ASTM A182/ASME SA 182 - Stainless Steel 321/321H Flanges
What is Stainless Steel 321/321H Flanges
Alloy 321 flanges are stabilized austenitic stainless steel with intergranular corrosion resistance. These flanges are highly alloyed and made from high quality raw material and superior machineries. These flanges are available in various sizes and shapes. The sizes of the flanges range from ½” to 60”. The Stainless Steel 321 flanges are made with high quality combinations and elements.
The grade includes a high amount of 18% chromium and 8% nickel content. The grade also involves a considerable amount of titanium grade. The stainless steel 321-321H also has great weldability and annealing properties. Stainless steel 321H flanges are used as a boiler and heat exchangers in some industries.
Stainless steel 321H flanges can withstand high heat and cold temperatures. It also provides excellent resistance from corrosion, crevice corrosion and stress cracking. It also provides excellent protection from oxidation and cryogenic corrosion.

Stainless Steel 321 Blind Flange, 321 SS SORF Flange, DIN 1.4449 Orifice Flange, SS 321 RTJ Flange, DIN 1.4541 Lap Joint Flange, 321 SS Reducing Flange, SS 321H Longweld Neck Flange, DIN 1.4541 Flat Flange.
Sumit impex is one of the most astonishing manufacturers and suppliers of these stainless steel 321 flanges. We at Sumit Impex make sure that our every product is made of high quality raw material and supreme quality elements. We also make sure that our every product is tested and certified.
Stainless steel 321H flanges resists oxidation to 1500°F., which is why the creep and rupture strength of the grade is higher than other grades. Alloy 321H also has high carbon content which provides it an amazing resistance. The tensile and yield strength of this grade is higher than other alloys. The minimum tensile strength of this alloy is 75000 psi and the yield strength is 30000 Psi.
Specification:- Stainless Steel 321/321H Flanges
Specification | ASTM A182 / ASME SA182 |
Dimension Standard | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Size | 1/2" (15 NB) to 48" (1200NB) |
Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
DIN Flanges | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673. |
