API 570 Training Course Reading/Study Plan Day 8

Instructions: Read each paragraph referenced below and find the answer for the Text highlighted BLUE. 9 Inspection of Buried Piping

9.1 General In what way is inspection of underground piping different from inspection of

other process piping?

9.2 Types and Methods of Inspection

9.2.1 Above-Grade Visual Surveillance What are indications that a buried piping is leaking?

9.2.2 Close-Interval Potential Survey What can be detected by close-interval potential survey at ground

level?

What does a high potential reading from a close-interval potential survey indicate?

9.2.3 Pipe Coating Holiday Survey

What does a pipe coating holiday survey detect? 9.2.4 Soil Resistivity

What can be determined by a soil resistivity survey?

What does a low soil resistivity level indicate?

Soil resistivity measurements should be performed in accordance with what code?

9.2.5 Cathodic Protection Monitoring

API 570 Training Course Reading/Study Plan Day 8

Inspection of cathodic protection systems should be performed in

accordance with what Code? 9.2.6 Inspection Methods

What are some direct examination techniques for inspecting the condition of buried piping?

9.3 Frequency and Extent of Inspection 9.3.1 Above-Grade Visual Surveillance

How often should the surface conditions on and adjacent to each pipeline path be surveyed?

9.3.2 Close-Interval Potential Survey

When should it be required to excavate buried piping at locations where a pipe-to-soil potential survey detects active corrosion cells?

How often should soil-to-pipe surveys be conducted on poorly coated pipes with inconsistent potential readings?

9.3.3 Pipe Coating Holiday Survey

When are pipe coating holiday surveys normally conducted? 9.3.4 Soil Resistivity

How often should soil corrosivity be measured on cathodically protected piping systems?

How often should soil corrosivity be measured on piping systems not cathodically protected?

9.3.5 Cathodic Protection

What code should be used to determine the inspection interval for buried piping that is cathodically protected?

API 570 Training Course Reading/Study Plan Day 8

9.3.6 External and Internal Inspection Intervals

If a buried section of piping contains a deadleg, what should the inspector take into consideration?

What are the two inspection methods that should be used for buried piping that is not cathodically protected?

When would excavation of cathodically protected piping likely be required?

How much piping should be excavated to inspect suspected corrosion

damage? 9.3.7 Leak Testing Intervals

Can leak testing be used as an alternative to excavation of piping that is not cathodically protected? If so, how often should the leak test be performed and at what pressure?

When a leak test is preformed, how long must the pressure be maintained?

During the 1st 4 hours of a leak test, how much can the test pressure drop?

In the final 4 hours of a leak test, how much can the pressure drop and the test still be acceptable?

A sopl resistivity measurement was found to be 3500 ohm-cm on a buried section of line that is not cathodically protected. What should the inspection interval be on this section of line?

API 570 Training Course Reading/Study Plan Day 8

If the condition of the cathodic protection system on a buried piping system is not evaluated (i.e. using smart pig or pipe-to-soil potential survey), how often should the alternative leak test be performed if the soil resistivity is 3500 ohm-cm?

9.4 Repairs to Buried Piping Systems 9.4.1 Repairs to Coatings SKIP 9.4.2 Clamp Repairs

What records should be maintained for a clamp on a buried section of

line? 9.4.3 Welded Repairs - SKIP

9.5 Records - SKIP ANNEX A

A.1 Examination

What is the API 570 Inspector Certification exam based on?

A.2 Certification

What are the requirements for a person with a BS degree in engineering to be an API certified inspector?

What are the requirements for a person with a two year degree in engineering to be an API certified inspector?

What are the requirements for a person with a high school diploma to be an API certified inspector?

API 570 Training Course Reading/Study Plan Day 8

A.3 Recertification

After being certified as an API 570 Authorized Piping Inspector, how often is

recertification required?

After being certified as an API 570 Authorized Piping Inspector, what could cause an inspector to be recertified?

ANNEX C C.1 Examination

What welding processes can be used for welding repairs?

Can E-6010 electrodes be used to weld the longitudinal seam of a full encirclement sleeve?

What electrodes can be used when welding a full encirclement sleeve made of A-333 Grade 6 material to cover a corroded area when the ambient temperature is 30 deg F?

What is the maximum size electrode can be used to weld the longitudinal seam of a full encirclement sleeve?

Welding procedures used for repairs shall conform to what code?

C.2 Certification & Figure C.2

What is the maximum size electrode that can be used to weld flush patch to repair a corroded area on a A106B piping system?

API 570 Training Course Reading/Study Plan Day 8

What is the minimum radius required on the corners of a flush patch?

What type of repair should be made if the corroded area exceeds the diameter of a NPS 6 pipe?