What is the actual difference between WNRF, SORF, and SWRF Flanges? What are the criteria for selecting which type of flange should be used in a particular size of pipe? - Quora
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What is the actual difference between WNRF, SORF, and SWRF Flanges? What are the criteria for selecting which type of flange should be used in a particular size of pipe? - Quora
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What is the actual difference between WNRF, SORF, and SWRF Flanges? What are the criteria for selecting which type of flange should be used in a particular size of pipe? - Quora