Floating Roof Tank Grounding

Most fires on floating roof tanks are small rim fires caused by vapor leaking through the seals.

Floating roof tank grounding.

The roof rises and falls with the liquid level in the tank. Temperature rating 25 c to 55 c. Poor tank turnaround practices with inadequate checking of roof supports. The lec retractable grounding assembly rga provides the lowest possible impedance bond between the floating roof and tank shell.

They are prone to wear issues as well as being sensitive to tank deformation. 216 v to 250 v power rating. 1 tank connected without insulating joints to a grounded metallic piping system. Failures of floating roof primary and secondary seals foam filled or liquid filled have been a significant concern.

As opposed to a fixed roof tank there is no vapor space in the floating roof tank. Floating roof tanks are designed to reduce emissions by eliminating the buildup of vapors above volatile liquids using decades old technology for sealed roofs that float up and down on top of the. In principle this eliminates tank breathing loss and greatly reduces the evaporative lo. It is easy to install on both new and existing tanks.

The rga is able to do this better than other methods because designers analysed and found ways to overcome the weaknesses of other traditional devices for grounding floating roof tanks. 108 v to 125 v 220 240 v 50 60 hz system supply voltage range. There was a fatality on a large diameter floating roof tank when a contractor died under the weight of the roof plates which collapsed on him. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.

110 120 v 50 60 hz system supply voltage range. Groundguardian floating roof tank monitor reel. An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. Floating roof tanks seals on floating roof fr shall be bonded to the shell by shunts type 302 28 gauge 2 inch wide stainless steel straps at maximum 10 ft spacing all metal tanks all must be grounded by one of the following.

Storagetech storage tank internal floating roofs storagetech has been proudly innovating designing manufactiring and installing external and internal pon. Studies by the api american petroleum institute have shown these shunts often fail to provide the required contact between the roof and wall. Lec has developed a roof shell bonding mechanism that fulfills all of these requirements. It is also easy to inspect test and maintain.

Floating roof tank shunts shown in the image above used for many years as the default method to earth out ground the roof to the tank wall.