ERW Pipe Weight Chart

ERW Pipe Weight Chart | ERW Steel Pipe Theoretical Weight per Meter

Understanding the ERW pipe weight is crucial for accurate cost estimation, structural design, and logistics planning. This page provides a complete ERW steel pipe weight chart covering sizes from 1/2" to 24" (21.3mm to 610mm). We include the theoretical weight per meter and per foot for Mild Steel (MS) and Carbon Steel pipes based on standard wall thicknesses (SCH 40, SCH 80). Use this guide to calculate shipping tonnage or compare material requirements for your next pipeline project.

Small Diameter ERW Pipe (1/2" – 8"):

NPS (inch)	Outer Diameter (mm)	SCH 5		SCH 10		SCH 40 / STD		SCH 80 / XS
		WT (mm)	Wt (kg/m)	WT (mm)	Wt (kg/m)	WT (mm)	Wt (kg/m)	WT (mm)	Wt (kg/m)
1/2"	21.3	1.65	0.81	2.11	1.01	2.77	1.29	3.73	1.62
3/4"	26.7	1.65	1.03	2.11	1.30	2.87	1.71	3.91	2.20
1"	33.4	1.65	1.31	2.77	2.12	3.38	2.54	4.55	3.29
1¼"	42.2	1.65	1.93	2.77	3.15	3.68	3.48	4.85	4.47
1½"	48.3	1.65	1.93	2.77	3.15	3.68	4.05	5.08	5.41
2"	60.3	1.65	2.42	2.77	3.98	3.91	5.44	5.54	7.48
2½"	73.0	—	—	—	—	5.16	8.63	7.01	11.41
3"	88.9	2.11	4.58	3.05	6.54	5.49	11.29	7.62	15.27
3½"	101.6	2.11	5.25	3.05	7.52	5.74	13.77	—	—
4"	114.3	2.11	5.25	3.05	7.52	6.02	16.07	8.56	22.32
5"	141.3	2.77	9.50	3.40	11.74	6.55	21.77	9.53	30.97
6"	168.3	2.77	11.47	3.40	14.04	7.11	28.25	10.97	42.56
8"	219.1	2.77	14.99	3.76	20.25	8.18	42.55	12.70	64.64

Wall Thickness Series Description:
● SCH 5 / SCH 10: Thin-walled pipe, suitable for low-pressure fluid transport and lightweight structures.
● SCH 40 / STD: Standard wall thickness pipe, most widely used, suitable for water and gas transport.
● SCH 80 / XS: Thick-walled pipe, suitable for high pressure and more demanding conditions.

Larger Diameter ERW Pipe (10" – 24"):

NPS (inch)	Outer Diameter (mm)	SCH 40 / STD		SCH 80 / XS
		WT (mm)	Wt (kg/m)	WT (mm)	Wt (kg/m)
10"	273.0	9.27	60.29	15.09	94.79
12"	323.8	10.31	79.62	17.48	128.07
14"	355.6	11.13	94.26	—	—
16"	406.4	12.70	122.00	—	—
18"	457.2	14.27	153.00	—	—
20"	508.0	15.09	183.00	—	—
24"	609.6	17.48	248.00	—	—

Carbon Steel ERW Pipe Weight Chart (Outer Diameter / NB / DN / Wall Thickness / Weight)

Outer Diameter (mm)	NB (inch)	DN  (mm)	Wall Thickness (mm)	Theoretical Weight  (kg/m)	Wall Thickness Series
21.3	1/2″	15	2.8	1.27	Sch 40
21.3	1/2″	15	3.7	1.62	Sch 80
26.7	3/4″	20	2.9	1.68	Sch 40
26.7	3/4″	20	3.9	2.20	Sch 80
33.4	1″	25	3.4	2.50	Sch 40
33.4	1″	25	4.6	3.24	Sch 80
42.2	1¼″	32	3.6	3.39	Sch 40
42.2	1¼″	32	4.9	4.47	Sch 80
48.3	1½″	40	3.7	4.05	Sch 40
48.3	1½″	40	5.1	5.41	Sch 80
60.3	2″	50	3.9	5.44	Sch 40
60.3	2″	50	5.5	7.48	Sch 80
73.0	2½″	65	5.2	8.63	Sch 40
73.0	2½″	65	7.0	11.41	Sch 80
88.9	3″	80	5.5	11.29	Sch 40
88.9	3″	80	7.6	15.27	Sch 80
114.3	4″	100	6.0	16.07	Sch 40
114.3	4″	100	8.6	22.32	Sch 80
141.3	5″	125	6.6	21.77	Sch 40
141.3	5″	125	9.5	30.97	Sch 80
168.3	6″	150	7.1	28.25	Sch 40
168.3	6″	150	11.0	42.56	Sch 80
219.1	8″	200	8.2	42.55	Sch 40
219.1	8″	200	12.7	64.64	Sch 80
273.0	10″	250	9.3	60.29	Sch 40
273.0	10″	250	12.7	81.43	近似 Sch 40 上延
323.8	12″	300	10.3	79.62	Sch 40
355.6	14″	350	11.1	94.26	Sch 40
406.4	16″	400	12.7	123.30	Sch 40 近似
457.2	18″	450	14.3	156.00	Sch 40 近似
508.0	20″	500	15.1	183.00	Sch 40 近似
609.6	24″	600	17.5	255.00	Sch 40 近似

