Hot bolt clamp

A method of repairing a multi-bolt flange of a pipe having a first bolt extending through the multi-bolt flange with a first flange bolt nut disposed adjacent a first flange face and a second flange bolt nut disposed adjacent a second flange face, using a hot bolt clamp, the hot bolt clamp including:

• a lower enclosure and an upper enclosure positionable around the multi-bolt flange to form a clamp body having a first enclosure face and a second enclosure face, and the lower enclosure and the upper enclosure forming a central opening extending through the first enclosure face and the second enclosure face;
• a plurality of flange bolt cavities extending through the first enclosure face and the second enclosure face and extending around the central opening;
• a plurality of restraint bolts extendable through the first enclosure face and the second enclosure face and extending around the central opening;
• a plurality of cutter channels in the first enclosure face and the second enclosure face connecting to the plurality of flange bolt cavities;
• a cutter tool apparatus extendable through at least one of the plurality of cutter channels to access at least one of the flange bolt cavities;
• and
• a sealant injection channel extending through the clamp body to the central opening;
• and
• wherein the plurality of flange bolt cavities includes a first flange bolt cavity;
• and
• the method further comprising:
• connecting the lower enclosure and the upper enclosure around the multi-bolt flange to position the first flange bolt nut and the second flange bolt nut in the first flange bolt cavity on opposite sides of the multi-bolt flange;
• positioning the plurality of retaining bolts from a retaining bolt retracted position to a retaining bolt extended position where each of the plurality of retaining bolts has a distal end pressing against either the first flange face or the second flange face;
• removing the first flange bolt nut from the first flange bolt cavity;
• and
• replacing the first flange bolt nut with a first replacement nut.

A hot bolt clamp for assembly around a multi-bolt flange of a pipe, comprising:

• a lower enclosure and an upper enclosure positionable around the multi-bolt flange having a first enclosure face and a second enclosure face, and the lower enclosure and the upper enclosure forming a central opening extending through the first enclosure face and the second enclosure face;
• a plurality of flange bolt cavities extending through the first enclosure face and the second enclosure face and extending around the central opening;
• a plurality of restraint bolts extendable through the first enclosure face and the second enclosure face and extending around the central opening;
• and
• a plurality of cutter channels in the first enclosure face and the second enclosure face connecting to the plurality of flange bolt cavities.