JIS Flanges | JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K |
BS Flanges | BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H. |
Equivalent Grade:- Stainless Steel 321/321H Flanges
STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Chemical Composition:- Stainless Steel 321/321H Flanges
Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) – 0.70 max |
SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
Mechanical Properties:- Stainless Steel 321/321H Flanges
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Dimensions:- Stainless Steel 321/321H Flanges
- Class 150 Flanges
- Class 300 Flanges
- Class 400 Flanges
- Class 600 Flanges
- Class 900 Flanges
- Class 1500 Flanges
- Class 2500 Flanges
Class 150 Flanges

Nom. Pipe Size | O | T | R | X | No./Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | D |
1/2 | 3.5 | 0.44 | 1.38 | 1.19 | 4-0.62 | 2.38 | 1.88 | 0.84 | 0.62 | 0.62 | 0.88 | 0.12 | 0.62 | 0.9 | 0.38 |
3/4 | 3.88 | 0.5 | 1.69 | 1.5 | 4-0.62 | 2.75 | 2.06 | 1.05 | 0.82 | 0.62 | 1.09 | 0.12 | 0.62 | 1.11 | 0.44 |
1 | 4.25 | 0.56 | 2 | 1.94 | 4-0.62 | 3.12 | 2.19 | 1.32 | 1.05 | 0.69 | 1.36 | 0.12 | 0.69 | 1.38 | 0.5 |
1-1/4 | 4.62 | 0.62 | 2.5 | 2.31 | 4-0.62 | 3.5 | 2.25 | 1.66 | 1.38 | 0.81 | 1.7 | 0.19 | 0.81 | 1.72 | 0.56 |
1-1/2 | 5 | 0.68 | 2.88 | 2.56 | 4-0.62 | 3.88 | 2.44 | 1.9 | 1.61 | 0.88 | 1.95 | 0.25 | 0.88 | 1.97 | 0.62 |
2 | 6 | 0.75 | 3.62 | 3.06 | 4-0.75 | 4.75 | 2.5 | 2.38 | 2.07 | 1 | 2.44 | 0.31 | 1 | 2.46 | 0.69 |
2-1/2 | 7 | 0.88 | 4.12 | 3.56 | 4-0.75 | 5.5 | 2.75 | 2.88 | 2.47 | 1.12 | 2.94 | 0.31 | 1.12 | 2.97 | 0.75 |
3 | 7.5 | 0.94 | 5 | 4.25 | 4-0.75 | 6 | 2.75 | 3.5 | 3.07 | 1.19 | 3.57 | 0.38 | 1.19 | 3.6 | 0.81 |
3-1/2 | 8.5 | 0.94 | 5.5 | 4.81 | 8-0.75 | 7 | 2.81 | 4 | 3.55 | 1.25 | 4.07 | 0.38 | 1.25 | 4.1 | 0.88 |
4 | 9 | 0.94 | 6.19 | 5.31 | 8-0.75 | 7.5 | 3 | 4.5 | 4.03 | 1.31 | 4.57 | 0.44 | 1.31 | 4.6 | 0.94 |
5 | 10 | 0.94 | 7.31 | 6.44 | 8-0.88 | 8.5 | 3.5 | 5.56 | 5.05 | 1.44 | 5.66 | 0.44 | 1.44 | 5.69 | 0.94 |
6 | 11 | 1 | 8.5 | 7.56 | 8-0.88 | 9.5 | 3.5 | 6.63 | 6.07 | 1.56 | 6.72 | 0.5 | 1.56 | 6.75 | 1.06 |
8 | 13.5 | 1.12 | 10.62 | 9.69 | 8-0.88 | 11.75 | 4 | 8.63 | 7.98 | 1.75 | 8.72 | 0.5 | 1.75 | 8.75 | 1.25 |
10 | 16 | 1.19 | 12.75 | 12 | 12-1.00 | 14.25 | 4 | 10.75 | 10.02 | 1.94 | 10.88 | 0.5 | 1.94 | 10.92 | 1.31 |
