Worthington HP 100s failed first hydro

[Graeme Tolton]

Use Oxyhacker's method.....

DC

I don't believe Vance described a home hydro test.

 

[Can't swim]

Contact these folks, they advertise that they do DOT hydro testing

Fire Equipment Inc
P.O. Box 414259
Boston,MA 02241-4259

 

[Indian Valley Scuba]

..It's true dive shops do not perform testing in-house but they are sending them somewhere familiar with scuba cylinders one would assume...

Not true in all cases. Our facility is DOT certified and we do all hydro's in house. I am sure there might be other full service facilities in the Boston area that are geographically convenient to the OP.

 

[Scott L]

Not true in all cases. Our facility is DOT certified and we do all hydro's in house. I am sure there might be other full service facilities in the Boston area that are geographically convenient to the OP.

Your highly functional shop must be the extreme rairty. On a side note, can you offer information as to the most reliable and the least reliable manufactures as it pertains to steel cylinder hydro tests? Thanks!

 

[Indian Valley Scuba]

To be perfectly honest we have been testing cylinders for five years here. We test steel, aluminum, composite, and specialty cylinders for military and aircraft applications. With regards to steel cyliners we have yet to see a steel cylinder fail hydro based on expansion criteria so I can't give you any data to support one being better than the other. We have failed steel cylinders for other criteria, primarily pitting, excessive rusting, or thread damage, but other than that, they tend to hold up well.

 

[drbill]

Interesting. My first PST HP120 failed its second hydro due to over expansion (and yes, the test facility followed the proper testing protocol for those tanks). My second PST HP120 failed VIP within 18 months of its second hydro. Of course these are PST rather than Worthington cylinders.

It was thought that the first tank failed the hydro due to numerous hot fills at Casino Point. It was used almost entirely for shore-based diving. The second may have failed due to rust caused by water. It was used almost entirely for boat diving.

 

[Indian Valley Scuba]

I am familiar with the fill station trailer at Casino point and would agree that there would be significant stressing there with the rate of filling. So you are saying the "second hydro", was that including the original at time of manufacture, or two subsequent ones? If you got 10 years of service under those conditions you did all right - amortizing the cylinder cost over that many dives works out to be pennies per dive.

And of course the VIP failure is understandable, rust is the biggest killer of steel cylinders, as you well know.

 

[ps1mhd]

Whoever hydroed them is required to X over the S/N or
drill a hole in it or other wise make them unfillable this
will make it hard to retest. If they have not done this
yet they MAY let someone else retest.

 

[Skooter]

Whoever hydroed them is required to X over the S/N or
drill a hole in it or other wise make them unfillable this
will make it hard to retest. If they have not done this
yet they MAY let someone else retest.

A hydro test facility is to X out the cylinder rating . They are not allowed to drill holes or destroy the tank in any other way unless the owner of that tank gives them permision.

 

[carrielsal]

A hydro test facility is to X out the cylinder rating . They are not allowed to drill holes or destroy the tank in any other way unless the owner of that tank gives them permision.

I have never had a tank that failed hydro, but I have always been told that if the tank failed hydro, the facility will drill holes in it. Is that a myth or something the LDS authorizes when they take the tanks to the hydro facility?