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Stainless Steel Pipe Sizes and Weight Chart in MM

December 17, 2021December 17, 2021 | 4:16 pm

Measuring the diameter of a pipe might seem quite simple at first – you just measure the diameter of the pipe. However, it’s important that you measure the right diameter with the right unit, so you can tell exactly what size it is, and make sure that when you’re reordering fittings or more pipe, that you choose the right size.
Pipes are a typical material used in the fencing industry, particularly for chain link fences and gates. Pipe and tubing, on the other hand, are not the same thing! Because the pipe was initially designed to transport water, the ID (internal diameter) was the most important parameter. The ID is the nominal dimension for the pipe. So, 1½ inch pipe has a nominal (roughly) 1½ inch inside diameter rather than an outer diameter of 1½ inch. The pipe is often made with looser tolerances and is less expensive to buy. However, in the fencing and construction industries, where the pipe is regularly used, it is frequently referred to by its outer dimension, because fittings, caps, and other pieces most usually mate the pipe’s exterior.

 

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For instance, the steel pipe diameter is indicated by its “Nominal” thickness and NOT actual thickness. In other words, “Nominal” or NPS is a non-dimensional number referring to the diameter of a pipe’s hole. OD’s (Outside Diameter) of pipe remains the same regardless of its Schedule. The thickness of the pipe’s wall is denoted by various “schedules,” the most frequent of which are schedules 5, 10, and 40. The actual wall thickness of any schedule varies depending on the pipe size. A 1-inch Schedule 40 pipe has a.133-inch wall thickness, and a 2-inch Schedule 40 pipe has a.154-inch wall thickness.

Stainless Steel Pipes Sizes range from 1/8 inch to 48-inch large diameter pipe, the most commonly used sizes include 1 inch stainless steel pipe, 1 1/2 inch stainless steel pipe, 2 inch stainless steel pipe, 2 1/2 inch stainless steel pipe, 3 inch stainless steel pipe, 4 inch stainless steel pipe, 5 inch stainless steel pipe, 6 inch stainless steel pipe, 8 inch stainless steel pipe, 12 inch stainless steel pipe, and 36 inch large diameter stainless steel pipe.

