Which factor contributes to a slug of condensate forming in a steam system?

In a steam system, condensate forms when steam cools and transitions back into water. The correct pitch of piping is crucial for the efficient drainage of this condensate. When the piping has incorrect pitch or sags, it creates low points where condensate can accumulate, leading to the formation of slugs. These slugs can cause operational issues, such as water hammer or reduced system efficiency, because they disrupt the flow of steam and may cause flooding in areas where steam is intended to flow freely.

Proper pipe sizing ensures that the flow rate of steam and condensate is appropriate, while good insulation practices are essential for maintaining steam temperature and minimizing heat loss. Excess steam pressure, though it may impact the system's performance in other ways, does not directly contribute to the formation of condensate slugs in the same manner as improper piping configuration does. Hence, the importance of installing pipework with correct pitch cannot be overstated, as it directly affects how effectively condensate is managed in a steam system.