Forsheda 576 Anger-LockTM metric, Non-integrated Sealing System for Potable Water Pipes

System Description

The Forsheda 576 Anger- Lock™ locked-in seal is a combined lip and compression seal which is installed inside the socket after it has been formed. Making the seal an integral part of the pipe eliminates many of the disadvantages of separate sealing rings.
The unique design comprises of a rubber sealing element bonded to the plastic retaining element which holds the seal securely in position during transport and pipe assembly.The seal is designed to absorb any permissible variations in the groove.

F576 Angerlock. Design and funtion. Trelleborg

Seal Performance

The F-576 Anger-Lock™ joint meets or exceeds current European Standards for pressure, vacuum, deflection and shear load.

The seal design gives low assembly forces making pipe jointing easier. 
F576 Angerlock. Trelleborg


  • Synthetic rubber

  • Hardness 60±5 IRHD

  • Approved in accordance with EN 681-1

  • Ozone resistant

  • Approved for contact with cold potable water


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Seal Dimensions



7.2 12.3
63 10.4 17.8
75 11.6 19.9
90 12.7 21.7
100 13.8 21.6
110 13.8 22.0
125 13.8 23.6
140 14.8 25.3
150 17.2 23.5
160 15.9 27.2
180 17.5 28.8
200 16.9 29.0
200* 20.2 32.0
225 18.0 30.8 
225* 21.8 33.8 
250 21.1 34.2 
250* 23.6 37.0
280 22.5 36.1 
300 23.7 40.4
315 23.6 37.6 
355 25.8 40.9 
400 28.0 44.9 
450 29.5 47.0 
500 31.6 51.4 
630 38.2 61.3
*AS/NZS 1477:2006 Series II
Please conctact Trelleborg Pipe Seals for technical advice and joint design recommendations to meet your performance requirements
F576 Angerlock. Trelleborg

Dimensions and designation

All data in millimeter.

On each seal, profile thickness, outer diameter, recommended pipe measurement and production period are given. The corresponding data are also on the packaging.

Subject to change for technical reasons

Video Joint Assembly

F576 Angerlock. Trelleborg

Step 1

The spigot and socket of the pipe should be checked for damage prior to jointing.

The pipe spigot should be chamfered with an angle of 15°, taking care to remove all burrs. Both spigot and socket including the sealing ring should be free from dirt and other foreign matter. 

Lubricant should be applied evenly to the spigot end of the pipe.

F576 Angerlock. Trelleborg

Step 2

Immediately after lubrication, the spigot should be brought into contact with the socket.

Both spigot and socket should correctly aligned and then slide the spigot into the socket, thus compressing the seal until the joint is fully made.



More detailed information

Datasheet F-576 Anger-Lock


Download (pdf)

Brochure F-576 Anger-Lock


Download (pdf)


Technical Approvals, Patents, Quality Standards

CE Mark


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