[MW:0] RE: 0] RE: 5977] RE: 0] RE: 0] MW: 5945- Copper Base alloys

Lube oil coolers for compressors are small – approx 0.5m diameter and 3m long. You do not need to use non-ferrous materials for the shell since it will contain lube oil.

Typically, carbon steel is used for the shell (filters are in the lube oil circuit to remove any corrosion product), the tubesheets, baffles and tie-rods are made of non-ferrous materials, the tubes are integrally finned (SB 359).

If the customer does not want to use carbon steel for the shell, you could propose stainless steel which would be cheaper than a copper alloy.

If your first email had contained the info about the lube oil cooler, it would have kept everyone from guessing.

Ashok

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Praphulla Phirke
Sent: Thursday, July 15, 2010 12:53 AM
To: materials-welding@googlegroups.com
Subject: [MW:0] RE: 5977] RE: 0] RE: 0] MW: 5945- Copper Base alloys

Hi Ashok

Yes I am working on lube oil coolers for compressors .

Thanks

Praphulla

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ashok Raman B Kutty (MNT/PPTSB)
Sent: Wednesday, July 14, 2010 11:48 AM
To: materials-welding@googlegroups.com
Subject: [MW:5977] RE: 0] RE: 0] MW: 5945- Copper Base alloys

Praphulla,

Are you working on a lube oil cooler for a compressor?

Ashok

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Phirke, Praphulla D (GE Oil & Gas)
Sent: Wednesday, July 14, 2010 11:40 AM
To: materials-welding@googlegroups.com
Subject: [MW:0] RE: 0] MW: 5945- Copper Base alloys

Hi Pradip

Thanks a lot for your valuable input.

Answering to your query, there is no specific document issued by customer for material requirements, they have only suggested the materials for coolers as mentioned below during Kick of meeting

Design conditions are also normal like Design pressure is 10.2 Bar G & Design temperature is 90 Deg C. But here I have to provide the cooler with ASME U stamp.

Do you foresee any issue with this?

Thanks

Praphulla

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of pgoswami
Sent: Wednesday, July 14, 2010 7:12 AM
To: materials-welding@googlegroups.com
Subject: [MW:0] MW: 5945- Copper Base alloys

Hi Praphulla,

I looked at the requirements and here is the summary:-

1. Channel, Channel cover & Baffles ASTM B 171 C61400-- Al-6.0-8.0, Fe-1.5-3.5, Balance Cu.

2. Tubes ASTM B-111 C71500— Cupro-Nickel- Ni-29.0-31.0, Fe -0.4-1.0, Balance Cu.

3. Tube sheets ASTM B-171 C71500—As Above

4. Pipes- seamless, copper alloy in nominal pipe sizes, both regular and extra strong--ASME ,SB-315, Alloy C61400

5. Girth flanges, Nozzle flanges- Hot Forged SB 283 C 61900 (Max Fe content 4.0%, clause F of TABLE-1) or SB-283 ,C-62300 or ASTM B 124 C-61900 OR C-62300.

Note for 1,2,3 the identical ASME specification is available as in Sec-II Part-B , SB 171 & SB-111. Same applies for materials 4 & 5. Since the exchanger design is as per ASME , Sec-VIII, DIV-1 , ASME spec ed materials would be preferred over ASTM.

What are the design conditions and specification requirements for materials. Does your client have any guidebook or specifications for operating conditions vs materials requirements?

Thanks

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Ontario Power Generation Inc.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Phirke, Praphulla D (GE Oil & Gas)
Sent: Monday, July 12, 2010 2:38 AM
To: materials-welding@googlegroups.com
Subject: [MW:5945] RE: 5944] RE: 5943] RE: 5941] MW: 5927- Copper Base alloys

Hi Ashok

Process fluid is Shell side Oil VG 220 & Tube side Sea Water....

But customer specifically asked to follow these materials for both sides.

Thanks

Praphulla

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,

pgoswami@quickclic.net

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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