pipe and tube

Pipe Dimensions & Weights Charts (ASME B36.10 and ASME B36.19) – incl. Tolerance

pipe and tube

Pipe Dimensions & Weights Charts (ASME B36.10 and ASME B36.19) – incl. Tolerance

ASME B36.10 (sizes chart for carbon and alloy steel pipes like A53, A106, A333, A335) and ASME B36.19 (sizes chart for stainless, duplex, nickel alloy pipes like A312, A790, A928, B161, etc): NPS x WT and weight in kgs./lbs. per meter/foot. 

ASME B36.10 PIPE SIZE CHART (FOR CARBON/ALLOY PIPES)

The ASME B36.10 pipe size chart is a standardized chart developed by the American Society of Mechanical Engineers (ASME) that details the dimensions and physical properties of welded and seamless wrought steel pipes for high and low temperatures and pressures (carbon and alloy only). This comprehensive chart includes essential information such as the pipe’s outside diameter (OD), wall thickness (expressed in schedule numbers or, for very thick-walled pipes, in inches or millimeters), weight per unit length, and the pipe’s inside diameter (ID) for various nominal pipe sizes (NPS). The ASME B36.10 chart applies to carbon steel pipes and alloy steel pipes. For stainless steel, duplex, super duplex, and nickel alloy pipes (as well as other non-ferrous pipes), the ASME B36.19 pipe size chart must be applied.

ASME B36.10 WEIGHTS IN KG/METER

First line: wall thickness in mm; second line: pipe weight (in Kilograms per meter)

