field joint coating system
The viscoelastic tape should base on non-crystalline low viscosity polyolefin tape with self healing along with polymeric tape outer wrap.
It should be easily applicable for wrapping of irregular shape fittings i.e.
Weld Joints, Bends and service Tees in underground Gas Distribution Piping System with minimum surface preparation.
Composition:
The tape roll must be formulated with a removable plastic film at the time of application.
The viscoelastic tape should be provided with suitable outer wrap for mechanical protection;
the purpose of which is to provide additional pressure to support cold flow of compound tape
and self healing properties of complete coating system.
Characteristics of the tape:
The application should be easier and fast, self vulcanizing and compatible with Asphalt,
Coaltar and PE coating on the Gas Pipeline structures.
The visco elastic tape shall conform to the attached specifications.
The visco elastic tape Should have good resistance to Acid, Alkali and Salts
The visco elastic tape should without primer.