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The difference between sealer and primer?
heat reclaim

Glossary entry

English term or phrase:

1/2H material, "O"

English answer:

1/2H (drawn) 0 (soft annealed)

Added to glossary by Gayle Wallimann
Oct 18, 2004 07:07
19 yrs ago
4 viewers *
English term

1/2H material, "O"

English Tech/Engineering Mechanics / Mech Engineering
air conditioning

[piping - the text is saying that since the refrigerant of this new unit is R410A, while previous unist used R22 (lower pressure) some changes need to be made to circuits/tools used, etc.]



"Refrigerant piping:
Only ö 19.1 is changed to ***1/2H material***
while the previous material is ***"O"***.

...what kind of material is it? and what's the "O"??
Responses
4 +1 1/2 H copper piping

Discussion

Non-ProZ.com Oct 18, 2004:
maybe I found some reference: Copper tube material and thickness
O: Soft (Annealed)
H: Hard (Drawn)

but what about the "1/2" portion?

Responses

+1
16 mins
English term (edited): 1/2h material,
Selected

1/2 H copper piping

I think that you are on the right track.
See the second link for the specifications of refrigeration parts (copper pipes)
1/2 H means drawn, whereas H is hard drawn. O is soft annealed.
Reference:

http://www.inaba-denko.com/eng/products/pipe/nh-khe/nh-khe_siyou.htm

http://www.northeast.com.sg/products/02_copper_pipes_tubes/04_dne_copper.html

Peer comment(s):
agree Tony M : It means 'semi-hard' or 'half-hard' --- I think the difference is between cold-drawn and hot-drawn, though I could be wrong there; but I think 1/2H is standard jargon anyway...
38 mins
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4 KudoZ points awarded for this answer. Comment: "thanks a lot!"
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