12 | 19 | 1.25 | 15 | 14.38 | 12-1.00 | 17 | 4.5 | 12.75 | 12 | 2.19 | 12.88 | 0.5 | 2.19 | 12.92 | 1.56 |
14 | 21 | 1.38 | 16.25 | 15.75 | 12-1.12 | 18.75 | 5 | 14 | 13.25 | 2.25 | 14.14 | 0.5 | 3.12 | 14.18 | 1.63 |
16 | 23.5 | 1.44 | 18.5 | 18 | 16-1.12 | 21.25 | 5 | 16 | 15.25 | 2.5 | 16.16 | 0.5 | 3.44 | 16.19 | 1.75 |
18 | 25 | 1.56 | 21 | 19.88 | 16-1.25 | 22.75 | 5.5 | 18 | 17.25 | 2.69 | 18.18 | 0.5 | 3.81 | 18.2 | 1.94 |
20 | 27.5 | 1.69 | 23 | 22 | 20-1.25 | 25 | 5.69 | 20 | 19.25 | 2.88 | 20.2 | 0.5 | 4.06 | 20.25 | 2.13 |
22 | 29.5 | 1.81 | 25.25 | 24.25 | 20-1.38 | 27.25 | 5.88 | 22 | 21.25 | 3.13 | 22.22 | 0.5 | 4.25 | 22.25 | 2.38 |
24 | 32 | 1.88 | 27.25 | 26.12 | 20-1.38 | 29.5 | 6 | 24 | 23.25 | 3.25 | 24.25 | 0.5 | 4.38 | 24.25 | 2.5 |
Class 300 Flanges

Nom. Pipe Size | O | T | R | X | No. & Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | D | C | THr |
1/2 | 3.75 | 0.56 | 1.38 | 1.5. | 4-0.62 | 2.62 | 2.06 | 0.84 | 0.62 | 0.88 | 0.88 | 0.12 | 0.88 | 0.9 | 0.38 | 0.93 | 0.62 |
3/4 | 4.62 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 2.25 | 1.05 | 0.82 | 1 | 1.09 | 0.12 | 1 | 1.11 | 0.44 | 1.14 | 0.62 |
1 | 4.88 | 0.69 | 2 | 2.12 | 4-0.75 | 3.5 | 2.44 | 1.32 | 1.05 | 1.06 | 1.36 | 0.12 | 1.06 | 1.38 | 0.5 | 1.41 | 0.69 |
1-1/4 | 5.25 | 0.75 | 2.5 | 2.5 | 4-0.75 | 3.88 | 2.56 | 1.66 | 1.38 | 1.06 | 1.7 | 0.19 | 1.06 | 1.72 | 0.56 | 1.75 | 0.81 |
1-1/2 | 6.12 | 0.81 | 2.88 | 2.75 | 4-0.88 | 4.5 | 2.69 | 1.9 | 1.61 | 1.19 | 1.95 | 0.25 | 1.19 | 1.97 | 0.62 | 1.99 | 0.88 |
2 | 6.5 | 0.88 | 3.62 | 3.31 | 8-0.75 | 5 | 2.75 | 2.38 | 2.07 | 1.31 | 2.44 | 0.31 | 1.31 | 2.46 | 0.69 | 2.5 | 1.12 |
2-1/2 | 7.5 | 1 | 4.12 | 3.94 | 8-0.88 | 5.88 | 3 | 2.88 | 2.47 | 1.5 | 2.94 | 0.31 | 1.5 | 2.97 | 0.75 | 3 | 1.25 |
3 | 8.25 | 1.12 | 5 | 4.62 | 8-0.88 | 6.62 | 3.12 | 3.5 | 3.07 | 1.69 | 3.57 | 0.38 | 1.69 | 3.6 | 0.81 | 3.63 | 1.25 |
3-1/2 | 9 | 1.19 | 5.5 | 5.25 | 8-0.88 | 7.25 | 3.19 | 4 | 3.55 | 1.75 | 4.07 | 0.38 | 1.75 | 4.1 | - | 4.13 | 1.44 |
4 | 10 | 1.25 | 6.19 | 5.75 | 8-0.88 | 7.88 | 3.38 | 4.5 | 4.03 | 1.88 | 4.57 | 0.44 | 1.88 | 4.6 | - | 4.63 | 1.44 |
5 | 11 | 1.38 | 7.31 | 7 | 8-0.88 | 9.25 | 3.88 | 5.56 | 5.05 | 2 | 5.66 | 0.44 | 2 | 5.69 | - | 5.69 | 1.69 |
