Specifications

External Coating for Girth Weld
1.Tensile strength:15.0Mpa
2. Good anticorrosion
3. For buried underground pipeline

External Coating for Buried Underground Pipeline

 

It is a kind of special-purpose pipe connection, which is made by embedding specific electric heating melt welding net in the basis of high quality PE sheet with special technicals.

 

 Features & Benefits:

• Waterproof; good sealing capacity;
• Able to withstand axial forces initiated by axial moments of the pipe in the ground;
• Able to withstand radial forces and bending forces; high tensil strength;
• Able to withstand effects of temperature and temperature variatations.
• Have the same thickness of the pipeline insulation layer.
• Could be used as drawing pipe  scope of application: DN200~DN3000mm

Testing program	Required technical	Testing result	Testing method
Appearance	The appearance of  HDPE electric fusion sleeve is smooth and flat, no bubble, no split, no discolor because of decomposition; and the embessed fusion net is no disconnect and tilting.	pass	Tested by eye under the sunlight.
Tensile strength	≥13Mpa	15.0Mpa	GB/T 8804.3-2003
Hydraulic pressure test	20°C,0.1Mpa water pressure, no damage and leakage after 1 hour	pass	GB/T 6111-2003
Air leakage test	20°C,0.1Mpa air pressure,no damage and leakage after 1 hour	Pass	GB/T 6111-2003