Stainless Steel Pipe Size Chart

Pipe Size O.D. Inches 5s TRUE 5 10s TRUE 10 20 30 40s & STD TRUE 40 60
1/8 0.405 0.35 0.049 0.049 0.068 0.068
0.1383 0.1863 0.1863 0.2447 0.2447
1/4 0.54 0.049 0.065 0.065 0.088 0.088
0.257 0.3297 0.3297 0.4248 0.4248
3/8 0.675 0.049 0.065 0.065 0.091 0.091
0.3276 0.4235 0.4235 0.5676 0.5676
1/2 0.84 0.065 0.065 0.083 0.083 0.109 0.109
0.5383 0.5383 0.671 0.671 0.851 0.851
3/4 1.05 0.065 0.065 0.083 0.083 0.113 0.113
0.6838 0.6838 0.8572 0.8572 1.131 1.131
1 1.315 0.065 0.065 0.109 0.19 0.133 0.133
0.8678 0.8678 1.404 1.404 1.679 1.679
1 1/4 1.66 0.065 0.065 0.109 0.109 0.14 0.14
1.107 1.107 1.806 1.806 2.273 2.273
1 1/2 1.9 0.065 0.065 0.109 0.109 0.145 0.145
1.274 1.274 2.638 2.638 2.718 2.718
2 2.375 0.065 0.065 0.109 0.109 0.154 0.154
1.604 1.604 2.638 2.638 3.653 3.653
2 1/2 2.875 0.083 0.083 0.12 0.12 0.203 0.203
2.475 2.475 3.531 3.531 5.793 5.793
3 3.5 0.083 0.083 0.12 0.12 0.216 0.216
3.029 3.029 4.332 4.332 7.576 7.576
3 1/2 4 0.083 0.083 0.12 0.12 0.226 0.226
3.472 3.472 4.97 4.97 9.109 9.109
4 4.5 0.083 0.083 0.12 0.12 0.237 0.237 0.281
3.915 3.915 5.613 5.613 10.79 10.79 12.66
4 1/2 5 0.247
12.53
5 5.563 0.109 0.109 0.134 0.134 0.258 0.258
6.349 6.349 7.77 7.77 14.62 14.62
6 6.625 0.109 0.109 0.134 0.134 0.28 0.28
7.585 7.585 9.289 9.289 18.97 18.97
7 7.625 0.301
23.57
8 8.625 0.109 0.109 0.148 0.148 0.25 0.277 0.322 0.322 0.406
9.914 9.914 13.4 13.4 22.36 24.7 28.55 28.55 35.64
9 9.625 0.342
33.9
10 10.75 0.134 0.134 0.165 0.165 0.25 0.307 0.365 0.365 0.5
15.19 15.19 18.65 18.65 28.04 34.24 40.48 40.48 54.74
11 11.75 0.375
45.55
12 12.75 0.156 0.165 0.18 0.18 0.25 0.33 0.375 0.406 0.562
21.07 22.18 24.2 24.2 33.38 43.77 49.56 53.53 73.16
14 14 0.156 0.188 0.25 0.312 0.375 0.375 0.437 0.593
23.06 27.73 36.71 45.68 54.57 54.57 63.67 84.91
16 16 0.165 0.188 0.25 0.312 0.375 0.375 0.5 0.656
27.9 31.75 42.05 52.36 62.58 62.58 82.77 107.5
18 18 0.165 0.188 0.25 0.312 0.437 0.375 0.562 0.75
31.43 35.76 47.39 59.03 82.06 70.59 104.8 138.2
20 20 0.188 0.218 0.25 0.375 0.5 0.375 0.593 0.812
39.78 46.05 52.73 78.6 104.1 78.6 122.9 166.4
24 24 0.218 0.25 0.25 0.375 0.562 0.375 0.687 0.968
55.37 63.41 63.41 94.62 140.8 94.62 171.2 238.1
26 26 0.312 0.5 0.375
85.6 136.2 102.6
28 28 0.312 0.5 0.625 0.375
92.26 146.8 182.7 110.6
30 30 0.25 0.312 0.312 0.5 0.625 0.375
79.43 98.93 98.93 157.5 196.1 118.6
32 32 0.312 0.5 0.625 0.375 0.688
105.6 168.2 209.4 126.7 230.1
34 34 0.312 0.5 0.625 0.375 0.688
112.3 178.9 222.8 134.7 244.8
36 36 0.312 0.625 0.375 0.75
118.9 236.1 142.7 282.3
40 40 0.375
158.7
42 42 0.375
166.7
48 48 0.375
190.7

