RE: Re: Condensate line erosion problems

From: <Samuel>
Date: Thu Nov 28 2002 - 09:34:00 EST

Did you mean API RP 576 Inspection of Pressure-Relieving Devices? I'm inetresting in the pipe material selection to protect piping from two-phase erosion. Is there any than SS?

Regards,

Samuel

-----Original Message-----
From: mechengr1977 [mailto:mechengr1977@yahoo.com] Sent: Thursday, November 28, 2002 4:47 AM To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Re: Condensate line erosion problems

not suprising. If youre aware of the API 576 , this could have been avoided. there are a lot of reported incident involving the failure of the piping in the condensate system. Guys from Furmanite, Plidco and Team Inc
makes their living fixing leaks in the condensate piping system. 2 phase flow is mostly what hit us and undersize pipe. What we did is check the vel and pressure drop. piping failing the criteria were marked and inlcuded in the wall thikcness survey. If the metal thinnning is trending up, we are ready/ and prepared and when opportunity comes we implement the fix. can be use using the CRA at elbow, enlarging the pipe, upgrading the trim of the control valve, etc.

• In PipingDesign@y..., "Arif patel" <marif_patel@h...> wrote:
  > Haridas,
  >
  > Can you provide velocity in the header ? The high velocity in
  condensate line may be a cause for erosion.
  >
  > Arif Patel
  > AM Consulting Engg Co.
  > Saudi Arabia
  >
  > ----- Original Message -----
  > From: t_haridas@r...
  > To: PipingDesign@y...
  > Sent: Monday, November 25, 2002 1:00 PM
  > Subject: [PipingDesign] Condensate line erosion problems
  >
  >
  >
  > Hi, Gentlemen,
  > Here Iam calling your attention to corrosion-erosion problem
  noticed in
  > Steam condensate lines in our Refinery / Petrochemical units.
  >
  > Due to the severe erosion problems in Medium and
  High steam
  > condensate lines, the elbows and reducers at d/s
  of CVs are
  > punctured. One typical layout of a Medium pressure
  condensate
  > line CV station is enclosed for reference.
  >
  > The erosion points noticed were :
  >
  > (i) the elbow at the d/s Globe Valve (by-pass line)
  >
  > (ii) the ecc. reducer and elbow at the d/s of CV
  >
  > (iii) the Control Valve trims (316 SS)
  >
  > (Embedded image moved to file: pic26443.pcx)
  >
  > Query :
  > 1) Kindly let us know your expert opinion on above failures
  > 2) Do you have any suggestion / comments on the piping layout
  used for CV
  > stations
  > 3) Remedial actions reqd to avoid such failures in future
  >
  > Best Regards
  > T Haridas
  >
  >
  > [Non-text portions of this message have been removed]
  >
  >
  >
  > Discussion List sponsor: Texas Flange - a good source for
  information on industrial flanges, all they ask is for referrals for designs they help with.
  > 877-610-8924.
  > www.texasflange.com
  > =====================================================
  > unsubscribe: PipingDesign-unsubscribe@y...
  > =====================================================
  >
  >
  > Your use of Yahoo! Groups is subject to the Yahoo! Terms of
  Service.
  >
  >
  >
  > [Non-text portions of this message have been removed]
  

Discussion List sponsor: Texas Flange - a good source for information on industrial flanges, all they ask is for referrals for designs they help with.
877-610-8924.
www.texasflange.com

---

unsubscribe: PipingDesign-unsubscribe@yahoogroups.com

---

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

The information contained in this e-mail is intended only for the individual or entity
to whom it is addressed. Its contents (including any attachments) are confidential and
may contain privileged information. If you are not an intended recipient you must not
use, disclose, disseminate, copy or print its contents. If you receive this e-mail in
error, please notify the sender by reply e-mail and delete and destroy the message. Received on Thu Nov 28 09:34:00 2002