 °C
+40 °C
20
15
15
20
15
15



Min. tape to tape adhesion with overlap, N/cm +20 °C 0,7 0,7
Min. adhesion of tape to a primed steel
surface after exposure to air for 1000 h
at 100 °С, N/cm
+100 °C 20 20
Min. wrapper adhesion to polyethylene surface of the tape or wrapper, N/cm +20 °C 5,0
Min. funginertness, points +20 °C 2

APPLICATION

The «POLYLENE» system is intended for mechanized (using coating-and-wrapping machines and devices) and manual application to the surface of pipeline at ambient temperatures ranging from -40 °С to +60 °С.

Thermal resistance — the maximum permissible service temperature of the «POLYLENE» system is +40 °C.

To be applied in conjunction with the «NK-50» primer (TU 5775-001-01297858-95).

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