4- Types of Storage Tanks

Question 1

Atmospheric storage tanks in the petroleum industry are normally used for fluids having a ,,,,,,

Answer 1

true vapor pressure that is less than atmospheric pressure

Question 2

Vapor pressure ,,,,,,,, with increasing temperature

Answer 2

increases

Question 3

The ,,,,,,,,,, tank is designed to minimize filling and breathing losses by eliminating or minimizing the vapor space above the stored liquid

Answer 3

floating-roof

Question 4

Low-pressure storage tanks are those designed to operate with pressures in their gas or vapor spaces exceeding the,,,,,,,, gauge permissible in API 650, but not exceeding the ,,,,,,,, gauge maximum limitation of API 620

Answer 4

2.5 lbf/in.2 (18 kPa)

15 lbf/in.2 (103 kPa)

Question 5

Low-pressure storage tanks are used for the storage of the ,,,,,,, fluids having a true vapor pressure exceeding the pressure limits of API 650, but not more than ,,,,,,,,,, gauge

Answer 5

more volatile

15 lbf/in2 (103 kPa)

Question 6

Pressure vacuum vents limit the pressure differential between the tank vapor space and the outside atmosphere to a few _______ per square in. (in²)

Answer 6

ounces

Question 7

The most common type of AST is the fixed ______ ______ tank.

Answer 7

cone roof

Question 8

Which type of floating roof is no longer permitted under API 650 Appendix C? (single steel ______ without annular __________s)

Answer 8

deck pontoon

Question 9

__________ _________ roofs may be applied to any diameter tank without the need for internal supporting columns.

Answer 9

geodesic dome

Question 10

Metallic internal floating roofs on floats have their deck above the liquid, supported by closed ________ compartments for buoyancy. They are typically constructed of ________ alloys or Stainless Steel.

Answer 10

pontoon

aluminium

Question 11

Other less common AST roof details include the _________ type roof and the _________ type roof.

Answer 11

lifter

breather

Question 12

The foam seal for Steel Floating roofs has a polyurethane envelope, which is must be a minimum of ____ mils.

Answer 12

15

Question 13

Venting requirements are covered in API ________

Answer 13

2000

Question 14

Tanks that have cylindrical shells and cone/dome roofs are typically used for pressures less than about _______ lbf/in².

Answer 14

5

Question 15

Spheres, nodes spheres and hemisphere tanks are commonly used for pressures above _______lbf/in²

Answer 15

5

Question 16

Which type of sphere is no longer constructed?

Answer 16

noded