Bluestar International supplies Bulk Head Union Tube Fittings. Bluestar International is an ISO 9001:2000 and 14001:2004 accredited company. Bluestar International manufactures instrumentation fittings and flanges. The size of the outside diameter of Bulk Head Union Tube Fittings Fittings is available in the range from 1/8 to 1 inch. Bulk Head Union Tube Fittings are designed for instrumentation and process control system tubing, double ferrule compression tube fittings are provided for leak proof, torque free seal at all tubing connections, and eliminates costly hazardous leaks in process and instrumentation tubing lines.