Sale has ended but you can still get this app.
Download PIPEFITTER’S REFERENCE Now

Official Description

AD FREE VERSION NOW ON SALE TO CELEBRATE RELEASE ON APPLE AND WINDOWS STORE

Reference book for pipefitters includes some of the following:
Flange Dimensions 150,300,600,900,1500,2500(Pipe O.D.,ID,Stud length,number of studs, Wrench size etc.)
Valve Dimensions
Pipe Schedules
1/2 Dimensions
Pressure Ratings for Testing
Same as free version but with out the ad banners on the top and bottom of the page's

https://play.google.com/store/apps/details?id=appinventor.ai_jpicer.PipefitterHandbook
https://itunes.apple.com/ca/app/pipe-fitter-reference/id1003648270?mt=8
https://www.microsoft.com/en-us/store/apps/pipefitters-reference/9nblggh1rhk1