Piping Dimensions (DN Vs NPS)

The size of pipes, fittings, flanges and valves are given in two Units

NPS = Nominal Pipe Size (Inches)

DN = Diameter Nominal (Metric)

Following is the comparison :

Diameter Nominal DN (mm)	Nominal Pipe Size NPS (inches)
6	*1/8*
8	*1/4*
10	*3/8*
15	*1/2*
20	*3/4*
25	1
32	*1 1/4*
40	*1 1/2*
50	2
65	*2 1/2*
80	3
*100*	4
*150*	6
*200*	8
*250*	10
*300*	12
*350*	14
*400*	16
*450*	18
*500*	20
*550*	22
*600*	24
*650*	26
*700*	28
*750*	30
*800*	32
*900*	36
*1000*	40
*1050*	42
*1100*	44
*1200*	48
*1300*	52
*1400*	56
*1500*	60
*1600*	64
*1700*	68
*1800*	72
*1900*	76
*2000*	80
*2200*	88
*2400*	96
*2600*	*104*
*2800*	*112*
*3000*	*120*
*3200*	*128*

Comments

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