API 1615 Installation of Underground Petroleum Storage Systems Flashcards
What is an extractor fitting? (API 1615, Section 2.29)
A fitting that threads into the bung which can have a riser on top along with a vent attached to the side of the extractor fitting.
Commonly has threads within the fitting for testing purposes
What is an interstice? (API 1615, Section 2.42)
The area outside the primary tank but still within the outer tank wall. Can be liquid filled or be empty space
What are some of the functions of a sump? (API 1615, Section 2.87)
Give technicians access to tank top without digging, give space for motors and pumps, be a leak detection basin for piping transitions.
What things should be included in a preconstruction site-specific plan? (API 1615,
Section 6.1.1)
pre-construction site-specific plan should include project details, site analysis, safety protocols, risk management, and communication strategies, ensuring a well-organized and safe construction process
Why is it important to install a property designed corrosion protection system when installing new steel tanks next to an existing steel UST system? (API 1615, Section 7.2.2)
If not installed correctly then the new system will cause the existing tank to corrode faster then it should
Where should underground tanks being stored temporarily at a construction site be located?
(API 1615, Section 9.1.4)
What type of chock should be used to prevent a tank from moving during storage?
(API 1615, Section 9.1.5)
Non-metallic or sharp, non abrasive and sturdy
What measurement should be taken prior to installation of an underground tank? (API
1615, Section 9.2.4)
Tank diameter to a marked bung in order to measure deflection when installed
Prior to pressurization in a preinstallation tank test the tank should be .
(API 1615, Section 9.5(b))
Factory plugs should be removed and steel plugs should be doped and tightened
What does the term “interstitial space” or “annular space” refer to? (API 1615,
Section 9.6.1)
secondary con-
tainment in which a storage tank is constructed with two
shells, or walls, with an interstice between to contain a
release from the primary tank.
When should piping be isolated and tested? (API 1615, Section 9.7.1)
After install but before the system is put into use. Before backfilling the trench
What are the API recommendations for depth of cover over tanks that are located in traffic
areas? (API 1615, Section 11.4)
For tanks in traffic areas, a minimum depth of cover is required to protect them from damage. This typically involves 3 feet of earth cover, or 18 inches of well-tamped earth plus 6 inches of reinforced concrete or 8 inches of asphaltic concrete.
What conditions can cause a tank to float? (API 1615, Section 10.2.1)
High water table, bathtub effect, not being ballasted correctly, no proper hold down force( hold down pad, deadmen, backfill force)
If _______can be expected, tanks should be anchored. (API 1615, Section 10.3.1)
High water table
How should anchor straps used with concrete anchor pads or deadmen be installed?
(API 1615, Section 10.3.3)
On the tank where the manufacturer recommends or has it marked.
How should tanks of different diameters be aligned? (API 1615, Figure 11)
Who can provide professional assistance in determining anchoring requirements?
(API 1615, Section 10.3.1)
The manufacturer of the tank
What should occur prior to installation of submersible pumps? (API 1615, Section 10.4.3)
Take a measurement of riser pipe to bottom of tank top ensure 4” off bottom.
What are the Environmental Protection Agency’s corrosion protection requirements for new tanks and product piping? (API 1615, Section 15.1)
How should metallic anchor straps be isolated from a steel tank? (API 1615, Section 10.3.5)
With dielectric material
How should underground piping be sloped? (API 1615, Section 13.2.2)
1/8” per foot
What should be avoided in order to decrease problems when tightness testing? (API 1615,
Section 13.2.4)
Loose fitting without thread sealant, bellies in piping.
What material should be used to assemble the aboveground portion of vent piping? What materials should not be used? (API 1615, Section 13.3.3)
Schedule 40 steel pipe.
Should not use pvc, plastic, rubber, fiberglass
What should be the minimum height of vent outlets above the adjacent ground surface? In what direction should vapors be discharged? (API 1615, Section 13.3.3)
12’ above ground dispersed vertically into the air
What should be the minimum rating of tees, elbows, and unions used in underground steel piping? What type of iron should these fittings be made of? (API 1615, Section 13.5)
Schd 80 fittings if buried and black maleable iron
Any FRP pipe used in an underground petroleum installation should be ______________.
(API 1615, Section 13.4.1)
Fiberglass pipe and fittings connections should conform to the following: (API 1615,
Section 13.4)
a)
b)
c)
What can be used to minimize the breakage of underground piping and vent lines?
(API 1615, Section 13.7.1)
?? Proper backfill and spacing of pipes
In an underground steel or FRP piping system, where should flexible joints be installed?
(API 1615, Section 13.7.1)
At either end of the run
Fiberglass piping can be used to create its own flexible joint provided that there is a straight run of at least ______ feet between directional changes. (API 1615, Section 13.7.3)
Prior to backfilling, the piping must be isolated and . (API 1615,
Section 11.2)
Tested under pressure
How thick should backfill be between piping and the sides and floor of the piping trench?
(API 1615, Section 11.3.2 and Figure 14)
6”
Why must care be taken when stakes, used in final grading and paving of the site, are driven
into the ground? (API 1615, Section 11.5)
To prevent hitting underground piping that is buried
Prior to placing a tank in operation, what testing should be completed? (API 1615,
Section 19)
Purging air from lines and testing the system to make sure it functions properly
When should final tightness testing be conducted on the piping? (API 1615, Section 19)
Before putting the piping into service
What can decrease the efficiency of suction pumping systems? (API 1615, Section 12.3.2
Bellies in piping or air pockets
For what type of pumping system does depth of the tank or length of the piping not affect
the performance of the pump? (API 1615, Section 12.2.2)
Submersible turbine motor
How far above the bottom of the tank should remote pumps be installed? (API 1615,
Section 12.4
4”
What should be installed by the tank manufacturer under fill and gauge openings in a tank?
(API 1615, Section 12.5.4)
Striker plate
What is the standard size of underground tank openings? (API 1615, Section 12.5.2)
4”
What type of design should all fill connection have? (API 1615, Section 12.5.5)
What identifying information should be present at each fill pipe? (API 1615, Section 12.6)
Product, size of tank,
What type of vapor recovery may be required when a tanker truck makes a delivery into an
underground tank? (API 1615, Section 17.1.2)
Stage 1 vapor recovery
What type of vapor recovery traps the vapor in the vehicle for eventual reuse? (API 1615,
Section 17.1.4)
Stage 2
(Decommission)
What happens to the vapors in a balance type vapor recovery system? (API 1615,
Section 17.2.1
vapors displaced during vehicle refueling are returned to the underground storage tank through a dedicated vapor return pathway, without the need for external power or vacuum
What are the three most common designs for Stage I vapor recovery systems? (API 1615,
Section 17.2.1
Manifold vent lines, coaxial system, two point system
If tanks are manifolded, what must be provided for Stage I vapor recovery to work?
(API 1615, Section 17.2.2.3)
Poppeted vapor recovery adaptors (dry brakes)
What is the primary difference between single-point manifold and two point Stage I vapor recovery systems? (API 1615, Section 17.2.3)
Two hoses from the truck in 2 point
How many tank openings are required for a coaxial Stage I vapor recovery system to be installed? (API 1615, Section 17.2.4)
1
What has Onboard Refueling Vapor Recovery (ORVR) led to the decommissioning of?
(API 1615, Section 17.1.4)
Stage 2
What are some types of leak detection methods? (API 1615, Section 18.3)
Line leak detectors, sump sensors
How can the interstitial space of a tank be monitored? (API 1615, Figure 28)
Liquid (brine) sensor
Leak sensor (420 VR)
