Section 6 & 7 Flashcards
Inspection & Materials
Who can perform the routine in-service inspections?
Anyone knowledgeable of the operations, the tank, and product stored in the tank
API 653 par 6.3.1.1
What membrane stress is that is required to cause a brittle fracture?
7 ksi (7000 PSI)
API 653 par 5.3.7
How often must the routine-in-service inspection by performed?
At least MONTHLY
API 653 par 6.3.1.2
Who is required to perform external inspections?
Authorized Inspector
API 653 par 6.3.2.1
What is the required inspection interval for an external inspection?
Lesser of 5 years or RCA/4N
API 653 par 6.3.2.1
Who determines the extent of thickness measurements?
Owner/Operator
API 653 par 6.3.3.1
What is the maximum interval for taking thickness measurements, when the corrosion-rate is not known?
5 years
API 653 par 6.3.3.2a
What is the required interval for taking thickness measurements, when the corrosion-rate is known?
Lesser of 15 years or RCA/2N years
API 653 par 6.3.3.2b
When is it acceptable to not take thickness measurements?
If the Internal Interval is shorter than the thickness monitoring internal
API 653 par 6.3.3.3
Surveys of the cathodic protection system is performed in accordance with what code?
API 651
API 653 par 6.3.4.1
What is the required internal for performing cathodic protection surveys?
Annual
API 653 par 6.3.4.1 & API 651 par 11.3.1.2
How often must the sources of impressed current be checked on a cathodic protection system?
At least every two months
API 653 6.3.4.1 & API 651 par 11.3.2.2
Who must conduct the internal inspection and supervise the collection of data?
Authorized inspector
API 653 par 6.4.1.2
When can an on-stream inspection be perofrmed in lieu of visual internal inspection of the tank?
When the inspection is being performed to determine the condition of the tank bottom
API 653 par 6.4.1.2
By what date must the tank owner/operators have to be in compliance with API 653
January 2017
API 653 par 6.4.2
What is the longest initial internal inspection internal allowed by API 653?
30 years (10 year base interval plus 10 years RPB plus 10 years for SS bottom) See Table 6.1
API 653 par 6.4.2.1.1
What is the longest initial internal inspection interval allowed by API 653 for an oil storage tank without safeguards or RPBs?
10 years
API 653 par 6.4.2.1.1
What is the maximum internal inspection interval, if an RBI was not performed and no other special condition is applicable?
10 years
API 653 par 6.4.2.1.2
A tank that contains a highly viscous materal which will solidify above what temperature is not required to meet the maximum internal inspection interval requirement?
< 110°F
API 653 par 6.4.2.1.2(1)
What is the longest subsequent internal inspection interval allowed by API 653 for an oil storage tank with remaining corrosion allowance that is greater than 150 mils?
20 years
API 653 par 6.4.2.2.1
What is the longest subsequent internal inspection inteval allowed by API 653 for an oil storage tank without safeguards and remaining corrosion allowance is greater than 150 mils?
20 years
API 653 par 6.4.2.2.1
How often must a RBI assessment be reviewed?
Every 10 years or sooner if warrnated by process, equipment or consequence changes
API 653 par 6.4.2.2.2
When is it allowed to not scan the tank bottom during an internal inspection to determine external thickness loss?
When the bottom thickness can be determined by external means
API 653 par 6.5
What type of records is the owner/operator required to maintain?
Construction, inspection, and repair/alteration records
API 653 par 6.8.1
Who must write the external and internal reports?
Authorized Inspector
API 6.9.1
How long must external and internal inspection reports be kept?
Life of the tank
API 653 par 6.9.1
What test must be performed if adequate identification is not available for shell or bottom plates?
Chemical analysis, and mechanical testing (Charpy and Tension test)
API 653 par 7.3.1.2
