Hi,
I hope, the Lube Oil system is required as per API 614 5th edition (Latest edition).
Now, if you refer API 614,
- Para “ 4.5.2.7 : Unless otherwise specified, cooler shells, channels and covers shall be of steel; tube sheets shall be of brass; and tubes shall be of a copper/zinc/tin non-ferrous material, such as UNS C44300 (ASTM B111) (inhibited admiralty).
Shell side is Oil and so, CS is a standard Material used for Shell.
I think, you can ask to LO System sub-supplier and prepare a TQ to Client with all such justification for approval.
My experience, in one of the case we used Sea water and in that case, we used Tubes in Titanium and Tube sheet in CS + Ti cladding on both side (As per Client requirement), Heads with Anodes + Internal coating for resistance to corrosion.
With regards,
Nilesh Darji
CONFIDENTIALITY NOTICE
This e-mail and any attachments there to contain
From:
Sent: Thursday, July 15, 2010 10:48 AM
To:
Subject: [MW:0] RE: 5980] RE: 0] RE: 5977] RE: 0] RE: 0] MW: 5945- Copper Base alloys
Hi Nilesh
Thanks a lot for your reply.
But as I explained in my earlier mail, this is specific requirement from customer and customer has paid us for that.
Let me know if you have any doubt.
Thanks
Praphulla
From:
Sent: Thursday, July 15, 2010 10:27 AM
To: '
Subject: [MW:5980] RE: 0] RE: 5977] RE: 0] RE: 0] MW: 5945- Copper Base alloys
You can also use attached Metallurgy for Oil Cooler.
At present, We are using it for Gulf project.
With regards,
Nilesh Darji
From:
Sent: Thursday, July 15, 2010 9:53 AM
To:
Subject: [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:
Sent: Thursday, July 15, 2010 12:53 AM
To:
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:
Sent: Wednesday, July 14, 2010 11:48 AM
To:
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:
Sent: Wednesday, July 14, 2010 11:40 AM
To:
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:
Sent: Wednesday, July 14, 2010 7:12 AM
To:
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,
From:
Sent: Monday, July 12, 2010 2:38 AM
To:
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:
Sent: Monday, July 12, 2010 12:02 PM
To:
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:
Sent: Monday, July 12, 2010 2:02 PM
To:
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:
Sent: Monday, July 12, 2010 4:37 AM
To:
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:
Sent: Saturday, July 10, 2010 3:13 AM
To:
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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