The tape is polyvinylchloride, PVC sticky, DRANK

Polyvinylchloride tapes paste on the surface of pipes cleared and covered with a primer. Normal isolation is carried out by winding of one layer of a tape, strengthened - two.

Polyvinylchloride tapes produce on the basis of svetotermostoyky insulating plastic of brand I of different color with drawing on one party of sticky glue.

Polyethylene and polyvinylchloride tapes reel up without special difficulties at a temperature of air from 288 to 298 To. At a temperature below zero efforts of a separation of a tape from a roll increase approximately twice that demands increase in expenses of power of the car.

Winding of a polyvinylchloride tape on the oil pipeline has to be made right after putting hot mastic. Expression and thinning of a bituminous layer at the strengthened tightness of a tape is not allowed.

APPOINTMENT

It is intended for protection against corrosion of an external surface of the main oil and gas pipelines as isolating and a sheeting. It is used at installation and repair of pipelines, and also a waterproofing of heat conductors.

DESCRIPTION
The tape should not have defects in the form of through openings, inclusions, gaps, admissions of a glue layer on all the area and anguishes on edges. A roll of a tape of a cylindrical form, without corrugation and wrinkles. The glue layer at rewind of a roll does not exfoliate and does not come over to other side of a tape. Color - black, blue.

PRODUCTION METHOD
The tape is made in the valtsevokalandrovy way on the basis of the plasticized polyvinylchloride with addition sacred and thermostabilizers with drawing on one party of a glue layer.

Indicator Norma

Durability at a gap, N/cm, not less than 50

Relative lengthening at a gap, %, not less than 80

Change of relative lengthening at a rupture of a tape, after endurance
at a temperature of 100 ° C within 1000 hours, %, no more than 10

Adhesion of a tape to steel, N/cm of width, not less than 5,0

Stickiness, sec., not less than 25

• Temperature of fragility, ° C, is not higher minus 30

Transitional resistance of a covering in 3% NaCl solution at 5106
to temperature of 20 ° C in 100 days of endurance 5105

Gribostoykost, point, no more than 2

Water absorption of a tape within 1000 hours at a temperature of 20 ° C, %, no more than 0,5

The area of flaking of a covering at cathodic polarization at
to temperature of 20 ° C, no more than 10

Thickness of a film, mm 0,2±0,05;

0,4±0,05;

0,6±0,05

Film width in a roll, mm 450±2

Cloth length in a roll, m, not less than 100

Weight of a roll, kg 25-30

PACKING
The tape is delivered in rolls on cardboard or polyethylene spools. Each roll is packed into a polypropylene bag.