Pass laid immediately over the root bead with higher current and travel speed. It burns out slag trapped along the root edges, reinforces a thin root before it can crack and ties the root into the bevel walls. On cross-country pipelines it follows the root within minutes as part of the spread sequence. Fill passes then build up the groove and the cap finishes it.
Hot pass crew is three joints behind the stringer, tell them to pick it up.
Also heard as
- second pass
Related terms
Root pass
The first weld pass in a joint, laid at the root, which sets the quality of everything above it.
Cap
Shop word for the final layer of passes on the face of a groove weld, the cover pass in code language.
Wagon tracks
Radiographer slang for two parallel lines of slag trapped along the edges of a root pass.
6010
A deep-digging cellulosic stick rod run on DCEP, the classic choice for open-root pipe passes.