Stainless Steel Pipe Dimensions and Weight Chart

Stainless steel pipe dimensions are defined by nominal pipe size (NPS), outside diameter (OD) and wall thickness (WT), and the weight per meter follows from those three values. This guide gives a stainless steel pipe size chart with OD, wall thickness and weight per meter, the weight by schedule (Sch 5S, 10S, 40S, 80S) from ASME B36.19M, a weight formula with a worked example, a kg/m to lb/ft conversion table and tolerance data.

For example, an NPS 4 Sch 40S pipe (OD 114.30 mm, WT 6.02 mm) weighs about 16.24 kg/m (10.91 lb/ft), calculated for 304 stainless steel.

1. Stainless Steel Pipe Dimensions and Weight Chart (Sch 40S)

Table 1 is a stainless steel pipe size chart and weight chart for round pipe in Sch 40S, listing OD, wall thickness, inside diameter and theoretical weight per meter. Dimensions follow ASME B36.19M. Weights are calculated for 304 stainless steel (density 7.93 g/cm³)

Table 1: Round stainless steel pipe dimensions and weight (Sch 40S)

NPS (inches)	Outside diameter (OD)	Wall thickness (WT)	Inner diameter (ID)	Theoretical weight (kg/m²)
1/4"	13.72 mm	2.24 mm	9.24 mm	0.64
1/2"	21.34 mm	2.77 mm	15.80 mm	1.28
3/4"	26.67 mm	2.87 mm	20.93 mm	1.70
1"	33.40 mm	3.38 mm	26.64 mm	2.53
1 1/2"	48.26 mm	3.68 mm	40.90 mm	4.09
2"	60.33 mm	3.91 mm	52.51 mm	5.50
3"	88.90 mm	5.49 mm	77.92 mm	11.41
4"	114.30 mm	6.02 mm	102.26 mm	16.24
5"	141.30 mm	6.55 mm	128.20 mm	21.99
6"	168.28 mm	7.11 mm	154.06 mm	28.55
8"	219.08 mm	8.18 mm	202.72 mm	42.99
10"	273.05 mm	9.27 mm	254.51 mm	60.92
12"	323.85 mm	9.53 mm	304.79 mm	74.63

2. Stainless Steel Pipe Weight per Meter by Schedule (ASME B36.19M Sch 5S–80S)

Table 2 gives wall thickness and theoretical weight per meter for Sch 5S, 10S, 40S and 80S across NPS 1/2"–12". Wall thicknesses follow ASME B36.19M nominal values; weights are calculated with the formula in Section 3 (density 7.93 g/cm³). The “S” suffix distinguishes B36.19M schedules from ASME B36.10M schedules. For wall thickness in inches and guidance on choosing a schedule, see our Stainless Steel Pipe Schedule Chart.

Table 2: Wall thickness and weight per meter by schedule (ASME B36.19M)

NPS	OD (mm)	5S WT (mm)	5S kg/m	10S WT (mm)	10S kg/m	40S WT (mm)	40S kg/m	80S WT (mm)	80S kg/m
1/2"	21.34	1.65	0.81	2.11	1.01	2.77	1.28	3.73	1.64
3/4"	26.67	1.65	1.03	2.11	1.29	2.87	1.70	3.91	2.22
1"	33.40	1.65	1.31	2.77	2.11	3.38	2.53	4.55	3.27
1 1/2"	48.26	1.65	1.92	2.77	3.14	3.68	4.09	5.08	5.47
2"	60.33	1.65	2.41	2.77	3.97	3.91	5.50	5.54	7.56
3"	88.90	2.11	4.56	3.05	6.52	5.49	11.41	7.62	15.43
4"	114.30	2.11	5.90	3.05	8.45	6.02	16.24	8.56	22.55
5"	141.30	2.77	9.56	3.40	11.68	6.55	21.99	9.53	31.29
6"	168.28	2.77	11.42	3.40	13.97	7.11	28.55	10.97	43.00
8"	219.08	2.77	14.93	3.76	20.17	8.18	42.99	12.70	65.31
10"	273.05	3.40	22.84	4.19	28.07	9.27	60.92	12.70	82.37
12"	323.85	3.96	31.57	4.57	36.35	9.53	74.63	12.70	98.46

