API 2207 Preparing Tank Bottoms for Hot Work Flashcards
- Prior to beginning hot work on a tank bottom, safety inspections should be conducted to determine the oxygen content of the tank. What is the acceptable range of oxygen content? (API 2207-17, Section 4.1.5)
19.5% - 22.5%
As part of the general precautions for tank bottom hot work, what safety equipment should be available and ready for instant use? (API 2207-17, Section 4.1.7)
- What must be done in order to weld on steel that has been in contact with leaded gasoline without using supplied-air respiratory equipment? (API 2207-17, Section 4.2.7)
On each side of a line that might be heated excessively by welding or other operations, an area of at least 12 inches wide ( 30cm)should be scraped to bare metal
- Where should grounding leads from a welding machine be attached? (API 2207-17, Section 4.2.12)
Directly to a bared surface on the shell of the tank on which hot work is to be preformed
In what position should compressed gas cylinders used for cutting operations be kept?
Where should these cylinders be located? (API 2207-17, Section 4.2.13)
In what position should compressed gas cylinders used for cutting operations be kept?
Where should these cylinders be located? (API 2207-17, Section 4.2.13)
- If minor repairs are to be performed on a tank bottom where flammable vapors are suspected to be present under the tank bottom, what procedure may be used to prevent ignition of the vapors? (API 2207-17, Section 6.2)
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b)
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- If major repairs are to be performed on a tank bottom where flammable vapors are suspected to be present under the tank bottom, what procedure may be used to prevent ignition of the vapors? (API 2207-17, Section 6.3)
a)
b)
c)
d)
e)
f)
When using water flooding to displace flammable liquids and vapors from beneath a tank bottom, how high should the earthen dike be that surrounds the tank? How far away should the dike be from the tank shell? (API 2207-17, Section 6.3.2)
