Generally speaking, ASME B36.19M prescribed the weights & dimensions of welded and seamless wrought stainless steel pipe for high or low temperatures and pressures. It covers pipes sized from NPS 1/8(DN 6) through NPS 30(DN 750) with four basic wall-thickness designations: SCH 5S, SCH 10S, SCH 40S, SCH 80S. The suffix “S” in the schedule number is used to differentiate B36.19M pipe from B36.10M pipe. The pipe may be either manufactured to ISO metric unit or US Customary unit. The pipe may be furnished with threaded ends, plain ends, or beveled ends.

Materials

The ASME B36.19M seamless or welded pipe shall be be made from (but not limited to) various stainless steel materials covering ferritic stainless steel, austenitic stainless steel, martensitic stainless steel, precipitation-hardening stainless steel, and duplex stainless steel. Moreover, the material range can be extended to titanium & titanium alloy, zirconium & zirconium alloy, nickel & nickel alloy, copper & copper alloy, aluminum & aluminum alloy, etc.

Weight Calculation

The nominal weight of the pipe can be calculated using the following formula:

• US Customary Unit: W_a = 10.69(D – t)t; Metric Unit: W_b = 0.0246615(D – t)t.
• W_a: lb/ft, W_b: kg/m; D: O.D of pipe(inch or mm); t: wall thickness(inch or mm).
• This formula is based on stainless steels. It is not applicable for other materials with variable density.

