EPPI is equipped with the facility to produce tubular shrinkable HDPE coupling (Rayjoint). Rayjoint is used as a field joint material when the preinsulated pipes and fittings are joined at the field. The rayjoint can be pressure tested at 0.5 bar. The product is stored in a covered storage area, individually packaged to avoid direct sunlight exposure. The standard size ranges from 90 mm to 1600 mm in diameter. The Rayjoint system can successfully undergo sandbox test as per EN489.
The GI sheet field insulation consists of polyurethane foam chemicals (2-components) poured into a sheet metal roll-up wrapped around the joint. A heat shrinkable sleeve with closure patch is applied and heat shrunk to finish the joint.