Is it very dangerous to load and unload material below the floating disk of an internal floating roof tank?

When the liquid level is below the floating disk, air mixes with the fluid vapor; when static electricity builds up, an explosion can occur easily

The poster is referring to the **ten prohibitions issued by the Work Safety Administration, which strictly forbid the operation of equipment and facilities in oil and gas storage areas when they are in faulty condition. The ten prohibitions regarding fire and explosion prevention in such areas explicitly state that it is forbidden for internal floating roof storage tanks to operate with their floating roofs at the bottom. The regulations clearly state that it is strictly prohibited to operate oil and gas storage tanks at temperatures, pressures, or liquid levels beyond safe limits, as well as to change the storage medium arbitrarily ； It is strictly prohibited for operators to leave the site when manually removing water, switching tanks, or loading/unloading vehicles in oil and gas tank areas ； It is strictly prohibited to shut down the safety valves and cut-off valves of operational oil and gas storage tanks, as well as to install blind flanges on the pressure relief and discharge systems ； It is strictly prohibited to disable the temperature, pressure, level, as well as combustible and toxic gas alarm and interlock systems in the oil and gas tank farm ； It is strictly prohibited to perform welding work or enter confined spaces in oil and gas tank areas without conducting gas testing and obtaining an operation permit ； It is strictly prohibited for the floating disk of an internal floating roof tank to touch the bottom during operation ； It is strictly prohibited to directly add substances of unknown properties or those that may undergo violent reactions into oil and gas storage tanks or the pipelines connected to these tanks ； The use of non-explosion-proof lighting, electrical equipment, tools, and electronic devices in oil and gas tank areas is strictly prohibited ； It is strictly prohibited to allow unqualified personnel and contractors without the necessary qualifications to work in oil and gas tank farms; motor vehicles and unauthorized individuals are not permitted to enter such areas without permission ； It is strictly prohibited to operate equipment and facilities in oil and gas tank farms when they are in poor condition or malfunctioning.

Internal floating discs are generally sealed with nitrogen – haven’t you done that? ，？

When adding a nitrogen seal, does one need to consider that the floating disk cannot touch the ground?

When adding a nitrogen seal, does one also need to consider that the floating disc cannot touch the ground?

When adding a nitrogen seal, does one also need to consider the issue that the floating disk cannot touch the ground? I’ve read the ten prohibitions; he is worried about the formation of vapor phases, but do I still need to consider nitrogen sealing?

The ten prohibitions must be enforced; the documents issued by the Work Safety Administration must be followed, even though everyone knows that there is no danger when the floating platform touches the ground.

The materials in the storage tanks are always emptied at the request of customers or for settlement purposes, and it seems impossible to comply with the regulations issued by the State Administration of Work Safety in such cases.

Non-commercial reservoir areas might be a bit easier to manage. For commercial reservoir areas like ours, where we have to regularly ship goods at customers’ request, it’s really difficult to carry out such tasks.