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Questions and Answers
What method is used to calculate the minimum shell thickness for a 260 foot tank?
What method is used to calculate the minimum shell thickness for a 260 foot tank?
- API 650 1 foot method
- API 653 shell formula
- Variable design point method (correct)
- ASME Section VIII, Div 2 method
What method is used to calculate the minimum shell thickness for a 160 foot storage tank?
What method is used to calculate the minimum shell thickness for a 160 foot storage tank?
- API 650 1 foot method (correct)
- API 653 shell formula
- Variable design point method
- ASME Section VIII, Div. 2
New roof plates should be at least ______ thick
New roof plates should be at least ______ thick
3/16
New bottom plates should be at least _____ thick
New bottom plates should be at least _____ thick
New bottom plates should extend _____ inches beyond the bottom to shell weld
New bottom plates should extend _____ inches beyond the bottom to shell weld
Welders who weld tank pressure parts should be qualified to
Welders who weld tank pressure parts should be qualified to
In tank bottoms, 3 plate laps should be at least _____ apart
In tank bottoms, 3 plate laps should be at least _____ apart
RT film used to evaluate shell welds should have a diagnostic length of ______ inches
RT film used to evaluate shell welds should have a diagnostic length of ______ inches
Welders should stamp their welds every _____ feet
Welders should stamp their welds every _____ feet
When using a vacuum box, the standard pressure used during the exam should be a vacuum of ______ psig
When using a vacuum box, the standard pressure used during the exam should be a vacuum of ______ psig
All shell butt joints must have complete penetration and complete _______
All shell butt joints must have complete penetration and complete _______
Peaking is a potential problem with:
Peaking is a potential problem with:
Repads are tested using a ________ psig air test
Repads are tested using a ________ psig air test
What does annex M pertain to
What does annex M pertain to
What does Annex F pertain to
What does Annex F pertain to
What height should the tank grade be above ground?
What height should the tank grade be above ground?
Single welded lap joints are permissible only on bottom and roof plates
Single welded lap joints are permissible only on bottom and roof plates
The 1st shell course vertical seam may be inline with the 2nd course shell seam
The 1st shell course vertical seam may be inline with the 2nd course shell seam
As pressure (Liquid height) increases, this puts increasing strain on which welds?
As pressure (Liquid height) increases, this puts increasing strain on which welds?
Which, per code, should be completed first?
Which, per code, should be completed first?
What is the maximum permissible temperature when designed to annex M
What is the maximum permissible temperature when designed to annex M
What is the smallest lettering size allowed on the nameplate?
What is the smallest lettering size allowed on the nameplate?
A roof is considered frangible if the roof to shell joint will fail prior to the shell to bottom joint in the event of excessive internal pressure
A roof is considered frangible if the roof to shell joint will fail prior to the shell to bottom joint in the event of excessive internal pressure
External ultrasonic thickness measurements of the shell while the tank is in service can be a means of determining the rate of uniform corrosion. The extent of UT measurements shall be determined by the owner/ operator. What is the maximum interval of such thickness measurements when the corrosion rate is not known?
External ultrasonic thickness measurements of the shell while the tank is in service can be a means of determining the rate of uniform corrosion. The extent of UT measurements shall be determined by the owner/ operator. What is the maximum interval of such thickness measurements when the corrosion rate is not known?
What welds do not require welders identification?
What welds do not require welders identification?
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