Is used: Oil and gas industry

Heat shrink cuffs

Heat shrink cuffs are designed to provide corrosion protection to welding joints of steel pipes (two- and three-layer coating) in pipelines and their branches. There are no limitations with regard to pipe diameter, provided that operating temperature is below +60 .

Such a cuff is a cut of two-layered heat shrinking tape made of a thermal-light-stabilized base layer, sewn and oriented polyethylene, and a hot-melt adhesive layer.
The cuffs are supplied in a package that includes: a tape, lock tape and two-component epoxy primer.

RatioStandard
Therma STMP Cuff                              ThermoRadMST Cuff
Appearance The tape should not have blemishes (ruffles, bubles, clefts, breaks, punctures, non-uniformity of the adhesive coat). The tape should not have blemishes (ruffles, bubles, clefts, breaks, punctures, non-uniformity of the adhesive coat).
Adhesion of the tape to the primed steel and polyethylene covering at a temperature of (20±5) C, minimum, N/cm wide 35 (50)* 70
Relative elongation at rupture of the base tape lengthwise, % minimum 200 200

Shrinkage allowance lengthwise, % maximum (minimum)

15 (30) 20 (30)

Adhesion of the tape to the primed steel after 100 h of exposure to water, N/cm wide, minimum, at a temperature of (20, 40, 60)º C. for pipes of the following diameter: up to 820 mm inclusive (over 820 mm)

3,0 (3,5) -

Adhesion of the tape to the primed steel after 100 h of exposure to water, at a temperature of 60º C, N/cm wide, minimum:

- 50

Transition resistance of the coating in a 3% solution of NaCl at a temperature of (20±5)ºC, Om x m2, minimum: initial (after 100 days of testing)

 

1010  (109) 1010 (108)

Coating impact resistance, J, minimum, at a testing temperature in between minus (40±3)ºC to plus (40±3) for pipelines of the following diameter:

up to 273 mm inclusive

  up to 530 mm inclusive

  up to 820 mm inclusive

  > 820 mm

 

6

8

10

Coating impact resistance, J, minimum, at a temperature of:

    - (30±3)ºC minimum

     - (20±3)ºC minimum

     - (50±3)ºC minimum

 

8

4

 

 

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