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ASTM A182 F321 Slip On Flange

A182 F321 slip on flange is a common flange connection form. Its structure is relatively simple and is connected to pipes or other flanges by slip-on welding. The flange of the slip-on flange has bolt holes for bolting with the mating flange. When connected to the pipeline, the flange is put on the pipeline and then welded at the joint between the pipeline and the flange.

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A182 F321 slip on flange is a common flange connection form. Its structure is relatively simple and is connected to pipes or other flanges by slip on welding. The flange of the slip on flange has bolt holes for bolting with the mating flange. When connected to the pipeline, the flange is put on the pipeline and then welded at the joint between the pipeline and the flange.

A182 F321 is a material identification produced according to a specific standard and is used for the manufacture of slip-on flanges. A182 is a standard specification of the American Society for Testing and Materials (ASTM). This standard covers the specification requirements of a variety of forged or rolled alloy and stainless steel pipe flanges, forged pipe fittings, valves and parts for high temperature use.

F321 material belongs to austenitic stainless steel. It meets the relevant provisions of the A182 standard in terms of chemical composition and performance. It can provide specific mechanical properties and corrosion resistance when used to manufacture slip-on flanges. A182 F321 slip on flanges are widely used in various applications such as petrochemicals, power plants, pressure windows, natural gas, boilers, equipment, pumps and valves.

 

Specification of Slip on Flange

 

Sealing Face RF, FF, FTJ
Size Range 1/2″ – 24″ / DN15 – DN600
Pressure Rating Class 150, 300, 600, 900, 1500, 2500lb
Standard ANSI / ASME B16.5, EN1092-1
Stainless Steel ASTM A182 F304/304L/304H,F316/316L,F317,F310S ,F321,F347,F904L

 

ASTM A182 F321 Slip on Flange Chemical Composition

 

CHEMICAL LIMITS C Mn P S Si Ni Cr N Ti
ASTM A182 F321H MIN 0.04         9.00 17.00   4(C+N)
MAX 0.10 2.00 0.045 0.030 1.00 12.00 19.00   0.70
ASTM A182 F321 MIN           9.00 17.00 0.10 5(C+N)
MAX 0.08 2.00 0.045 0.030 1.00 12.00 19.00   0.70

 

ASTM A182 F321 Slip on Flange Mechanical Property

 

MATERIAL ASTM A182 F321 ASTM A182 F321H
T.S (MPA) 515 min 515min
Y.S (MPA) 205 min 205 min
EL % 30 min 30 min
R/A % 50 min 50 min

 

A182 F321 Flange Pressure Rating Table

 

  Nominal
Designation
Forgings Castings Plates
18Cr-10Ni-Ti A182 Gr.F321(1)   A240 Gr.321(1)
18Cr-10Ni-Ti A182 Gr.F321H(2)   A240 Gr.321H(2)
Working Pressures by Classes,psig
 Class
Temp.,F 150 300 400 600 900 1500 2500
-20 to 100 275 720 960 1440 2160 3600 6000
200 250 650 865 1295 1945 3240 5400
300 230 595 795 1190 1785 2975 4960
400 200 550 735 1105 1655 2760 4600
500 170 515 690 1030 1550 2580 4300
600 140 485 650 975 1460 2435 4060
650 125 475 635 950 1425 2375 3960
700 110 465 620 930 1395 2330 3880
750 95 460 610 915 1375 2290 3820
800 80 450 600 900 1355 2255 3760
850 65 445 595 895 1340 2230 3720
900 50 440 590 885 1325 2210 3680
950 35 385 515 775 1160 1930 3220
1000 20 365 485 725 1090 1820 3030
1050   360 480 720 1080 1800 3000
1100   310 415 625 935 1560 2600
1150   235 315 475 710 1185 1970
1200   185 245 370 555 925 1545
1250   140 185 280 420 705 1170
1300   110 145 220 330 550 915
1350   85 115 170 255 430 715
1400   65 85 130 195 325 545
1450   50 70 105 155 255 430
1500   40 50 75 115 190 315

 

Application areas

 

Petrochemical industry: In oil refining, chemical production and other devices, it is used to connect various pipeline systems to transport corrosive media (such as acids, alkalis, etc.) or high-temperature and high-pressure fluids. Due to the corrosion resistance and high-temperature performance of F321 material, it can ensure the long-term stable operation of the pipeline system under harsh working conditions.
Power industry: Used in the steam and water pipeline system of power stations, especially in some parts that require corrosion resistance and high-temperature performance. For example, in the connection of high-temperature and high-pressure steam pipelines, A182 F321 flat welding flanges can reliably connect pipelines to ensure the sealing and safety of the system.
Food and pharmaceutical industry: Due to the good corrosion resistance and hygienic properties of austenitic stainless steel, this flange is also commonly used in the pipeline system of the food processing and pharmaceutical industries to prevent the pipeline material from contaminating the product and meet the industry’s strict requirements for hygiene and safety.

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