About: http://webisa.webdatacommons.org/56600575

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Pipe is measured on the OD as it never changes, just like tube never changes on the OD. I deal with pipe and tube as well, most of the time it is OD and wall thickness and ID does not really enter the picture.
http://www.w3.org/ns/prov#wasQuotedFrom	cadillacforums.com