Rim Seal Floating Roof Tank

Rim seal floating roof tank fires represent one of the most dangerous threats for chemical and petrochemical storage farms.

Rim seal floating roof tank.

Floating roof seals literally thousands of tons of voc vapors escape through floating roof perimeter seals each year according to the u s. Hmt seal systems are customized for each specific tank with a variety of configurations component sizes and material options available to handle any application and stored product. A tight fitting secondary seal acts as an excellent secondary vapour barrier containment also protects the tank contents primary seal against weather elements debris. External floating roof seals are designed to prevent product loss and atmospheric contamination in the form of air shields from above ground storage tanks.

Rim mounted seals. Seal systems can be installed with the tank in service. An external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.

Floating roof tank rim seal protection system. The system is designed and manufactured for extremely fast detection and extinction of rim seal fires as per the international safety. Hmt offers a full line of primary and secondary seals for both internal and external floating roof tanks. Seal systems are designed to meet environmental regulations and ensure efficient operation in specific warehouse conditions.

The roof rises and falls with the liquid level in the tank. Grishma s tank guard floating roof tank protection is a fully automatic detection cum extinguishing system. It also serves at a safety device reducing the risk of combustible vapours in this area. These seals are always fitted above a conventional primary seal.

Mesa etp engineers each product to meet unique circumstances including floating roof and rim characteristics tank profile product stored schedule and economic situation. For this reason it is imperative that you select the proper perimeter seal for your floating roof storage tanks. As opposed to a fixed roof tank there is no vapor space in the floating roof tank. The design of these primary seals is therefore very important.

In principle this eliminates tank breathing loss and greatly reduces the evaporative lo. The causes of such disasters start with a rim seal fire that breaks out and grows undetected to a point that it spreads over the whole seal area and therefore the floating roof tank becomes surrounded by fire. Rim mounted secondary seals are fixed at the top of the rim plate on the floating roof. Industry data base shows that the oil industry has experienced several rim seal fires worldwide and some of them have developed into very large disasters.

Rim seal fire protection system.