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Pipes and Tubes - Imperial vs. Metric Sizes

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Pipes and Tubes - Imperial vs. Metric Sizes
Nominal Imperial Pipe Size
(NPS)		Nominal Metric Pipe Size
(DN)		ASHRAE
(mm)		AWWA
(mm)		NFPA
(mm)		ASTM
copper tube
(mm)
1/8 6 6
3/16 8 8
1/4 10 8 10
3/8 12 10 12
1/2 15 15 12.7, 13 12 15
5/8 18 18
3/4 20 20 22
1 25 25 25 25, 25.4 28
1 1/4 32 32 33 35
1 1/2 40 40 45 38, 38.1 42
2 50 50 50, 50.8 51 54
2 1/2 65 65 63, 63.5 63.5, 64 67
3 80 80 75 76, 80 79
3 1/2 90 89
4 100 100 100 102 105
4 1/2 115 114.3
5 125 127 130
6 150 150 150 152 156
8 200 200 200 103 206
10 250 250 250 257
12 300 300 300 305 308
14 350 350
16 400 400
18 450
20 500 500
24 600 600
28 700
30 750
32 800
36 900
40 1000
44 1100
48 1200
52 1300
56 1400
60 1500
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Related Topics

• Dimensions

Sizes and dimensions of pipes and tubes, and their fittings - inside and outside diameter, weight and more.

Related Documents

ANSI Schedule 40 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for ANSI schedule 40 steel pipes.

ANSI Schedule 80 Steel Pipes - Dimensions

Internal and external diameters, areas, weights, volumes and number of threads for schedule 80 steel pipes.

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions

Pipe sizes, inside and outside diameters, wall thickness, schedules, moment of inertia, transverse area, weight of pipe filled with water - U.S. Customary Units.

ASME/ANSI B36.10/19 - Carbon, Alloy and Stainless Steel Pipes - Dimensions - Metric Units

Pipe sizes, inside and outside diameters, wall thickness, schedules, weight and weight of pipe filled with water - Metric Units.

ASTM D1785 and ASTM F441 - PVC and CPVC Pipes Schedule 40 & 80

Standard dimensions and weight of PVC - Polyvinyl Chloride - and CPVC - Chlorinated Polyvinyl Chloride.

BS 2871 Copper Tubes Table X, Y and Z - Working Pressures vs. Size

Working pressures of metric sized copper tubes according the BS (British Standard) 2871.

ISO 161 - Thermoplastics Pipes - Dimensions

Dimensions of thermoplastic pipes according ISO 161.

ISO 4427 - PE Pipes for Water Supply - Dimensions

Polyethylene pipe dimensions according European Standards.

NPS - 'Nominal Pipe Size' and DN - 'Diametre Nominal'

The size of pipes, fittings, flanges and valves are often given in inches as NPS - Nominal Pipe Size, or in metric units as DN - 'Diametre Nominal'.

SDR (Standard Dimension Ratio) and S Pipe Series

The Standard Dimension Ratio - SDR - is used to rate pressure pipes.

Stainless Steel Pipes - Dimensions and Weights

Dimensions, wall thickness and weights of stainless steel pipes according to ASME B36.19 Stainless Steel Pipes.

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