Pengetahuan Produk dan Material Migas

Why do the internal floating-roof tanks have an additional dome roof on the top?

• To keep the rain out

• To allow the rain in

• To increase the vapour pressure of the stored product

• To decrease the vapour pressure of the stored product

• To keep the the floating roof stable from its load

Fixed roof tanks either be self-supporting or have column supports. Self-supporting roofs are...

• at the atmospheric pressure

• can be cone or dome types

• found on smaller tanks

• not having a top roof

• parts of sphere tanks

When installing underground tanks, what should be taken into account?

• Space availability

• Weather

• Traffic surrounding

• Maintenance

• Storing capacity

First plate of the shell welded to the bottom plate is called

• shell manhole

• bottom plates

• annular plate

• single-deck tank

• first course

What is the following found on the roof storage tank and functions as a vacuum regulator that has been set to a certain pressure?

• The splash plate

• Foam Chamber

• The pressure vacuum or breather valve

• Level Indicator

• Water Sprinkler

The annular plates of the tank floor are

• thicker than the bottom plates

• carrying the shell and/or self-supported roof weight

• sit directly underneath the roof supports

• sit directly underneath the shell plates of a tank

• lighter than the bottom plates

The following holes specified for people to enter and leave at the bottom of the storage tank shell and to allow people to enter the storage tank

• foam connection

• free vent

• gauge hatch

• roof manholes

• shell manholes

The following standard provides comprehensive guidelines for the design and engineering of aboveground storage tanks

• API 651

• API 650

• API 653

• NACE SP0294

• NACE SP0205

Reducers is used at pump suction to

• maintain the flow rate

• make the top surface flat

• increase the flow rate

• avoid the cavitation

• avoid the over pressure

Seamless pipe has advantages compared than those of welded pipes

• cheaper

• has no welds

• no tests required for weld integrity

• consistent wall thickness

• shorter manufacturing time