On Saturday 02 January 2010, Kirk Wallace wrote:
>On Sun, 2010-01-03 at 01:20 +0000, Steve Blackmore wrote:
>> On Sat, 2 Jan 2010 11:04:29 -0800, you wrote:
>
>... snip
>
>> >Chinese valves freeze and crack. This is because of voids and porosity
>> > of the castings.
>>
>> Dezincification failures are a big problem with cheap fittings
>> especially if they have been in use for some time in acidic water, and
>> it's not just a Chinese thing. I've seen it on European and USA made
>> fittings. The "American" fittings are probably DZR Brass, the Chinese
>> are probably any old recycled Brass, likely the shavings Matt was
>> talking about :)
>>
>> Good quality brass fittings are made from CZ132 Brass, which needs heat
>> treating to 500C or so after forging to resist dezincification.
>>
>> You can buy good Chinese fittings, just as you can buy bad American
>> ones. If you do suffer from dezincification buying from a good plumbers
>> supply shop or marine chandlers is a safer bet, you'll pay more, but
>> they should be able to supply decent fitting that will last a lifetime.
>>
>> Steve Blackmore
>
>Thanks for the information Steve. Google also linked:
>http://www.hghouston.com/coppers/brass75.htm
>http://en.wikipedia.org/wiki/Brass
>http://en.wikipedia.org/wiki/DZR
>
>among other good links. I'm going to need a bigger head to fit some of
>this in.
Well, we could be like Garfield and claim the overflow is in our stomach. ;-P
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Linux: the operating system with a CLUE... Command Line User Environment.
-- seen in a posting in comp.software.testing
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