Butyl Rubber Tape

«POLYZOM» ANTI-CORROSION POLYETHYLENE BASED SYSTEM

«POLYZOM» ANTI-CORROSION POLYETHYLENE BASED SYSTEM

It is designed for protection of the outer surface of steel main pipelines of a diameter up to 720 mm against underground and atmospheric corrosion.

The «POLYZOM» anti-corrosion system comprises:

  • «POLYZOM-S» tape (cold applied tape) which is a multilayer self-adhesive roll material manufactured by coextrusion and calendering of heat and light stabilized HDPE and LDPE with one side modified butyl rubber based adhesive coating;
  • «POLYZOM-O» wrapper (cold applied tape) which is a multilayer self-adhesive roll material produced by coextrusion and calendering of heat and light stabilized HDPE and LDPE with one side modified butyl rubber based adhesive coating;
  • «POLYZOM-GRUNT» butyl rubber primer.

PHYSICAL AND MECHANICAL PARAMETERS

Descriptions Measurement conditions Values
   «POLYZOM-S» Tape «POLYZOM-O» Tape
Thickness, mm  +20 °C 0,65 ± 0,05
 0,65 ± 0,05
Tape width, mm  +20 °C 150 ± 5
225 ± 5
450 ± 5
150 ± 5
225 ± 5
450 ± 5
Length, m, max +20 °C 85 85
Min. tensile strength at break, N/cm +20 °C 50 80
Min. adhesion of tape to a primed steel surface:
— at +20 °C, N/mm
— at Тmax, N/mm
+20 °C
Тmax
2,5
1,5

Min tape to tape adhesion with overlap:
— at +20 °C, N/mm
— at Тmax, N/mm
+20 °C
Тmax

0,7
0,4

APPLICATION

The «POLYZOM» 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 -25 °С to +45 °С.

In terms of its physical, mechanical and protective properties, the “POLYZOM” anticorrosive polyethylene system corresponds to class B products, i.e. reinforced coating according to standard DSTU 4219-2003.

In terms of thermal stability — the maximum permissible service temperature, the «POLYZOM» system corresponds to class 40 products, i.e. it is stable at pipeline temperature up to +40 °C according to standard DSTU 4219-2003.

In terms of resistance to special operating conditions, the «POLYZOM» tape corresponds to the UV class materials which are suitable for use under an extended exposure to ultraviolet radiation.

The «POLYZOM» anti-corrosive polyethylene tape system is used as a component of protective coating No. 7 according to standard DSTU 4219-2003.

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