NPSOD mmSch. 5Sch. 10Sch. 20Sch. 30Sch. 40Sch. STDSch. 60Sch. 80Sch. XSSch. 100Sch. 120Sch. 140Sch. 160Sch. XXS
1/810.2870.089
0.21
1.24
0.28
โ€“โ€“1.73
0.37
1.73
0.37
โ€“2.41
0.47
2.41
0.47
โ€“โ€“โ€“โ€“โ€“
1/413.7161.24
0.38
1.65
0.49
โ€“โ€“2.24
0.63
2.24
0.63
โ€“3.02
0.80
3.02
0.80
โ€“โ€“โ€“โ€“โ€“
3/817.1451.24
0.49
1.65
0.63
โ€“โ€“2.31
0.84
2.31
0.84
โ€“3.20
1.10
3.20
1.10
โ€“โ€“โ€“โ€“โ€“
1/221.341.65
0.80
2.11
1.00
โ€“โ€“2.77
1.62
2.77
1.62
โ€“3.73
0.80
3.73
0.80
โ€“โ€“โ€“4.78
1.95
7.47
2.55
ยพ26.671.65
1.03
2.11
1.28
โ€“โ€“2.87
1.69
2.87
1.69
โ€“3.91
2.20
3.91
2.20
โ€“โ€“โ€“5.56
2.90
7.82
3.64
133.4011.65
1.30
2.77
2.09
โ€“โ€“3.38
2.50
3.38
2.50
โ€“4.55
3.24
4.55
3.24
โ€“โ€“โ€“6.35
4.24
9.09
5.45
1 1/442.1641.65
1.65
2.77
2.70
โ€“โ€“3.56
3.39
3.56
3.39
โ€“4.85
4.47
4.85
4.47
โ€“โ€“โ€“6.35
5.61
9.70
7.77
1 1/248.261.65
1.91
2.77
3.11
โ€“โ€“3.68
4.05
3.68
4.05
โ€“5.08
5.41
5.08
5.41
โ€“โ€“โ€“7.14
7.25
10.15
9.56
260.3251.65
2.40
2.77
3.93
โ€“โ€“3.91
5.44
3.91
5.44
โ€“5.54
7.48
5.54
7.48
โ€“โ€“โ€“8.74
11.11
11.07
13.44
2 1/273.0252.11
3.69
3.05
5.26
โ€“โ€“5.16
8.63
5.16
8.63
โ€“7.01
11.41
7.01
11.41
โ€“โ€“โ€“9.53
14.92
14.02
20.39
388.92.11
4.51
3.05
6.45
3.96
8.29
4.78
9.92
5.49
11.29
5.49
11.29
โ€“7.62
15.27
7.62
15.27
โ€“โ€“โ€“11.13
21.35
15.24
27.68
3 1/2101.62.11
5.18
3.05
7.40
โ€“โ€“5.74
13.57
5.74
13.57
โ€“8.08
18.63
8.80
18.63
โ€“โ€“โ€“16.15
34.20
4114.32.11
5.84
3.05
8.36
4.78
12.91
5.56
14.91
6.02
16.07
6.02
16.07
7.14
18.87
8.56
22.32
8.56
22.32
โ€“11.13
28.32
โ€“13.49
33.54
17.12
41.03
5141.32.77
9.47
3.40
11.57
4.78
16.09
5.56
18.61
6.55
21.77
6.55
21.77
7.14
23.62
9.53
30.97
9.53
30.97
โ€“12.70
40.28
โ€“15.88
49.11
19.05
57.43
6168.2752.77
11.32
3.40
13.84
4.78
19.27
6.35
25.38
7.11
28.26
7.11
28.26
9.53
37.31
10.97
42.56
10.97
42.56
12.70
48.73
14.27
54.20
โ€“18.26
67.56
21.95
79.22
8219.0752.77
14.78
3.76
19.96
6.35
33.31
7.04
36.81
8.18
42.55
8.18
42.55
10.31
53.08
12.70
64.64
12.70
64.64
15.09
75.92
18.26
90.44
20.62
100.27
23.01
111.27
22.23
107.92
10273.053.40
22.63
4.19
27.78
6.35
41.77
7.80
51.03
9.27
60.31
9.27
60.31
12.70
81.55
15.09
96.01
12.70
81.55
18.26
114.75
21.44
133.06
25.40
155.15
28.58
172.33
25.40
155.15
12323.853.96
31.25
4.57
36.00
6.35
49.73
8.38
65.20
10.31
79.73
9.53
73.88
14.27
108.96
17.48
132.08
12.70
97.46
21.44
169.91
25.40
186.97
28.58
208.14
33.32
238.76
25.40
186.97
14355.63.96
34.36
6.35
54.69
7.92
67.90
9.53
81.33
11.13
94.55
9.53
81.33
15.09
126.71
19.05
158.10
12.70
107.39
23.83
194.96
27.79
224.65
31.75
253.56
35.71
281.70
โ€“
16406.44.19
41.56
6.35
62.64
7.92
77.83
9.53
93.27
12.70
123.30
9.53
93.27
16.66
160.12
21.44
203.53
12.70
123.30
26.19
245.66
30.96
286.64
36.53
333.19
40.49
365.35
โ€“
18457.24.19
46.81
6.35
70.57
7.92
87.71
11.13
122.38
14.27
155.80
9.53
105.16
19.05
205.74
23.83
254.55
12.70
139.15
29.36
309.62
34.93
363.56
39.67
408.26
45.24
459.37
โ€“
20508โ€“6.35
78.55
9.53
117.15
12.70
155.12
15.09
183.42
9.53
117.15
20.62
247.83
26.19
311.17
12.70
155.12
32.54
381.53
38.10
441.49
44.45
508.11
50.01
564.81
โ€“
22558.8โ€“6.35
86.54
9.53
129.13
12.70
171.09
9.53
129.13
22.23
294.25
28.58
373.83
12.70
171.09
34.93
451.42
41.28
527.02
47.63
600.63
53.98
672.26
โ€“
24609.6โ€“6.35
94.53
9.53
141.12
14.27
209.64
17.48
255.41
9.53
141.12
24.61
355.26
30.96
442.08
12.70
187.06
38.89
547.71
46.02
640.03
52.37
720.15
59.54
808.22
โ€“
26660.46.35
102.36
7.92
127.36
โ€“โ€“โ€“9.53
152.87
10.31
165.18
12.70
202.72
14.27
227.23
โ€“โ€“โ€“โ€“
28711.26.35
110.34
7.92
137.32
โ€“โ€“โ€“9.53
164.85
12.70
218.69
โ€“โ€“โ€“โ€“โ€“
307626.35
118.31
7.92
147.28
12.70
234.67
15.88
292.18
โ€“9.53
176.84
10.31
191.11
11.13
206.09
12.70
234.67
โ€“โ€“โ€“โ€“โ€“
32812.86.35
126.31
7.92
157.24
โ€“โ€“โ€“9.53
188.82
10.31
204.08
11.13
220.08
12.70
250.64
โ€“โ€“โ€“โ€“โ€“
34863.66.35
134.30
7.92
167.20
โ€“โ€“โ€“9.53
200.31
10.31
217.05
11.13
234.08
12.70
266.61
โ€“โ€“โ€“โ€“โ€“
36914.46.35
142.13
7.92
176.96
12.70
282.27
15.88
351.70
19.05
420.42
9.53
212.56
10.31
229.76
11.13
247.31
12.70
282.27
โ€“โ€“โ€“โ€“โ€“
401016โ€“โ€“โ€“โ€“โ€“9.53
236.53
12.70
314.22
โ€“โ€“โ€“โ€“โ€“
421066.87.92
207.92
โ€“โ€“โ€“โ€“9.53
248.52
12.70
330.19
โ€“โ€“โ€“โ€“โ€“
481219.2โ€“โ€“โ€“โ€“โ€“9.53
284.24
12.70
377.79
โ€“โ€“โ€“โ€“โ€“

ASME B36.10 WEIGHTS IN LBS/FT.

