duplex 2205 stainless steel pipe schedule chart

What Is Duplex 2205 Stainless Steel?

Duplex 2205 stainless steel pipe (UNS S32205 / S31803) is one of the most widely used corrosion-resistant alloys in the piping industry. With approximately twice the yield strength of 316L and superior chloride corrosion resistance, 2205 pipe is specified across oil & gas, chemical processing, desalination, and marine engineering.

 

What is the schedule of 2205 stainless steel pipe?

2205 stainless steel pipe is available in schedules 5S, 10S, 40S, 80S, 160, and XXS per ANSI/ASME B36.19. The "S" suffix denotes stainless steel pipe schedules. Schedule 40S and 80S are the most commonly stocked and used for general process piping applications. Schedule 160 is used for high-pressure service.

 

What is the standard wall thickness for 2-inch 2205 pipe?

For a 2-inch (NPS 2) 2205 duplex stainless steel pipe, the wall thickness depends on the schedule: SCH 10S = 0.109" (2.77 mm), SCH 40S = 0.154" (3.91 mm), SCH 80S = 0.218" (5.54 mm), SCH 160 = 0.344" (8.74 mm). The outside diameter of NPS 2 pipe is 2.375 inches (60.3 mm) per ASME B36.19.

 

Duplex 2205 Stainless Steel Pipe Schedule Chart

The following chart lists standard 2205 duplex stainless steel pipe dimensions per ANSI/ASME B36.19. The table covers the most commonly available schedules: 10S, 40S, 80S, and 160. Wall thicknesses are in inches and millimeters.

NPS (in)	OD (in)	OD (mm)	SCH 10S Wall (in)	SCH 10S Wall (mm)	SCH 40S Wall (in)	SCH 40S Wall (mm)	SCH 80S Wall (in)	SCH 80S Wall (mm)	SCH 160 Wall (in)	SCH 160 Wall (mm)
1/8	0.405	10.3	0.049	1.24	0.068	1.73	0.095	2.41	-	-
1/4	0.540	13.7	0.065	1.65	0.088	2.24	0.119	3.02	-	-
3/8	0.675	17.1	0.065	1.65	0.091	2.31	0.126	3.20	-	-
1/2	0.840	21.3	0.083	2.11	0.109	2.77	0.147	3.73	0.188	4.78
3/4	1.050	26.7	0.083	2.11	0.113	2.87	0.154	3.91	0.219	5.56
1	1.315	33.4	0.109	2.77	0.133	3.38	0.179	4.55	0.250	6.35
1¼	1.660	42.2	0.109	2.77	0.140	3.56	0.191	4.85	0.250	6.35
1½	1.900	48.3	0.109	2.77	0.145	3.68	0.200	5.08	0.281	7.14
2	2.375	60.3	0.109	2.77	0.154	3.91	0.218	5.54	0.344	8.74
2½	2.875	73.0	0.120	3.05	0.203	5.16	0.276	7.01	0.375	9.53
3	3.500	88.9	0.120	3.05	0.216	5.49	0.300	7.62	0.438	11.13
4	4.500	114.3	0.120	3.05	0.237	6.02	0.337	8.56	0.531	13.49
5	5.563	141.3	0.134	3.40	0.258	6.55	0.375	9.53	0.625	15.88
6	6.625	168.3	0.134	3.40	0.280	7.11	0.432	10.97	0.719	18.26
8	8.625	219.1	0.148	3.76	0.322	8.18	0.500	12.70	0.906	23.01
10	10.750	273.0	0.165	4.19	0.365	9.27	0.594	15.09	1.125	28.58
12	12.750	323.8	0.180	4.57	0.406	10.31	0.688	17.48	1.312	33.32
14	14.000	355.6	0.188	4.78	0.375	9.53	0.750	19.05	1.406	35.71
16	16.000	406.4	0.188	4.78	0.375	9.53	0.844	21.44	1.594	40.49
18	18.000	457.2	0.188	4.78	0.438	11.13	0.938	23.83	1.781	45.24
20	20.000	508.0	0.188	4.78	0.500	12.70	1.031	26.19	1.969	50.01
24	24.000	609.6	0.250	6.35	0.562	14.27	1.219	30.96	2.344	59.54

Notes: Values are based on ANSI/ASME B36.19M. For NPS 14" and above, SCH 40S wall thicknesses differ from carbon steel SCH 40. The "-" symbol indicates the schedule is not standardly produced for that size. Verify all dimensions with your supplier before final design.

