• 13.04.2022

Section: Details

Scope of application:

The heat-shrinkable cuff Abris S-T-DTt is designed to provide high-quality corrosion protection of the welded joints of steel oil and product pipelines and branches from them, as well as repair of damaged insulation of pipelines, gas pipelines, oil pipelines, water pipes in highway conditions.

The heat-shrinkable cuff is made on the basis of Abris S-T-DTt material, which is a self-adhesive mastic-polymer part reinforced with a heat-shrinkable tape.

The cuff set consists of:

• heat shrinkable cuff Abris S-T-DTt  TU 5772-003-43008408-99;
• lock plate Abris S-T-DT TU 5772-003-43008408-99;
• single-component primer R-NK TU 5775-004-52471462-2003.

The geometric dimensions of the heat shrinkable cuff depend on the outer diameter of the insulated pipe.

Geometric dimensions of the heat-shrinkable cuff:

Geometric dimensions of the lock plate:

In coordination with the designing organization, the dimensions of the cuff and lock plate (width, length and thickness) can be changed.

The heat-shrinkable cuff is available both as a set (ready-made segments for a certain pipe diameter) and in a roll for self-cutting of parts.

Technical specifications:

Note: The table shows the adhesion parameters of the cuff after heat shrinkage.

Application technology

It includes the following stages:

1. Preparation of the surface of the welded joint and adjacent sections at a distance of at least 200 mm (brush or abrasive cleaning of dust, dirt, rust, moisture removal, degreasing);
2. Processing of the adjacent factory coating at a distance of at least 100 mm with metal brushes to roughen the surface layer;
3. Applying the primer to the prepared surface, capturing the areas adjacent to it with the factory coating;
4. Application of the cuff with the required tension around the weld joint area;
5. Installing the lock plate so that the upper edge of the overlap passes under the middle of the lock plate;
6. Shrinkage of the cuff.

Advantages

• Manufacturability (the kit is completely ready for use, there is no stage of applying a mastic-polymer layer);
• Good adhesion to metal, concrete, plastic and various insulating coatings;
• Does not require preheating of the pipe or mastic layer;
• Resistance to aggressive environments;
• Maintainability;
• Possibility of application at negative temperatures up to -30 °C;
• Operating temperature from -60 °C to +80 °C;
• Preservation of sealing properties during vibration loads;
• No waste;
• Environmental safety;
• Reliability.