Hot Bolting is the sequential removal and replacement of bolts on flanged joints while under reduced operating pressure. It is carried out one bolt at a time in a predetermined cross-pattern sequence. Each replaced bolt is fully tensioned before the next one is removed. These services are performed without any damage, leakages, or interruptions in daily production. It is a modular
segmented clamp, which when correctly assembled on a bolted flange while in service, permits the safe removal of one or more of the parent flange bolts without risk to the integrity of the parent flange.
The design basis of the HydratightMorSafe clamp :
1. The design is simple and safe to install and capable of being ‘abandoned’ if any unforeseen events occur while being fitted.
2. The clamp will have minimal effect on the installed parent gasket.
3. The clamp is preloaded to negate any change of load effects due to the use of mechanical tools to remove studs and/or sudden load release by a failed bolt. It is impossible to accurately predict the force required to remove a rusty corroded bolt.
4. The clamp is capable of being fitted and installed on the flange for long periods without risk to the integrity of the flange or system.
5. Clamps are designed to permit safe access of a specified tool to remove the corroded bolt. Generally, due to bolt spacing, it is only possible to include window access for flanges with 4 bolts. On flanges with 8 bolts or more, using nut-splitters is not possible for nut/bolt removal.