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PostPosted: Sun Oct 15, 2006 9:05 pm
by markfh11q
And you don't have to use a SCH 160 nipple for those caps... 2" NPT is 2" NPT is 2" NPT...

PostPosted: Sun Oct 15, 2006 9:19 pm
by SpudStuff
Alright How bout 500 PSI thats a 5X mix people have done that on PVC hybrids.

PostPosted: Sun Oct 15, 2006 9:53 pm
by Mr.Plow
<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by SpudStuff
[br]Alright How bout 500 PSI thats a 5X mix people have done that on PVC hybrids.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Yeah, go right ahead. Do repeated 5x mixes on a PVC hybrid. See what happens.

PostPosted: Sun Oct 15, 2006 10:07 pm
by SpudStuff
Could u take a co2 cylinder, tap 3/4" threads there the valve was and use that?

PostPosted: Sun Oct 15, 2006 10:49 pm
by SpudStuff
Could I use this for my chamber. It is about 55 Cubic Inches.Ir the equivilent or ~7 inches of 3" pipe.
http://cgi.ebay.com/NEW-UNUSED-1-25-CO2 ... ingPayment

PostPosted: Mon Oct 16, 2006 5:54 am
by markfh11q
<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">
Yeah, go right ahead. Do repeated 5x mixes on a PVC hybrid. See what happens.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Mr. Plow, you do know he's building with metal pressure rated past what a 5x mix produces, right? He was just justifying it by saying that plastic could handle it, (for however short a time).

PostPosted: Mon Oct 16, 2006 7:15 am
by Mr.Plow
<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by markfh11q
[br]<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">
Yeah, go right ahead. Do repeated 5x mixes on a PVC hybrid. See what happens.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Mr. Plow, you do know he's building with metal pressure rated past what a 5x mix produces, right? He was just justifying it by saying that plastic could handle it, (for however short a time).
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Yes mark, I read the topic. Thanks.

PostPosted: Mon Oct 16, 2006 8:45 am
by SpudStuff
A 3/4-14 NTP is larger that 3/4-16 NC right. I can drill it out and tap it?

PostPosted: Mon Oct 16, 2006 10:28 pm
by SpudStuff
Well???

PostPosted: Mon Oct 16, 2006 10:45 pm
by Navigator7
<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by SpudStuff
[br]Well???
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
No.
Burn it out with a sharp torch.
Grind it clean to a 45º angle or better.
Insert the coupling you desire. (Hopefully way bigger than 3/4)
Weld it with one root pass of 6011, two beads of 7018 and a cover pass of 7018.
Pressure test to 1.5 times working pressure with water.
Of course....if the tank is hardened.....forget all of the above!

Don't use a galvanized steel coupling.
Buy only a steel coupling expressly meant for welding.
Don't use a cast iron coupling.

IMHO, you are asking too many banal questions that suggest you don't have the foundation required to reach your goal. Of course there is this tidbit:
<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">I have ~$50 on this project.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

...And a budget too small to deal with 1000 psi applications.

But that is just me......