ASTM SPECIFICATION & TOLERANCE FOR TUBING & PIPING

Specification Allowable Outside Diameter Allowable Wall Exact Length Testing
Variation in mm Thickness Variation Tolerance in mm
Nominal Diameter Over Under %Over %Under Over Under Flattening Test
ASTM-A213 Under 25.4 0.1016 0.1016 +20 0 3.175 0 Tension Test
Seamless Boiler 25.4-38.1 incl 0.1524 0.1524 +22 0 3.175 0 Flare Test
Superheater and 38.1-50.8 excl 0.2032 0.2032 +22 0 3.176 0 Hardness Test
Heat Exchanger 50.8-63.5 excl 0.254 0.254 +22 0 4.46 0
Tubes 63.5-76.2 excl 0.3048 0.3048 +22 0 4.76 0 100% Hydrostatic test
76.2-101.6 incl 0.381 0.381 +22 0 4.76 0 Refer to ASTM A-450
Under 25.4 0.1016 0.1016 +10 -10 3.175 0
ASTM-A249 25.4-38.1 incl 0.1524 0.1524 +10 -10 3.175 0 Tension Test
Welded Boiler 38.1-50.8 Excl 0.2032 0.2032 +10 -10 3.175 0 Flattening Test
Superheater, Heat 50.0-63.5 excl 0.254 0.254 +10 -10 4.762 0 Flange Test
Exchanger And 63.5-76.2 excl 0.3848 0.3048 +10 -10 4.762 0 Reverse Bend Test
Condenser Tubes 76.2-101.6 incl 0.381 0.381 +10 -10 4.762 0 Hardness Test
Minimum Wall tubes, + 18% 0 available, On request 100% Hydrostastic Test
Refer to ASTM A-450
Untp 12.7 0.13 0.13 +15 -15 3.2 0 Flare Test (Seamless Only)
ASTM-A269 12.7-38.1 excl 0.13 0.13 +10 -10 3.2 0 Flange Test (Welded Only)
Seamless & Welded 38.1-88.9 excl 0.25 0.25 +10 -10 4.8 0 Hardness Test
Tubing for General 88.9-139.7 excl 0.38 0.38 +10 -10 4.8 0 Reverse Flattening Test
Service 139.7-203.2 excl 0.76 0.76 +10 -10 4.8 0 (Welded only)
100% Hydrostatic Test
Refer to ASTM-A269
25.4 0.05 0.20 +10.0 -10.0 3.2 0
38.1 0.05 0.20 +10.0 -10.0 3.2 0 Reverse flattening Test
ASTM-A270 50.8 0.05 0.28 +10.0 -10.0 3.2 0 100% Hydrostastic Test
Seamless & Welded 60.5 0.05 0.28 +10.0 -10.0 3.2 0 External’ polish on all tubes
Sanitary Tubing 76.2 0.08 0.30 +10.0 -10.0 3.2 0 Refer to ASTM A-270
101.6 0.08 0.38 +10.0 -10.0 4.8 0
3.175-38.1 incl 0.4 0.79 Minimum Wall 6.4 0
38.1-1016 incl 0.79 0.79 12.5% under 6.4 0 Tension Test
ASTM-A312 101.6-203.2 incl 1.59 0.79 nominal wall 6.4 0 Flattening Test
Seemless & Welded Specified 100% Hydrostatic Test
pipe (Normally Random Refer to ASTM A-530
Lengths ordered)
ASTM A-358 219.08-750mm +0.5% -0.3 6.0 Refer to ASTM A-530
Welded pipe

WEIGHT & THICKNESS OF S.S GUAGE PIPES

10 SWG 12 SWG 14 SWG 16 SWG 18 SWG 19 SWG
DIMENSION (3.2 MM) (2.6 MM) (2.1 MM) (1.65 MM) (1.2 MM) (1.0 MM)
Size OD Weight/MTR Weight/MTR Weight/MTR Weight/MTR Weight/MTR Weight/MTR
1/2″ 12.7 0.754 0.651 0.552 0.452 0.342 0.290
5/8″ 15.875 1.006 0.856 0.718 0.582 0.437 0.369
3/4″ 19.05 1.258 1.061 0.883 0.712 0.531 0.448
1″ 25.4 1.762 1.470 1.214 0.972 0.720 0.605
1 1/4″ 31.75 2.266 1.880 1.544 1.232 0.909 0.763
1 1/2″ 38.1 2.770 2.289 1.875 1.492 1.098 0.920
2″ 50.8 3.778 3.108 2.537 2.012 1.476 1.235
2 1/2″ 63.5 4.786 3.928 3.198 2.531 1.854 1.550
3″ 76.2 5.794 4.747 3.860 3.051 2.232 1.865
3 1/2″ 88.9 6.802 5.566 4.521 3.571 2.610 2.180
4″ 101.6 7.810 6.385 5.183 4.091 2.988 2.495

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