They connect to the top of a pipe segment by means of circumferential grooves pressed (or Lower) around the conclude on the pipe being joined. They're extensively applied on greater steel pipes, and may also be employed with other supplies. Fasteners sign up for, or affix, two or more objects. http://spencerlxaee.getblogs.net/16692701/top-latest-five-valves-and-fittings-urban-news