Bituminous-Butyl Rubber Tapes

«BIZOM-BK» BITUMEN-BUTYL RUBBER CORROSION PROTECTION STRUCTURE

«BIZOM-BK» BITUMEN-BUTYL RUBBER CORROSION PROTECTION STRUCTURE

The product is designed for underground corrosion protection and atmospheric corrosion protection of the outer surface of the steel oil and gas trunk pipelines, product pipelines with a diameter of up to 1220 mm inclusive in their construction and repair.

The following grades of «BIZOM-BK» bitumen-butyl rubber corrosion protection structure are available: «BIZOM-BK» and «BIZOM-BK-UV» and consist of «BIZOM-BK» tape or «BIZOM-BK-UV» tape and «OZOM-BK» primer.

«BIZOM-BK» tape is a self-adhesive roll material consisting of a polyethylene tape base and adhesive layer of bitumen-butyl rubber mastic protected by a release film preventing the tape turns in the roll from sticking.

«BIZOM-BK-UV» tape is a self-adhesive roll material consisting of a polyethylene tape base with added UV stabilizers, adhesive layer of bitumen-butyl rubber mastic protected by a release film preventing the tape turns in the roll from sticking.

«OZOM-BK» primer is a black homogeneous liquid composition of butyl rubber, bitumen, corrosion inhibitors, phenol-formaldehyde resins and solvents.

PHYSICAL AND MECHANICAL PARAMETERS

Descriptions Measurement conditions Values
Tape thickness, mm  +20 °C 1,6
Tape width, mm  +20 °C 450 ± 2
225 ± 2
150 ± 2
Backing tape thickness, mm, at least  +20 °C 0,6
Mastic layer thickness, mm, at least   +20 °C 1,0
Adhesion of tape to the primed steel surface, kg/cm, at least +20 °C 3,5
Tape to tape adhesion in overlaps [N/mm], not less than +20 °C 1,5

By agreement with the customer rolled tape of other dimensions and tolerances can be manufactured.

APPLICATION

«BIZOM-BK» structure is intended for mechanical (by coating-and-wrapping machines, devices) and manual application onto the surface of the pipeline, at an ambient temperature of -25 °С to +40 °С.

According to its physical & mechanical and protective properties «BIZOM-BK» structure corresponds to «В» сlass — a very enhanced coating according to the National standard of Ukraine State Standard 4219-2003.

According to its thermal stability, depending on the maximum operating temperature, «BIZOM-BK» tape corresponds to the class «50», according to the National standard of Ukraine State Standard 4219-2003, whereas the pipeline protective system is stable at pipeline temperature up to +50 °C.

In terms of resistance under the special operating conditions, the «BIZOM-BK-UV» grade corresponds to the «UV» class of the coating as suitable for use over an extended action of ultraviolet radiation.

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