dublell.xls

This spreadsheet appears to calculate dimensions for double bend spool pieces at different elevations. It came to offshorediver.com from some unremembered source.

angform.xls

This is an old OPD spreadsheet dated 1992. It has formulas and tables relating to metrology, bagging, jetting, sat deco, leg batter, and more. Difficult to follow because of the layout.

flanges.xls

Flange info 150 series to 2500 series, 2" to 24". Has stud length and diameter, nut size, number required. Also has weights for the same range of flanges, blind and weld neck. Bear in mind that offshorediver.com is just passing this tool along; you'd do well to double check it.

pipe_vol.xls

Nicely made volume calculator for pigging.