Hot bolting clamp
OwnerPer-Christian Irgensinventor
Life of this patent
Estimating the term…
Abstract
Dynamical flange clamp for strengthening flange couplings or taking over the bolt forces in a loaded flange coupling, where opposite clamps (1, 2) are preloaded towards each other, contraholders (3) are fitted on one of the clamps (2), functioning as back stop to absorb the preload. When installed on a flange connection the gasket stress is kept virtually constant during the transfer of forces between the flange coupling bolts and the flange clamp. This is done without any further adjustments to the dynamical flange clamp. The dynamic flange clamp is particularly useful during bolt changes in a Hot Bolting operation.
Claims5
Dynamical flange clamp where opposite clamps are preloaded towards each other, characterized by contraholders fitted on clamp operative as a back stop to absorb the preload.
A method of tensioning a coupling of joining flanges on pipes or tubes comprising,
- surrounding a coupling of joining flanges with joinable collars,
- establishing a preload on the collars,
- back stopping the preload with contraholders to absorb the preload.
Dependencies are inferred from the claim text.