Research & Innovation in Metal for 35 years. TPSM is an ideas driven business specialising in sheet metal work, helping clients find solutions to mechanical and electrical design and manufacturing problems. Founded in 1986, Teparay Precision Sheet Metal Ltd (TPSM) remains a family owned and run enterprise. The Company has grown significantly over the years and now occupies 60,000 sq. ft. of factory and warehouse space in Hainault, Essex, ideally located for London and the M25.