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Views: 1 Author: Wang Publish Time: 2024-08-14 Origin: Site
Stainless steel 317L (UNS S31703) is a molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Alloy 304. In addition, Alloy 317L offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steels. It is a low carbon or "L" grade which provides resistance to sensitization during welding and other thermal processes.
Machining stainless steel grade 317L requires low speeds and constant feeds to reduce its tendency to work harden. This steel is tougher than grade 304 stainless steel with a long stringy chip; however, using chip breakers is recommended. Welding can be performed using most of the conventional fusion and resistance methods. Oxyacetylene welding should be avoided. AWSE/ER 317L filler metal is recommended.
Shearing, stamping, heading and drawing are possible with grade alloy 317L stainless steel, and post-work annealing is recommended to eliminate internal stresses. Annealing is performed at 1010-1121°C (1850-2050°F), which should be followed by rapid cooling. Conventional hot working processes can be performed. The material should be heated to 1149-1260°C (2100-2300°F); however, it should not be heated below 927°C (1700°F). To optimize corrosion resistance, a post-work annealing is recommended.
Alloy 317L (UNS S31703) is a lowcarbon corrosion resistant austenitic chromium-nickel-molybdenum stainless steel. The high levels of these elements assure the alloy has superior chloride pitting and general corrosion resistance to the conventional 304/304L and 316/316L grades. The alloy provides improved resistance relative to 316L in strongly corrosive environments containing sulfurous media, chlorides, and other halides. Alloy 317L is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will harden due to cold working. Alloy 317L can be easily welded and processed by standard shop fabrication practices.
JN Alloy is one of the well-known distributor and dealer of SS 317L Flanges, which has enabled stainless steels to compete with nickel and titanium – based alloys for service in the most demanding conditions. 
Generally speaking it is the ability to withstand attack by highly corrosive chemicals that creates such a high level of demand for our Stainless Steel 317L Slip On Flanges within the chemical and petrochemical industrial sectors. Methods are being developed to remove potential pollutants in these Stainless Steel 317L Threaded Flanges from processes as well as products. Changing national interests among oil – producing countries are affecting sources of raw crude supplies of our Stainless Steel 317L Weld Neck Flanges. One result of these changes is a growing emphasis on materials engineering, and greater interest is being shown in the high – alloy, corrosion resistant steels, especially these Stainless Steel DIN 1.4438 Blind Flanges, to cope with a wide variety of raw crudes. Our AISI 317L Socket Weld Flanges containing 16 % – 26 % Chromium and 6 % – 22 % Nickel. These Stainless Steel 317L Lapjoint Flanges are non – magnetic and have excellent corrosion resistance, and are not hardenable by heat treatment. However, our Stainless Steel 317L Ring Joint Type Flanges can develop high strength even from light cold working. These Stainless Steel 317L Spectacle Blind Flanges have excellent weldability and formability, notable cryogenic properties, and a good hygiene factor.
Standard | ASTM A182 / ASME SA182 |
Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
Size | 1/2" (15 NB) to 48" (1200NB) |
Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
The slip-on flange is a ring (with or without a hub) placed over the pipe’s end. The flange face extends from the end of the pipe by a sufficient distance to apply a welded bead to the inner diameter. As the name suggests, these flanges slip over a pipe and are known as slip-on flanges.
Weld neck flange is also known as a high-neck flange or tapered hub flange. The weld neck flange has a neck that can properly transfer the pipe tension. It also helps to reduce the pressure gathered at the bottom of the flange. It is compatible with pipelines that operate at low or high temperatures and withstand high pressure.
The socket weld flanges are connected on the outside just by a fillet weld. It is often not advisable for critical services. These are useful for the small-bore lines in your system. The static strength is equivalent to slip-on flanges, but the fatigue strength is 50 percent higher than double-welded slip-on flanges. Often used as an alternative to weld necks when space is a constraint.
The production of blind flanges happens without a bore and is utilized to blank off the ends of pressure vessel openings, valves, and pipes. If you look from the point of view of bolt loading and internal pressure, the most overstressed flange types are blind flanges which are quite bigger.
Lap joint flanges are useful with stub ends when the pipe is made of expensive material. E.g., a carbon steel flange can be added to the stainless steel pipe system as the flanges do not come into contact with the substance in the pipe.
Threaded flanges look identical to slip-on flanges, but the key difference is that the threaded flange is bored out to match the inside diameter of the particular pipe. The threaded flange is a type of flange that has taper pipe threads in its bore conforming to ASME B1.20.1 and is helpful in piping systems.
Manufacturing industries: For instance, the presence of flanges in injection molding machines, plays a vital role in the mold-making process. They provide secure connections at the joints of, equipment like hydraulic and pneumatic systems and mold attachment. Proper connections allow for control and facilitate precise alignments among other factors.
Power Generation: In power generation facilities like hydroelectric and power plants, flanges serve critical purposes. They guarantee strong and secure connections at the joints of pumps, turbines, and other available machinery.
Water and Wastewater Treatment: Flanges are extensively used in sewer systems and water treatment plants. They establish connections between, pumps, pipelines, and other equipment.
In summary, flanges are an essential component of many industries and applications. The type of flange used will depend on the application’, including pressure, temperature, and material compatibility. It is important to choose the right type of flange and ensure proper installation and maintenance to ensure the safety and efficiency of the system.If you need any style of flange, please contact us and JN Alloy will tailor it for you.
