PDA

View Full Version : What kinf of pipes are used for coldstores ?







eng_ab
05-02-2005, 04:00 PM
Hi guys;

Please can u tell me what kind of pipes r commonly used in coldstores ? and what standard sizes r used ?

chemi-cool
05-02-2005, 05:47 PM
Pipes for what in a cold store, water?, refrigerants?
Be more specific, please.

Chemi :)

chillyhamster
05-02-2005, 06:48 PM
round ones

Peter_1
05-02-2005, 07:07 PM
We mostly uses spiral duct for R404a and flexible duct (isolated of course) for R134a.
Till 2 kW you need a duct of 5 inch, from then 8 inch.
If used for freezer application, isolate the duct very good.
A good tip, you can use the inner side of the duct as a cable tray, fits all inside it and it's good looking.
Use a good quality duct-tape, especially with R404a because that gas becomes real cold. :confused: :D

Brian_UK
05-02-2005, 11:48 PM
...snip...Use a good quality duct-tape, especially with R404a because that gas becomes real cold. :confused: :D
LOL Peter, you test my rib cage :D :D

coolkev
06-02-2005, 12:24 AM
:cool: generally copper exept for R717 with is steel. Either hard or soft drawn depending on size and application. Soft usually only availible up to 7/8". although over 5/8" is a pain to work.The pipe must be ref. grade which is clean, dehydrated and always capped both ends Standard sizes 1/8", 3/16",1/4",3/8",1/2",5/8",some 3/4",7/8",1 1/8", 1 3/8", 1 5/8".These are most commen, there is of course bigger but im not very familar with these, one of the industrial techs or larger A/C boys will know these I havent done multi storey work since 1989 Dont be put of by the sarcasam of others, bit of a fridgey trait.

eng_ab
06-02-2005, 10:04 AM
Appreciate ur help guys, especially coolkev. What about pipes used for ammonia and R22 ? Do u know good pipe manufacturers ? What good certificates are generally achieved to make the manufactured pipe approved from most coldstores ?

rbartlett
06-02-2005, 11:26 AM
ammonia will be steel
R22 is copper only

standards for refrigerant quailty pipe are

ASTM B 280 and EN 12735-1

http://www.metalagencies.com/copper_alloy_tubes.htm

best bet is to employ us as consultants to oversee the project.

cheers

richard

eng_ab
06-02-2005, 12:02 PM
Thanx 4 ur help rbartlett.
Do u work in metalagencies or u do consulting individually ?

rbartlett
06-02-2005, 12:43 PM
check our website

http://www.fridgetech.com

cheers

richard

eng_ab
06-02-2005, 01:10 PM
richard, did fridgetech handled some projects in the middle east ?
I am impressed by ur customers. Especially the cafebar, that was neat. Where is the location of this cafebar ? Maybe one day i can visit it :D.

rbartlett
06-02-2005, 03:57 PM
As yet we haven't handled any middle east projects as Fridgetech (although personally I have in my previous company in Saudi btw.)

However fridgetech has had experience in Nigeria for Mobil and Daewoo

Check the bottom of this page...

http://fridgetech.com/subcontracting/


The cafe bar was a project in hinckley ;-)

http://www.hinckley-online.co.uk/about_h.shtml


Cheers

Richard

eng_ab
06-02-2005, 04:12 PM
Cool :) where did u work at saudi arabia ?

eng_ab
06-02-2005, 05:24 PM
When speaking of steel pipe used for R717. Do u refer to carbon steel or something different ?

rbartlett
07-02-2005, 06:30 PM
Cool :) where did u work at saudi arabia ?


On the Prince Sultan Air Base
Al-Kharj

cheers

richard