They are widely used in industries such as oil and gas, petrochemical, chemical, and offshore applications due to their excellent corrosion resistance, high strength, and good weldability.
Duplex stainless steel: S31803 is a duplex stainless steel, which means it has a microstructure consisting of both austenite and ferrite phases. This provides it with superior mechanical properties, including higher strength and better resistance to stress corrosion cracking compared to traditional austenitic stainless steels.
Qingyan Duplex Steel S31803 Slip On Flanges can be easily slipped over the end of a pipe and then welded in place. This makes them convenient to install and suitable for applications where the flanges need to be frequently disassembled.
Corrosion resistance: Duplex Steel S31803 Slip On Flanges offer excellent corrosion resistance, particularly in aggressive environments such as chloride-containing solutions. They are resistant to pitting, crevice corrosion, and general corrosion, making them suitable for use in corrosive media.
High strength: Duplex stainless steels, including S31803, have higher strength compared to austenitic stainless steels, which makes them suitable for high-pressure and high-temperature applications.
Good weldability: Duplex Steel S31803 Slip On Flanges can be easily welded using common welding techniques such as TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding. They do not require pre-weld or post-weld heat treatment, making them convenient to fabricate and install.
|
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
Fe |
|
Duplex S31803 |
0.030 max |
2.00 max |
1.00 max |
0.030 max |
0.020 max |
22.0–23.0 |
3.0–3.5 |
4.50–6.50 |
0.14–0.20 |
63.72 min |
Wenzhou Qingyan Technology Co., Ltd. is a leading China manufacturer and supplier of stainless steel flange ,Duplex Steel Flanges and pipe fittings. We are offering the highest quality Duplex S31803/S32205 Flanges in the global market. We are producing these Flanges in multiple specializations such as class, size range, standard, surface finish, length, wall thickness, and surface finishing. We are also providing customized Duplex Steel S31803 Slip On Flanges, as per the requirements given by clients.
|
Size |
1/2" (DN10 ) to 120" (DN3000) |
|
Class |
150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc. |
|
Flange Face Type |
American Series: Flat Face(FF), Raised Face(RF), Tongue(T),
Groove(G), Female(F), Male(M), Ring Joints Face(RJ) |
|
Materal |
Stainless Steel(ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L.etc), Duplex, super Duplex(ASTM A 182–F51, F53, F55, S31803, S32205, S32550, S31254, SMO254, S32750, S32760, S32950.etc) |
|
Manufacturing process |
Cutting, Heat treatment, Die Forging/Free Forging, CNC Machining |
|
Manufacturing Standards |
ASME B16.5-2013，EN 1092-1-2007, EN 1759-1-2004，ISO 7005-1-1992，AS 2129-2000，GB/T 9112-2010, GB/T 9116-2010，HG/T 20592-2009, HG/T 20615-2009, HG/T 20623-2009，SH/T 3406-2013，GOST- AFNOR- BS- DIN |
Address
No.1188, Yongning Road, Yongzhong Street, Longwan District, Wenzhou City, Zhejiang Province, China
Tel
If you have any enquiry about quotation or cooperation, please feel free to email us at qy001@qingyan-tech.com or use the following inquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
