Editor's Page

June 18, 1998

Dear TubeNet visitor,

There will soon be an update on Tubenet. I've been working with an upgrade that enables register listings also country-by-country and state-by-state for US. That will help locating local industries more easily. The present registers will remain as they appear and the postings will go automatically to both of these registers. And, as before, free of charge.

The issue that I wish to arise discussion now is problem with inches and metrics. I know that one inch is 25.4 mm. But there are different standards like N.S. (I guess that comes from Nominal Size). With this standard "one" inch is 33.7 mm. This is confusing me especially if the N.S. is not been mentioned with the diameter. What is this NS after all? Why 1" is 33.7? Is there any way to know what standard should be used if that has not been clearly stated

The same problem is with copper tubes. There are also standards where 1" is not 25.4 mm.

I'd like to make this matter totally clear and will place that on Tubenet website too.

Best regards,

Juha Haapala