Re: Flange Bolts material substitution-Query.

OK. A307 is allowed in B16.5 within the prescribed limits. But is A307 a listed bolting material under B31.3? If not, then case is closed.

• In PipingDesign@yahoogroups.com, Sajit Viswan <sxviswan@y...> wrote:
  > Marking norms followed by companies require the studs and nuts to
  be cold stamped with the material grade and sometimes the makers identification.
  >
  > "Sare, Ralph H." <SARERH@Y...> wrote:The use of A307 is indeed
  allowed in ASME B16.5-2003 up to class 300. But
  > Note 12 of Table 1B and 5.3 has additional restrictions in its
  use. OK lets
  > consider that the application is in petrochem where a flange with
  a class
  > rating of 300 normally exceed 200degC. The use of A193 and A307
  was allowed.
  > Remember now theres a restriction for A307 and almost none for
  A193.
  >
  > The plant was commissioned. Factor in the chances of mixing up
  A193 with
  > A307. Can anyone imagine now the horror facing the Prodcution,
  Safety and
  > Maintenance people in a very near future? Lets compound the
  problem.
  > Consider that some of the flanges in class 300 are carrying highly
  hazardous
  > chemicals. The risk factor now is spiranling upward. I can cite
  few more but
  > let us stop here. Reason enough for us just to maintain the use of
  one spec
  > bolt for flange joint and our preference for A193.
  >
  >
  >
  >
  > [Non-text portions of this message have been removed]
  >
  >
  >
  > =========================================
  > 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>
  >
  >
  >
  >
  > SPONSORED LINKS
  > Online mechanical engineering degree Process piping Mechanical
  engineering Mechanical engineering class Mechanical engineering college Mechanical engineering degree
  >
  > ---------------------------------
  > 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=Sckti-SIVb75ZNRvd80b38BzI_RtVdR0dYjl3gPtOWZqD4VB-ztEwC7o80mALxC4YhxNzIcoq_TonPo_k6G7NMsMx-yubWUE9pyvQGfKXOw">PipingDesign-unsubscribe@yahoogroups.com</a>
  >
  > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
  Service.
  >
  >
  > ---------------------------------
  >
  >
  >
  >
  >
  > ---------------------------------
  > How much free photo storage do you get? Store your holiday snaps
  for FREE with Yahoo! Photos. Get Yahoo! Photos
  >
  > [Non-text portions of this message have been removed]