Inspection interlocks

When a block is inside, the entrance panel is closed and the inspection is ready to start. The inside of the stainless steel X-ray tubehead housing is clad in lead with an on/ofT shutter in front of a thin plastic X-ray window. The thin window is to ensure the IP 65 classification. The window is of plastic that is not affected by the cleaning agents. The on/off shutter is interlocked with the entrance and exit panels so X-rays can be kept on at all times without risk of radiation leakage or exposure of the frozen fish blocks prior to the actual inspection. 

Interlock so that it is not possible to operate centrifuge if lids and/or inspection ports are open... 

Does the facility have a program for regular inspection and testing of process safety valves and other process safety devices including interlocks ... 

Heaters and furnaces should also be designed in accordance with standards and codes. Boilers and heating units must be inspected periodically in accordance with codes, insurance requirements and state regulations. Proper controls, interlocks and fail-safe instnunentation must be provided. The heaters should also be provided with sight glasses for flame observation, monitoring devices for flame-out detection, and temperature alarms. 

Limits, interlocks and inspection. Cut-outs, limiting controls and interlocks are tested. 

Inspecting and maintaining the interlock system is a vital function. It is required to ensure general safety and to avoid risks of boiler explosion. Interlocks provide for the safe sequence of boiler startup and shutdown procedures. 

When a gas and vapor detection system is used either for fire protection or for personnel exposure protection, the system should be managed, inspected and tested on a scheduled basis, and maintained similar to any other major element of the fire protection system or any process safety interlock or safety instrumented system. 

Six-System Inspection Model The FDA s instruction manual for its investigators is a systems-based approach to inspection consistent with this guidance. The FDA defines six interlocked systems (1) the quality system which encompasses all the other systems, (2) a materials system, (3) a production system,... 

The technical paper described the interlock testing program to consist of more than merely verifying that the interlock works. There is also inspection of the interlock equipment for deterioration. The function test on instrumentation is required following mechanical work on one or more of the safety system elements. In short, all devices or systems that have been disturbed enough to affect their normal function will be function tested prior to being restored to service. [26]... 

Formal and systematic inspections of key equipment, safety devices, and safety interlocks. 

The hazards associated with inappropriate use of microwave equipment cannot be entirely prevented by interlocking devices and other safeguards. However, the risk can be minimized if the analyst continually inspects the system to ensure that the equipment is maintained in safe working order. If any portion of the microwave unit such as door seal or vessel casing becomes damaged by a serious event such as an acid spill, prolonged wear or impact, the safety of the equipment should be re-assessed before it is returned to service. 

Critical safety systems are usually considered to be those that are necessary for safe plant operation during processing and also those required for the safe shutdown of the plant in the event of an unanticipated malfunction. Within an incineration plant, examples of critical safety systems inclnde agent monitoring systems, testing or inspection of pressure rehef valves, ventilation flow and control systems, fire protection systems, emergency alarm and shutdown systems, process interlocks, and furnace temperature control systems. 

NFPA 30,5.13.6.1 4.4.12 All fire protection equipment, and associated alarms, interlocks, and controls, shall be properly maintained, and periodic inspections and tests shall be done in accordance with botii standard practice and tiie equipment manufacturer s recommendations. 

These procedures should include all necessary flushing, cleaning, inspections, and tests before introduction of chemicals, resins, or packing. They should consider and detail how chemicals will be introduced into the process and the subsequent operations required to bring the system up to operational capability. Careful consideration should be given as to how all control loops will be set up and tuned, on-line process and analytical instrumentation tested and calibrated, and alarm trips and interlocks verified. 

High-powered microwave equipment must be grounded to reduce electrical hazards. Metal objects may build a charge from the electrical field of the microwave equipment. Interlocks on doors protect access to hazardous microwave locations. The interlocks prevent unauthorized access to hazardous microwave locations. The interlocks require frequent inspections and testing to ensure they are working properly. Lockout and tagout procedures are important for servicing of microwave equipment. 

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