Today, Wieland Thermal Solutions (which acquired Wolverine Tube) offers the in digital PDF format. Many universities and corporate engineering departments have site licenses. However, physical copies still appear on eBay and ABE Books, often fetching high prices due to collector demand.
If you are sizing a chiller barrel or condenser, the Wolverine Engineering Data Book is superior to ASHRAE. If you are picking a flange rating, use TEMA. wolverine engineering data book