API 570 CERTIFICATION FULL STUDY GUIDE |QUESTIONS AND VERI-
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service?
ANSWER
10%
For welded pipe, the normal thickness of under-tolerance is?
ANSWER
.010 or 10 mils
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on
which weld orientation?
ANSWER
Longitudinal weld
The corrosiveness of soils can be determined by measuring the soils:
ANSWER
Resistivity
In severe refinery services which type of pipe is normally used?
ANSWER
Seamless pipe
When qualifying a weld procedure the essential variables must:
ANSWER
1
,Be recorded on both the WPS & PQR
A pipe has a thickness designation of "40S". What does the "S" mean?
ANSWER
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above:
ANSWER
2 inches
A propane piping system should be classified as?
ANSWER
Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for:
ANSWER
Blind flanges
Preheat should never be substituted for PWHT if:
ANSWER
The PWHT was used to prevent environmental cracking.
During welding, non-esential variables:
ANSWER
Must be recorded only on the WPS and must be followed by the welder.
During a hydrotest, all joints should be:
2
, ANSWER
Left uninsulated
ASME/ANSI B16.5 requires flanges to be:
ANSWER
Marked with the class rating.
Graphitization of carbon steels begins to occur when metal temperatures exceed:
ANSWER
800°F
During pipe fabrication who has overall responsibility for compliance with the code?
ANSWER
The owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:
ANSWER
3%
Who has the responsibility to determine the extent of PMI (Positive Material Identification)
performed?
ANSWER
The owner/user
A welder becomes unqualified when he has not welded in:
ANSWER
6 months
3
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service?
ANSWER
10%
For welded pipe, the normal thickness of under-tolerance is?
ANSWER
.010 or 10 mils
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on
which weld orientation?
ANSWER
Longitudinal weld
The corrosiveness of soils can be determined by measuring the soils:
ANSWER
Resistivity
In severe refinery services which type of pipe is normally used?
ANSWER
Seamless pipe
When qualifying a weld procedure the essential variables must:
ANSWER
1
,Be recorded on both the WPS & PQR
A pipe has a thickness designation of "40S". What does the "S" mean?
ANSWER
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above:
ANSWER
2 inches
A propane piping system should be classified as?
ANSWER
Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for:
ANSWER
Blind flanges
Preheat should never be substituted for PWHT if:
ANSWER
The PWHT was used to prevent environmental cracking.
During welding, non-esential variables:
ANSWER
Must be recorded only on the WPS and must be followed by the welder.
During a hydrotest, all joints should be:
2
, ANSWER
Left uninsulated
ASME/ANSI B16.5 requires flanges to be:
ANSWER
Marked with the class rating.
Graphitization of carbon steels begins to occur when metal temperatures exceed:
ANSWER
800°F
During pipe fabrication who has overall responsibility for compliance with the code?
ANSWER
The owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:
ANSWER
3%
Who has the responsibility to determine the extent of PMI (Positive Material Identification)
performed?
ANSWER
The owner/user
A welder becomes unqualified when he has not welded in:
ANSWER
6 months
3