6 | 12.5 | 1.44 | 8.5 | 8.12 | 12-0.88 | 10.62 | 3.88 | 6.63 | 6.07 | 2.06 | 6.72 | 0.5 | 2.06 | 6.75 | - | 6.75 | 1.81 |
8 | 15 | 1.62 | 10.62 | 10.25 | 12-1.00 | 13 | 4.38 | 8.63 | 7.98 | 2.44 | 8.72 | 0.5 | 2.44 | 8.75 | - | 8.75 | 2 |
10 | 17.5 | 1.88 | 12.75 | 12.62 | 16-1.12 | 15.25 | 4.62 | 10.75 | 10.02 | 2.62 | 10.88 | 0.5 | 3.75 | 10.92 | - | 10.88 | 2.19 |
12 | 20.5 | 2 | 15 | 14.75 | 16-1.25 | 17.75 | 5.12 | 12.75 | 12 | 2.88 | 12.88 | 0.5 | 4 | 12.92 | - | 12.94 | 2.38 |
14 | 23 | 2.12 | 16.25 | 16.75 | 20-1.25 | 20.25 | 5.62 | 14 | 13.25 | 3 | 14.14 | 0.5 | 4.38 | 14.18 | - | 14.19 | 2.5 |
16 | 25.5 | 2.25 | 18.5 | 19 | 20-1.38 | 22.5 | 5.75 | 16 | 15.25 | 3.25 | 16.16 | 0.5 | 4.75 | 16.19 | - | 16.19 | 2.69 |
18 | 28 | 2.38 | 21 | 21 | 24-1.38 | 24.75 | 6.25 | 18 | 17.25 | 3.5 | 18.18 | 0.5 | 5.12 | 18.2 | - | 18.19 | 2.75 |
20 | 30.5 | 2.5 | 23 | 23.12 | 24-1.38 | 27 | 6.38 | 20 | 19.25 | 3.75 | 20.2 | 0.5 | 5.5 | 20.25 | - | 20.19 | 2.88 |
22 | 33 | 2.63 | 25.25 | 25.25 | 24-1.63 | 29.25 | 6.5 | 22 | 21.25 | 4 | 22.22 | 0.5 | 5.75 | 22.25 | - | 22.19 | 3.13 |
24 | 36 | 2.75 | 27.25 | 27.62 | 24-1.62 | 32 | 6.62 | 24 | 23.25 | 4.19 | 24.25 | 0.5 | 6 | 24.25 | - | 24.19 | 3.25 |
Class 400 Flanges

Nom. Pipe Size | O | T | R | X | No.& Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | D | C | THr |
1/2 | 3.75 | 0.56 | 1.38 | 1.5 | 4-0.62 | 2.62 | 2.06 | 0.84 | To be specified by purchaser. | 0.88 | 0.88 | 0.12 | 0.88 | 0.9 | 0.38 | 0.93 | 0.62 |
3/4 | 4.62 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 2.25 | 1.05 | 1 | 1.09 | 0.12 | 1 | 1.11 | 0.44 | 1.14 | 0.62 | |
1 | 4.88 | 0.69 | 2 | 2.12 | 4-.075 | 3.5 | 2.44 | 1.32 | 1.06 | 1.36 | 0.12 | 1.06 | 1.38 | 0.5 | 1.41 | 0.69 | |
1-1/4 | 5.25 | 0.81 | 2.5 | 2.5 | 4-0.75 | 3.88 | 2.62 | 1.66 | 1.12 | 1.7 | 0.19 | 1.12 | 1.72 | 0.56 | 1.75 | 0.81 | |
1-1/2 | 6.12 | 0.88 | 2.88 | 2.75 | 4-0.88 | 4.5 | 2.75 | 1.9 | 1.25 | 1.95 | 0.25 | 1.25 | 1.97 | 0.62 | 1.99 | 0.88 | |
2 | 6.5 | 1 | 3.62 | 3.31 | 8-0.75 | 5 | 2.88 | 2.38 | 1.44 | 2.44 | 0.31 | 1.44 | 2.46 | 0.69 | 2.5 | 1.12 | |
2-1/2 | 7.5 | 1.12 | 4.12 | 3.94 | 8-0.88 | 5.88 | 3.12 | 2.88 | 1.62 | 2.94 | 0.31 | 1.62 | 2.97 | 0.75 | 3 | 1.25 | |
3 | 8.25 | 1.25 | 5 | 4.62 | 8-0.88 | 6.62 | 3.25 | 3.5 | 1.81 | 3.57 | 0.38 | 1.81 | 3.6 | 0.81 | 3.63 | 1.38 | |
