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IPS vs. NPS
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Posted by: foodequipeng

10/20/2006, 08:19:36

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Can anyone tell me if "IPS" and "NPS" pipe threads are synonymous with each other? If not what is the difference?







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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

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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

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

NPS = National Pipe Thread


ips.jpg (25.3 KB)  






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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

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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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