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API 570 - Question On Open And Closed Book: Q’s & A’s
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API 570 - Question On Open And Closed Book: Q’s & A’sIf the probable corrosion rate for a new piping system or a piping system for
which service conditions are being changed cannot be determined, when shall
initial non-destructive thickness measurement determination be made?
a) After no more than three months of service.
b)After no more than six months of service.
c)After no more than nine months of service.
d) After no more than twelve months of service Right Ans - A
When is the next inspection sate for a class 3 piping system, last inspected on
August 15, 2006, if the remaining life is determined to be 12 years?
a) 15-Aug-16
b)15-Aug-09
c)1-Apr-10
d)15-Aug-12 Right Ans - D
Select the minimum thickness to order for the pipe selected, considering
manufacturers minus tolerance for the following conditions: ASTM A53 Grade
B, NPS 4, with a pressure design thickness of 0.400 in. and a corrosion
allowance of 0.125 in (round to closet 0..001 in)
a) 0.674 in
b) 0.450 in
c) 0.531 in
d) 0.575 in Right Ans - A
The owner/user shall maintain appropriate permanent progressive records of
each piping system covered by API 570. What information shall these records
contain?
a) piping system service
b) welding procedure classifications
c) documents necessary to record the name of the companies performing the
testing
d)All of the above Right Ans - A
, For a GMAW-S PQR with back purge of a groove welded pipe test coupon
0.375 in. thickness, P-No.3 to P-No 3 base metal, with 250 F preheat, what is
the thickness range of base metal that can be qualified?
a) 0.188-0.375 in
b) 0.063-0.413 in
c) 0.063-0.750 in
d) 0.188-0.750 in Right Ans - B
For existing piping systems, how shall corrosion rates be calculated?
a) on either a short term or long term basis
b) on either a short term or a long term basis as selected be the authorized
inspector
c) on wither a short term or long term basis as selected be the piping engineer
d) on either a short term or a long term basis, whichever is the longest
Right Ans - A
During a SMAW Procedure qualification, if the WPS lists a minimum preheat
of 250 F and the test coupon was welded with a 149F minimum preheat, what
would be the qualified preheat temperature if all other tests passed?
a) 149F minimum
b) 250F minimum
c) none, since preheat is essential variable and the PQR would not support the
WPS
d) 249F Right Ans - C
What is the maximum allowable flattening of a pipe bend to be used for
internal pressure?
a) <3% of nominal outside diameter
b)<5% of nominal outside diameter
c) <8% of nominal outside diameter
d) <12.5% of nominal outside diameter Right Ans - C
What are the criteria ion determining whether auxiliary SBP will need some
form of inspection?
a) potential for CUI
b) potential for ductile overloading situations
c) potential for stray current corrosion
d) all of the above Right Ans - A
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