How to limit evaporation of liquid contents from API standard 650 mixed material tanks

API 650 internal floating roof oil tank executive standard: domestic design standard: GB50341-2003 "Vertical cylindrical steel welded oil tank design code"; domestic construction standard: GB50128-2005 "vertical cylindrical steel welded oil tank" Construction and Acceptance Specification; API standard 650 mixed material tanks Foreign design standard: API650-2007 "Standard for Welded Steel Petroleum storage tanks."

Oil tank is often used to store crude oil, diesel oil, gasoline and other oil. The main structure of API standard 650 mixed material tanks is composed of tank top, tank wall, tank bottom and accessories. The API standard 650 mixed material tanks should be inspected after the completion of construction, and the detection methods of different structure positions are different. Tank wall inspection: for the newly built oil tank, water filling test shall be conducted to check whether the tank wall is tight, and the appearance inspection shall be conducted for the tank wall plate and weld. Tank wall thickness detection: the oil tank wall thickness is mainly detected by ultrasonic wave, with high efficiency.

Aftershock Level Earthquake (ALE)
This design case shall be applicable only when regulations or project documents specifically require the tank system to be designed or evaluated for aftershocks.
If the outer tank is not designed as a secondary containment (i.e. it serves as vapor barrier and pressure boundary only and is not constructed of API 620 material suitable for the inner tank API standard 650 mixed material tanks), then no design or evaluation for ALE is required by these provisions for the inner or outer tank.

We can process the steel materials according to your drawing. Or if you can not make drawing, please send us API standard 650 mixed material tanks specific data and requirements, our technical department can make design and drawing for you, and then confirm with your technician or engineer. If all is OK, our processing center will process the steel materials according to the drawing. So no matter what size and shapes you need, we can meet demands at the most time.

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