3. Stainless Steel Pipe Weight per Meter Formula

W = π × (OD − WT) × WT × ρ × 10⁻³

• W: weight per meter, kg/m
• OD: outside diameter, mm
• WT: wall thickness, mm
• ρ: material density, g/cm³
• 10⁻³: unit conversion factor, so the result is in kg/m

For 304 stainless steel, ρ = 7.93 g/cm³, so W = π × (OD − WT) × WT × 7.93 × 10⁻³. All tables in this article use this value. For other grades, use the density of that grade, or multiply the result by ρ / 7.93. For example, 316/316L is commonly quoted at about 7.98 g/cm³, which gives roughly 0.6% more weight.

Example: NPS 4 Sch 40S stainless steel pipe (OD = 114.30 mm, WT = 6.02 mm):

W = π × (114.30 − 6.02) × 6.02 × 7.93 × 10⁻³
W = π × 108.28 × 6.02 × 7.93 × 10⁻³
W ≈ 16.24 kg/m

This matches the NPS 4" value in Table 1. A 6 m length weighs about 97.4 kg.

Notes:
Table values are theoretical plain-end weights. Actual weight varies with the wall-thickness tolerance of the governing product standard, and may differ slightly from printed mass columns in B36.19M or mill catalogs. 
Regular length: welded pipe 6 m, seamless pipe 5–7 m; other lengths on request. 

3.1 Weight Unit Conversion (kg/m ↔ lb/ft)

For customers working in imperial units, Table 3 converts the Sch 40S weights from Table 1 (1 kg/m = 0.672 lb/ft):

Table 3: kg/m to lb/ft conversion (Sch 40S)

NPS	Weight (kg/m)	Weight (lb/ft)
1/4"	0.64	0.43
1/2"	1.28	0.86
3/4"	1.70	1.14
1"	2.53	1.70
1 1/2"	4.09	2.75
2"	5.50	3.70
3"	11.41	7.67
4"	16.24	10.91
5"	21.99	14.78
6"	28.55	19.19
8"	42.99	28.89
10"	60.92	40.94
12"	74.63	50.15

4. Stainless Steel Pipe and Tube Sizes and Grades

 

Our supply range for the stainless steel pipe and tube:

Standards: ASTM A321, ASTM A213, ASTM A269, ASME SB677

Duplex stainless steel pipe standards: ASTM A789/ ASME SA 789. ASTM A790/ ASME SA 790

Material: AISI 304, 304L, 316, 316L

Outer Diameter: 5.8 – 508mm,

Wall Thickness: 0.3 – 50mm

4.1 Stainless Steel Pipe Tolerance Chart

Standard	Out Diameter（mm）		Wall Thickness（%）			Cutting Length（mm）
	Sizes	Tolerance	Sizes(mm)	Tolerance		Sizes	Tolerance
GB/T14975-02	10~30	+0.30/-0.30	S≤3	+14/-14	1.0~3.0	+15/0
	30~50	+0.40/-0.40	S＞3	+12/-10
	D＞50	+0.9%/-0.9%
GB/T14976-02	6~10	+0.20/-0.20	0.5~1.0	+0.15/-0.15mm		+15/0
	10~30	+0.30/-0.30	1.0~3.0	+14/-14
	30~50	+0.40/-0.40	＞3	+12/-10
	D＞50	+0.9%/-0.9%		+12.5/-12.5
GB13296-91	≤140	+1.25%/-1.25%	≤10	+15/-15
	＞140	+1%/-1%	＞10
ASTM213	D＜25.4	+0.10/-0.10	D＜38.1	+20/0	D＜50.8	+3.0/0
	25.4~38.1	+0.15/-0.15
	38.1~50.8	+0.20/-0.20
	50.8~63.5	+0.25/-0.25	D≥38.1	+22/0	D≥50.8	+5.0/0
	63.5~76.2	+0.30/-0.30
	76.2~101.6	+0.38/-0.38
	101.6~190.5	+0.38/-0.64
	190.5~228.6	+0.38/-1.14
ASTM A269	D＜12.7	+0.13/-0.13		+15/-15		+3.2/0
	12.7~38.1			+10/-10
	38.1~88.9	+0.25/-0.25				+4.8/0
	88.9~139.7	+0.38/-0.38
	139.7~203.2	+0.76/-0.76
ASTM A312	10.29~48.26	+0.40/-0.80		+12.5/-12.5		+6.0/0
	48.26~114.30	+0.80/-0.80
	114.30~219.08	+1.60 /-0.80
	219.08~457.20	+2.40/-0.80
ASTM A789	D≤12.7	+0.13/-0.13		+15/-15		+3.0/0
	12.7~38.1			+10/-10
	38.1~88.9	+0.25/-0.25				+5.0/0
	88.9~139.7	+0.38/-0.38
	139.7~203.2	+0.76/-0.76
ASTM A790	10.29~48.26	+0.40/-0.80
	48.26~114.3	+0.80/-0.80
	114.3~219.08	+1.60/-0.80
	219.08~457.20	+2.40/-0.80
EN17455-02	10~30	+0.30/-0.30	S≤3	+14/-14	1.0~3.0	+15.0/0
	30~50	+4.00/-4.00	S＞3	+12/-10
	D＞50	+9%/-9%
EN17456-02	6~10	+0.20/-0.20	0.5~1.0	+0.15/-0.15		+15.0/0
	10~30	+0.30/-0.30	1.0~3	+14/-14
	30~50	+4.00/-4.00	S＞3	+12/-10
	D＞50	+0.9%/-0.9%

