ASTM A182 blind flange help to terminate the ends of piping systems. The main purpose of using blind flanges is to close off the unused portion of pipe or nozzle. Blind flanges consist of holes around its perimeter and the gasket of the sealing ring is machined into the mating surface.
The ASTM A182 blind flanges manufactured by us are ideal for high temperature and pressure environments. This flange is widely used in various industries, such as gas, oil, petrochemical, etc. One of the best features of these blind flanges is that they can be easily assembled and disassembled.
Specification of Forged Steel Flanges
|
Sealing Face |
RF, FF, FTJ |
|
Size Range |
1/2” – 60” / DN15 – DN1200 |
|
Pressure Rating |
Class 150, 300, 600, 900, 1500, 2500lb |
|
Standard |
ASME / ANSI B16.5, ASME B16.47 Series A/B |
|
Carbon Steel |
ASTM A105 / A105N |
|
Low Temp Carbon Steel |
ASTM A350 LF2/LF3 |
|
Pipeline Steel |
ASTM A694 F42 / 46 / 56 / 60 / 65 |
|
Alloy Steel |
ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 |
|
Stainless Steel |
ASTM A182 F304/304L/304H, 316/316L, 310S, 317,347,904L |
| Duplex Stainless Steel |
ASTM A182 F51, F53, F44 |
Manufacturing Process:
The flanges covered by ASTM A182 are typically produced by forging or rolling methods. This ensures that the material’s mechanical properties are optimized for the intended service conditions.
Pressure and Temperature Ratings:
ASTM A182 Stainless Steel Flanges are designed to meet specific and temperature requirements. The standard provides various classes (Class 150, Class 300, Class 600, etc.) to indicate the pressure-temperature rating of the flanges.
Dimension of ASME B16.5 Blind Flange
| Nominal Pipe Size |
A | C | G | H | I | J | Weight | |
|
mm |
mm |
mm |
mm |
Number of Holes |
mm | mm | kg/piece | |
| 1/2 | 21.3 | 95.2 | 14.2 | 35.1 | 4 | 15.7 | 66.55 | 0.64 |
| 3/4 | 26.7 | 117.3 | 15.7 | 42.9 | 4 | 19 | 82.5 | 1.11 |
| 1 | 33.4 | 123.9 | 17.5 | 50.8 | 4 | 19 | 88.9 | 1.39 |
| 11/4 | 42.2 | 133.3 | 19 | 63.5 | 4 | 19 | 98.5 | 1.79 |
| 11/2 | 48.3 | 155.4 | 20.6 | 73.15 | 4 | 22.3 | 114.3 | 2.66 |
| 2 | 60.3 | 165. 1 | 22.3 | 91.9 | 8 | 19. 10 | 127 | 3.18 |
| 21/2 | 73.0 | 190.5 | 25.4 | 104.6 | 8 | 22.3 | 1.493 | 4.85 |
| 3 | 88.9 | 209.5 | 28.4 | 127 | 8 | 22.3 | 168.1 | 6.81 |
| 31/2 | 101.6 | 228.6 | 30.2 | 139.7 | 8 | 22.3 | 184.1 | 8.71 |
| 4 | 114.3 | 254 | 31.7 | 157.2 | 8 | 22.3 | 200.1 | 11.5 |
| 5 | 141.3 | 279.4 | 35 | 185.7 | 8 | 22.3 | 234.9 | 15.6 |
| 6 | 168.3 | 317.5 | 36.5 | 215.9 | 12 | 22.3 | 269.7 | 20.9 |
| 8 | 219. 1 | 381 | 1.620 41.10 |
269.7 | 12 | 25.4 | 330.2 | 34.3 |
| 10 | 273.0 | 444.5 | 47.7 | 323.9 | 16 | 28.4 | 387.3 | 53.3 |
| 12 | 323.8 | 520.7 | 50.8 | 381 | 16 | 31.7 | 450.8 | 78.8 |
| 14 | 355.6 | 584.2 | 53.8 | 412.8 | 20 | 31.7 | 514.3 | 105 |
| 16 | 406.4 | 647.7 | 57.15 | 469.9 | 20 | 35 | 571.5 | 137 |
| 18 | 457.2 | 711.2 | 60.45 | 533.4 | 24 | 35 | 628.6 | 175 |
| 20 | 508.0 | 774.7 | 63.5 | 584.2 | 24 | 35 | 685.8 | 221 |
| 24 | 609.6 | 914.4 | 69.85 | 692.2 | 24 | 41. 10 | 812.8 | 339 |
Analysis of three mechanical properties of A182 flange
ASTM A182 blind flange includes three materials: alloy steel, stainless steel and duplex stainless steel. Due to the different materials, their mechanical properties are different.
Alloy Steel
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % | HARDNESS |
| ASTM A182 F5 | 485 min | 275 min | 20 min | 35 min | 143-217 |
| ASTM A182 F9 | 585 min | 380 min | 20 min | 40 min | 179-217 |
| ASTM A182 F12 CL1 | 415 min | 220 min | 20 min | 45 min | 121-174 |
| ASTM A182 F11 CL1 | 415 min | 205 min | 20 min | 45 min | 121-174 |
Alloy steel has good toughness, that is, it has the ability to absorb energy and resist fracture. Through appropriate alloy ratio and heat treatment process, alloy steel can still maintain a certain toughness in harsh environments such as low temperature.
Stainless steel
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A182 F304 | 515 min | 205 min | 30 min | 50 min |
| ASTM A182 F316 | 515 min | 205 min | 30 min | 50 min |
The yield strength of stainless steel varies depending on the specific grade. For example, the yield strength of common 304 stainless steel is about 205MPa. It is widely used in some structures that require a certain strength and corrosion resistance.
Duplex Stainless Steel
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A182 F51 | 620 min | 450 min | 25 min | 45 min |
| ASTM A182 F53 | 800 min | 550 min | 25 min | 15 min |
| ASTM A182 F55 | 750-895 | 550min | 25min | 45min |
| ASTM A182 F60 | 655min | 450min | 25min | 45min |
In ASTM A182 blind flanges, duplex stainless steel has a higher hardness and better wear resistance. In some occasions that require wear resistance and corrosion resistance, duplex stainless steel can resist wear while preventing erosion by corrosive media
- Petrochemical processing
- Chemical processing
- Oil and gas
- Power generation
Key Features & Benefits
- Leak-proof seal – Ensures system integrity.
- High-strength construction – Suitable for extreme pressures and temperatures.
- Corrosion resistance – Various materials available for different environments.
- Ease of installation & removal – Facilitates maintenance and system modifications.
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