Hartford Steam Boiler Inspection and Insurance Company (HSB)

Geographic coverage

• United States (headquarters, One State Street, Hartford, CT 06102)
• Canada, via affiliated entity 'The Boiler Inspection and Insurance Company of Canada, A Subsidiary of the Hartford Steam Boiler Inspection and Insurance Company' -- independently corroborated via a second source (the National Board's own AIA registry lists this Canadian subsidiary directly, in addition to the originally-cited Munich Re company directory)
• United Kingdom and Ireland, via affiliated entity 'HSB Engineering Insurance Limited' (HSB EIL) -- INDEPENDENTLY RE-CONFIRMED 2026-08-03 via Munich Re's own HSB Group Subsidiaries page (https://www.munichre.com/hsb/en/about-hsb/hsb-group/subsidaries.html), loaded in a real browser session after direct automated fetch (WebFetch) again returned HTTP 403 for the same URL. Page text confirmed: 'HSB has unified Hartford Steam Boiler in the United States; the Boiler Inspection and Insurance Company of Canada; and HSB Engineering Insurance in the UK together under one global banner', and separately: 'HSB EIL is a leading engineering insurance and inspection company serving customers in the United Kingdom, Ireland and the European Union.' This independently confirms the geographic affiliate claim; no longer flagged as unconfirmed

Notable facts

• Founded in 1866, one of the oldest boiler/pressure-vessel inspection and insurance organizations in the U.S.
• Headquartered at 1 State Street, Hartford, Connecticut
• Described by its own materials as the largest AIA accredited by ASME

Verified credentials

• Part of Munich Re Group, operating as Munich Re Specialty
• A.M. Best financial strength rating A++ (Superior)

✓ = confirmed on the accrediting body's own public registry. (unverified) = the provider's own claim, not independently confirmed in a registry. Never take a certification claim at face value; verify directly with the issuing body before you retain a vendor. See methodology.

Service categories