Micro/Macro Line

[RaV3n_Pa1ntba||]

I am an All-Star Stainless Steel braided hose guy.. but just started liking macro.. where do i get this parker stuff

[Butterfingers]

TUNAMAN has parker paraflex. Its good stuff. I have yellow on my project mag now. I belive it comes in a small variety of colors

[tremis]

I have always been under the impression that working pressure is the rating for which you can constanly use something for a long long time. Just like tanks. You know when they hydro them, they do it 1.5 times the working pressure. I'm pretty sure thats what they said at the APLs high pressure course, but that was 7 years ago. So in that case its not only Ok to overfill, but goverment mandated. Of course after I think 5 hydros, they wont hydro it anymore as the previous hydros have stressed the tank too much. So personally, I would use macro line, and I'd just replace it every so often. Myself, I would just do it at the beginning of every season.

Tremis

[awg9tech]

Yes, when you hydro a tank, one check may be to over fill it. And that may happen up to 5 times in the tanks lifetime (I have not verified this info)If it is true, at 1.5 times working psi, it's not even close to burst psi.
But, when you use micro/macro line on a system that uses ~600-800 working psi, you're "over filling" every single time you charge your marker. So, if the tank info is true (over fill of tanks at hydro/5 time limit on over fill) don't you think you reach the micro/macro line "limit" in an average day of play? If so, how many players change out the macro/micro lines at the end of the day?

[tremis]

I don't think there is a hard and fast rule of 5 times. It has to depend on what material you are over pressurizing. And my personal opinion is that with 3k or 4.5k you dont mess around with it. At 800psi I dont mind. When micro line first came out, a bunch of guys on my team bought some from national. At least twice a day a fitting let loose of the line. No wild hose syndrome, in fact we were able to usually just stick it back in the fitting without turnung off the tank. We eventaully all quit using micro line. It just was too unreliable. And actually burst pressure isn't 4 times working pressure, its the other way around, working pressure is 1/4 burst pressure. They figure out at what PSI it breaks at and multiply that by .25 for continous use. This has been the standard originally used on steel pressure vessels, something inside tells me that some materials can be used at more or less than 1/4 burst pressure. And you dont use your macro line continuosly either. When I was playing the most I ever have, it was still twice a week for 8 or so hours. The rest of the week my gun sat with no pressure in it. That has to factor in its strength also.
I have been meaning to try macro line so I could get the exact lengths I want, but I haven't changed a part on my gun for a couple of years and I just keep putting it off.

Tremis

[steveg]

Trying to draw a parallel between plactic line and a HPA
tank is not really correct. each are assigned working and
maximum pressures for different reasons.
The plactic line can end up in extremely harsh conditions,
submerged in oils,coolants, exposed to acids,abrasives,
corrosives and a whole bunch of other unpleasant enviroments,
and in a lot of cases the lines are constantly being bent and flexed.

running the line at 1/3 ~ 1/4 of its burst pressure is not
a hazard. As stated above, years of successfull use proves
that.


P.S. just looked at the spec sheet for the Dayco nylo-seal
44-NH tube that came with my matrix 625 working and 2500
burst, this tube is rated to carry liquid at this pressure.
Liquid is much harder than air on tubing, because pressure
pulses must be absorbed only by the tube, but air,being
compressable, will absorb some of the pulse. this puts less
stress on the tube. I suspect that an air only rating
would be higher than 625 psi.

[Hexis]

During a hydro test tanks are filled to 5/3 of their normal rated pressure. (5k on a 3k tank, 7.5k on a 4.5k).

Tunaman, does that parker line use normal Macro fittings?

[Thordic]

Also you should look at size. Smaller vessels/tubes/etc are more stable. Did you know that Co2 tanks under 3" in diameter are immune to hydrotesting laws?

The ID of macroline is almost the same as the wall thickness. Thats would be like have 4" thick walls on your HPA tank. (Bad comparison, plastic against alum/CF, but you get the point).

At its tiny size, it is very structurally sound. There is just very little surface area that the pressure could work against.

Think about surface area. Don't even bother with math, just use common sense.

[Tunaman]

Originally posted by Hexis
During a hydro test tanks are filled to 5/3 of their normal rated pressure. (5k on a 3k tank, 7.5k on a 4.5k).

Tunaman, does that parker line use normal Macro fittings?

Yes...The parker line uses standard fittings, but I would not use anything but the ones made in the UK. They are superior. I have tried them all...

[frgood]

New Age Industries

[phish]

Did you know that Co2 tanks under 3" in diameter are immune to hydrotesting laws?

Ahhhh I knew it! Those beligerant(sp?) idiots at pbnation...