5. Common Industry Standards

 

Stainless steel pipe dimensions and weight calculations follow unified international industrial standards to ensure global compatibility and interchangeability. The most widely recognized specifications include:

ASME B36.19: Standard specification for stainless steel pipe dimensions, covering nominal sizes, outer diameter tolerances and schedule wall thicknesses

ASTM A312 / A240: Core material standards for stainless steel seamless and welded pipes

ANSI/ASME B36.10M: General dimensional standard for seamless and welded steel pipes

These standards unify key parameters including nominal pipe size (NPS), outer diameter (OD), wall thickness (WT), schedule grade and theoretical weight, supporting standardized installation and engineering design worldwide.

6. Main Applications Based on Specifications

 Schedule is a wall-thickness designation, not a working-pressure rating. The allowable pressure of a pipe depends on grade, OD, wall thickness, design temperature, weld type, corrosion allowance and the applicable code, so confirm it by design calculation. 

The typical uses below are guidance only:

Sch 5S / 10S (thin wall): lighter, commonly specified where design loads are low, such as food processing lines, medical equipment piping and municipal water supply

Sch 40S (standard wall): a general-purpose choice for chemical pipelines, heat exchange systems and conventional industrial process piping.

Sch 80S or heavier (thick wall): used where higher design pressure, temperature, corrosion allowance or mechanical strength is needed, such as petrochemical refining, energy projects and pressure vessel piping. Schedules heavier than 80S (such as Sch 160) are defined in ASME B36.10M.

 7. FAQs

Q1: What does Sch 40S mean, and how does it differ from Sch 40?

A: Sch 40S is the standard-wall schedule in the ASME B36.19M stainless steel series. The “S” separates it from Sch 40 in ASME B36.10M, and the wall thicknesses can differ for some sizes, so check your NPS in Table 2. 

Q2: What are common stainless steel grades for pipes?

A: 304, 304L, 316 and 316L are the most widely used for corrosion resistance and general industrial service.

Q3: What is the difference between pipe and tube?

A: Pipe follows NPS and schedule standards for pressure piping; tube uses exact OD/WT sizes for precision and structural applications.

Q4: What does ASME B36.19M specify?

A: It defines standard dimensions (NPS and OD), schedule wall thicknesses (5S, 10S, 40S, 80S) and nominal weights for welded and seamless wrought stainless steel pipe.

Q5: How do I calculate stainless steel pipe weight per meter?

A: Use W = π × (OD − WT) × WT × 7.93 × 10⁻³ for 304, with OD and WT in mm and W in kg/m. See Section 3 for the worked example.

Permanent Steel Manufacturing Co.,Ltd (PMC) is a professional and experienced supplier of seamless steel pipes with rich industry experience, strict quality control and complete international certifications. We provide high-quality products and professional services for global customers. For any inquiries or cooperation, please feel free to contact us.

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