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Test Round 2021

Phase I

2021-12-01

2022-03-14

Test Round 2021

Phase II

2022-05-01

2022-08-15

Time schedule

Program "Flameproof Joints" (Test Round 2021)

For the program “Flameproof Joints (“FJ”) - Test Round 2021” the general routine procedure is described by the standard “Explosive atmospheres - Part 1: Equipment protection by flameproof enclosures “d”” - IEC 60079-1, Edition 7.0.


In the field of the type of protection flameproof enclosures, the equipment often has joints due to the constructional design or to ensure functionality. These joints must be designed in a way that they prevent flame transmission of an internal ignition in order to fulfill the requirements of the type of protection. To ensure this, the joints must comply with certain dimensional requirements specified in the standard mentioned above. All flameproof joints, whether permanently closed or designed to be opened from time to time, shall comply, in the absence of pressure, with the appropriate requirements of clause 5. Furthermore, the determination of the test gap forms the basis for the test for non-transmission of an internal ignition (clause 15.3). Therefore, the maximum gap of the flameproof joint has been selected as the measurand of interest which is to be compared in the program “Flameproof Joints – Test Round 2021”. In addition to this measurand of interest, the program also addresses the aspect of preparing/performing the test for non-transmission of an internal ignition (theoretical only).

The Test Sample “FJ” is a simplified construction for the simulation/representation of different flameproof joints consisting of three bolts and a hole plate with various borings. The outer dimensions are 320 mm x 100 mm x 52 mm (L x W x H).  The simple and robust design and homogeneity tests guarantee homogeneity and stability throughout the whole test round. In addition, the selected design of the test sample offers convenient manufacturing, preparation and transport possibilities. To ensure comparability and homogeneity, all Test Samples “FJ” are completely produced, prepared and provided by the coordinator.

The workload to perform this program is approximately 3 working days.

All detailed information, descriptions and dates for the implementation of the program will be available soon in the download section below.

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