CSI fabricates jackets for all types of valves. There are four basic categories of fabricated jacketed valves. Within each category numerous options are available, such as types and locations of heating medium connections, bonnet jackets or additional heat coverage for specific areas, and materials of construction. To the best of our knowledge there are currently no industrial fabrication standards that specifically address jacketed valves. Unless instructed otherwise by the customer, CSI designs, fabricates and tests jackets for valves in accordance with the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1. Assembled valves that are sent to our shops for jacketing are pressure and leak tested before and after jacketing.