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pcp question for experts
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Author:  pabirdman [ Thu Aug 14, 2014 9:21 pm ]
Post subject:  pcp question for experts

picked these up at a auction.Had an idea they might be useful but I don't play much with high power stuff.Can someone give me insight?

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Author:  rsterne [ Thu Aug 14, 2014 10:09 pm ]
Post subject:  Re: pcp question for experts

I don't know what the Hydro date is, but it looks like the manufacturing date is June of 2001, so with a 15 year tank life, that means it won't be fillable after 2016....

Bob

Author:  pabirdman [ Thu Aug 14, 2014 10:33 pm ]
Post subject:  Re: pcp question for experts

Are they convertible to hold just co2?If good until 2016,what do you think they are worth?

Author:  Whitewolf [ Thu Aug 14, 2014 11:33 pm ]
Post subject:  Re: pcp question for experts

Have not heard of one useing a hpa cf tank for co2. Not sure as to how its design would work for cryogenic liquids. As for price maybe $80 -$100. Kinda expensive 16 months. IMHO

Author:  blarg [ Thu Aug 14, 2014 11:59 pm ]
Post subject:  Re: pcp question for experts

I got a hydrotest quote for 25/tank locally - worth a phone call.
Not sure what policy is if a shop sees a freshly passed tank at 15 years.

Author:  Gippeto [ Fri Aug 15, 2014 7:02 am ]
Post subject:  Re: pcp question for experts

blarg wrote:
I got a hydrotest quote for 25/tank locally - worth a phone call.
Not sure what policy is if a shop sees a freshly passed tank at 15 years.


IMO any shop that hydro's an out of date tank is stealing your money....fresh hydro or not, no one will fill them after the 15 year span.

Author:  Daryl [ Fri Aug 15, 2014 9:23 am ]
Post subject:  Re: pcp question for experts

Al - not sure I understand, does that mean scuba tanks just keep going on and an with hydro testing, but carbon tanks simply die at the end of 15 years?

Author:  GerardSamija [ Fri Aug 15, 2014 11:28 am ]
Post subject:  Re: pcp question for experts

The epoxy is not known for very long life. The carbon fibres are probably fine for a LOT longer than that, but the epoxy used to bind it all together is the weak link. I don't feel comfortable with the idea of a carbon fibre tank, just too inconsistent a material (at least potentially, depending on the skills of the person constructing the stuff) compared to metals. Seems to me though that pushing such a tank beyond the spec'd limit or using a gas in it for which it was not intended, especially CO2 which is known to skyrocket in pressure on hot days, is a recipe for disaster. That's basically a bomb waiting to go off. Or could be. Want to take that chance?

Author:  Gippeto [ Fri Aug 15, 2014 1:04 pm ]
Post subject:  Re: pcp question for experts

Daryl wrote:
Al - not sure I understand, does that mean scuba tanks just keep going on and an with hydro testing, but carbon tanks simply die at the end of 15 years?


Metal tanks can go on and on providing they keep passing visual and hydro testing. The "glass" tanks have (for the most part) a rated 15 year life span after which they are supposed to be destroyed such as to prevent further use. Common method is to drain the tank and drill a hole in it.

There are some tanks now that have a 30 year rating but I've never seen one and would likely be startled by the cost. :wink:

Al

Author:  Daryl [ Fri Aug 15, 2014 1:32 pm ]
Post subject:  Re: pcp question for experts

TKS Al - as I suspected. That 30 year tank would do me until age 94 1/2. :roll: Maybe worth it if only double the cost of a 15 year tank?

Author:  blarg [ Fri Aug 15, 2014 7:00 pm ]
Post subject:  Re: pcp question for experts

Presumably the tanks in question were firefighter decommissioned gear.
I'm gonna guess they are made with the heat they may encounter in mind as part of design life.
Some homework might expose what shelf life they do actually have, or if a freshly passed 4.5k hydrotest might make them worthy of derated home pressurization a la shoebox or other means.

Author:  pabirdman [ Sat Aug 16, 2014 11:28 am ]
Post subject:  Re: pcp question for experts

yes they were firefighter tanks

Author:  Daryl [ Sat Aug 16, 2014 4:16 pm ]
Post subject:  Re: pcp question for experts

Of course, the next question is EXACTLY what fill station would be needed for a rifle with it's own gauge? How much??

Author:  Whitewolf [ Sun Aug 17, 2014 9:09 pm ]
Post subject:  Re: pcp question for experts

Most SCBAs require a DIN 200 female fitting. Cost factor around $200 with exchange, taxes, shipping from http://www.airtanksforsale.com. pricey for short service life if used with the named tank above.

Author:  Knappr [ Wed Sep 03, 2014 5:36 pm ]
Post subject:  Re: pcp question for experts

I use carbon fibre scoot air tanks myself and purchased my hose system from SSSO for around $140 shipped to Ontario, lucky for me I have some close buddies in the fire fighting world. Free air is great air! Well it costs me a beer here and there

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