RE: pressure test thoughts

From: <Venkat>
Date: Sun Sep 11 2005 - 06:47:00 EDT

It is the maximum operating pressure.

API 570 Para 8.2.6 refers to code 31.3 for pressure testing or if not practical allows to have full NDT in lieu of Hydrotesting.

Our concern was .

Present thickness satisfies the new deign pressure condtion but does not satisfy the new hydrostatic test pressure of 1,5 X new design pressure as per ANSI 31.3 para 345.4.2(a).

We have pneumatically tested the piping and found OK.

"Sare, Ralph H." <SARERH@YANPET.SABIC.com> wrote: Venkat wrote.

What if an existing piping is rerated to a higher pressure and the available pipe thickness just satisfies the new operating pressure, Is the 1.5xtimes test pressure is mandatory in this case?

---

You mean the new DESIGN pressure and not the OPERATING pressure? Because generally Rerating deals with most severe condition. For pressure testing of piping already in service, consider 1.2.1(included fluid services), 8.2.6 (pressure testing) and 8.3 (rerating) of API 570.

---

PipingOffice - Excel Spreadsheets for Piping Calculations <a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>

---

Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>

---

YAHOO! GROUPS LINKS      Visit your group "PipingDesign" on the web.

     To unsubscribe from this group, send an email to:   <a href="/group/PipingDesign/post?postID=5JDOnd0TlsL_4wgnbSmKaq1UfMtInKg4TkCq6gxOZVKEb1W__rxbCVMD-juroDWXUXTlRNKpodfFMB2VBkfGo2sVZfKuqFTFH53d_eOR">PipingDesign-unsubscribe@yahoogroups.com</a>

     Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

---

---

  Yahoo! India Matrimony: Find your partner now.

[Non-text portions of this message have been removed] Received on Sun Sep 11 06:47:00 2005