DENSOPOL 80 HT (HIGH TEMPERATURE) TAPE

Description

DENSOPOL 80 HT TAPE – HEAVY DUTY PVC/BITUMEN FABRIC-REINFORCED TAPE

A synthetic fabric reinforcement coated with rubber bitumen adhesive compound and backed with a conformable PVC film. Due to its great flexibility Densopol 60 HT is used for wrapping small to medium diameter pipes, welded joints, bends and fittings whereas Densopol 80 HT is used on larger diameter pipes.

Densopol 80 & 80 HT are extremely tough cold-applied laminate tapes. The combination of PVC backing and fabric reinforced polymer bitumen adhesive makes it extremely resistant to damage by sharp objects e.g. poor backfill.

The extreme toughness is due to the combination of the heavy duty PVC backing and the fabric reinforcement in the bituminous adhesive compound.

 

Uses

Densopol 80HT is used for the protection of buried or sub-marine pipes, welded joints, bends and fittings. The combination of PVC backing and fabric reinforced polymer bitumen compound makes it extremely resistant to damage by sharp objects e.g. poor backfill. It is suitable for application by hand or machine on medium to large diameter pipes.

Service Temperature: -10°C to +60°C

Composition

Densopol 80HT is comprised of synthetic fibre fabric impregnated and coated with polymer modified bitumen compound laminated to thick PVC sheeting. The compound surface is protected by a plastic film interleaving which is discarded during application.

 

Characteristics

• Suitable for use on pipelines
• Resistant to cathodic disbondment
• Resistant to acid, alkali and salts.

 

Features

• Cold applied
• Good comformability
• Good impact resistance
• Excellent adhesion to pipe and self
• Excellent resistance to cathodic disbonding
• Compatible with common pipe coatings
• Suitable for application by hand or machine on medium or large diameter pipes

 

Application

Prepare steel to St2 (power brushed)/AS 1627 P.2 (minimum). Apply thin film of Denso Primer D to all surfaces to be protected and allow to tack dry. Peel back interleaving and apply adhesive side of the tape to the primed surface and press down. Apply the tape spirally with enough tension to make it conform. Remove interleaving as wrapping proceeds. Overlap each turn by 55% to achieve double thickness. Irregular surfaces such as valves, flanges, etc. may require the use of Denso Bitumen Mastic, Denso Mastic or Denso Profiling Mastic. Refer to the product sheets for specific product for information on application.

 

Testing

Ensure the application has:

• Sufficient tension
• No creases or folds
• Sufficient overlap.

 

Availability

Densopol 80HT is available in 10 m rolls from 50 mm to 300 mm widths.

 

Typical Properties