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Welcome to Hartford Steam Boiler

With 150 years of industry leadership, Hartford Steam Boiler (HSB) sets the standard in equipment breakdown insurance, which was formerly called boiler & machinery insurance. Along with other specialty insurance and reinsurance coverages - including data and cyber risk, employment practices liability, contractors errors and omissions and identity theft insurance - HSB helps you stay ahead of emerging risks in a complex world.

HSB is rated A++ (Superior) by A.M. Best Company. As part of Munich Re we have the ability to leverage a global knowledge base to develop and deliver innovative, forward-thinking risk solutions with technical knowledge, superior risk solutions and customer commitment you can count on.

Our engineering and inspection services force is one of the largest in the world, with over 1,200 engineers, inspectors and technical personnel around the globe. We offer first-class inspection services, loss reduction and engineering-based risk management consultation for business, home and farm.

Hartford Steam Boiler is headquartered in Hartford, Connecticut, U.S. Through our affiliates in Canada and the United Kingdom we serve businesses, industries and institutions worldwide – from "Main Street" businesses to larger operations, such as manufacturing plants - and help them to avoid losses, as well as recover promptly from losses that do occur.

We provide specialty coverages and services, directly through independent agents and brokers, or through our reinsurance arrangements with over 200 multi-line insurance companies. We work with these companies to integrate equipment breakdown insurance and other specialty insurance into their commercial packages.

A.M. Best A++ (Superior) Financial Strength Rating

A.M. Best company affirmed the financial strength rating (FSR) of A++ (Superior) and the issuer credit ratings (ICR) of “aa+” of the members of The Hartford Steam Boiler Group and its member companies on July 24, 2019. The outlook for the ratings is stable.

In its press release A.M. Best said, "The ratings reflect HSB’s balance sheet strength, which AM Best categorizes as strongest, as well as its very strong operating performance, favorable business profile and very strong enterprise risk management (ERM). HSB has a strong reputation for being a specialist insurer in the U.S. commercial market for boiler and machinery breakdown risks, where it holds a leading market share by premium written. ERM is considered to be embedded throughout the whole organization, which has historically put a great focus on loss prevention practices."

A.M. Best Company financial strength rating of A++ (Superior) applies to the following HSB member companies:

  • The Hartford Steam Boiler Inspection and Insurance Company
  • The Boiler Inspection and Insurance Company of Canada
  • The Hartford Steam Boiler Inspection and Insurance Company of Connecticut
  • HSB Engineering Insurance Limited
  • HSB Specialty Insurance Company

Founded in 1899, A.M. Best Company is the world’s oldest and most authoritative insurance rating and information source. For the latest rating, access www.ambest.com.

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© 2019 The Hartford Steam Boiler Inspection and Insurance Company. All rights reserved. This is intended for informational purposes only and does not modify or invalidate any of the provisions, exclusions, terms or conditions of the policy and endorsements. For specific terms and conditions, please refer to the coverage form.


This publication is available exclusively to Munich Re clients. Please contact your Client Manager.