RE: [PipingDesign] Re: Single-Phase Piping Internal E/C Control - ASME Codecase N-480

From: <Samuel>
Date: Mon Jun 02 2003 - 18:08:00 EDT

Thansk a lot, hankl46. Your reply is really what I request.

PS: N-480 was annulled on September 18, 2001, and the latest N-597-1 was approved on September 7, 2001.

Again, Thank you very much,

Samuel

-----Original Message-----
From: hankl46 [mailto:hleveret@aol.com]
Sent: Monday, June 02, 2003 3:50 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Re: Single-Phase Piping Internal E/C Control - ASME Codecase N-480

Background:
Soon after a 1988 nuclear power plant feedwater piping component failed due to flow assisted corrosion, the development of acceptance criteria for locally thinned piping components was started. These criteria were published in Electric Power Research Institute (EPRI) Report NP-5911. This report later became the standard for the evaluation of thinned piping components, which led to the development of ASME Code Case N-480.
N-480 provides examination and analytical evaluation methods for pipe wall thinning due to single-phase erosion and corrosion.

Yes, N-480 is now absolete. I think in 1999, N-480 has been superseded by Case N-597.

---

• In PipingDesign@yahoogroups.com, Samuel Liu <samuel.liu@a...> wrote:
  >
  >
  > Does anyone know any background why ASME annulled code case N-480 on
  > September 18, 2001? (except what said by "No longer needed"). Does
  the
  > method and procedure mentioned in this code case had been replaced
  by
  > others?
  >
  > Best Regards,
  >
  > Samuel
  >
  >
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[Non-text portions of this message have been removed] Received on Mon Jun 02 18:08:00 2003