ASTM A182 F317/317L 1.4449/1.4438 Stainless Steel Blind Flange
Overview:
The F317/317L blind flange is a crucial component used mainly in pipe systems to terminate a pipe's end, providing a pressure-tight seal. Made from the austenitic stainless steel alloy 317 and its low-carbon variant 317L, this blind flange offers excellent corrosion resistance, particularly in hostile environments due to the presence of chromium, nickel, and molybdenum in its composition. This enhanced corrosion resistance makes it ideal for chemical processing, petrochemical applications, and other industries involving aggressive media.
The design features of the blind flange allow it to withstand high pressure and temperature, ensuring structural integrity in demanding conditions. Typically, these flanges comply with industry standards such as ASME/ANSI, which dictate dimensions, pressure ratings, and material specifications, ensuring compatibility and safety for various applications.
Installation of a blind flange is straightforward, requiring the use of bolts and gaskets to ensure a leak-proof seal. Its absence of a central opening eliminates the risk of pressure release at the closed end, making it a suitable choice for isolating sections of piping for maintenance or during system modifications.
Additionally, F317/317L blind flanges are available in various classifications based on their pressure rating (such as 150, 300, 600, and 1500 lbs), allowing flexibility for engineers and designers when selecting components for their systems. The flanges can be manufactured in different sizes and face configurations, including raised face, flat face, and ring-type joint, accommodating various installation needs.
Specification:
| Standard |
ASTM A182/ASME SA182 |
| Material |
F317/317L; 1.4449/1.4438 |
| Type |
Blind Flange |
| Flange Face |
Raised Face/Flat Face/Ring Joint |
| Size |
1/2"-48"(DN15-DN1200) or custom size |
| Thickness |
SCH10S-XXS |
| Packing |
Plywood case/Pallet |
| Mill Test Certificate |
EN10204 3.1/EN10204 3.2 |
Chemical Composition:
|
Grade
|
C
|
Mn
|
P
|
S
|
Si
|
Ni
|
Cr
|
Mo
|
|
F317
|
0.08 max
|
2.00 max
|
0.045 max
|
0.03 max
|
1.00 max
|
11.0-15.0
|
18.0-20.0
|
3.0-4.0
|
|
F317L
|
0.03 max
|
2.00 max
|
0.045 max
|
0.03 max
|
1.00 max
|
11.0-15.0
|
18.0-20.0
|
3.0-4.0
|
Mechanical Properties:
|
Grade
|
Tensile Strength
min, ksi [MPa]
|
Yield Strength
min, ksi [MPa]
|
Elongation in 2 in.
[50 mm] or 4D,
min, %
|
Reduction of
Area, min, %
|
|
F317
|
75 [515]
|
30 [205]
|
30
|
50
|
|
F317L
|
70 [485]
|
25 [170]
|
30
|
50
|
Application:
1. Chemical Processing: The 317/317L blind flange is widely used in chemical plants for handling corrosive substances, acids, and solvents. It offers excellent resistance to a wide range of corrosive chemicals, making it suitable for applications such as chemical reactors, storage tanks, and pipelines.
2. Petrochemical Industry: In the petrochemical industry, the 317/317L blind flange finds application in refineries, offshore platforms, and oil and gas processing facilities. It is utilized in pipelines, heat exchangers, and equipment exposed to corrosive environments and high temperatures.
3. Pharmaceutical and Biotechnology: The 317/317L blind flange is employed in pharmaceutical and biotech industries that require sterile and corrosion-resistant equipment. It is used in processes such as drug manufacturing, bioreactors, and sterile processing systems.
4. Food and Beverage: The food and beverage industry relies on the 317/317L blind flange for its corrosion resistance and sanitary properties. It is utilized in processing equipment, storage tanks, and piping systems for the production of food, beverage, and dairy products.
5. Power Generation: In power plants, particularly those employing fossil fuels, the 317/317L blind flange is used for its resistance to high-temperature environments and corrosive flue gases. It can be found in boiler systems, gas turbines, and heat exchangers.
6. Desalination Plants: The 317/317L blind flange is suitable for desalination plants where it withstands the harsh conditions of saltwater environments and high chloride levels. It is used in pipeline systems, pumps, and equipment involved in the desalination process.