 

2205 Duplex Stainless Steel Pipe Weight Chart

The weight of 2205 duplex stainless steel pipe is calculated using the density of 7.805 g/cm³ (0.282 lb/in³). The following table provides the theoretical weight per foot for standard schedules.

NPS (in)	OD (in)	SCH 10S wt (in)	SCH 10S lbs/ft	SCH 40S wt (in)	SCH 40S lbs/ft	SCH 80S wt (in)	SCH 80S lbs/ft	SCH 160 wt (in)	SCH 160 lbs/ft
1/2	0.840	0.083	0.33	0.109	0.42	0.147	0.54	0.188	0.67
3/4	1.050	0.083	0.42	0.113	0.55	0.154	0.73	0.219	0.99
1	1.315	0.109	0.61	0.133	0.73	0.179	0.95	0.250	1.28
1¼	1.660	0.109	0.79	0.140	1.00	0.191	1.34	0.250	1.71
1½	1.900	0.109	0.91	0.145	1.19	0.200	1.61	0.281	2.20
2	2.375	0.109	1.15	0.154	1.61	0.218	2.22	0.344	3.42
2½	2.875	0.120	1.50	0.203	2.49	0.276	3.35	0.375	4.50
3	3.500	0.120	1.84	0.216	3.26	0.300	4.48	0.438	6.47
4	4.500	0.120	2.38	0.237	4.69	0.337	6.61	0.531	10.32
5	5.563	0.134	3.33	0.258	6.39	0.375	9.20	0.625	15.21
6	6.625	0.134	3.98	0.280	8.29	0.432	12.67	0.719	20.93
8	8.625	0.148	5.55	0.322	12.04	0.500	18.63	0.906	33.30
10	10.750	0.165	7.63	0.365	16.80	0.594	27.13	1.125	50.93
12	12.750	0.180	9.80	0.406	22.04	0.688	37.08	1.312	70.14
14	14.000	0.188	10.50	0.375	20.78	0.750	41.39	1.406	76.94
16	16.000	0.188	12.03	0.375	23.89	0.844	53.51	1.594	100.41
18	18.000	0.188	13.56	0.438	31.51	0.938	67.13	1.781	126.72
20	20.000	0.188	15.09	0.500	40.10	1.031	82.42	1.969	156.89
24	24.000	0.250	24.04	0.562	53.95	1.219	116.53	2.344	223.42

 

2205 pipe Weight Calculation Formula

Pipe Weight Formula (Unit: Feet)

W = (OD − t) × t × 10.68 × Density Factor

Where:

W = Weight per foot (lbs/ft)

OD = Outside diameter (inches)

t = Wall thickness (inches)

Density Factor = 0.282 lb/in³ (for 2205 duplex stainless steel)

10.68 = Conversion constant (π × 12 in/ft)

Quick weight estimation: For 2205 pipe, the formula can be simplified to: W (lbs/ft) = (OD − t) × t × 3.01. The value obtained from this formula is an approximation suitable for preliminary design.

 

 Detailed Dimensional Data (NPS 1/8" – 12")

The following table provides the most frequently referenced 2205 duplex stainless steel pipe dimensions, including inside diameter (ID) calculated from OD minus 2× wall thickness.

