[The International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers, and Helpers, AFL-CIO the international brotherhood of boilermakers is a diverse union representing workers throughout the united states and canada. our members are employed in heavy industry, shipbuilding, manufacturing, railroads, cement, mining, and related industries. we construct and repair electric power plants, refineries, pulp and paper mills, and steel mills. we build naval ships and commercial tankers, repair locomotives, make cement, and mine coal, gypsum, and talc. we forge tools for industry and make]