Repair companies must be?
Experienced
(API 510 6.6)
What documents must relief devices repair organization maintain?
A. QC manual
B.
... [Show More] Documented training program
(API 510 6.6)
What is the primary factor for setting the relief device interval?
Performance
(API 510 6.6)
Who can set the relief device interval?
Inspector, Engineer OR Qualified other
(API 510 6.6)
What is the maximum relief device interval?
Typical: 5 years
Clean, non-corrosive, non-fouling: 10 years
(API 510 6.6)
Direction for setting the interval is found in the:
Owner's QA manual
(API 510 6.6)
Every vessel should have at least one relief device set at:
MAWP
(Sect VIII UG-134.a)
Safety valves are normally used in
Steam or Air service
(API 576 4.3.2)
Relief valves are normally used in:
Liquid service (these are also called incompressible fluids)
(API 576 4.4.2)
Safety-relief valves can be used in:
Liquid or Vapor service
(API 576 4.6.2 - But not very clear)
When is a balanced bellows safety relief valve generally used?
Variable back pressure
(API 576 4.7.1)
Pilot operated valves are useful when:
A large relief device is needed or there is a small difference between operating pressure and set pressure.
(API 576 4.8.2 a/b)
How smooth are a relief device's seating surfaces?
3 light bead/bands
(API 576 5.2.1)
Relief devices should be shipped in an:
Upright position
(API 576 5.8.2.2)
A pressure vessel is rated at 2000 psig at 450*F. The height of the vessel is 26 feet and the outside diameter (OD) is 6.625". The wall thickness is 0.432". The vessel material is carbon steel SA-106. Is this vessel covered by ASME section VIII?
No.
Reference: U-1 (c)(2)(i)
I.D is less than 6.0", since 6.625 - (2 x .432) = 5.716"
What is the minimum thickness allowed by the code for the shell of a new vessel that will be in hydrocarbon service?
0.0625".
Reference: UG - 16(b)
A cylindrical vessel has an outside diameter of 48" and a height of 16'. The vessel is in corrosive hydrocarbon service. What is the minimum allowed size of manhole?
16" circular.
Reference: UG-46(a), UG-46(f)(3), UG-46(g)(1)
Provide the section VIII definitions of "lethal substances".
Poisonous gases of liquids.
Reference: UW-2
A vessel is made of SA-516 gr. 60 ( carbon steel, a P-1 material). The shell is 3" thick and the heads are 1.750" thick. What is the holding time for the PWHT?
2 hours 15 minutes.
Reference: Table UCS-56 [Show Less]