A BRUGG GROUP COMPANY
The PREMANT sleeve systems are independently tested in accordance with EN 489. Successfully completed system and type tests confirm the watertightness and mechanical and thermal performance of the sleeve joints under realistic load conditions.
The tests include, among other things, verification of:
Two proven sealing systems are available for PREMANT sleeves.
Both meet the requirements of EN 489 and ensure permanently secure sealing of the pipe joints. Depending on the project requirements, a choice can be made between the proven double-seal system and the innovative INDUCON induction welding system.
A) The Double-Seal System
The double-seal system uses two independent sealing stages.
The inner seal is formed by a permanently elastic sealing tape made of butyl rubber. Heat-shrink sleeves are used for the outer seal, providing a permanent connection between the sleeve and the PE casing pipe.
The combination of both sealing stages creates a permanently watertight and mechanically robust joint between the sleeve and the PE casing pipe.
Advantages:
Image caption:
A = Sleeve body, B = Permanently elastic sealing tape, C = Weld-in plug, D = Alarm component, E = Heat-shrink band
B) The INDUCON Induction Welding System
In the INDUCON induction welding system, a metallic welding band is inserted between the sleeve and the PE casing pipe instead of the sealing tape. This welding band is heated contactlessly by induction. The sleeve and PE casing pipe are thus melted with pinpoint accuracy and joined by a material-to-material bond. The automated welding process creates a homogeneous, continuous 360° welded joint between the sleeve and the PE casing pipe. The result is a permanently watertight, high-strength and durable joint with reproducible joint quality.
This induction welding system is particularly suitable for demanding applications, such as undercrossings, high thermal loads or areas with groundwater.
The INDUCON induction welding system can only be used with tested PREMANT sleeve types and in combination with the PREMANT pipe system featuring a P235GH steel medium pipe. Details of suitability can be found in the relevant product data sheets.
The INDUCON induction welding system is installed exclusively by trained and certified BRUGG Pipes installation personnel. Further information can be found here.
Advantages:
Image caption:
A = Coil winding tool, B = Sleeve body, C = Welding generator, D = Control cable, E = Weld-in plug, F = Alarm component, G = Welding band
Heat-shrink sleeve
The PREMANT heat-shrink sleeve is used to insulate pipe joints in pre-insulated district heating pipes. Once the medium pipe has been welded, it restores the original structure of the pipe system and ensures a permanently secure connection between the PE casing pipes.
The heat-shrink sleeve consists of a heat-shrinkable sleeve pipe made of high-density polyethylene (PE100) and is pushed onto the PE casing pipe before the medium pipes are welded together. After welding, it is positioned over the joint and heat-shrunk onto the casing pipe.
Depending on the project requirements, sealing can be carried out using the PREMANT double-seal system or the INDUCON induction welding system.
In combination with the PREMANT double-seal system, the non-cross-linked heat-shrink sleeve forms the type-tested UNLINCON sleeve system. In combination with the INDUCON induction welding system, it forms the tested INDUCON sleeve system.
The successfully completed tests in accordance with EN 489 confirm the watertightness as well as the mechanical and thermal performance of the respective sleeve systems.
Heat-shrink reducing sleeve
The PREMANT heat-shrink reducing sleeve is used to insulate steel reducers welded into pre-insulated district heating pipes on site.
Depending on the requirements, the reducing sleeves are available in straight or multi-stage versions and enable professional insulation of pipe reductions and other components with different casing pipe diameters.
The sleeve is made of high-density polyethylene (PE100) and, like the heat-shrink sleeve, is pushed onto the PE casing pipe before the medium pipes are welded together. After welding, it is positioned over the joint and heat-shrunk onto the casing pipe.
Depending on the project requirements, sealing can be carried out using the PREMANT double-seal system or the INDUCON induction welding system.
Advantages
End sleeve
The PREMANT end sleeve is used to provide a permanent seal at pipe ends in pre-insulated district heating pipes, reliably protecting the PUR insulation against moisture and external influences.
It is made of high-density polyethylene (PE100) and is available in single-stage or two-stage versions, depending on the requirements, with or without matching installation accessories.
The sleeve is pushed onto the PE casing pipe before the medium pipes are welded together. After welding, it is positioned over the pipe end and heat-shrunk onto the casing pipe. The closed-end design ensures secure sealing of the pipe end.
Two-stage versions are also suitable for insulating single-use ball valves (service ball valves) and allow them to be securely integrated into the pre-insulated pipe system.
Depending on the application, sealing can be carried out using the PREMANT double-seal system or the INDUCON induction welding system.
Fitting sleeves
Fitting sleeves are used to insulate non-pre-insulated fittings, such as bends, branches or hot tapping connections, that have been welded into the medium pipework on site.
They are manufactured from high-density polyethylene (PE100) and enable complex pipe geometries to be insulated correctly. The fittings are manufactured to project-specific customer specifications.
For installation, the fitting sleeve is cut open longitudinally to suit the installation conditions, positioned over the fitting to be insulated and then permanently sealed again using PE extrusion welding. The joint is subsequently insulated with PUR foam in accordance with the installation instructions.
Orders are placed using the relevant order form on the BRUGG Pipes website. The required dimensions and geometric data (e.g. pipe dimensions, angles, lengths or fitting design) must be specified on the form.
Fitting sleeves are supplied without installation accessories, as the insulation and sealing methods depend on the project.
BRUGG Pipes carries out professional installation using trained installation personnel.
Depending on the application, sealing can be carried out using the PREMANT double-seal system or the INDUCON induction welding system.
RMBD sleeves
RMBD sleeves have been specially developed for the insulation of valves and fittings, as well as for system transitions between PREMANT pipe systems and flexible pipe systems from BRUGG Pipes.
Their balloon-shaped geometry provides additional space and is ideally suited to components with complex geometries, such as ball valves or pipe couplings.
The sleeves are made of high-density polyethylene (PE100) and are installed over the valve, fitting or coupling according to project-specific requirements. The sleeves are not designed to be shortened.
Depending on the application, sealing can be carried out using the PREMANT double-seal system or the INDUCON induction welding system.
In combination with the PREMANT double-seal system, the RMBD sleeve forms the tested RANGECON sleeve system.
RMBD sleeves enable secure and permanently watertight insulation of valves, fittings and system transitions in pre-insulated district heating networks.