First line: wall thickness in inches; second line: pipe weight (in lbs./foot)

NPSOD Inch.5S510S10203040S/STD.406080S/XS80100120140160XXS
1/80.405.035
.1383
.049
.1863
.049
.1863
.068
.2447
.068
.2447
.095
.3145
.095
.3145
1/40.54.049
.2570
.065
.3297
.065
.3297
.088
.4248
.088
.4248
.119
.5351
.119
.5351
3/80.675.049
.3276
.065
.4235
.065
.4235
.091
.5676
.091
.5676
.126
.7338
.126
.7338
1/20.84.065
.5383
.065
.5383
.083
.6710
.083
.6710
.109
.8510
.109
.8510
.147
1.088
.147
1.088
.187
1.304
.294
1.714
3/41.05.065
.6838
.065
.6838
.083
.8572
.083
.8572
.113
1.131
.113
1.131
.154
1.474
.154
1.474
.218
1.937
.308
2.441
11.315.065
.8678
.065
.8678
.109
1.404
.109
1.404
.133
1.679
.133
1.679
.179
2.172
.179
2.172
.250
2.844
.358
3.659
1-1/41.66.065
1.107
.065
1.107
.109
1.806
.109
1.806
.140
2.273
.140
2.273
.191
2.997
.191
2.997
.250
3.765
.382
5.214
1-1/21.9.065
1.274
.065
1.274
.109
2.085
.109
2.085
.145
2.718
.145
2.718
.200
3.631
.200
3.631
.281
4.859
.400
6.408
22.375.065
1.604
.065
1.604
.109
2.638
.109
2.638
.154
3.653
.154
3.653
.218
5.022
.218
5.022
.343
7.444
.436
9.029
2-1/22.875.083
2.475
.083
2.475
.120
3.531
.120
3.531
.203
5.793
.203
5.793
.276
7.661
.276
7.661
.375
10.01
.552
13.70
33.5.083
3.029
.083
3.029
.120
4.332
.120
4.332
.216
7.576
.216
7.576
.300
10.25
.300
10.25
.437
14.32
.600
18.58
3-1/24.083
3.472
.083
3.472
.120
4.973
.120
4.973
.226
9.109
.226
9.109
.318
12.51
.318
12.51
.636
22.85
44.5.083
3.915
.083
3.915
.120
5.613
.120
5.613
.237
10.79
.237
10.79
.281
12.66
.337
14.98
.337
14.98
.437
19.01
.531
22.51
.674
27.54
4-1/25.247
12.53
.355
17.61
.710
32.53
55.563.109
6.349
.109
6.349
.134
7.770
.134
7.770
.258
14.62
.258
14.62
.375
20.78
.375
20.78
.500
27.04
.625
32.96
.750
38.55
66.625.109
7.585
.109
7.585
.134
9.290
.134
9.290
.280
18.97
.280
18.97
.432
28.57
.432
28.57
.562
36.39
.718
45.3
.864
53.16
77.625.301
23.57
.500
38.05
.875
63.08
88.6250.1090.109.148
13.40
.148
13.40
.250
22.36
.277
24.70
.322
28.55
.322
28.55
.406
35.64
.500
43.39
.500
43.39
.593
50.87
.718
60.93
.812
67.76
.906
74.69
.885
72.42
99.625.342
33.9
.500
48.72
1010.75.134
15.19
.134
15.19
.165
18.65
.165
18.65
.250
28.04
.307
34.24
.365
40.48
.365
40.48
.500
54.74
.500
54.74
.593
64.33
.718
76.93
.843
89.20
1.000
104.1
1.125
115.7
1111.75.375
45.55
.500
60.07
1212.75.156
21.07
.165
22.18
.180
24.17
.180
24.17
.250
33.38
.307
34.24
.365
40.48
.365
40.48
.500
54.74
.500
54.74
.593
64.33
.718
76.93
.843
89.20
1.000
104.1
1.125
115.7
1414.156
23.07
.188
27.73
.250
36.71
.312
45.38
.375
54.57
.375
54.57
.437
63.37
.593
84.91
.500
72.09
.750
106.1
.937
130.7
1.093
150.7
1.250
170.2
1.406
189.1
1616.165
27.90
.188
31.75
.250
42.05
.312
52.36
.375
62.58
.375
62.58
.500
82.77
.656
107.5
.500
82.77
.843
136.5
1.031
164.8
1.218
192.3
1.427
223.5
1.593
245.1
1818.165
31.43
.188
35.76
.250
47.39
.312
59.03
.437
82.06
.375
70.59
.562
104.2
.750
138.2
.500
93.45
.937
170.8
1.156
208.0
1.375
244.1
1.562
274.2
1.781
308.5
2020.188
39.78
.218
46.05
.250
52.73
.375
78.6
.500
104.1
.375
78.6
.593
122.9
.812
166.4
.500
104.1
1.031
208.9
1.280
256.1
1.500
296.4
1.750
341.1
1.968
379.0
2222.188
43.8
.218
50.71
.250
58.07
.375
86.61
.500
114.81
.375
86.61
.875
197.41
.500
114.81
1.125
250.81
1.375
302.88
1.625
353.61
1.875
403.0
2.125
451.06
2424.218
55.37
.250
63.41
.250
63.41
.375
94.62
.562
140.8
.375
94.62
.687
171.2
.968
238.1
.500
125.5
1.218
296.4
1.531
367.4
1.812
429.4
2.062
483.1
2.344
542.13
2626.312
85.60
.500
136.17
.375
102.63
.500
136.17
2828.312
92.26
.500
146.85
.625
182.73
.375
110.64
3030.250
79.43
.312
98.93
.312
98.93
.500
157.53
.625
196.08
.375
118.65
.500
157.53
3232.312
105.59
.500
168.21
.625
209.43
.375
126.66
.688
230.08
.500
168.21
3434.312
112.25
.500
178.89
.625
222.78
.375
134.667
.688
244.77
3636.312
118.92
.625
236.13
.375
142.68
.750
262.35
.500
189.57

