Pipeline Protection

«JOINT WRAP NST» POLYETHYLENE TAPE

«JOINT WRAP NST» POLYETHYLENE TAPE

Designed for corrosion protection of outer surfaces of underground oil and gas pipelines, public utility pipelines, gas grids, water conduits.

The «JOINT WRAP NST» tape comes in two types:

1. The «JOINT WRAP NST-Н 1000» tape is a self-adhesive rolled multilayer material, produced by means of an extrusion/calendaring process from high-density polyethylene, with one side covered with a butyl rubber elastomer and hydrocarbon resin-based adhesive. The adhesive is protected by a release liner for preventing tape roll coils from premature adhesion.

2. The «JOINT WRAP NST-НВ 1000» tape is a self-adhesive rolled multilayer material, produced by means of an extrusion/calendaring process from high-density polyethylene, with one side covered with a bitumen-based adhesive. The adhesive is protected by a release liner for preventing tape roll coils from premature adhesion.

As per Standard IGS-M-TP-14(2), Section 5, the rolls are supplied in the following sizes (lenght x width):
— 9 m (30‘’) х 50 mm (2‘’)
— 20 m (30‘’) х 100 mm (2‘’)
— 30 m (30‘’) х 150 mm (2‘’)

PHYSICAL AND MECHANICAL PARAMETERS

Descriptions Measurement conditions Values Method
    JOINT WRAP NST-Н 1000 JOINT WRAP NST-НВ 1000  
Thickness, mm, no less than +23 °C 1,0 1,0 ASTM D 1000
Color black black visual
Breaking strength, kg/cm, no less than +23 °C 4 4,5 ASTM D 1000
Elongation at break, %, no less than +23 °C 250 250 ASTM D 1000
Cathodic disbondment, mm, max radius +23 °C 15 10 ASTN G 8
method А
Electrical resistance, Ohm х m2 +23 °C 108 108 EN 12068
annex J
Water absorption, % by weight, no less than +23 °C 0,1 0,1 ASTM D 570
Impact resistance, J, no less than +23 °C 15 15 EN 12068
Adhesion, kg/cm, no less than:
— to primed steel
— lap joint
+23 °C
+23 °C
3,0
1,5
3,0
2,5
ASTM D 1000

APPLICATION

The «JOINT WRAP NST» tapes are compatible with all standard anticorrosion coatings, including two- and three-layer and polyethylene factory coatings. Used for joint, flange, fitting, tap, and valve insulation.

Compliant with EN-DIN 12068 and AWWA C 209 International standards. The «JOINT WRAP NST» tapes are designed for mechanical (by coating machines and devices) and manual application to pipe surface at ambient temperatures of +5 to +50 °С (recommended by the manufacturer).

The «JOINT WRAP NST» tape’s operating temperature is –20 to +60 °С. Used in combination with NSP Р-27 and NSP Р27В primers.

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