API 570 Problem Children

What is a cause for fatigue cracking?

REPAIRS - Number of new flange assemblies to be inspected during repairs and alterations?

INSP - Basis of API 570 piping classifications?

CORROSION - Method by which process leaks can lead to brittle fracture?

NDE - CMLs that must be measure during a thickness inspection?

CORROSION - Type of soil that is most corrosive?

Flanges - When mating flanges, the maximum amount of unparallel allowed (per diameter of flange in feet)?

FLANGES - Max offset for bolt-holes for mating flanges?

NDE - Suggested diameter of a CML exam point?

PREHEAT ZONE - Distance from the start of the weld?

PWHT ZONE - Minimum width of band?

CORROSION - Soil to air distance in the air from the interface?

CORROSION - Distance to dig when inspecting for soil to air corrosion?

CORROSION - Soil to air area distance in soil from the interface?

NDE - Minimum upstream limit of intensive examination of injection point circuit?

PWHT - Minimum overlap for PWHT when using multiple heats?

WELD QUALIFY - Minimum weld length when qualifying a welding operator with RT/UT of the first production weld?

UNDERGROUND - Minimum length of buried pipe to expose when excavating for inspection?

REPAIRS - Maximum size of fillet weld patch on pipe?

CIRCUITS - Minimum upstream limit of injection point circuit?

NDE - Minimum downstream limit of intensive examination of injection point circuit?

CIRCUITS - Minimum downstream limit of injection point circuit?

Subject to chloride stress-corrosion cracking?

Subject to polytheonic acid stress-corrosion cracking?

Testing - Minimum flash point of hydrocarbons used for leak testing?

Corrosion - Temperature where chloride stress corrosion cracking becomes a concern?

Inspection - Operating temperature when a corrosion specialist must input on an inspection plan?

NDE - Maximum temperature for UT readings per API 574 using special delay lines and water cooled transducer?

Flanges - Minimum thread engagement acceptance criteria per 570?

Flanges - Minimum thread engagement acceptance criteria per B31.3

Ratio of endurance limit stress to ultimate tensile stress for carbon steel?

Interval - Suggested interval for above-grade visual surveillance of buried pipe?

Insp - Suggested interval for close-interval potential survey of buried pipe with poor cp?

When should temporary and non-welded repairs be repaired/replaced?

NDE - Pipe sizes can use Profile RT to find localized corrosion?

Pipe size where pipe is almost always made using rolled and welded plate?

Test - Maximum stress allowed during a pressure test?

Test - pH of water needed to reduce likelihood of MIC (bugs)?

Test - Pressure to perform inspection during a pressure test of pipe that has been in service?

Corrosion - Typical external corrosion rate for  a dry rural area?

Corrosion - Typical external corrosion rate for inland locations with moderate rain and humidity?

Corrosion - Possible external corrosion rate for industrial environments with acid or sulfur compounds?

Corrosion - Possible external corrosion for marine locations/

Welding - Meaning of the 1st two digits in the electrode designation for a SMAW electrode?

Welding - Meaning of "S" in the electrode designation for a GMAW or GTAW electrode?

NDE - Minimum overlay with a UT scan, % of transducer diameter?

Testing - Minimum pneumatic test pressure, % of design pressure?

Testing - MInimum test pressure for underground pipe, % of maximum operating pressure. Test in lieu of digging

Valves that should be inspected for thermal fatigue?

Where dew point corrosion often occurs?

Document that owner/user must have that is following API 570?

Document required when owner audits inspection program?

Document required for each piping system?

DOcument required for each PRD repair organization?