โš ๏ธ If you are interested in charts showing only the wall thickness of carbon & alloy steel pipes in inches or in mm by NPS or DN, consult this article.

ASME B36.19 PIPE SIZE CHART (FOR STAINLESS/NICKEL ALLOY PIPES)

The ASME B36.19 pipe size chart is a standardized chart developed by the American Society of Mechanical Engineers (ASME) that specifies the dimensions and physical properties of stainless steel pipes (and higher alloyed grades) intended for high-temperature, high-pressure applications, as well as for corrosive or high-purity applications. Similar to the ASME B36.10 chart for carbon and alloy steel pipes, the B36.19 chart focuses specifically on stainless steel pipes, including seamless and welded types.

ASME B36.19 WEIGHTS IN KG/METER

Sch. 5SSch 10SSch 40SSch 80S
OD mmOD inchWT mm
(WT in)
kg/mWT mm
(WT in)
kg/mWT mm
(WT in)
kg/mWT mm
(WT in)
kg/m
1/810.30.405โ€“โ€“1.25
(0.049)
0.281.73
(0.068)
0.372.42
(0.095)
0.47
1/413.70.54โ€“โ€“1.66
(0.065)
0.492.24
(0.088)
0.633.03
(0.119)
0.8
3/817.20.675โ€“โ€“1.66
(0.065)
0.632.32
(0.091)
0.853.20
(0.126)
1.1
1/221.30.841.65
(0.065)
0.812.11
(0.083)
12.77
(0.109)
1.273.74
(0.147)
1.62
3/426.71.051.65
(0.065)
1.022.11
(0.083)
1.282.87
(0.113)
1.683.92
(0.154)
2.2
133.41.3151.65
(0.065)
1.32.77
(0.109)
2.093.38
(0.133)
2.54.55
(0.179)
3.24
1 1/442.21.661.65
(0.065)
1.662.77
(0.109)
2.693.56
(0.140)
3.394.86
(0.191)
4.47
1 1/248.31.91.65
(0.065)
1.912.77
(0.109)
3.113.69
(0.145)
4.065.08
(0.200)
5.41
260.32.3751.65
(0.065)
2.42.77
(0.109)
3.933.92
(0.154)
5.455.54
(0.218)
7.49
2 1/2732.8752.11
(0.083)
3.693.05
(0.120)
5.265.16
(0.203)
8.647.01
(0.276)
11.4
388.93.52.11
(0.083)
4.523.05
(0.120)
6.465.49
(0.216)
11.37.62
(0.300)
15.3
3 1/2101.642.11
(0.083)
5.183.05
(0.120)
7.415.74
(0.226)
13.68.08
(0.318)
18.6
4114.34.52.11
(0.083)
5.843.05
(0.120)
8.376.02
(0.237)
16.18.56
(0.337)
22.3
5141.35.5632.77
(0.109)
9.463.41
(0.134)
11.66.56
(0.258)
21.89.53
(0.375)
31
6168.36.6252.77
(0.109)
11.33.41
(0.134)
13.97.12
(0.280)
28.310.98
(0.432)
42.6
8219.18.6252.77
(0.109)
14.83.76
(0.148)
208.18
(0.322)
42.512.70
(0.500)
64.6
10273.110.753.41
(0.134)
22.74.20
(0.165)
27.89.28
(0.365)
60.412.70
(0.500)
81.5
12323.912.753.97
(0.156)
31.34.58
(0.180)
36.19.53
(0.375)
73.912.70
(0.500)
97.4

ASME B36.19 WEIGHTS IN LBS/FT.