NPS	Schedule	OD (in)	Wall (in)	ID (in)	Wall (mm)	ID (mm)	lbs/ft	kg/m
1"	SCH 40S	1.315	0.133	1.049	3.38	26.6	1.68	2.50
1"	SCH 80S	1.315	0.179	0.957	4.55	24.3	2.17	3.23
1"	SCH 160	1.315	0.250	0.815	6.35	20.7	2.85	4.24
2"	SCH 40S	2.375	0.154	2.067	3.91	52.5	3.66	5.44
2"	SCH 80S	2.375	0.218	1.939	5.54	49.2	5.03	7.48
2"	SCH 160	2.375	0.344	1.687	8.74	42.8	7.47	11.11
3"	SCH 40S	3.500	0.216	3.068	5.49	77.9	7.58	11.28
3"	SCH 80S	3.500	0.300	2.900	7.62	73.7	10.25	15.25
3"	SCH 160	3.500	0.438	2.624	11.13	66.7	14.40	21.42
4"	SCH 40S	4.500	0.237	4.026	6.02	102.3	10.79	16.05
4"	SCH 80S	4.500	0.337	3.826	8.56	97.2	15.02	22.34
4"	SCH 160	4.500	0.531	3.438	13.49	87.3	22.65	33.69
6"	SCH 40S	6.625	0.280	6.065	7.11	154.1	18.97	28.23
6"	SCH 80S	6.625	0.432	5.761	10.97	146.3	28.58	42.53
6"	SCH 160	6.625	0.719	5.187	18.26	131.8	46.34	68.93
8"	SCH 40S	8.625	0.322	7.981	8.18	202.7	28.55	42.47
8"	SCH 80S	8.625	0.500	7.625	12.70	193.7	43.39	64.54
8"	SCH 160	8.625	0.906	6.813	23.01	173.1	74.68	111.08
10"	SCH 40S	10.750	0.365	10.020	9.27	254.5	40.48	60.22
10"	SCH 80S	10.750	0.594	9.562	15.09	242.9	64.33
10"	SCH 160	10.750	1.125	8.500	28.58	215.9	116.00	172.60
12"	SCH 40S	12.750	0.406	11.938	10.31	303.2	53.16	79.06
12"	SCH 80S	12.750	0.688	11.374	17.48	288.9	88.63	131.80
12"	SCH 160	12.750	1.312	10.126	33.32	257.2	160.27	238.33

 

Can I use Schedule 40S 2205 pipe instead of Schedule 80S 316L pipe?

In many cases, yes. Because 2205 has approximately 2.6 times the yield strength of 316L, a Schedule 40S 2205 pipe can provide equivalent or higher pressure capacity than a Schedule 80S 316L pipe, while reducing weight by 30-40%. However, this substitution must be verified by a qualified engineer using the applicable design code (ASME B31.3, etc.), considering all service conditions including temperature, corrosion allowance, and flange compatibility. 

 

What is the maximum service temperature for 2205 duplex stainless steel piping?

The maximum continuous service temperature for 2205 duplex stainless steel piping is typically 600°F (315°C). Prolonged exposure to temperatures above this limit may lead to the precipitation of intermetallic phases (such as sigma, chi, and alpha-prime phases), thereby reducing the material's toughness and corrosion resistance. For sour service applications compliant with NACE MR0175 standards, the upper temperature limit is 450°F (232°C). Always verify temperature limits against design specifications and information provided by the material supplier.

 

Duplex 2205 Stainless Steel Supplier

GNEE provides Duplex 2205 stainless steel pipes (UNS S31803/S32205, EN 1.4462) manufactured according to ASTM A790 / ASME SA790 standards, available in seamless and welded types. Gnee Steel (Tianjin) Co., Ltd. We supply pipe sizes from OD 6 mm to 610 mm, wall thicknesses from 0.5 mm to 50 mm, and schedules including SCH10S, SCH40S, SCH80S, and SCH160. Each batch is tested with PMI, chemical composition analysis, tensile/yield strength testing, hydrostatic testing, ultrasonic inspection, and dimensional inspection, with EN 10204 3.1 MTC and heat number traceability provided. GNEE supports customized solutions for offshore, chemical processing, seawater desalination, and high-pressure piping projects.

Duplex 2205 Stainless Steel Pipe specification

Product Form	Size Range (Metric/NPS)	Wall Thickness (WT)	Standard
Seamless Pipe	NPS 1/8" – 24"	Sch 5S – Sch 160	ASTM A790
Welded Pipe	NPS 6" – 60"	Sch 5S – Sch 80	ASTM A790 / A928
Heat Exchanger Tube	OD 6mm – 114.3mm	0.5mm – 6.0mm	ASTM A789
Instrumentation Tube	OD 1/8" – 1"	0.5mm – 2.5mm	ASTM A789
Large OD Welded Pipe	NPS 26" – 120"	Up to 50mm	ASTM A928

Inquiry List

Product Form: Seamless pipe
Standard: ASTM A790
Specification: [e.g., NPS 3" Schedule 40S]
Length: [e.g., 6000mm fixed length]
Quantity: [e.g., 500 meters]
Surface Finish: Pickled and Passivated (AP)
Certificate: Material Test Certificate (MTC) per EN 10204 3.1
Please provide your best price, delivery lead time, and current stock status.

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Please find attached the Mill Test Certificate for the 2205 stainless steel pipes we exported. Kindly review it.