Cover drains are defined by the US EPA in AP-42 as either “open” or “closed”. Closed drains are not typically used on aluminum floating covers. Open cover drains can be either “flush” or “overflow”. Overflow drains are not typically used on aluminum floating covers either. We are left with open drains that are flush with the cover and extend to the liquid under the cover to allow liquid to drain off the floating cover. These are also called “stub drains” or “automatic drains”. Since they are open, this type of drain is a source of emissions. Read more from the Nov/Dec 2015 issue of Tank Storage Magazine…
DISCUS Technical Bulletins
Archive for the “Internal Floating Tank Covers” Category
The DISCUS cover does not have drains, and is built as a series of bulkheaded open compartments. We’ve had countless discussions on the various scenarios that can lead to liquid on the top of a cover, and what to do about it. In this post, we’ve highlighted some of the most common concerns. Continue reading
“I am a firm believer when you represent a company and you do good quality work, your company moves forward and so do you.”
Donna Black recently installed her first DISCUS full contact aluminum floating cover, as Field Superintendent, for a project in Southwest Houston for a Major US Pipeline/Terminal company. Donna brought her experience to the project, having worked in the industry since 2009 for companies including: HMT Tank Services, General Engineering Corp, and Tampa Tank. We spoke with Donna about her experience installing the DISCUS cover.
Managing enclosed floatation compartments on aluminum internal floating covers (AIFCs) which are well known to leak is a matter of mitigation. As an obvious threat to safety, and in order to guarantee a safe, gas free work area, every enclosed compartment has to be cautiously and properly checked, carefully purged if hot, and then replaced, since the hot condition was caused by a failure of the component. This mitigation process is dangerous, time consuming and costly.
The DISCUS OpenRaft™ aluminum internal floating cover (AIFC) has no enclosed spaces.