3-1/2 | 9 | 1.38 | 5.5 | 5.25 | 8-1.00 | 7.25 | 3.38 | 4 | 1.94 | 4.07 | 0.38 | 1.94 | 4.1 | - | 4.13 | 1.56 | |
4 | 10 | 1.38 | 6.19 | 5.75 | 8-1.00 | 7.88 | 3.5 | 4.5 | 2 | 4.57 | 0.44 | 2 | 4.6 | - | 4.63 | 1.44 | |
5 | 11 | 1.5 | 7.31 | 7 | 8-1.00 | 9.25 | 4 | 5.56 | 2.12 | 5.66 | 0.44 | 2.12 | 5.69 | - | 5.69 | 1.69 | |
6 | 12.5 | 1.62 | 8.5 | 8.12 | 12-1.00 | 10.62 | 4.06 | 6.63 | 2.25 | 6.72 | 0.5 | 2.25 | 6.75 | - | 6.75 | 1.81 | |
8 | 15 | 1.88 | 10.62 | 10.25 | 12-1.12 | 13 | 4.62 | 8.63 | 2.69 | 8.72 | 0.5 | 2.69 | 8.75 | - | 8.75 | 2 | |
10 | 17.5 | 2.12 | 12.75 | 12.62 | 16-1.25 | 15.25 | 4.88 | 10.75 | 2.88 | 10.88 | 0.5 | 4 | 10.92 | - | 10.88 | 2.19 | |
12 | 20.5 | 2.25 | 15 | 14.75 | 16-1.38 | 17.75 | 5.38 | 12.75 | 3.12 | 12.88 | 0.5 | 4.25 | 12.92 | - | 12.94 | 2.38 | |
14 | 23 | 2.38 | 16.25 | 16.75 | 20-1.38 | 20.25 | 5.88 | 14 | 3.31 | 14.14 | 0.5 | 4.62 | 14.18 | - | 14.19 | 2.5 | |
16 | 25.5 | 2.5 | 18.5 | 19 | 20-1.50 | 22.5 | 6 | 16 | 3.69 | 16.16 | 0.5 | 5 | 16.19 | - | 16.19 | 2.69 | |
18 | 28 | 2.62 | 21 | 21 | 24-1.50 | 24.75 | 6.5 | 18 | 3.88 | 18.18 | 0.5 | 5.38 | 18.2 | - | 18.19 | 2.75 | |
20 | 30.5 | 2.75 | 23 | 23.12 | 24-1.62 | 27 | 6.62 | 20 | 4 | 20.2 | 0.5 | 5.75 | 20.25 | - | 20.19 | 2.88 | |
22 | 33 | 2.88 | 25.25 | 25.25 | 24-1.75 | 29.25 | 6.75 | 22 | 4.25 | 22.22 | 0.5 | 6 | 22.25 | - | -- | -- | |
24 | 36 | 3 | 27.25 | 27.62 | 24-1.88 | 32 | 6.88 | 24 | 4.5 | 24.25 | 0.5 | 6.25 | 24.25 | - | 24.19 | 3.25 |
Class 600 Flanges

Nom. Pipe Size | O | T | R | X | No.& Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | D | C | THr |
1/2 | 3.75 | 0.56 | 1.38 | 1.5 | 4-0.62 | 2.62 | 2.06 | 0.84 | To be specified by purchaser. | 0.88 | 0.88 | 0.12 | 0.88 | 0.9 | 0.38 | 0.93 | 0.62 |
3/4 | 4.62 | 0.62 | 1.69 | 1.88 | 4-0.75 | 3.25 | 2.25 | 1.05 | 1 | 1.09 | 0.12 | 1 | 1.11 | 0.44 | 1.14 | 0.62 | |
1 | 4.88 | 0.69 | 2 | 2.12 | 4-.075 | 3.5 | 2.44 | 1.32 | 1.06 | 1.36 | 0.12 | 1.06 | 1.38 | 0.5 | 1.41 | 0.69 | |
1-1/4 | 5.25 | 0.81 | 2.5 | 2.5 | 4-0.75 | 3.88 | 2.62 | 1.66 | 1.12 | 1.7 | 0.19 | 1.12 | 1.72 | 0.56 | 1.75 | 0.81 | |
1-1/2 | 6.12 | 0.88 | 2.88 | 2.75 | 4-0.88 | 4.5 | 2.75 | 1.9 | 1.25 | 1.95 | 0.25 | 1.25 | 1.97 | 0.62 | 1.99 | 0.88 | |
