5 Pipe Fittings, Joints and Valves
2020-6-12 · metallic, spiral-wound and ring-joint type (Fig. 5.10). Union When two ends of pipes are joined, the pipe fitting used is called union. A union is made of three parts namely a nut, a male end and a female end. The male and female ends are assembled with the support of the nuts, and necessary pressure is made to connect the joint. Since
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