DOT#'s OK, whats TW #s?????

[k4sdi]

A friend asked me the other day, he was wondering what the TW numbers mean on a scuba tank? I understand the DOT numbers, but TW? We've seen them on some Scuba tanks, and a lot of fire extinguishers. Ususally their under the DOT numbers. Does it have something to do with Canada dept of Transportation?

Thanks


Mark

 

[metridium]

Tare weight?

 

[neil]

Possibly the mark of the Taylor Wharton company, which makes all sorts of pressure cylinders, but I think they stopped marketing scuba tanks a few years ago. The number would be the serial number or a product code.
Neil

 

[dsgobie]

According to my NAUI Master SCUBA Diver book, the Canadian marking would be either CTC (Canadian Transporation Commission) or prior to 1970, ICC (Interstate Commerce Commission) I wouldn't think it was Canadian then. I would go with what neil said. The Taylor Wharton company.

Anyone else??