Eccentric reducer, flat on bottom (FOB)
ISO 10628-2 (groups 24-25, fittings and piping) / PIP PIC001
Drawn as
A trapezoid with a flat bottom edge and a sloped top, centrelines offset. Often marked "FOB".
Meaning
Eccentric reducer with the flat side down. Used on pipe racks to keep the bottom of pipe level, and on lines that must drain.
Variants
- Marked only by the text FOB on some legends