ASTM A182 F317L / UNS S31703 / 1.4449 Forged Stainless Steel Blind Flange

Stainless Steel 317/317L is a type of austenitic stainless steel that contains a higher percentage of molybdenum compared to other stainless steel grades, such as SS 304 or SS 316. The increased molybdenum content enhances its corrosion resistance. The excellent resistance to corrosion in a variety of environments, including acidic, alkaline, and chloride-rich conditions. especially against chlorides and other aggressive chemicals. This makes SS 317 steel flanges suitable for applications in industries such as chemical processing, petrochemical, and pulp and paper.

Equivalent Grade of ASTM A182 F317L Stainless Steel Flange

ASTM A182 F317L Stainless Steel Flange

Chemical Composition of ASTM A182 F317L Stainless Steel Flange

Mechanical Strength of ASTM A182 F317L Stainless Steel Flange

ASTM A182 F317L Stainless Steel Flange

ASTM A182 F317L Stainless Steel Flange Pressure Rating

Various Kinds of Flanges we can supply as below
1. Slip-on Flanges.
Slip-on Flanges have a lower initial cost than welding neck flanges because they require less accuracy in cutting pipe to length, and they provide a greater ease of alignment in assembly. However, their calculated strength under internal pressure is approximately 2/3's the strength of welding neck flanges, and their life under fatigue is 1/3 shorter. Slip-on Flanges are limited to 1/2" to 2½" sizes in 1500lbs standard.
2. Threaded Flanges
Threaded Flanges are used for special applications. They can be assembled without welding and can be used in extremely high pressure services--at or near atmospheric pressure--where alloy steel is essential for strength. Threaded flanges are not suited for conditions involving temperature or bending stresses, or under cyclic conditions where leakage through the threads may occur.
3. Weld Neck Flanges
Weld Neck Flanges have a long tapered hub and gradual transition of thickness in the region of the butt weld joining them to the pipe. The tapered hub provides important reinforcement to the flange and resistance to dishing. This type of flange is preferred for severe service conditions resulting from high pressure, sub-zero or high temperatures.
4. Blind Flanges
Blind Flanges are used to blank off the ends of piping, valves and pressure vessel openings. Blind Flanges can handle high stress from internal pressure and bolt loading since the maximum stresses in the blind flange are bending stresses at the center.
5. Socket Weld Flanges
Socket Weld Flanges were developed for use on small size high pressure piping. With an internal weld, socket weld flanges are stronger and have greater fatigue strength than double welding a slip-on flange. Smooth bore conditions can be easily attained by grinding the internal weld. This flange is commonly used in chemical process piping.
6. Lap Joint Flanges
Lap Joint Flanges are used with lap joint stubs. Lap joint flanges are commonly used in carbon or low alloy steel piping systems that need to be frequently dismantled for inspection and cleaning. They should not be used at any points where severe bending stresses occur.

Application Industries