Long Term Corrosion Protection
Yellow Jacket® XL consists of a seamless continuous sheath of high density polyethylene extruded over a newly developed tougher hybrid adhesive material. It combines the high peel strength and indentation resistant characteristics of a copolymer adhesive normally used in a 3-Layer HDPE coating system with the excellent adhesion-to-steel and cathodic disbondment properties of a mastic adhesive used in the standard Yellow Jacket® coating system.

The high density polyethylene topcoat is applied using crosshead application technology, therefore creating a seamless coating that is lamination free.

Mechanical Protection
The new tougher Yellow Jacket® XL adhesive combined with its robust high density polyethylene topcoat protects pipelines during transportation and installation, therefore reducing costly repairs while also providing added in-ground protection against shear forces, chemicals and abrasive soil conditions. The Yellow Jacket® XL system provides a high level of mechanical protection across many diverse environments without requiring the use of introduced select backfill.

Yellow Jacket® XL far exceeds the stockpiling requirements of AS1518-2002 and is extremely resistant to handlingand stockpiling damage from extreme environment conditions, including high ambient temperatures.

Operational Parameters
The high lap shear and peel strength properties of the new adhesive allows Yellow Jacket® XL to be used for all soil conditions up to 70°C pipeline operating temperatures and is compatible with all field joint coating systems currently deployed in the Australian onshore oil & gas market.

The tougher nature of the new Yellow Jacket® XL adhesive has retained the excellent bendability of the standard Yellow Jacket® product. The adhesive passes all plasticity and flexibility tests from AS1518-2002-Appendix B.

The lap shear and resistance to flow properties of the adhesive means that little or no shrink back of the high density polyethylene topcoat occurs.