When selecting pumps, it is inevitable to talk about pipelines (usually pressure ones). To understand each other well, we must use the same names. For some, it is a 50 mm pipe up to PE50 (50 mm on the outside), for others it is DN50 (e.g. stainless steel Ø60.3x2) and for still others it is ~50 mm inside (e.g. PE63x5.8) because this is how we calculate losses on the pipelines. Below we present a table of typical pipes according to various materials and standards: metric and inch. When talking to a consultant, please provide the exact diameter of the pipeline in question.

DN

Inches

DIN

ISO

EP

6

⅛”

-

10.00mm

-

8

¼”

-

13.50mm

-

10

⅜”

14.00mm

17.20mm

PE16

15

½”

20.00mm

21.30mm

PE20

20

¾”

25.00mm

26.90mm

PE25

25

1”

30.00mm

33.70mm

PE32

32

1¼”

38.00mm

42.40mm

PE40

40

1½”

44.50mm

48.30mm

PE50

50

2”

57.00mm

60.30mm

PE63

65

2½”

76.10mm

76.10mm

PE75

80

3”

88.90mm

88.90mm

PE90

100

4”

108.00mm

114.30mm

PE110

125

5”

133.00mm

139.70mm

PE140

150

6”

159.00mm

168.30mm

PE160