Safety standards of radiation protection doors
Service and maintenance for radiation protection doors
Our service technicians have the driving technological, mechanical, metal engineering and electro-technical know-how, which is necessary to repair existing radiation protection doors.
You can considerably prolong the lifetime of doors, gates, windows and power driven systems by regular maintenance. Defects can be detected and repaired at an early stage. Thereby total losses can be avoided. Furthermore you protect yourself from personal injuries and loss of insurance coverage.
The following maintenance tasks can be done by us:
- Radiation protection gates and doors, acc. to EN 12635: Gates, installation and usage, incl. the required clamp force measurement (see below)
- Power operated gates and doors in industrial enterprises and in public areas, acc. to EN 12635 gates, installation and usage as well as EN 12453 gates, usage safety of power operated gates, requirements
- Fire protection doors, fire and smoke barriers according to the general building inspectorate approval.
- Hold open systems according to EN 14637 and DIN 14677, inspection according to the building inspection guidelines of the Institute for Structural Engineering Including the inspection of smoke switch systems
- Escape route – protection systems, like door magnet-system, or electric locking devices
- Natural smoke venting systems, acc. to DIN 18232-2
Smoke and heat control systems – part 2: Natural smoke venting systems
In case your object is not listed above, kindly check with us if we have the necessary expert knowledge for your object.
After signing of a maintenance contract, our expert inspects and records the objects to be maintained. In case of loss, we establish the necessary inspection books and organize the maintenance handbooks of the manufacturers, respectively the general building inspectorate approval. The original inspection books remain with you, additionally we will keep copies of the inspection books. The annual general maintenance dates will be marked in our calendars, thus they won’t be forgotten. All maintenance steps are documented in check lists, which we developed ourselves, and they will enable you to explain the condition of your object to the authorities at any time. We will be happy to tell you our references and to convince you of our expert knowledge.
Measurement of operational forces of radiation protection gates
Clamp forces of power driven radiation protection doors must be limited, in order to prevent broken bones, contusions or head injuries by pinching, shearing, knocking over or pulling in by the power operated radiation protection door. In order to guarantee this for all our doors, in addition to the initial testing by a recognized institution, we measure the clamp forces of all our doors during the start-up procedure and add the testing records to the documentation.
To verify that your radiation protection door’s clamp or operational forces are not too high, you can perform the simple test, as described below. You need to get a 20 mm thick standard Styrodur plate (material 2800 C) from your local D-I-Y store. Out of this plate you cut strips of 65 mm width and 400 mm length.
First you take two of these prepared strips on top of each other and press them firmly against the counter closing edge of your gate. Then you close the door and check if one or both Styrodur strips have been damaged. If both strips are still intact, repeat the test with just one strip. If at least one strip is damaged by this test, you should call an experienced inspector, who can measure the precise clamp or operational forces of your power driven gate system. If the strips remain undamaged, it will be sufficient if you ask the expert, who performs the yearly maintenance, to measure the closing forces and to give you the measurement records.
The following video was recorded to better visualize an approximate estimation as well as a precise measurement of the clamp or operational forces with the proper measuring tool.
Measuring the clamp forces of a radiation shielding door of 27,5 tons.
At first you will see:
A rough estimation of safe clamp forces with a Styrodur body with a cross section of 20 x 65 mm.
Proper measurement of clamp forces with a special measuring tool, taking 27 individual measurements at 9 places in the area of the closing edge and the counter-closing edge.
400 N are allowed during the first 0,75 seconds, 150 N are allowed between 0,75 to 5 seconds and afterwards no forces above 25 Newton are allowed.