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A '''weld neck flange''' (also known as a '''high-hub flange'''<ref name="Parisher and Rhea"/> and '''tapered hub flange'''<ref name="Kuppan Thulukkanam">((cite book |url=https://books.google.com/books?id=ZsU5A1mANWUC&dq=%22Weld+neck+flange%22&pg=PA620 |title=Heat Exchanger Design Handbook |edition=2nd |last=Thulukkanam |first=Kuppan |page=620 |publisher=[[CRC Press]] |isbn=9781439842126 |date=20 May 2013 |accessdate=15 October 2014))</ref>) is a type of [[flange]].  There are two designs. The regular type is used with pipes. The long type is unsuitable for pipes and is used in process plant.<ref>((cite web |url=http://piping-designer.com/Weld_Neck_Flange |archive-url=https://web.archive.org/web/20100731001251/http://piping-designer.com/Weld_Neck_Flange |archive-date=2010-07-31  |title=Piping Designer - Resources for piping, engineering and design |publisher=piping-designer.com/ |accessdate=9 September 2022))</ref> A weld neck flange consists of a circular fitting with a protruding rim around the circumference. Generally machined from a [[forging]], these flanges are typically [[Butt welding|butt welded]] to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts.<ref name="Peter Smith"/>

Such flanges are suitable for use in hostile environments that have extremes of temperature, pressure or other sources of stress.<ref name="Peter Smith">((cite book |url=https://books.google.com/books?id=ep5-MDDnt3YC&dq=%22Weld+neck+flange%22&pg=PA195 |pages=195–196 |title=Piping Materials Guide |last=Smith |first=Peter |publisher=[[Gulf Publishing Company]] |date=20 January 2005  |isbn=9780080480022 |accessdate=15 October 2014))</ref> The resilience of this type of flange is achieved by sharing the environmental stress with the pipe with which it is welded.<ref name="Parisher and Rhea">((cite book |url=https://books.google.com/books?id=DS_AkW9uiUgC&dq=%22Weld+neck+flange%22&pg=PA59 |pages=59–60 |title=Pipe Drafting and Design |author=Roy A. Parisher, Robert A. Rhea |publisher=[[Gulf Publishing Company]] |date= 4 October 2011  |isbn=9780123847010 |accessdate=15 October 2014))</ref> This type of flange has been used successfully at pressures up to 5,000 [[Pounds per square inch|psi]].<ref name="Kuppan Thulukkanam"/>

==References==
((Reflist))

[[Category:Piping]]


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