• March 2, 2021
    1:00 pm - 4:15 pm
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Bill Amend will Present ERW Pipe: History, Metallurgy and Integrity Management Issues as a webinar on March 2, 2021, at 1 p.m. CST
This training has the minimum required to hold the class. Further information to be provided upon registration.

This course is built from excerpts taken from multiple other webinars, including Introduction to Pipeline Steels, Pipeline Flaws and Degradation, In-situ Determination of Pipe Properties, and Vintage Pipe, but the focus is entirely on ERW pipe, plus, additional details not covered in the other webinars are also included in this webinar.  If your pipeline system includes significant mileage of ERW pipe or you have any role in the procurement, inspection and/or integrity management of ERW pipe this is the webinar you need.  The covered topics will include the following:

  • How is ERW made? Historical and modern processes
  • Identifying ERW in the field (seamless v. ERW, finding the fusion line, unique visible features)
  • Measuring the properties of ERW seams in the lab (destructively) and in the field (nondestructively). Evaluating MTRs for ERW.
  • ERW manufacturing flaws; How to find them and assessing the significance of detected flaws.  Historical safety performance of ERW
  • Repair options for ERW seams
  • Comparing manufacturing standards applicable to ERW (API PSL 1 and PSL 2, ASTM)
  • What the federal pipeline safety regs say specifically about ERW
  • Reports and other resources for understanding ERW pipe integrity issues and typical ERW properties


Course Notes with Self-Assessment Quiz
Certificate of Completion Awarding 3 PDHs


This webinar receives a 5-star our 5 stars rating!
“Excellent presentation!”
“Bill was great.”
“This was a great webinar, packed with both historical and modern information.”

Self-Assessment Quiz

  1. Describe three methods of transferring electrical energy to the seam edges for welding.
  2. When did ERW first appear as an acceptable manufacturing method in API 5L?
  3. When was NDT first included as a requirement for seam inspection by API standards?
  4. What was the typical range of hydrotest stress for early ERW pipe at the mill?
  5. Describe the two common heat treatment variants for ERW seams and which one is preferred.
  6. How does the use of center-slit skelp affect the appearance of the microstructure in cross sectional view?
  7. Which method (NDT or hydrotest) is more effective at finding small flaws in brittle seams? Why?
  8. Describe at least three differences between the requirements for API 5l PSL 1 and PSL 2 pipe
  9. Describe at least two differences between ASTM A53 ERW grade B pipe and API 5L PSL 2 grade B pipe
  10. Assume that brittle fracture initiation and/or crack arrest is a concern for the intended service for new grade B pipe. Why is ASTM A53 not a good specification to use for purchase?
  11. Which form of seam manufacturing is most susceptible to “stiched” welds: DC-ERW, LF-ERW, HF-ERW
  12. Describe two sources (unrelated to corrosion) that can contribute to wall thickness variations at the seam.
  13. Relative to the location of the fusion line, where are hook cracks typically found?
  14. What flaw is most likely to grow by fatigue?
  15. What are the commonly cited default toughness values for LF and DC ERW seams applicable to assessment of 1) hook cracks and 2) fusion line flaws?
  16. What feature of some ERW seams may make it unacceptable for use in sour service or for hydrogen pipeline service?
  17. What pressure capacity assessment options are recommended for evaluation of corrosion on LF-ERW seams?
  18. A midwall void is found on one side of the fusion line. What is the probable cause?
  19. What two factors contribute the most to selective seam corrosion?
  20. Describe two common limitations applicable to grinding on ERW seams
  21. Summarize at least two ways of determining if pipe is seamless or ERW.
  22. What distinctive shape does the HAZ of a HF-ERW seam have when viewed in cross section?
  23. Name two hardness test options or methods that are preferred for testing ERW seams
  24. What surface feature should be considered when making hardness tests or chemical analysis tests on the pipe surface?
  25. When estimating seam properties, what is the potential disadvantage or limitation of making measurements from the OD surface?
  26. Describe one easy and inexpensive destructive test for evaluating seam ductility and exposing seam flaws in which the only required measurement can be done with a tape measure
  27. Name at least three non-destructive measurements commonly used as inputs to algorithms that estimate pipe and seam properties.

Instructor Bio

Bill Amend, P.E
Principal Engineer, DNV GL
Pipeline Integrity, Metallurgical Engineering, Materials Selection, Welding Engineer

Bill Amend has 41 years of experience performing pipeline integrity management, failure analysis, metallurgical engineering, and welding engineering services. His background includes 26 years working for pipeline operators (Unocal and Southern California Gas Co.)  before working for engineering services providers. He is currently Principal Engineer at DNV GL. He is a co-author of the ASME report CRTD Vol. 91 regarding field measurement of hardness to determine the lower bound yield strength of pipe and has managed and conducted various research projects for ASME, DNV GL, NYSEARCH and PRCI addressing the continued development and validation of methods for nondestructive determination of pipe properties, chemical analysis of steel, tensile testing, and characteristics of early vintage pipeline girth welds.  He is a registered professional Metallurgical Engineer in California and graduated from California Polytechnic State University in San Luis Obispo (Cal Poly SLO).



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