NPSOD (mm)OD (inch)Sch 5SWeightSch 10SWeightSch 40SWeightSch 80SWeight
mminchmm (inch)lbs/ft.mm (inch)lbs/ft.mm (inch)lbs/ft.mm (inch)lbs/ft.
1/810.30.405โ€“โ€“1.25 (0.049)0.191.73 (0.068)0.252.42 (0.095)0.32
1/413.70.54โ€“โ€“1.66 (0.065)0.332.24 (0.088)0.423.03 (0.119)0.54
3/817.20.675โ€“โ€“1.66 (0.065)0.422.32 (0.091)0.573.20 (0.126)0.74
1/221.30.841.65 (0.065)0.542.11 (0.083)0.672.77 (0.109)0.853.74 (0.147)1.09
3/426.71.051.65 (0.065)0.692.11 (0.083)0.862.87 (0.113)1.133.92 (0.154)1.48
133.41.3151.65 (0.065)0.872.77 (0.109)1.43.38 (0.133)1.684.55(0.179)2.18
1 1/442.21.661.65 (0.065)1.122.77 (0.109)1.813.56 (0.140)2.284.86 (0.191)3
1 1/248.31.91.65 (0.065)1.282.77 (0.109)2.093.69 (0.145)2.735.08 (0.200)3.64
260.32.3751.65 (0.065)1.612.77 (0.109)2.643.92 (0.154)3.665.54 (0.218)5.03
2 1/2732.8752.11 (0.083)2.483.05 (0.120)3.535.16 (0.203)5.817.01 (0.276)7.66
388.93.52.11 (0.083)3.043.05 (0.120)4.345.49 (0.216)7.597.62 (0.300)10.28
3 1/2101.642.11 (0.083)3.483.05 (0.120)4.985.74 (0.226)9.148.08 (0.318)12.5
4114.34.52.11 (0.083)3.923.05 (0.120)5.626.02 (0.237)10.828.56 (0.337)14.98
5141.35.5632.77 (0.109)6.363.41 (0.134)7.796.56 (0.258)14.659.53 (0.375)20.83
6168.36.6252.77 (0.109)7.593.41 (0.134)9.347.12 (0.280)19.0210.9 (0.432)28.63
8219.18.6252.77 (0.109)9.953.76 (0.148)13.448.18 (0.322)28.5612.7 (0.500)43.41
10273.110.753.41 (0.134)15.254.20 (0.165)18.689.28 (0.365)40.5912.7 (0.500)54.77
12323.912.753.97 (0.156)21.034.58 (0.180)24.269.53 (0.375)49.6612.7 (0.500)65.45

โš ๏ธ If you are interested in charts showing only the wall thickness of stainless steel, duplex, and super duplex steel, nickel alloy pipes in inches or in mm by NPS or DN, consult this article.

STEEL PIPES TOLERANCES (ASME B36.10 & B36.19)

DIAMETER TOLERANCE

The American Society of Mechanical Engineers (ASME) provides specifications for pipe diameter tolerances in various ASME standards, including ASME B36.10M for carbon and alloy steel pipes and ASME B36.19M for stainless steel pipes. These tolerances are essential for ensuring that pipes meet the required dimensions for proper fit and function in piping systems. Tolerance levels vary depending on the manufacturing process (seamless or welded), pipe size, and schedule (wall thickness).

ASME B36.10M (Carbon and Alloy Steel Pipes) & ASME B36.19M (Stainless Steel Pipes) Diameter Tolerances:

1. Outside Diameter (OD) Tolerance for Seamless Pipes:

  • For NPS 1/8 to NPS 10, inclusive, the tolerance is ยฑ1/64 inch (ยฑ0.4 mm).
  • For NPS 12 and above, the OD tolerance is ยฑ1% of the nominal diameter.

2. Outside Diameter (OD) Tolerance for Welded Pipes:

  • Similar to seamless pipes, for NPS 1/8 to NPS 10, inclusive, the tolerance is ยฑ1/64 inch (ยฑ0.4 mm).
  • For NPS 12 and above, welded pipes typically follow the same ยฑ1% tolerance of the nominal diameter, but it’s essential to refer to specific standards or manufacturer specifications for precise values, as the tolerance may vary based on the welding method and pipe manufacturing process.

3. Inside Diameter (ID) Tolerance:

Inside diameter tolerances are not typically specified because they are inferred from the OD and wall thickness tolerances. For a specific ID tolerance, it is necessary to control the OD and wall thickness within the prescribed tolerances.

4. Wall Thickness Tolerance:

Wall thickness tolerance varies depending on the NPS and schedule, but it is generally ยฑ12.5% of the nominal wall thickness for most pipe sizes and schedules as per ASME B36.10M and B36.19M.

