A182 F91 Alloy Steel Flanges are high tensile strength, anti-corrosive, corrosive corrosion resistance and stress corrosion cracking. F91 A182 Blind Flanges are used when a new valve is being added or while adding another line onto an existing pipeline. They are placed in between two open flanges, which stop the flow through a pipe. Chrome Moly Alloy A182 F91 Flanges is useful in any industries or applications which operate equipment under high temperatures. It is ideal for environments with an elevated temperature level. A182 F91 Class 2 Flange is strong, tough and extremely ductile, which makes it durable and long lasting. It provides good oxidation resistance and good resistance to scaling in aqueous medium. SA 182 Gr F91 Socket Weld Flanges are typically provided with a flat face, raised face, or RTJ facing.
ASME SA 182 Gr F91 Slip On Flanges is very common to find these flanges today in firefighting water lines, cooling water lines, low-pressure compressed air lines, and process lines for substances such as oil, gas, steam, condenser etc. They are mainly used for fluids at low pressure or with little risk of leakage. A182 Gr F91 Threaded Flanges are often used for small diameter, high pressure requirements. It is with a hub which has published specifications that range from 1/2″ thru 24″. It is ideal for small diameter piping applications. ASTM A182 Grade F91 Flange is provided in customized and conventional flanges complying with various international products quality standard for services at severe temperature. ASTM A182 Gr F91 Flange is often used in combination or is mostly matched with the ASTM A335 alloy steel pipes.
Specification Schedule of Alloy Steel Grade F91 Flanges
| ASTM Specification | ASTM A182 , ASME SA182 |
|---|---|
| Size in inch | 1/2 inch (15 NB) to 48 inch (1200NB) |
| Standards | ANSI/ASME B16.5, B16.48, B 16.47 Series A & B, EN-1092, BS4504, BS 10, DIN |
| Class and Pressure Chart | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Chemical Properties of Alloy Steel Grade F91 Flanges
| Grade | C | Mn | Si | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| F91 | 0.15 max | 0.3-0.6 | 0.5-1.0 | 0.03 | 0.03 | 8-10 | 0.9-1.1 |
Mechanical Properties of Alloy Steel Grade F91 Flanges
| Grade | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|
| F91 | 380 | 585 | 20 % |
Equivalent Standard of Alloy Steel Grade F91 Flanges
| STANDARD | UNS | DIN WERKSTOFF NR. | DIN |
|---|---|---|---|
| Alloy F91 | – | 1.4903 | X 10 CrMoVNb 9 1 |
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