Hot Bolting AS is a family owned company, established as part of Irgens Engineering AS in 2002. We are specialized in Piping Engineering services within the Oil and Energy sector. Our portfolio covers projects and operational challenges in subjects as; plant layout, pipelines, piping, fitting, flanges, hubs, filters, weldolets, valves, special items, pipe stress, vibration, bolt tension, Hot Bolting, corrosion damages etc.