What is the primary application of IS 14695 outerwrap?

It's used as a protective outerwrap for anti-corrosion treatment on buried or submerged steel pipelines.

What is the minimum required softening point for the outerwrap?

The minimum softening point is 105 °C, as per Table 1.

What is the minimum longitudinal breaking strength?

The minimum longitudinal breaking strength is 60 N per cm width, as specified in Table 1.

Does this wrap provide mechanical protection?

Yes, it provides both corrosion protection and a degree of mechanical protection against soil stress and backfill damage.

IS 14695

: 1999

Glass Fibre Base Coal Tar Pitch Outerwrap

CurrentSpecializedSpecificationMaterials Science · Waterproofing and Damp-Proofing

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This standard specifies the requirements for glass fibre-based coal tar pitch outerwrap, used for protecting buried or submerged steel pipelines from corrosion. It covers material composition, physical properties like strength and softening point, and methods for testing these properties. The outerwrap consists of a glass fibre mat impregnated and coated with coal tar pitch.

Glass Fibre Base Coal Tar Pitch Outerwrap

Quick Reference Values

Minimum Breaking Strength (Longitudinal)60 N/cm

Minimum Tear Strength40 N

Minimum Softening Point105 °C

Maximum Penetration at 25°C20 (in 0.1 mm units)

Minimum Mass of coal tar pitch per unit area0.7 kg/m²

Water Absorption (max)0.5 % by mass

Practical Notes

This material is a key component in multi-layer pipeline corrosion protection systems, typically applied over an inner wrap.

The softening point is a critical parameter to ensure stability during application and in high-temperature service environments.

Ensure proper surface preparation and primer application on the pipe before wrapping for effective adhesion and long-term performance.