API 570 Piping Inspection & Mechanical Integrity Exam Guide: ASME
B31.3 Process Piping Code Compliance, Weld Orientation Stress
Analysis, Circumferential Weld Radiography (RT) Requirements, Pipe
Wall Thickness Tolerances, Soil Resistivity Corrosion Assessment,
Welding Procedure Specification (WPS) and Procedure Qualification
Record (PQR) Essentials, Seamless Pipe Applications in Refinery
Services, Stainless Steel Schedule Identification (40S), Socket Weld
Size Limitations, Pipeline Classification (Class 1 Hazardous Service),
H₂S Sour Service Threshold Criteria, Flange Standards (ASME B16.5)
and Pressure Class Marking, Blind Flange Fabrication Rules, Post Weld
Heat Treatment (PWHT) vs Preheat Requirements, Carbon Steel
Graphitization Temperature Limits, Owner/User Responsibility in
Mechanical Integrity Programs, Positive Material Identification (PMI)
Requirements, Hydrostatic Testing Practices, Radiographic Welding
Qualification Limitations, Welder Qualification Validity Rules, Welding
Position Identification (3G Vertical Groove), Non-Destructive
Examination (NDE) Exam Questions Verified And Provided with
Complete A+ Graded Answers Latest Updated 2026
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on
which weld orientation?
longitudinal weld
,Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service?
10%
for welded pipe, the normal thickness of under-tolerance is?
.010 or 10 mils
The corrosiveness of soils can be determined by measuring the soils:
Resistivity
when qualifying a weld procedure the essential variables must:
be recorded on both the WPS & PQR
In severe refinery services which type of pipe is normally used?
seamless pipe
a pipe has a thickness designation of "40S". what does the "S" mean?
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above:
2 inches
,A propane piping system should be classified as?
Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for:
Blind flanges
Preheat should never be substituted for PWHT if:
the PWHT was used to prevent environmental cracking.
During welding, non-esential variables:
Must be recorded only on the WPS and must be followed by the welder.
During a hydrotest, all joints should be:
left uninsulated
ASME/ANSI B16.5 requires flanges to be:
marked with the class rating.
, Graphitization of carbon steels begins to occur when metal temperatures exceed:
800°F
During pipe fabrication who has overall responsibility for compliance with the code?
The owner/user
Who has the responsibility to determine the extent of PMI (Positive Material Identification)
performed?
The owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:
3%
A welder becomes unqualified when he has not welded in:
6 months
A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness
on the WPS up to.
2T
A pressure test is always required:
B31.3 Process Piping Code Compliance, Weld Orientation Stress
Analysis, Circumferential Weld Radiography (RT) Requirements, Pipe
Wall Thickness Tolerances, Soil Resistivity Corrosion Assessment,
Welding Procedure Specification (WPS) and Procedure Qualification
Record (PQR) Essentials, Seamless Pipe Applications in Refinery
Services, Stainless Steel Schedule Identification (40S), Socket Weld
Size Limitations, Pipeline Classification (Class 1 Hazardous Service),
H₂S Sour Service Threshold Criteria, Flange Standards (ASME B16.5)
and Pressure Class Marking, Blind Flange Fabrication Rules, Post Weld
Heat Treatment (PWHT) vs Preheat Requirements, Carbon Steel
Graphitization Temperature Limits, Owner/User Responsibility in
Mechanical Integrity Programs, Positive Material Identification (PMI)
Requirements, Hydrostatic Testing Practices, Radiographic Welding
Qualification Limitations, Welder Qualification Validity Rules, Welding
Position Identification (3G Vertical Groove), Non-Destructive
Examination (NDE) Exam Questions Verified And Provided with
Complete A+ Graded Answers Latest Updated 2026
Pressure applied inside a pipe creates stress in the pipe wall. These stresses are highest on
which weld orientation?
longitudinal weld
,Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal service?
10%
for welded pipe, the normal thickness of under-tolerance is?
.010 or 10 mils
The corrosiveness of soils can be determined by measuring the soils:
Resistivity
when qualifying a weld procedure the essential variables must:
be recorded on both the WPS & PQR
In severe refinery services which type of pipe is normally used?
seamless pipe
a pipe has a thickness designation of "40S". what does the "S" mean?
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above:
2 inches
,A propane piping system should be classified as?
Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for:
Blind flanges
Preheat should never be substituted for PWHT if:
the PWHT was used to prevent environmental cracking.
During welding, non-esential variables:
Must be recorded only on the WPS and must be followed by the welder.
During a hydrotest, all joints should be:
left uninsulated
ASME/ANSI B16.5 requires flanges to be:
marked with the class rating.
, Graphitization of carbon steels begins to occur when metal temperatures exceed:
800°F
During pipe fabrication who has overall responsibility for compliance with the code?
The owner/user
Who has the responsibility to determine the extent of PMI (Positive Material Identification)
performed?
The owner/user
An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:
3%
A welder becomes unqualified when he has not welded in:
6 months
A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness
on the WPS up to.
2T
A pressure test is always required:
