Section 3

Question 1

What is an ‘Alteration’?

Answer 1

Physical change with design implications

API 653 par 3.1

Question 2

What is an Authorized TANK inspector?

Answer 2

Employee of an Authorized Inspection Agency qualified and certified

API 653 par 3.4

Question 3

What is breakover point?

Answer 3

Area on a tank bottom where settlement beings

API 653 par 3.5

Question 4

What is candiate tank?

Answer 4

Tank for which corrosion rates are not known

API 653 par 3.6

Question 5

What is the critical zone?

Answer 5

Portion of the tank bottom or annular plate within 3” of the inside edge of the shell, measured radially inward

API 653 par 3.10

Question 6

What is door sheet?

Answer 6

Section of plate (or plates) cut from existing tank shell to create a temporary access opening

API 653 par 3.13

Question 7

Dimension of a shell penetration that is considered to be a major repair or alteration?

Answer 7

> º12” NPS

API 653 par 3.20 (a)

Question 8

Installing a bottom penetration within what distance of the shell is considered a major repair or alteration?

Answer 8

within 12” of the shell

API 653 3.25 (b)

Question 9

Removing and replacing, or adding a shell plate beneath the design liquid level where the longest dimension exceeds what dimension is considered a major repair or alteration?

Answer 9

> º12”

API 653 par 3.20 (c)

Question 10

Removing and replacing or adding a section of annualr plate ring where the longest dimension exceeds what dimension is considered a major repair or alteration?

Answer 10

> º12”

API 653 par 3.20 (d)

Question 11

Removal and replacement of annular plate ring weld or vertical shell weld where the longest dimension exceeds what dimension is considered a major repair or alteration?

Answer 11

> º12”

API 653 par 3.20 (e)

Question 12

What length of a bottom-to-shell would be a major repair/alteration if greater than 50% of the cross-section of the weld is repaired?

Answer 12

> º0”

API 653 par 3.20 (g)

Question 13

What is a repair?

Answer 13

Work necessary to restore a tank to a condition for safe operation

API 653 par 3.32

Question 14

What is a repair organization?

Answer 14

An organization that meets any of the following:

a) an owner/operator of aboveground storage tanks who repairs or alters his/her own equipment in accordance with
this standard;
b) a contractor whose qualifications are acceptable to the owner/operator of aboveground storage tanks and who
makes repairs or alterations in accordance with this standard;
c) one who is authorized by, acceptable to, or otherwise not prohibited by the jurisdiction, and who makes repairs in
accordance with this standard.

API 653 par 3.33