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Views: 3 Author: Wang Publish Time: 2024-11-28 Origin: Site
Stainless Steel 347 has slightly improved corrosion resistance over type 321 stainless steel in strongly oxidizing environments.Alloy 347 (S34700) is stabilized stainless steel which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Alloy 347 has a slightly improved corrosion resistance over other alloys of stainless steel in strongly oxidizing environments as a result of the addition of columbium (niobium) and tantalum. Columbium-tantalum carbides precipitate within the grains instead of forming at the grain boundaries. Type 347 should be considered for applications requiring intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC), or for welding under conditions which prevent a post-weld anneal.
Stainless steel is a widely used material to manufacture various products including pipes. They are divided into grades that define their characteristics. Stainless Steel 347 Pipe is one amongst them that is stabilized by adding columbium. The addition of columbium to the ASTM A312 Gr TP347 makes best suited for applications that work under high temperature and are prone to oxidation. ASTM A312 TP347 is available in the size range of ½ inches to 24 inches and can be manufactured using electric resistance weld, electric fusion weld, or can be seamless.
SA 312 TP 347 that are made using electric fusion are available in the size range of 6 inches to 100 inches. They offer good creep strength even at elevated temperatures. 347 Stainless Steel Pipe is mostly used in marine environments, marine architecture, and in equipment and laboratory furniture. SS 347 ERW pipes are made through electric resistance weld and are therefore good for heavily welded applications. They are supplied in annealed, bright annealed, pickled, cold drawn, and polished condition. SS 347 Welded Pipe have a different thickness that is defined in the different schedules.
Stainless Steel 347 Pipe is also resistant to various organic and inorganic chemicals, along with sterilized solutions. They are used in exhaust manifolds, aircraft collector rings, high temperature chemical processing equipment, and in expansion joints. SS 347 Seamless Pipe can also resist intergranular corrosion. It can also avoid chromium carbide precipitation due to the addition of columbium. 347 SS pipes are not welded with oxyacetylene welding. Our product is being used in various industries across the world and is durable with high mechanical and physical properties.
When the chemical characteristics are analyzed, it is evident that the metal is composed of chromium and molybdenum. It also contains columbium, which gives the metal anti-corrosive properties and resistance to crevice corrosion. Other chemical components are similar to those found in stainless steel 304. It has identical mechanical characteristics, yielding 205 MPa and tensile strength of 515 MPa. This tubing is available in thicknesses ranging from 0.4 mm to 30 mm and widths ranging from 1/8″ to 48″. It can be welded and seamless and is available in round, rectangular, and square forms.
JN Alloy products are made of high-quality raw materials and undergo rigorous testing to ensure no faults. At JN Alloy, we trade supply, export, and stock a high-quality assortment of stainless steel 347 pipes and our other steel products. We have a massive inventory of steel pipes and fittings and cater to domestic and foreign clients. Our products are available in various thicknesses, sizes, shapes, and forms to meet the needs of our clients, and we offer these features at a low cost.
Specifications | ASTM A312 / ASME SA312 |
Dimensional specification | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
Size | 1 / 8" NB - 24" NB |
Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
Manufacturing Shapes | Hydraulic, Round, Square, Hex, Honed |
Manufacturing Techniques | Normalized & as Rolled |
Schedule Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
End Types | Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends) |
Surface Finish | No.1, No.4, No.8 Mirror Finish, 2B |
Value Added Services | Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing |
Inspection and Test Reports | EN 10204 3.1, Mill Test Certificates, Chemical Reports, PMI Test Reports, Mechanical Reports, Third Party Inspection, NABL Approved Lab, Visual Inspection, Destructive Test and Non Destructive Test Reports |
Outside Finish | 2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Seamless Pipes, Finish as per customer Requirements |
Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
Heat Treatment | Normalized, Normalized & Tempered |
Packing of Seamless Pipes | Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests |
Specials | Sizes and Specifications other than above can be on request |
347 pipes are frequently used for fabrication of equipment that ought to be used under severe corrosive conditions. Also, they are commonly used in petroleum refining industries. Major applications include:
High temperature chemical processes
Heat exchanger tubes
High pressure steam pipes
High temperature steam and boiler pipes/tubes
Heavy duty exhaust systems
Radiant superheaters
General refinery piping
