High pressure welding cylinder FYI's

[aametalmaster]

We just had a batch of cylinders fail inspection because there were date stamping's below the radius of the neck. New ruling no marks below the neck including stamping's and dents. I have seen lots of those pass thru here in the last 5 months. So don't buy any used cylinders with those markings. Just passing this on...Bob

[OscarJr]

explicitly define "radius of the neck". Better yet, can you attach a picture with a diagram label where it depicts this? Thanks

[aametalmaster]

From the line down....Bob

[Oldgrandad]

Thanks for the information. We have about 30 tanks in our shop just checked them, all good but that will be something to watch for. Thanks again

[Olivero]

Thanks for the heads up.

[ryanjones2150]

Bob, is this a new DOT rule or something from whoever does your hydro testing? Thats a heck of a note I tell ya. A lot of people gonna be upset. We have HUNDREDS of high pressure cylinders for breathing air at the fire department. The old ones are solid metal but the newer ones (I say newer...15 year old now) are steel wrapped in carbon fiber. Instead of stamping the hydro dates into them, we have an embossed sticker put on them. Maybe thats the direction this is going.

[aametalmaster]

From what i have been told its been on the books for a while but now that the testing companies are using ultrasound that measure the thickness it shows up. I asked a place that does the hydro test and they won't touch them either. We have about 400 cylinders here and i have looked at the half on the floor. I have seen lots of CO2 cylinders i fill for the beer fans and most of them are stamped on the side. So looks like they will be screwed too...Bob

[aametalmaster]

http://www.c-f-c.com/gaslink/docs/dot_cylinder.htm Its the 2nd Number 1 close to the top...Bob

(1) Additional information not affecting the markings prescribed in the applicable cylinder specification may be placed on the cylinder. No indentation may be made in the sidewall of the cylinder unless specifically permitted in the applicable specification.

[OscarJr]

Interesting. I'll be sure to check mine. All of mine come from the same LWS, so if they say anything I can easily say, "well that's how you gave them to me".

[Olivero]

I'm in the same boat as Oscar

[aametalmaster]

Interesting. I'll be sure to check mine. All of mine come from the same LWS, so if they say anything I can easily say, "well that's how you gave them to me".

Well since i am our LWS i have to check every cylinder real good that comes in the door...Bob

[H80N]

Some Rejects are being made into bells and gongs

https://www.youtube.com/results?sear...cylinder+bells

[aametalmaster]

Some Rejects are being made into bells and gongs

I took one for an air tank for my compressor I just checked 2 that failed and one was side stamped but it was a 1915 model so its too old and the stamping doesn't matter on it. The 2nd one is stamped USN under all of the paint..Bob

[H80N]

Then there are worst case scenarios

https://www.youtube.com/watch?v=I1to...1tosV3KSFc#t=0

[aametalmaster]

Reminds me of the old 1982 A Team TV show where they were trapped in an old barn in the middle of nowhere and there just happened to be a 12 pack of full oxygen cylinders. They made a launcher and BA wacked the valve with a sledge and fought their way out...Bob