Over the years, the technology of pipeline pigging hardware hasn't had to change very much. The way they are used, however, has changed quickly.
Just sending a pipe pig through a system and expecting it be be clean is naive. When sending an inline inspection tool through the system, you require that your your pig has reduced or eliminated lift off, so you can get a more accurate result from magnetic flux leakage inspection. The pipeline's efficiency should also be greatly improved after thorough pigging. The best cleaning that ensures the system's peak condition will require the services of a qualified pipeline-cleaning service company such as Professional Piping Services, Inc. The original mechanical pigs were simple devices jury rigged together from bailed cloth and barbed wire. They have matured into today's polyurethane (PU) marvels. Each Poly Pig manufacturer will choose their own blends and ratios of pre-polymers & curing compounds that combine to create the castable fluid with various foam densities, abrasion resistance, elasticities and other variables that impact effectiveness and durability in any given application. What kinds of Pigs are available? The applications that Poly Pigs can be used for, and the forms they might take are as varied as the piping industry itself. For the most part, pigs are are made in sizes with a 1.5 length to diameter ratio. Keeping your bends, or ells, to a minimum of 1.5D is therefore important for them to be easily piggable. Tandem pigs can be used to navigate the tighter ells, if retrofitting an existing system is not an option. There is much more to this topic than the author can address at this time. When you need help with your piping system, don't trust me, trust my client, Professional Piping Services, Inc. The author of this article has referenced source(s) from the internet including an article from pgjonline.com. The client for whom this is written is much more knowledgeable about the topic than the author. Any inaccuracy or error should be attributed to the author, and not the Poly Pig Specialists themselves, or the referenced article(s).
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