Steel Pipe Weight Chart - Seamless & Welded

This chart gives the nominal weight of carbon and low-alloy steel pipe from NPS 1/8 to NPS 24 in the four schedules quoted most often — SCH 10, SCH 40 (also called STD up to NPS 10), SCH 80 (also called XS up to NPS 8) and SCH 160 — in kilograms per metre and kilograms per foot, calculated from ASME B36.10M outside diameters and wall thicknesses at a density of 7.85 g/cm³.

Download PDF — Steel Pipe Weight Chart

NPS	OD (mm)	SCH 10 WT mm	SCH 10 kg/m	SCH 10 kg/ft	SCH 40 / STD WT mm	SCH 40 / STD kg/m	SCH 40 / STD kg/ft	SCH 80 / XS WT mm	SCH 80 / XS kg/m	SCH 80 / XS kg/ft	SCH 160 WT mm	SCH 160 kg/m	SCH 160 kg/ft
1/8	10.3	1.24	0.28	0.084	1.73	0.37	0.111	2.41	0.47	0.143	3.23	0.56	0.172
1/4	13.7	1.65	0.49	0.149	2.24	0.63	0.193	3.02	0.80	0.242	3.91	0.94	0.288
3/8	17.1	1.65	0.63	0.192	2.31	0.84	0.257	3.20	1.10	0.334	4.19	1.33	0.407
1/2	21.3	2.11	1.00	0.304	2.77	1.27	0.386	3.73	1.62	0.493	4.78	1.95	0.594
3/4	26.7	2.11	1.28	0.390	2.87	1.69	0.514	3.91	2.20	0.670	5.56	2.90	0.884
1	33.4	2.77	2.09	0.638	3.38	2.50	0.763	4.55	3.24	0.987	6.35	4.24	1.291
1 1/4	42.2	2.77	2.69	0.821	3.56	3.39	1.034	4.85	4.47	1.362	6.35	5.61	1.711
1 1/2	48.3	2.77	3.11	0.948	3.68	4.05	1.234	5.08	5.41	1.650	7.14	7.25	2.209
2	60.3	2.77	3.93	1.198	3.91	5.44	1.657	5.54	7.48	2.280	8.74	11.11	3.387
2 1/2	73.0	3.05	5.26	1.604	5.16	8.63	2.631	7.01	11.41	3.477	9.53	14.92	4.547
3	88.9	3.05	6.46	1.968	5.49	11.29	3.442	7.62	15.27	4.656	11.13	21.35	6.506
3 1/2	101.6	3.05	7.41	2.259	5.74	13.57	4.136	8.08	18.64	5.680	11.91	26.34	8.030
4	114.3	3.05	8.37	2.551	6.02	16.08	4.900	8.56	22.32	6.804	13.49	33.54	10.222
5	141.3	3.40	11.56	3.524	6.55	21.77	6.634	9.53	30.97	9.439	15.88	49.12	14.971
6	168.3	3.40	13.83	4.214	7.11	28.26	8.615	10.97	42.56	12.973	18.26	67.57	20.594
8	219.1	3.76	19.97	6.086	8.18	42.55	12.969	12.70	64.64	19.704	23.01	111.27	33.916
10	273.1	4.19	27.79	8.469	9.27	60.31	18.384	15.09	96.02	29.266	28.58	172.34	52.530
12	323.9	4.57	35.99	10.970	10.31	79.73	24.303	17.48	132.09	40.262	33.32	238.78	72.779
14	355.6	6.35	54.69	16.670	11.13	94.55	28.819	19.05	158.11	48.192	35.71	281.72	85.867
16	406.4	6.35	62.65	19.095	12.70	123.31	37.584	21.44	203.54	62.040	40.49	365.38	111.367
18	457.2	6.35	70.60	21.520	14.27	155.88	47.511	23.83	254.68	77.628	45.24	459.62	140.092
20	508.0	6.35	78.56	23.945	15.09	183.43	55.910	26.19	311.19	94.852	50.01	564.85	172.166
24	610.0	6.35	94.53	28.813	17.48	255.43	77.854	30.96	442.11	134.755	59.54	808.27	246.359

Nominal theoretical weight for plain-end carbon steel pipe at 7.85 g/cm³. STD is identical to SCH 40 and XS identical to SCH 80 only up to the sizes noted above; above those sizes they diverge and are listed separately on the pipe schedule chart. Actual weight varies within the wall-thickness tolerance of the specification.

Source: nominal weights calculated from the ASME B36.10M outside diameters and wall thicknesses at a density of 7.85 g/cm³, theoretical for plain-end pipe.

How to read the chart

Find the nominal size down the left, then read across to the schedule you have been asked to quote. NPS is a nominal label, not a measurement — NPS 6 pipe has an outside diameter of 168.3 mm, not 152.4 mm. The outside diameter is fixed for a given nominal size, and only the wall thickness changes between schedules, which is why the weight rises with the schedule while the outside diameter stays put.

Weight per metre and weight per foot

Both columns are given because the trade works in both. Most enquiries from Europe, the Middle East and Asia are priced per tonne and the weight per metre is what converts a length into a tonnage. Enquiries from North America are frequently written in pounds per foot, which is why the chart shows kilograms per foot, a direct conversion. To go from kilograms per foot to pounds per foot, multiply by 2.20462.

Why the chart does not replace the mill certificate

The chart gives the theoretical weight of steel alone. A delivered pipe also carries its end preparation, any coupling, thread protectors and coating, and the actual wall thickness of the delivered pipe sits somewhere inside the permitted tolerance band. For a firm order, the tonnage is normally agreed against a tolerance — a common arrangement is minus 3.5% to plus 10% on theoretical weight — and settled on the certified weight at the load port.

How to read the steel pipe weight chart: nominal size, outside diameter, schedule and weight per metre — Read the nominal size down the left and across to the schedule you were given: NPS 6 schedule 40 is 28.26 kg per metre, and the outside diameter stays at 168.3 mm whatever the schedule. Source: this page’s weight table and how-to-read section.

Sizes not in the chart

The chart covers NPS 1/8 to NPS 24. Larger line pipe up to 60 inches outside diameter is produced to API 5L by LSAW and SSAW processes and is quoted by order rather than from a table, because the wall thickness is chosen per project. For those sizes, use the weight calculator with the outside diameter and wall thickness from the line specification, and see line pipe and steel pipe for the size ranges we supply.

Frequently asked questions

What does NPS mean in a steel pipe weight chart?

NPS stands for nominal pipe size. It is a label, not a measurement: the number identifies a size group, and the actual outside diameter is fixed by ASME B36.10M. NPS 6 pipe is 168.3 mm outside diameter, and NPS 12 is 323.9 mm.

Why is SCH 40 also called STD?

For nominal sizes up to NPS 10 the standard wall thickness, written STD, happens to be exactly the schedule 40 wall. Above NPS 10 the two diverge — NPS 12 STD is 9.53 mm while SCH 40 is 10.31 mm — and the names must not be used interchangeably.

How much does one metre of NPS 6 SCH 40 pipe weigh?

28.26 kg per metre, or 8.61 kg per foot. At that weight a 6-metre length is 169.6 kg, and a tonne contains about 35.4 metres.

Is the weight per foot in this chart in pounds?

No, the chart is in kilograms per foot so the whole page uses one system. To convert to pounds per foot, multiply by 2.20462 — NPS 6 SCH 40 is 8.61 kg/ft, which is 18.97 lb/ft.

Where to go next

Have a specification to price? Give us the standard or grade, the size and wall thickness, the quantity you need and the port of discharge. We come back with availability and a price.

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