Field-Joint Coating Materials
Heat Shrink Sleeves (HSS) PP, PE, Hybrid
The shrinkable material (polyethylene) fills any imperfections in the steel. A strong bond (aggressive mastic sealant) prevents air or water from reaching bare steel. It protects during backfill, stays in place through contraction and expansion of the pipeline, and prevents other outside forces from exposing the previously bare metal of the field joint to air or water.
HSS Layering
2-Layer HSS
Our 2-layered heat-shrinkable sleeves consist of an adhesive copolymer layer and a film backing that is radiation cross—linked high-density polyethylene or polypropylene.
Our 2-layer PE or PP HSS set-up enables excellent resistance to cathodic disbondment and moister, corrosion protection, and anti-shearing caused by brutal forces.
3-Layer HSS
Our 3-layered heat-shrinkable sleeves start with a LE, solvent-free 2-component layer, then a copolymer adhesive, and lastly, a cross-linked, high-density polyethylene or polypropylene backing.
3LPE/3LPP HSS systems are great for high-temperature environments, providing superior abrasion, mechanical, and chemical protection. Additionally, the high-quality adhesive provides strong resistance to cathodic disbondment.
Hybrid HSS
Another HSS option: Hybrid HSS. This system utilizes polypropylene-based materials for the backing layer with a mastic adhesive.
The Hybrid HSS enables excellent mechanical protection with the same ease of installation as traditional HSS. It also allows lower preheat temperature and fast application.
The Hybrid HSS is ideal for offshore pipeline installation projects where mechanical protection is required for the pipe to move across the rollers during installation.
HSS Equipment
RAE’s Heat Shrink Sleeve (HSS) Coating service offers an easy, cost-effective solution to provide protection from corrosion, mechanical damage, and works well in high heat environments. The shrinkable materials (PP, PE, or Hybrid in combination with LE primer) provides a strong bond, and provides protection during pipeline installation activities.