Dimensions and Weights of ASME B36.19M

NPS	DN	O.D inch mm	SCH No.	Wall inch mm	Weight lb/ft kg/m
1/8	6	0.405 10.3	5S	…	…
1/8	6	0.405 10.3	10S	0.049 1.24	0.19 0.28
1/8	6	0.405 10.3	40S	0.068 1.73	0.24 0.37
1/8	6	0.405 10.3	80S	0.095 2.41	0.31 0.47
1/4	8	0.540 13.7	5S	…	…
1/4	8	0.540 13.7	10S	0.065 1.65	0.33 0.49
1/4	8	0.540 13.7	40S	0.088 2.24	0.43 0.63
1/4	8	0.540 13.7	80S	0.119 3.02	0.54 0.80
3/8	10	0.675 17.1	5S	…	…
3/8	10	0.675 17.1	10S	0.065 1.65	0.42 0.63
3/8	10	0.675 17.1	40S	0.091 2.31	0.57 0.84
3/8	10	0.675 17.1	80S	0.126 3.20	0.74 1.10
1/2	15	0.840 21.3	5S	0.065 1.65	0.54 0.80
1/2	15	0.840 21.3	10S	0.083 2.11	0.67 1.00
1/2	15	0.840 21.3	40S	0.109 2.77	0.85 1.27
1/2	15	0.840 21.3	80S	0.147 3.73	1.09 1.62
3/4	20	1.050 26.7	5S	0.065 1.65	0.68 1.02
3/4	20	1.050 26.7	10S	0.083 2.11	0.86 1.28
3/4	20	1.050 26.7	40S	0.113 2.87	1.13 1.69
3/4	20	1.050 26.7	80S	0.154 3.91	1.48 2.20
1	25	1.315 33.4	5S	0.065 1.65	0.87 1.29
1	25	1.315 33.4	10S	0.109 2.77	1.41 2.09
1	25	1.315 33.4	40S	0.133 3.38	1.68 2.50
1	25	1.315 33.4	80S	0.179 4.55	2.17 3.24
1 1/4	32	1.660 42.2	5S	0.065 1.65	1.11 1.65
1 1/4	32	1.660 42.2	10S	0.109 2.77	1.81 2.69
1 1/4	32	1.660 42.2	40S	0.140 3.56	2.27 3.39
1 1/4	32	1.660 42.2	80S	0.191 4.85	3.00 4.47
1 1/2	40	1.900 48.3	5S	0.065 1.65	1.28 1.90
1 1/2	40	1.900 48.3	10S	0.109 2.77	2.09 3.11
1 1/2	40	1.900 48.3	40S	0.145 3.68	2.72 4.05
1 1/2	40	1.900 48.3	80S	0.200 5.08	3.63 5.41
2	50	2.375 60.3	5S	0.065 1.65	1.61 2.39
2	50	2.375 60.3	10S	0.109 2.77	2.64 3.93
2	50	2.375 60.3	40S	0.154 3.91	3.66 5.44
2	50	2.375 60.3	80S	0.218 5.54	5.03 7.48
2 1/2	65	2.875 73	5S	0.083 2.11	2.48 3.69
2 1/2	65	2.875 73	10S	0.120 3.05	3.53 5.26
2 1/2	65	2.875 73	40S	0.203 5.16	5.80 8.63
2 1/2	65	2.875 73	80S	0.276 7.01	7.67 11.41
3	80	3.500 88.9	5S	0.083 2.11	3.03 4.52
3	80	3.500 88.9	10S	0.120 3.05	4.34 6.46
3	80	3.500 88.9	40S	0.216 5.49	7.58 11.29
3	80	3.500 88.9	80S	0.300 7.62	10.26 15.27
3 1/2	90	4.000 101.6	5S	0.083 2.11	3.48 5.18
3 1/2	90	4.000 101.6	10S	0.120 3.05	4.98 7.41
3 1/2	90	4.000 101.6	40S	0.226 5.74	9.12 13.57
3 1/2	90	4.000 101.6	80S	0.318 8.08	12.52 18.64
4	100	4.500 114.3	5S	0.083 2.11	3.92 5.84
4	100	4.500 114.3	10S	0.120 3.05	5.62 8.37
4	100	4.500 114.3	40S	0.237 6.02	10.80 16.08
4	100	4.500 114.3	80S	0.337 8.56	15.00 22.32
5	125	5.563 141.3	5S	0.109 2.77	6.36 9.46
5	125	5.563 141.3	10S	0.134 3.40	7.78 11.56
5	125	5.563 141.3	40S	0.258 6.55	14.63 21.77
5	125	5.563 141.3	80S	0.375 9.53	20.80 30.97
6	150	6.625 168.3	5S	0.109 2.77	7.59 11.31
6	150	6.625 168.3	10S	0.134 3.40	9.30 13.83
6	150	6.625 168.3	40S	0.280 7.11	18.99 28.26
6	150	6.625 168.3	80S	0.432 10.97	28.60 42.56
8	200	8.625 219.1	5S	0.109 2.77	9.92 14.78
8	200	8.625 219.1	10S	0.148 3.76	13.41 19.97
8	200	8.625 219.1	40S	0.322 8.18	28.58 42.55
8	200	8.625 219.1	80S	0.500 12.70	43.43 64.64
10	250	10.750 273.1	5S	0.134 3.40	15.21 22.61
10	250	10.750 273.1	10S	0.165 4.19	18.67 27.79
10	250	10.750 273.1	40S	0.365 9.27	40.52 60.31
10	250	10.750 273.1	80S	0.500 12.70	54.79 81.56
12	300	12.750 323.9	5S	0.156 3.96	21.00 31.25
12	300	12.750 323.9	10S	0.180 4.57	24.19 35.99
12	300	12.750 323.9	40S	0.375 9.53	49.61 73.88
12	300	12.750 323.9	80S	0.500 12.70	65.48 97.47
14	350	14.000 355.6	5S	0.156 3.96	23.09 34.34
14	350	14.000 355.6	10S	0.188 4.78	27.76 41.36
14	350	14.000 355.6	40S	0.375 9.53	54.62 81.33
14	350	14.000 355.6	80S	0.500 12.70	72.16 107.40
16	400	16.000 406.4	5S	0.165 4.19	27.93 41.56
16	400	16.000 406.4	10S	0.188 4.78	31.78 47.34
16	400	16.000 406.4	40S	0.375 9.53	62.64 93.27
16	400	16.000 406.4	80S	0.500 12.70	82.85 123.31
18	450	18.000 457	5S	0.165 4.19	31.46 46.79
18	450	18.000 457	10S	0.188 4.78	35.80 53.31
18	450	18.000 457	40S	0.375 9.53	70.65 …
18	450	18.000 457	80S	0.500 12.70	93.54 …
20	500	20.000 508	5S	0.188 4.78	39.82 59.32
20	500	20.000 508	10S	0.218 5.54	46.10 68.65
20	500	20.000 508	40S	0.375 9.53	78.67 117.15
20	500	20.000 508	80S	0.500 12.70	104.23 155.13
22	550	22.000 559	5S	0.188 4.78	43.84 65.33
22	550	22.000 559	10S	0.218 5.54	50.76 75.62
22	550	22.000 559	40S	…	…
22	550	22.000 559	80S	…	…
24	600	24.000 610	5S	0.218 5.54	55.42 82.58
24	600	24.000 610	10S	0.250 6.35	63.47 94.53
24	600	24.000 610	40S	0.375 9.53	94.71 141.12
24	600	24.000 610	80S	0.500 12.70	125.61 187.07
30	750	30.000 762	5S	0.250 6.35	79.51 118.34
30	750	30.000 762	10S	0.312 7.92	99.02 147.29
30	750	30.000 762	40S	…	…
30	750	30.000 762	80S	…	…

*Dimensions of welded and seamless stainless steel pipe and nominal weights of steel pipe, plain end.