Mild Steel (MS) ERW Pipe Weight Chart (IS 1239) – Indian Standard

Nominal Bore (NB)	Outer Diameter (mm)	Medium Class (B Class)		Heavy Class (C Class)
		WT (mm)	Wt (kg/m)	WT (mm)	Wt (kg/m)
15mm (½")	21.3	2.60	1.21	3.20	1.44
20mm (¾")	26.7	2.60	1.56	3.20	1.87
25mm (1")	33.4	3.20	2.41	4.00	2.94
32mm (1¼")	42.4	3.20	3.10	4.00	3.80
40mm (1½")	48.3	3.20	3.57	4.00	4.38
50mm (2")	60.3	3.60	5.03	4.50	6.19
65mm (2½")	76.1	3.60	6.43	4.50	7.93
80mm (3")	88.9	4.00	8.37	5.00	10.30
100mm (4")	114.3	4.50	12.20	5.40	14.50
150mm (6")	168.3	5.00	19.70	5.40	21.30

Frequently Asked Questions (FAQ):

Q1: How is the theoretical weight of ERW steel pipe calculated?

A:

ERW Steel Pipe Weight Calculation Formula:

For specifications not listed in the table, the following theoretical weight formula can be used:

Where: 

W = Theoretical weight per meter (kg/m), T = Wall thickness (mm), D = Outer diameter (mm)

For stainless steel pipe (density 7.93 g/cm³), the coefficient is changed to 0.02491.

Q2: What are the permissible deviations for the outer diameter, wall thickness, and length of ERW steel pipe?

A: Purchasing parties are most concerned about the difference between the actual product and the specifications. The main tolerances for ERW steel pipe are as follows:

● Outer diameter deviation: ±0.5%D ~ ±1.0%D (depending on specifications), with stricter deviations within 200mm of the pipe ends, typically ≤±1.0mm.
● Wall thickness deviation: ±0.1t ~ ±0.5mm (depending on standards), API 5L, ASTM, and other standards have different requirements.
● Length deviation: 0mm ~ +50mm (standard), special lengths can be negotiated and must be specified in the contract.
● Weight deviation: -6% ~ +10% (difference between theoretical and actual weight), the specific deviation is determined through negotiation between both parties.

Q4: Are the weight coefficients the same for ERW pipes made of materials such as Q235B, ASTM A53 Gr.B, API 5L Gr.B, and S355J2H?

A: The coefficients are the same, but there are slight differences in material density.

The coefficient 0.0246615 (metric) in the theoretical weight calculation formula for steel pipes is based on the carbon steel density of 7.85 g/cm³ and is applicable to common materials conforming to standards such as ASTM A53, ASTM A500, EN 10219, and API 5L.

If the material is stainless steel (304/316L, etc.), with a density of approximately 7.93~7.98 g/cm³, the coefficient should be changed to 0.02507. For special materials with high alloy content, it is recommended to recalculate based on the actual density on the material certificate (MTC).

Q5: The weight per meter in the weight table is a theoretical value. How much difference will there be in the actual delivered weight?

A: The deviation is usually within ±6% to ±10%. According to national standards and industry practice, when delivering based on theoretical weight, the allowable deviation between the actual weight and the theoretical weight of a single steel pipe is usually controlled within the range of -6% to +10%. Specific deviations can be clearly agreed upon by both the supplier and the buyer in the contract. 

Purchasers should note: Actual weight deviation ≠ wall thickness deviation. A heavier weight usually means a higher wall thickness deviation (beneficial for quality but increases procurement costs), while a lighter weight may indicate a lower wall thickness deviation (requiring assessment of whether design strength requirements are met).

Q5: How to determine the reliability of the weight sheet provided by the supplier?

During procurement/project acceptance, the following four items can be checked:

a. Verify the applicable standards: Confirm whether international standards such as ASTM A53, ASTM A500, EN 10219, and API 5L are clearly stated.
b. Request a Material Certificate (MTC).
c. Verify tolerances: Require the supplier to clearly indicate the wall thickness tolerance range in the weight sheet.
d. Independently verify the calculation: Use the formula kg/m = 0.0246615 × t × (OD − t) to randomly select data from the specification sheet for verification. If the deviation exceeds ±5%, raise objections with the supplier.

Read more: Carbon Steel ERW Pipe Specification or A53 SCH 40 Black Steel Pipe