It’s important to note that these tolerances are general guidelines. Specific applications may require more stringent tolerances, and manufacturers might offer pipes with tolerances tighter than those specified by ASME standards. Always refer to the latest edition of the relevant ASME standard or consult with the pipe manufacturer to obtain the most accurate and applicable tolerances for your project.

WEIGHT TOLERANCE

ASME B36.10 and ASME B36.19 standards specify dimensions and weights for carbon, alloy, and stainless steel pipes, respectively. However, these standards primarily focus on the dimensions such as outside diameter, wall thickness, and length, and do not explicitly define weight tolerances for pipes. The weight of a pipe is a function of its material, outside diameter, wall thickness, and density; therefore, the weight per unit length can be calculated based on these parameters.

While ASME B36.10 and B36.19 provide the formulae and tables for calculating the theoretical weight of pipes, the actual weight can vary due to manufacturing tolerances on the wall thickness and diameter. These variations in dimensions, as a result of production processes, indirectly result in weight tolerances.

For the specific weight tolerance of pipes, one would typically refer to the manufacturer’s standards or the specifications of the material grade being used. Manufacturers might provide their own tolerances based on their manufacturing capabilities and the specific requirements of the project or industry standards.

When precision in weight is crucial for project specifications, such as for critical load-bearing structures or for transport where weight limits are a concern, it’s advisable to consult directly with the pipe manufacturer to understand the expected weight range or tolerance for the pipes being supplied. Additionally, industry practices or project specifications may set acceptable weight tolerance limits to ensure that the delivered pipes meet the structural or design requirements of the application.

Generally accepted weight tolerance for pipes are:

  • Pipes of NPS 4 (DN100, 114.3mm) and smaller may be weighed in convenient lots; pipes in sizes larger than NPS 4 shall be weighed one by one
  • Pipes NPS 12 (DN300, 323.8mm) and under, weight tolerance is: -3.5% / +10%
  • Pipes over NPS 12 (DN300, 323.8mm),weight tolerance is: -5% / +10%

QUANTITY TOLERANCE

The American Society of Mechanical Engineers (ASME) standards, such as ASME B36.10M for carbon and alloy steel pipes and ASME B36.19M for stainless steel pipes, primarily focus on the dimensions and weights of pipes and do not specify “quantity tolerances” or the acceptable variation in the number of pipes delivered versus the number ordered. Quantity tolerance typically falls under the purview of procurement contracts, project specifications, or supplier agreements rather than being a part of ASME or similar technical standards.

When it comes to the supply and procurement of pipes (or any materials), the terms including quantity tolerance are usually negotiated between the buyer and the supplier and should be clearly outlined in the purchase order or contract. These terms can include:

  • Overage or Shortage Allowance: An agreed percentage of the total order quantity that the supplier is permitted to deliver over or under the specified quantity.
  • Exact Quantity Requirement: Some contracts may require the delivery of the exact quantity specified, with no allowance for overage or underage.
  • Penalties for Non-compliance: Contracts may specify penalties or remedial actions if the delivered quantity does not comply with the agreed terms.

For large projects, it’s common to allow a certain percentage of overage to account for potential installation issues, damage, or miscalculations without significantly impacting the project timeline or budget.

It’s crucial for the purchasing documents to clearly define how quantity tolerances are handled, including any specific requirements or exceptions. Effective communication and agreement between the parties involved can help manage expectations and ensure that project needs are met efficiently.

LENGTH TOLERANCE

ASME standards, including ASME B36.10M for carbon and alloy steel pipes and ASME B36.19M for stainless steel pipes, specify dimensions and other physical characteristics of pipes but typically do not provide explicit tolerances for pipe lengths directly within these standards. However, the length of pipes is an important consideration in project planning and execution, and standard practices exist regarding how it is addressed.

Standard Pipe Lengths and Tolerances

1. Fixed Lengths: When pipes are ordered in fixed lengths, the tolerance is usually defined in the purchase order or agreed upon between the manufacturer and the purchaser. Common practice allows for a tolerance of +0 (no positive tolerance) to a certain amount over the ordered length, often around +1/4 inch to +1/2 inch (about +6 mm to +12 mm) for each fixed length, depending on the total length of the pipe.

2. Random Lengths: Pipes supplied in random lengths typically have a range defined, such as 16 to 22 feet (4.9 to 6.7 meters) for single random lengths or 35 to 45 feet (10.7 to 13.7 meters) for double random lengths. The exact tolerance within these ranges can vary and should be specified by the manufacturer or agreed upon in the contract.

3. Cut Lengths: Pipes cut to specific lengths according to project requirements may have tolerances similar to fixed lengths, with the exact values specified in the contract or standards referenced in the project documentation.

