Duplex and carbon steel are usually the two most alloys that are the material of choice in the petrochemical industry. They are called ‘duplex’ as they have approximately equal proportions of ferritic and austenitic phases. This chemical composition gives it better strength, weight saving, greater corrosion resistance and a better price stability.
Unlike similar steels, duplex also displays improved resistance to localised corrosion, particularly pitting, crevice corrosion and stress corrosion cracking. Due to its ferritic qualities, it also shows very good resistance to stress corrosion cracking, as well as good ductility when compared to standard austenitic steels. In some cases, the strength of duplex stainless steel can be up to double that of the most commonly used grades of stainless steel.
In terms of applications, duplex piping products are used for a wide variety of functions such as:
• Transportation of various liquids and gases,
• Structural and mechanical components of processing plants
• Heat exchangers
• Cooling pipes
Product Name | Super Duplex Stainless Steel Pipe, Heat Transferring Tubing for Petrochemical Industry, Sea Water Treatment S2205, S31803 |
Material | Stainless Steel |
Shape | Round, Square, Rectangular, Oval, Hexagonal |
Grade | 200 Series:201/202 |
300 Series:301/302/303/304/304 L/304 N/309/309 S/310/316/316 L/321/347 | |
400 Series: 403/408/409/410/416/420/430/431/440/440A/440B/440C/439/443/444 | |
600 Series: 610/620/630 | |
900 Series: 904L | |
Specifications | Outer Diameter:12mm-813mm Thickness: 0.5-60mm Length: 5.8m, 6m, 12m (as per request) |
Surface Characteristics | NO.1,NO.2D,NO.2B,BA,NO.3,NO.4,NO.240,NO.320,NO.400,HL,NO.7,NO.8,BA/2B |
Standard | ASTM A312,A213,GB/T6893-2000,GB/T4437-2000,ASTM B210,ASTM B241,ASTM B234,JIS H4080-2006,etc |
Technique | Hot rolled,cold rolled, cold drawn, Casting,Forged,etc. |
Inspection | ISO, SGS, BV, TUV and so on. |
Tolerance | 0.01-0.15mm |
Application | Oil well pipe (casing, tubing and drill pipe, etc.), pipeline, boiler tube, mechanical structure pipe, hydraulic prop pipe, gas cylinder tube, geological tube, chemical pipe (high-pressure chemical fertilizer pipe, oil cracking pipe) and ship pipe |
Packaging | 1. cases packed in wooden cases 2. paper packaging 3. plastic packing 4. foam packaging Packaging according to customer requirements or products |
Delivery | 7-35days or according to the quantity |
Payment | L/C, T/T(Negotiable) |