We could do that, but why? The standard industrial practice ("Schedule 40 DWV" for pipe made to ASTM D-2665 standards, and "Schedule 40 Pressure Rated" for pipe made to ASTM D-1785 standards) works fine and is more descriptive for discussion purposes. When a newby asks what kind of pipe to buy, then we should advise them to look for the ASTM D-1785 marking as assurance that they are getting the strong stuff. I can't tell you how many seemingly well informed store clerks have told me that Sch 40 DWV is exactly the same as Sch 40 pressure.
Just for fun, we could refer to DWV pipe as "Schedule 40 frangible", but most of our audience would need to look that up to get the joke.
Scoring disabled. You must be logged in to score posts.