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HotBolt™ – Self-aligning fastener: To allow for bolting of warped and non-parallel flanges.

HotBolt™ is a bolt concept specially designed for use on steel structures exposed to elevated operating temperatures, heat cycles, and on steel structures exposed to temperature gradients. The optimal solution for Gas turbine exhaust systems, Waste heat recovery systems, HRSG & Steam systems, Incinerators & hot process systems and Flare systems.

The HotBolt™, being in Patent Pending, is a further development of traditional Tension Bolts available in the market. The unique design of the HotBolt™ allows for bolting of structures out of parallelism, and bolting of structures being severe warped and deformed due to heat cycles and temperature gradients. Examples on such structures are Gas Turbine Exhaust Ducting, WHRU and HRSG units, Exhaust Diverter Valves, Incinerators, and Flare Tip Piping with Steel Structures.

Temperature range
Up to 1050 °C

Material selection
Inconel 718, Inconel 625, ASTM A354-660D, B7

Metric or imperial, designed for each application

Stress level
Accumulated stress level from HotBolt™ pre-tension and thermal growth in bolted material will not reach Ϭ proof

Read more about HotBolt™ at