HP Hose Failure

[iain/hsm]

Our friend should know. He knows everything and criticises everything.

You really can't stop can you. Well at least we all now know your place in the list

"Perception is for the misguided, the foolish and the idiot."

With the first two in the list taken up already.

 

[Eric Sedletzky]

Ok, so buying hoses that say "Made in USA" and also have "EN250" marked on the same hose are junk? Because I have several that have both on the same hose.
So we can't go by "made in USA" anymore I take it?
I'm just trying to understand what needs to be marked on the hose so I know it's not junk.
I looked at all my hoses, and none of them have SAE100R3 on them.
If I call somewhere and ask if their LP and HP hoses are up to SAE100R3 standards are they going to know what I'm talking about?
Just tell us!
...and please stop with the long talk and the irrelevant list of credentials, I'm sure you're very qualified and know a lot about the industry inside and out. That's great but I don't care, I just want to know about hoses and what I need to look for that's STAMPED ON THE HOSE.

 

[BoltSnap]

You really can't stop can you. Well at least we all now know your place in the list

"Perception is for the misguided, the foolish and the idiot."

With the first two in the list taken up already.

Thank you for proving my point. You are probably the rudest person on SB I have seen in a long time.

 

[iain/hsm]

Someone please tell me if I am wrong. I understood that European standards (EN250 being one) was to facilitate trade within the EU. It is as far as I know a minimum standard

No your absolutely correct good point a minimum standard.

EN250 states regarding the intermediate and HP hose this simplistic requirement:

"A hose can also be marked with the maximum working pressure of that particular
type of hose, EN250 and can also include a serial number specific to that hose".

That allowed the toilet hose company Miflex in Italy to produce on mass together with China Taiwan et al
the overpriced made for profit junk to minimum standards.

Now compare the same 150 psi hose maximum working pressure with that of the older SAE standard that although working at the same 150psi pressure the old specification had a maximum allowable working pressure of 1250 psi together with a burst pressure of 5000 psi. This gives a safety margin of 4:1 Four time the maximum allowable working pressure before burst. More than the full working pressure of the cylinder.

This principle was applied and incorporated into a design some years ago that I was involved in for a Helicopter Emergency Escape Device a HEED system. We produced a design that used no user or manufacturing adjustment in either the first or the second stage and at the same internal parts were identical for both the demand valve and the pressure regulator using two identical pressure modules.

The design was tested at the ANSTI test centre and passed to 30msw 100 FSW as required with a reduced interstage pressure of 4 bar 58 psi rather than the normal 150 psi. The intermediate hose was a micropore high pressure hose that in the event of a 1st stage failure the second stage would be able to control the bottle pressure and still operate during an egress. The size of the cylinder was however too small to sustain life for long at the 100FSW test depth but the principle of design was proven to work at the required average 12 foot depth, the assumed emergency egress condition.

Now EN250 the latest European adopted standard killed that particular and unique design dead.

 

[DANDM]

So... Should I stop buying my hoses from AliExpress?!

 

[iain/hsm]

So... Should I stop buying my hoses from AliExpress?!

Heck if you did that I would have nothing to complain about and would have to be nice to folk apparently

 

[iain/hsm]

Thank you for proving my point. You are probably the rudest person on SB I have seen in a long time.

Let's agree for the sake of clarity to remove "probably"

 

[iain/hsm]

Ok, so buying hoses that say "Made in USA" and also have "EN250" marked on the same hose are junk? Because I have several that have both on the same hose.
So we can't go by "made in USA" anymore I take it?
I'm just trying to understand what needs to be marked on the hose so I know it's not junk.
I looked at all my hoses, and none of them have SAE100R3 on them.
If I call somewhere and ask if their LP and HP hoses are up to SAE100R3 standards are they going to know what I'm talking about?
Just tell us!
...and please stop with the long talk and the irrelevant list of credentials, I'm sure you're very qualified and know a lot about the industry inside and out. That's great but I don't care, I just want to know about hoses and what I need to look for that's STAMPED ON THE HOSE.

No not necessarily you can under this crazy sub standard EN rule for the hose do the following:
1. Use proper SAE100R3 specification hose
2. And still print Made in America on it if it is indeed made in America and not just the hose ends added
3. But you still have to print EN250 and a working pressure of your choice.

My point is SAE is an extremely good American standard in the first place for the reasons I gave and explained earlier.

EN250 by contrast is nothing like up to the same standard. You print the working pressure on your toilet water pipe hose and the words EN250 and you're done.

And you the end user have no idea what your using or breathing from and any wonder your now told to change the hose every how many years Oh yes its now a consumable replaceable product for your safety.

 

[BRT]

I'm new to this sport. I only started in 1969 using a healthways regulator. I've been an instructor since just after the turn of the century. I've worked in shops, rebuilt more regulators than I could care to count, and have replaced more than my share of hoses. I'm sure that pales in comparison to your experience.


It's not meant to be. It's almost entirely ego driven and relies on fear mongering. They think they know better, but somehow can't be bothered to clue you in their "secret sauce". Some feel that dissing products elevates their standing in the eyes of others. Maybe some are gullible enough to think they are on to something, but there just any substance to their cries of alarm. In the end, the gear produced today is far superior than when I first started diving... even the hoses. Plan on replacing your hoses from time to time. Look for checking in the outer cover, and chuck those that show signs of deterioration. Most diving destinations have hoses available should one decide to fail on a dive. If a hose does start to fizz, check your air and call the dive. If it's a really big leak, like an o-ring failure, kink the hose if possible and call the dive. It can be quite an exciting experience, but in over 50 years of diving, I can't think of a single injury, much less death attributed to a failed hose.

And please, many leaky hoses look just like good hoses. Make a habit of cutting leakers into two pieces. Snip, snip. That will stop anyone from accidentally reusing it.

No you are not an instructor.

 

[happy-diver]

Yeah with no ability to listen quietly gleaning the required information to do further research to provide a solution

But no just the standard grasping for information that you ain't going to comprehend or do anything with anyway

Well it seems the dude has only two hands and bottles

Abusing the source along the way, due to presentation

Youse guys don't deserve the truth

Happy people having arrived at the secret scuba hose shop with enough stock to change all their reg hoses

Happy, excited as they understand listening without whining

Geez I wish there really was that ratio of girls in scuba diving!