IPS PIPE SIZES (INCHES) – (Iron Pipe Size based)
Iron pipe size, or IPS, is the original pipe sizing system from the early 19th century. IPS is still the predominant sizing system used in most industries including oil and gas gathering, gas distribution, mining, and some potable water and wastewater applications.
American Standard SizeNominal Pipe Size IPS (Known as Inches)Real Size Outside Diameter (OD)(Inches)Real Outside Diameter (OD)(mm) 1 Inch = 25,4 mmCloser Metric Pipe size or(
mm) (NOT THE SAME)1/2″ IPS0,84″21,34 mm20 mm3/4″ IPS1,05″26,67 mm25 mm1″ IPS1,32″33,40 mm32 mm1-1/4″ IPS1,66″42,16 mm40 mm1-1/2″ IPS1,90″48,26 mm50 mm2″ IPS2,38″60,33 mm63 mm2-1/2″ IPS2,87″72,90 mm75 mm3″ IPS3,50″88,90 mm90 mm4″ IPS4,50″114,30 mm110 mm5″ IPS5,56″141,22 mm140 mm6″ IPS6,63″168,28 mm160 mm7″ IPS7,13″180,98 mm180 mm8″ IPS8,63″219,08 mm200 mm10″ IPS10,75″273,05 mm250 mm12″ IPS12,75″323,85 mm315 mm14″ IPS14,00″355,60 mm355 mm16″ IPS16,00″406,40 mm400 mm18″ IPS18,00″457,20 mm450 mm20″ IPS20,00″508,00 mm500 mm22″ IPS22,00″558,80 mm550 mm24″ IPS24,00″609,60 mm600 mm25″ IPS25,00″630,00 mm630 mm28″ IPS28,00″711,20 mm700 mm30″ IPS30,00″762,00 mm750 mm32″ IPS32,00″812,80 mm800 mm36″ IPS36,00″914,40 mm900 mm42″ IPS42,00″1066,80 mm1000 mm48″ IPS48,00″1219,20 mm1200 mm
DIPS PIPE SIZES (INCHES) – (Ductile Iron Pipe Size based)
Ductile iron pipe size, or DIPS, was created in 1948 when iron pipe wall thicknesses were more controllable and a required inside diameter (ID) could be maintained. The DIPS pipe sizing system is the predominant sizing system used in potable water and sewer applications still today.
Nominal Pipe Size DIPS (Known as Inches)Real Size Outside Diameter (OD)
(Inches)Real Outside Diameter (OD) (mm) 1 Inch = 25,4 mm3″ DIPS3,96 mm100,584 mm4″ DIPS4,8 mm121,92 mm6″ DIPS6,9 mm175,26 mm8″ DIPS9,05 mm229,87 mm10″ DIPS11,1 mm281,94 mm12″ DIPS13,2 mm335,28 mm14″ DIPS15,3 mm388,62 mm16″ DIPS17,4 mm441,96 mm18″ DIPS19,5 mm495,3 mm20″ DIPS21,6 mm548,64 mm24″ DIPS25,8 mm655,32 mm30″ DIPS32 mm812,8 mm36″ DIPS38,3 mm972,82 mm42″ DIPS44,5 mm1130,3 mm48″ DIPS50,8 mm1290,32 mm
METRIC PIPE SIZES (mm) – (European sizes)
mm Pipe DN
Nominal Diametermm OD
Outside DiameterCloser Inches IPS Pipe size (NOT THE SAME)20 mm20,31/2″ IPS = 21,34 mm25 mm25,33/4″ IPS = 26,67 mm32 mm32,31″ IPS = 33,40 mm40 mm40,41-1/4″ IPS = 42,16 mm50 mm50,51-1/2″ IPS = 48,26 mm63 mm63,4 mm2″ IPS = 60,33 mm75 mm75,52-1/2″ IPS = 72,90 mm90 mm90,6 mm3″ IPS = 88,90 mm110 mm110,7 mm4″ IPS = 114,30 mm140 mm140,95″ IPS = 141,22 mm160 mm161 mm6″ IPS = 168,28 mm180 mm181,17″ IPS = 180,98 mm200 mm201,2 mm8″ IPS = 219,08 mm250 mm249,7 mm10″ IPS = 273,05 mm315 mm314,6 mm12″ IPS = 323,85 mm355 mm354,2 mm14″ IPS = 355,60 mm400 mm399,3 mm16″ IPS = 406,40 mm450 mm449,9 mm18″ IPS = 457,20 mm500 mm499,4 mm20″ IPS = 508,00 mm550 mm5634,4 mm22″ IPS = 558,80 mm600 mm629,2 mm24″ IPS = 609,60 mm630 mm633,8 mm25″ IPS = 630,00 mm700 mm28″ IPS = 711,20 mm750 mm30″ IPS = 762,00 mm800 mm807,2 mm32″ IPS = 812,80 mm900 mm908,1 mm36″ IPS = 914,40 mm1000 mm1009,0 mm42″ IPS = 1066,80 mm1200 mm48″ IPS = 1219,20 mm
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