Founded in 1962 as a four-employee contract job machine shop, Tri-State Machine has grown into a Wheeling, West Virginia manufacturer with more than 400,000 square feet of combined fabrication and machining floor space. It makes and overhauls traction gear units for transportation companies and authorities, alongside contract machining and fabrication work for customers in several industries.
AWS D1.1 Welding
AWS D1.5 Fracture Critical Welding
EN Welding Standards