Grooved solution for OGS and AGS. Industrial prefabrication. Coated pipe for Marine and Chemical Environmental. TRE EFFE have been involved with the design development and manufacturing OFF-SITE prefabricated packaged plantrooms and skid solutions for over 30 years. Our bespoke prefabricated package plantrooms and skids can consist of: Steam generation Water storage and pumping Chilled water HVAC Ventilation Refrigeration Heat Pump systems Melting cooling system