Insulated joints are a general term for pipe joints that have the required sealing properties, strength properties, and electrical insulation properties required for buried steel pipes.Insulated joints are retrofit products based on the problems existing in the use of insulating flanges. They are essential pressure components in steel pipeline cathodic protection systems and are widely used in cathodic protection systems for steel pipelines.

ASME B31.8 API 5L X42 PSL2 Insulation Joint

Monolithic insulated joint consists of the following parts: upper and lower tubes, sleeves, insulation parts, seals, and insulation coatings. There interpose insulating parts and sealing parts between the abutting end faces of the upper and lower tubes of the insulating joint to form a double sealing structure with insulating properties.

Monolothic Insulated Joints

Insulated joints are available in sizes ranging from 1/2″ thru 48″ and pressure ranging from ANSI 150 to ANSI 900. Tube turns monolithic insulated joints electrically isolate sections of pipeline to prevent corrosion caused by stray electrical currents or interference from other pipelines and power transmission cables. Tube Turns Monolithic Joints are boltless to satisfy customers that require a boltless construction for ease of final wrapping and coating after final installation of the pipeline. Tube Turns is fully qualified in house to provide magnetic particle, ultrasonic, and liquid penetrant examination along with NDE test reports to meet customer requirements. Each joint manufactured by tube turns is completely factory assembled and hydrostatically tested to 1.5 times the working pressure before shipment. In addition, each joint is electrically tested to verify its insulating capability.