API 579 FFS Using INSPECT Webinar and Q&A

View FFS Using INSPECT Webinar Recording
B31.4 is on our development list and we anticipate it being released this year.
Not currently. Miters have been discussed and will likely be added in at a later time.
This really falls to the experience of the operators of the plant. It should also be documented in the origin design documents as well.
General metal loss is the most conservative approach so engineers often make that assumption to simplify the analysis.
The Critical Thickness Profile grid is an input into the API-579 FFS analysis. The INSPECT user enters this data, usually gathered by an inspector, into the appropriate dialog.
With INSPECT you get all the same functionality as you do with COMPRESS. So if you are currently running INSPECT that is all you will need.
The API-579 does not list out recommended repairs. Rather the analysis performed will inform the user if the equipment is fit to continue in service. If not, the owner of the equipment typically investigates various options.

  1. Drop the operating pressure and or pressure (derate, INSPECT does this)
  2. Repair (will depend on the damage mechanism and schedule)
  3. Replace
If a Charpy impact test was performed you can edit the component and check the box “Impacted Tested”. You can then enter in what temperature the test was performed at.
The API 1104 deals with “Welding of Pipelines and Related Facilities”. It does not address FFS in this document nor does the API-579 reference this document.
We’re not entirely sure what you asking. Please feel free to contact us to clarify this further.
INSPECT currently includes FFS for straight B31.3 pipe (spools). Later this year we will be extending INSPECT’s piping capabilities to include pipelines. Coverage of B31.3, B31.4, API-579 and API-570 will be available.
Thermal loads can be entered in the supplemental loads dialog.
No. In INSPECT you can model simple components having one or more damage mechanisms. Unlike others, INSPECT (and COMPRESS) do not require you to learn and use two different programs to handle both situations.
The sketch was taken from Appendix 1-10. When we were looking at this example we were also running the Appendix 1-10 rules to see if it would pass (it did).
Not currently but it has been discussed and may be implemented at a later time. API 653 is scheduled for inclusion later this year.
The API-579 itself does not address the different types of welds in Parts 3, 4, 5, and 6. The joint efficiencies would be the only item that the API-579 analysis would be concerned with.
INSPECT does not handle crack-like flaws. When required, we suggest consulting with a firm that specializes in this field. A couple of things to keep in mind about cracks:

  1. Accurately describing the damage mechanism geometry in an FEA model is often challenging
  2. The FEA practitioner must be well versed in the application of FEA to Code vessels ( ASME VIII-2, Part 5)
  3. Turn around (TAR) time constraints may not permit it.
  4. Cost, as the analysis may end up turning into an Engineering study.
  5. Most importantly, The National Board does not allow equipment to be operated with cracks.
Not currently. Parts 3,4,5, and 6 are covered in INSPECT.
To physically accomplish this a charpy impact test would need to be performed.
Boiler tubes subject to creep are not covered by INSPECT and require special consideration.
Vessels are modeled one per document window (Division 1). INSPECT has a project feature that allows all related equipment, say from one corrosion loop, to be associated together. INSPECT can then run reports on the entire loop. See this video tutorial for more details:


Yes. It is Codeware’s policy to update our software to the latest Codes and Standards as they become available. INSPECT is currently using the latest versions of API-510 and API-579.