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: IPS vs. NPS
: IPS vs. NPS -- foodequipeng	Post Reply	Top of thread	Engineering Forum

Posted by: AAP ® 04/19/2010, 19:19:38 Author Profile eMail author Edit

During the early years of the oil and gas industry in the United States, the dimensional system was known as iron pipe size(IPS). The size identified the approximate inside diameter of the pipe in inches. For example IPS 6 pipe has an inside diameter of approximately 6 inches. Wrought-iron pipe has been almost completely supplanted by steel pipe. As ANSI B3R.10-1970 states that "the size of all pipe is identified by nominal pipe size", The new designation, known as "nominal pipe size," replaced the terminology IPS. Essentially, nominal pipe size is a dimensionless designator of pipe size. It identifies a pipe size without an inch symbol. The NPS 12 and smaller pipes have outside diameters greater than the size designator (2, 4, 6, 8, 10, 12). However, the outside diameter of NPS 14 and larger pipes is the same as the size designator in inches. For example, NPS 14 pipe has an outside diameter equal to 14 in.

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Re: IPS vs. NPS
: IPS vs. NPS -- foodequipeng	Post Reply	Top of thread	Engineering Forum

Posted by: Kelly Bramble ® 10/20/2006, 08:41:45 Author Profile eMail author Edit

Pipe connectors and threads terminology... IPS = Internal Pipe Swivel, see picture NPS = National Pipe Thread

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: Re: IPS vs. NPS
: Re: IPS vs. NPS -- Kelly Bramble	Post Reply	Top of thread	Engineering Forum

Posted by: 55golf ® 09/15/2009, 10:52:09 Author Profile eMail author Edit

I believe the I.P.S. he is referring to is the abbreviation for Iron Pipe Size. For comparing outside diameters, I.P.S. = N.P.S.

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