FW: [Piping Design] Piping for Diluted Sulfuric acid service

From: <Detailed>
Date: Fri May 12 2006 - 00:33:00 EDT

Dear Umesh Ken,

   Piping Specification Engineer,
   Brisbane

U can contact to Mr. M.L. Zalawadia
Of our co. (Tata Chemicals Ltd.

His email address is <a href="/group/PipingDesign/post?postID=RdRbQpcEyUHCcPxeBeJF8bwEybMrHJwpR1Q5cTrgfGPw0LYvrY2UwleOwqJWmKx-nnQOlAa-5jWlbxqhV18ZNRGFsChx3F8">mlzalawadia@tatachemicals.com</a>

Regards

Uday Dave
Detailed Egg. Dept.

Tata chemicals Ltd

Mithapur

India

-----Original Message-----

From: M L Zalawadia
Sent: Friday, May 12, 2006 9:34 AM
To: Detailed Engineering User
Subject: RE: [Piping Design] Piping for Diluted Sulfuric acid service

At present in our chloro caustic plant ,we are using pvc-frv piping for sulphuric acid conc. From 98 % to 92 % at temp. 50 ).

We can defininately rely on PVC-c pipe. But we need to check with pvc-c manufacturer (like Astral in Ahmedabad ) for design concentration & design temp. of sulphuric acid.

Regards ,

M.L.Zalawadia
Soda ash maint. group
Tata chemicals ltd. Mithapur
Pager -578
Mobile no-9426938608
-----Original Message-----

From: Detailed Engineering User
Sent: Friday, May 12, 2006 8:40 AM
To: M L Zalawadia
Subject: FW: [Piping Design] Piping for Diluted Sulfuric acid service

Can they use CPVC FOR Sulfuric acid SERVICE PIPING WITH SPCIAL SUPPORT

REGARDS UDAY DAVE
5309

-----Original Message-----

From: <a href="/group/PipingDesign/post?postID=WG0g4ufrg8t9rw37B3ayIqiLT0ZEoyNFYT24d7fAh6lhfzRXxOBY2SjjFUpM5DXPfDYWfyhLJqlavhByuFPL5v1P_4XjnA">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=WG0g4ufrg8t9rw37B3ayIqiLT0ZEoyNFYT24d7fAh6lhfzRXxOBY2SjjFUpM5DXPfDYWfyhLJqlavhByuFPL5v1P_4XjnA">PipingDesign@yahoogroups.com</a>] On Behalf Of umesh k.n.
Sent: Friday, May 12, 2006 3:36 AM
To: <a href="/group/PipingDesign/post?postID=WG0g4ufrg8t9rw37B3ayIqiLT0ZEoyNFYT24d7fAh6lhfzRXxOBY2SjjFUpM5DXPfDYWfyhLJqlavhByuFPL5v1P_4XjnA">PipingDesign@yahoogroups.com</a> Subject: [PipingDesign] Piping for Diluted Sulfuric acid service

Dear all,

   For Diluted Sulfuric acid we have 3 choices.

1. FRP (Fibre reinforced piping)
2. Duplex stainless Steel (ASTM A790 Gr. S31803)
3. Polypropylene Lined Carbon Steel Piping.

   FRP is complicated design work. (Special supports design, Complicated stress analysis etc)

   PP lined CS piping is easy to design. However we need to use lot of Break flanges, lot of welding, special spool drawings etc.

   Duplex SS piping is expensive. Also weld quality control is headache. (Controlling interpass temperature, backing gas requirement, Impact testing of welds, hardness testing of welds etc)

   Though all looks complicated, my inclination is towards PP lined CS piping.

   Any thoughts....

   Regards.

   Umesh Ken,
   Piping Specification Engineer,
   Brisbane

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