Project-Specific Requirements

For projects with specific requirements, it is common for engineering specifications to define length tolerances more strictly than what might be considered standard practice. These specifications take precedence over general practices and are negotiated as part of the contract or purchase agreement.

Reference to Standards

It’s important to reference the latest version of relevant ASME standards or any applicable project specifications for detailed information on pipe length tolerances. In cases where ASME standards do not explicitly define length tolerances, industry practices, manufacturer standards, and project specifications will guide the acceptable tolerances for pipe lengths.

In summary, while ASME B36.10M and B36.19M standards focus on the dimensional characteristics of pipes, length tolerances are typically addressed through manufacturer standards, purchase agreements, and project-specific requirements, rather than directly in these ASME standards.

NPS TO DN CONVERSION

The table shows the conversion between NPS and the pipe outside diameter in inches, mm, and DN (nominal diameter):

PIPE NPSPipe outside diameter
in inches
Pipe outside diameter
in mm
NPS to DN
conversion
1/80.40410.266
1/40.5413.728
3/80.67517.1510
1/20.8421.3415
ยพ1.0526.6720
11.31533.4025
1 ยผ1.6642.1632
1 ยฝ1.948.2640
22.37560.3350
2 ยฝ2.87573.0365
33.588.9080
3 ยฝ4101.6090
44.5114.30100
4 ยฝ5127.00115
55.563141.30125
66.625168.28150
77.625193.68โ€”
88.625219.08200
1010.75273.05250
1212.75323.85300
1414355.60350
1616406.40400
1818457.20450
2020508.00500
2222558.80550
2424609.60600
2626660.40650
2828711.20700
3030762.00750
3232812.80800
3434863.60850
3636914.40900
3838965.20950
40401016.001000
42421066.801050
44441117.601100
46461168.401150
48481219.20120

Sources:

We recommend purchasing the ASME pipe size specifications from the ASME website or from the IHS store to have a complete a proper understanding of the pipe dimensions topic.

**DISCLAIMER: Accuracy and Reliability of Content**

The information provided in this blog post is intended for general informational purposes only and should not be construed as professional advice. While we strive to provide accurate and up-to-date information, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability of the content contained herein. Any reliance you place on the information presented in this blog post is strictly at your own risk. We disclaim any liability for any loss or damage, including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from reliance on information contained in this blog post. We encourage readers to verify the accuracy and relevance of any information presented here with other sources and seek professional advice or guidance where appropriate. Links to third-party websites or resources provided in this blog post are for convenience only and do not imply endorsement or approval of the content, products, services, or opinions expressed on those websites. We have no control over the nature, content, and availability of those sites and assume no responsibility for their accuracy, legality, or decency. We reserve the right to modify, update, or remove any content in this blog post at any time without prior notice. By accessing and using this blog post, you acknowledge and agree to these terms and conditions. If you do not agree with these terms, please refrain from accessing or using the information provided herein.

About the Author

Picture of Fabrizio S.

Fabrizio S.

Fabrizio is a seasoned professional in the international trading of materials for projects, including piping, steel, and metal commodities with a distinguished career spanning over two decades. He has become a pivotal figure in the industry, renowned for his expertise in bridging the gap between EPC contractors, end users, manufacturers, and stockists to facilitate the seamless delivery of complex piping product packages across the globe. Starting his journey with a strong academic background in business administration and international trade, Fabrizio quickly distinguished himself in the field through his adept negotiation skills, strategic vision, and unparalleled knowledge of the project materials market. His career trajectory has seen him collaborate with leading names in the construction, oil & gas, and petrochemical industries, earning a reputation for excellence in executing large-scale projects (EPC Contractors, Oil & Gas End Users). At the core of Fabrizio's success is his ability to understand the intricate needs of EPC contractors and end users, aligning these with the capabilities of manufacturers and stockists. He excels in orchestrating the entire supply chain process, from product specification and procurement to logistics and on-time delivery, ensuring that each project phase is executed flawlessly. Fabrizio's role involves intense coordination and communication, leveraging his extensive network within the industry to negotiate competitive prices, manage complex logistical challenges, and navigate the regulatory landscape of international trade. His strategic approach to package assembly and delivery has resulted in cost efficiencies, timely project execution, and high satisfaction levels among stakeholders. Beyond his professional achievements, Fabrizio is an active participant in industry forums and conferences, such as Adipec, Tube, and similar, where he shares insights on market trends, supply chain optimization, and the future of project materials trading. His contributions to the field are not only limited to his operational excellence but also include mentoring young professionals entering the trade. Fabrizio is one of the co-founders of Projectmaterials, a B2B marketplace targeting the above markets. https://www.linkedin.com/in/fvs20092023/

Should you wish to reach out to the author of this article, we invite you to contact us via email

