Socket weld or slip-on: how the choice is actually made
Two flanges that look similar on a drawing and behave very differently in service, and the assembly detail behind most early failures.
Press fittings, and where flame free joining wins
A press joint is made with a tool rather than a flame. The time saved per joint is the small part; the permit and the fire watch are the large part.
Specifying pipe: material, standard and grade
Four decisions: material, how it was made, the standard it answers to, and the grade. Size range is usually the easy part.