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Product Details

Name: SS31803 Duplex Steel Pipe

Size：1/2” NB - 8” NB（Seamless ）；6” NB - 24” NB（Welded ）

Material: Duplex Steel

Type：Seamless / ERW / Welded / Fabricated / CDW

Thickness range: 0.5-45mm

Surface Treatment: Polishing, Hairline, Pickled, etc.

Finished condition: Round, Square, Rectangular, Coil，U Tube

Application: Petrochemical, Oil & Gas； Geothermal, Mining；Chemical Process, Pharmaceutical, Biomass；Sea Water, Water Desalination； LNG (Liquefied Natural Gas), Nuclear Power, Solar Power。

Model number:

Original: Wenzhou,Zhejiang

Standard: ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789

Brand:

Technics:

Package: Packed in woven bag, or put in wooden case

Price:

Delivery: Accord Quantity

Certificate:

Production ability:

Product Detail

Duplex Steel UNS S31803 Pipes demonstrates good fatigue strength, as well as outstanding resistance to stress corrosion cracking, crevice, pitting, erosion, and general corrosion in severe environments. Duplex Steel UNS S31803 Tubes generally has a higher corrosion resistance compared to the austenite steels.

Moreover, the two-phase microstructure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventional stainless steels.

Table of Content：

1. Specification of S31803 Duplex Steel Pipe

2. Applications of S31803 Duplex Steel Pipe

3. Equivalent Grades For S31803 Duplex Stainless Steel Pipe

4. CHEMICAL COMPOSITION OF S31803 Duplex Steel Pipe

5. MECHANICAL PROPERTIES OF S31803 Duplex Steel Pipe

6. Dimensional Tolerance of S31803 Duplex Steel Pipe

7. UNS S31803 Duplex Steel Pipe Size Chart

8. Duplex Steel UNS S31803 Pipe Pressure Rating

9. S31803 Duplex Steel Pipe price list

Specification of S31803 Duplex Steel Pipe

Standard	ASTM A790 / ASME SA790, ASTM A789 / ASME SA A789
Grade	S31803
Type	Seamless / ERW / Welded / Fabricated / CDW
Length	Single Random Length, Double Random Length And Customize Size.
End	Plain End, Bevelled End, Threaded

Applications of S31803 Duplex Steel Pipe

l Heat Exchangers

l Instrumentation

l Hydraulic & Pneumatic system

l Nuclear Power Plants

l Automotive industries

l Aerospace

l Medical

l Pharmaceutical

l Oil coolers

l Pre-heater

l Condenser

l LNG

l Pulp and paper

l Offshore construction

l Food and pharmaceutical processing

l Desalination and waste water projects

l Electrical Submersible Pump

Equivalent Grades For S31803 Duplex Stainless Steel Pipe

STANDARD	UNS	WERKSTOFF NR.
Duplex S31803	S31803	1.4462

CHEMICAL COMPOSITION OF S31803 Duplex Steel Pipe

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	N	Fe
Duplex Steel S31803	0.030 max	1.20 max	0.80 max	0.035 max	0.020 max	24.00 – 26.00	3.00 – 5.00	6.00 – 8.00	0.24 – 0.32	58.095 min

MECHANICAL PROPERTIES OF S31803 Duplex Steel Pipe

Grades	Density (g/cm 3)	Density (lb/in 3)	Melting Point (°C)	Melting Point (°F)
S31803	7.805	0.285	1420 – 1465	2588 – 2669

Dimensional Tolerance of S31803 Duplex Steel Pipe

Nominal pipe size up to 4 = ± 0.79 mm \| 5 thru 8 = + 1.58 mm / - 0.79 mm 10 thru 18 = + 2.37 mm / - 0.79 mm \| 20 thru 24 = + 3.18 mm / - 0.79 mm
Wall Thickness All Diameters = - 12.5% + tolerance not specified	Length + 6.40 mm / - 0 mm	Weight Weight = + 10% / - 1.5%

UNS S31803 Duplex Steel Pipe Size Chart

Wall	Sizes ( O.D.)
.010	1/16" , 1/8" , 3/16"
.020	1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8"
.012	1/8"
.016	1/8" , 3/16"
.028	1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2"
.035	1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 7/16" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4"
.049	3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/8" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4"
.065	1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 3/4" , 2" , 2 1/2" , 3"
.083	1/4" , 3/8" , 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 7/8" , 2" , 2 1/2" ,3"
.095	1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2"
.109	1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2"
.120	1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3"
.125	3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4"
.134	1"
.250	3"
.375	3 1/2"

Duplex Steel UNS S31803 Pipe Pressure Rating

Tube O.D. (in.)	Wall Thickness of Tube (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
	Working Pressure (psig)
1/8	7900	10100
1/4	3700	4800	7000	9500
5/16		3700	5400	7300
3/8		3100	4400	6100
1/2		2300	3200	4400
3/4			2200	3000	4000	4600
1				2200	2900	3400	3900	4300