From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ashok Raman B Kutty (MNT/PPTSB)
Sent: Monday, July 12, 2010 12:02 PM
To: materials-welding@googlegroups.com
Subject: [MW:5944] RE: 5943] RE: 5941] MW: 5927- Copper Base alloys
Praphulla,
Some info, related to but not specific to your question ---
Sea water is generally placed on the tube side of a floating head exchanger with HDPE inserts at the tube inlet ends to prevent erosion. In these cases, the tubes are made of non-ferrous material like aluminium brass, tubesheets of Al Ni bronze.
What is the process fluid?
Ashok
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Phirke, Praphulla D (GE Oil & Gas)
Sent: Monday, July 12, 2010 2:02 PM
To: materials-welding@googlegroups.com
Subject: [MW:5943] RE: 5941] MW: 5927- Copper Base alloys
Hi Pradip
Since I am dealing with these materials 1st time.. I need some more help from you.
Can you please suggest me the material of construction for the rest of the components of the heat exchanger?
Right now I am going ahead for Shell, Channel, Channel cover & Baffles as ASTM B 171 C61400 , Tubes ASTM B-111 C71500 , Tubesheets ASTM B-171 C71500
But for girth flanges, nozzle flanges which material is best one since its going to be welded to ASTM B 171 C61400? Can you please help me?
Thanks
Praphulla
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pgoswami
Sent: Monday, July 12, 2010 4:37 AM
To: materials-welding@googlegroups.com
Subject: [MW:5941] MW: 5927- Copper Base alloys
Praphulla,
General composition of both the alloys are as follows.For sea water applications both the alloys are popular.Alloy C-63000(Ni-Al bronze) is an alloy with higher strength which could be attractive from design point of view and would be costlier than the other variety.
You may find the attached booklet as good information to start with.
Bronze alloys are common cost effective choices in sea water applications, many times as castings. However if heat exchangers are to be fabricated entirely from this alloy, it would involve good fabrication practices.
Thanks.
Pradip Goswami,P.Eng.
Welding & Metallurgical Engineer/Specialist
Ontario Power Generation Inc.
Email-pgoswami@sympatico.ca,
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Phirke, Praphulla D (GE Oil & Gas)
Sent: Saturday, July 10, 2010 3:13 AM
To: materials-welding@googlegroups.com
Subject: [MW:5927] Copper Base alloys
Importance: High
Dear all,
For one of my project, I have to use Sea water for cooling purpose.
For the same customer has suggested following materials for heat exchanger
Shell, Channel, Channel cover & Baffles as ASTM B 171 C61400 or ASTM B 171 C63000
I never used such type of materials earlier.
Can anyone suggest me which option is best option & why?
Also let me know which is costlier ?
Thanks
Praphulla
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