7 Responses

  1. Dear Sirs
    Good Morning
    You are kindly requested to send us your best offer for the mentioned as per attached request.
    Please send us the related materials test certificates with the offer.
    Looking forward to receive your offer as soon as possible.
    For any further clarifications, Please do not hesitate to contact us

  2. Dear Sir,

    Please we need the urgent quotation for these items:

    1) PIPE 14″ NB SEAMLESS, ASME B36.10, API SPEC 5L GRADE B PSL2 , SCHEDULE 20, BEVELLED ENDS, ASME B36.10 (6 METRES IS EQUIVALENT TO A PIECE) TO BE SUPPLIED WITH MATERIAL CERTIFICATE BS EN10204-3.1 ACCORDING TO GS EP PVV 141. Manufacturer Part No : TBA. Manufacturer : NO SPECIFIC MANUFACTURER
    QTY 1 PC

    2) PIPE,6″NORMINAL BORE SCHEDULE 40 SEAMLESS, BEVELLED END MATERIAL: API 5L GR.B ASME B36.10 MATERIAL CERTS TO BS EN10204-3.1B REQUIRED AS PER GS EP PVV 143. Manufacturer Part No : NO PART NUMBER. Manufacturer : NO SPECIFIC MANUFACTURER CERTIFICATION / DOCUMENTATION REQUIREMENTS Material Certificate to BSEN10204-3.1B
    QTY 1 M

    3) PIPE 8″ NB C/S API-5L-GR.B(PSL2) ASME B36.10M BE 12M SMLS SCH 20 – (12 METRES IS EQUIVALENT TO A PIECE), TO BE SUPPLIED WITH MATERIAL CERTIFICATE BSEN10204-3.1 ACCORDING TO GS EP PVV 141. Manufacturer Part No : TBA. Manufacturer : NO SPECIFIC MANUFACTURER
    QTY 18 PC

    4)_FLANGE WELD NECK 16″ NB, 150# RF SCH.20, ASTM A105N C/W316 WELDOVERLAID, ASME B16.5 – BE, AS PER GS PVV 141, TO BE SUPPLIED WITH MATERIAL CERTIFICATE EN10204-3.1 ACCORDING TO GS EP PVV 141. Manufacturer Part No : TBA. Manufacturer : NO SPECIFIC MANUFACTURER
    QTY 1 PC

    Please include the total weight, and the time of delivery.

    Thank you and Kind Regards,

    Emelike Mercy
    Procurement Officer
    CANDIX ENGINEERING NIGERIA LIMITED
    10 Azuabie/ Okujagu road
    Opposite govt technical College
    Off Trans Amadi Industrial Layout,
    Port Harcourt, Rivers State.
    http://www.candixnigeria.com
    +2348130166974

  3. Dear Sir/Madam:
    Below is our inquiry and will be thankful to have your offer as soon as possible. At the time of offer, please mention the Country of Origin, delivery time, and give the related data sheets.
    ITEM
    DESCRIPTION
    QTY
    UNIT
    1- 28 IN,PIPE ASME B36,10M BE S.A.W. API5L GR. B PSL1,100% RT, NACE MR 0175/ISO 15156, RP-2224-999-6300-002,SSCC & HIC, S-STD
    6 meter branch (2 LE)
    2- 44 IN, PIPE ASME B36,10M BE S.A.W. API5L GR. B PSL1,100% RT, NACE MR 0175/ISO 15156, RP-2224-999-6300-002,SSCC & HIC, THK 14.27
    6 meter branch (4 LE)
    3- 2 IN,PIPE ASME B36,10M BE SMLS API 5L GR. B PSL1, NACE MR 0175/ISO 15156, RP-2224-999-6300-002,SSCC & HIC, S-80
    6 meter branch (1 LE)
    4- 1.1/2 IN,PIPE ASME B36,10M PE SMLS API 5L GR. B PSL1, NACE MR 0175/ISO 15156, RP-2224-999-6300-002,SSCC & HIC, S-160
    6 meter branch (1 LE)

  4. Dear Sir/Madam,

    Please kindly provide us with detailed quote including price, weight/packaging dimension, lead time and shipment cost for the item
    stated below;

    6.1 PIPE: 1/2 IN, SEAMLESS ASME B36.10M
    QTYT:1 Joint
    PIPE: 1/2 IN, SEAMLESS ASME B36.10M PLAIN END SCHEDULE 160 STAINLESS STEEL ASTM A312 GRADE TP316/TP316L (DUAL-STAMPED) PPAACABZBKIALZ
    Manufacturer (MA) – GENOYER SA

    Find Shipping Address below;
    10511 Kipp Way, Suite 430
    SCL NG1325
    Houston, Texas, 77099

    Regards,
    Chibuzor
    Procurement Personnel
    Kamax Int. Corp. ltd.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.