Parveen Industries Pvt. Ltd. Offers Mud Tank Unions. The Mud Tank Unions falls in the category of Treating Irons, Unions, Swivels and Circulating Heads. Parveen Industries Pvt. Ltd. Is an ISO 9001: 2000 certified company. The Mud Tank Unions are manufactured for a maximum line pressure of 150 PSI. The nitrile seal provides compressive seal, the cross-section of the seal designed to provide greater sealing surface. The union is designed to take a maximum of 7 Degree misalignment on the pipe. The sizes in which the Mud Tank Unions available are 6, 8, 10 and 12, 6, 8 and 10 inches can be socket welded to pipe or butt welded to tubing.