In areas where hydrogen pipelines pass through, does the explosion-proof rating of all electrical equipment need to be upgraded?
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Since one DN25 hydrogen pipeline needs to pass through existing equipment, the design department has proposed that the explosion protection rating of all electrical equipment within a radius of 4.5 meters along the pipeline should be upgraded to IIc. Is there any way to circumvent this requirement?
In accordance with the safety requirements for hydrogen pipelines, electrical equipment in areas where such pipelines pass must meet the explosion-proof rating of IIc or higher. If your design department suggests an upgrade to the explosion-proof rating of the electrical equipment, it is best to follow that recommendation. This is to ensure the safety of people and property. If you wish to avoid the requirements regarding upgrading the explosion-proof rating of electrical equipment, you can consult the relevant regulatory authorities to see if there are alternative solutions or to apply for a special safety assessment procedure. It should be noted, however, that higher security risks arise in such cases, so it is necessary to handle them with great caution and care. .
Areas outside the production plant area where overhead pipelines for transporting flammable materials are installed in an open or exposed manner can be designated as non-explosion hazardous areas, although the valves in such areas are to be determined according to specific circumstances. Excluding the flanges and valves of the pipes, other locations can be determined based on the actual site conditions. If the site conditions are poor and there is a risk of accidents, or if the investment amount is low, it is possible to set the explosion protection level to IIC. If the site conditions are good or the investment amount is large, it may not be necessary to raise the explosion-proof rating.
No, leakage is not considered for welded pipes