Lawrence,
let a chemical engineer make a slight correction.
When people (all of us) say "alcohol", we're referring to ethyl alcohol, chemical formula CH3-CH2OH.
From a strictly chemical point of view, however, glycol (chemical formula CH2OH - CH2OH) is also an alcohol, because it contains two alcoholic groups. An alcoholic group's formula is - CH2OH.
From a corrosion point of view, their behavior is similar. 
But from a "daily language" point of view you're right, for the word "alcohol", all over the world, stands for ethyl alcohol.
Giovanni S. Crisi    

my role was of a CERTIFIED WELDER who was just passing through and observed this pipe job in progress.Naturally, I must take a peep.It is so pleasing to the eyes and heart to see pipes being rooted evenly and smoothly,but on a visual examination I found no root gap being used,little or no penetration as a result,blow holes and icecles hanging inside the pipe.Now,if you want a clean root, we usually use TIG with 70s2 wire,then 7018 for fill and cap,as we did with some (Ammonia) pipes.but what I saw was distasteful.It looked like the welder don't have a clue of the nature of the job or simply can't weld pipe.I intend to put this to management to draft up a WPS to be used by all contractors doing any welding at our beer factory.