2 | 6.5 | 1 | 3.62 | 3.31 | 8-0.75 | 5 | 2.88 | 2.38 | 1.44 | 2.44 | 0.31 | 1.44 | 2.46 | 0.69 | 2.5 | 1.12 | |
2-1/2 | 7.5 | 1.12 | 4.12 | 3.94 | 8-0.88 | 5.88 | 3.12 | 2.88 | 1.62 | 2.94 | 0.31 | 1.62 | 2.97 | 0.75 | 3 | 1.25 | |
3 | 8.25 | 1.25 | 5 | 4.62 | 8-0.88 | 6.62 | 3.25 | 3.5 | 1.81 | 3.57 | 0.38 | 1.81 | 3.6 | 0.81 | 3.63 | 1.38 | |
3-1/2 | 9 | 1.38 | 5.5 | 5.25 | 8-1.00 | 7.25 | 3.38 | 4 | 1.94 | 4.07 | 0.38 | 1.94 | 4.1 | - | 4.13 | 1.56 | |
4 | 10.75 | 1.5 | 6.19 | 6 | 8-1.00 | 8.5 | 4 | 4.5 | 2.12 | 4.57 | 0.44 | 2.12 | 4.6 | - | 4.63 | 1.62 | |
5 | 13 | 1.75 | 7.31 | 7.44 | 8-1.12 | 10.5 | 4.5 | 5.56 | 2.38 | 5.66 | 0.44 | 2.38 | 5.69 | - | 5.69 | 1.88 | |
6 | 14 | 1.88 | 8.5 | 8.75 | 12-1.12 | 11.5 | 4.62 | 6.63 | 2.62 | 6.72 | 0.5 | 2.62 | 6.75 | - | 6.75 | 2 | |
8 | 16.5 | 2.19 | 10.62 | 10.75 | 12-1.25 | 13.75 | 5.25 | 8.63 | 3 | 8.72 | 0.5 | 3 | 8.75 | - | 8.75 | 2.25 | |
10 | 20 | 2.5 | 12.75 | 13.5 | 16-1.38 | 17 | 6 | 10.75 | 3.38 | 10.88 | 0.5 | 4.38 | 10.92 | - | 10.88 | 2.56 | |
12 | 22 | 2.62 | 15 | 15.75 | 20-1.38 | 19.25 | 6.12 | 12.75 | 3.62 | 12.88 | 0.5 | 4.62 | 12.92 | - | 12.94 | 2.75 | |
14 | 23.75 | 2.75 | 16.25 | 17 | 20-1.50 | 20.75 | 6.5 | 14 | 3.69 | 14.14 | 0.5 | 5 | 14.18 | - | 14.19 | 2.88 | |
16 | 27 | 3 | 18.5 | 19.5 | 20-1.62 | 23.75 | 7 | 16 | 4.19 | 16.16 | 0.5 | 5.5 | 16.19 | - | 18.19 | 3.06 |
Class 900 Flanges

Nom. Pipe Size | O | T | R | X | No.& Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | THr |
Sizes 1/2" Thru 2-1/2" Are Identic al To Class 1500. | |||||||||||||||
3 | 9.5 | 1.5 | 5 | 5 | 8-1.00 | 7.5 | 4 | 3.5 | To be specified by purchaser. | 2.13 | 3.57 | 0.38 | 2.13 | 3.6 | 1.63 |
4 | 11.5 | 1.75 | 6.19 | 6.25 | 8-1.25 | 9.25 | 4.5 | 4.5 | 2.75 | 4.57 | 0.44 | 2.75 | 4.6 | 1.88 | |
5 | 13.75 | 2 | 7.31 | 7.5 | 8-1.38 | 11 | 5 | 5.56 | 3.13 | 5.66 | 0.44 | 3.13 | 5.69 | 2.13 | |
6 | 15 | 2.19 | 8.5 | 9.25 | 12-1.25 | 12.5 | 5.5 | 6.63 | 3.38 | 6.72 | 0.5 | 3.38 | 6.75 | 2.25 | |
8 | 18.5 | 2.5 | 10.63 | 11.75 | 12-1.50 | 15.5 | 6.38 | 8.63 | 4 | 8.72 | 0.5 | 4.5 | 8.75 | 2.5 | |
10 | 21.5 | 2.75 | 12.75 | 14.5 | 16-1.50 | 18.5 | 7.25 | 10.75 | 4.25 | 10.88 | 0.5 | 5 | 10.92 | 2.81 | |
12 | 24 | 3.13 | 15 | 16.5 | 20-1.50 | 21 | 7.88 | 12.75 | 4.63 | 12.88 | 0.5 | 5.63 | 12.92 | 3 | |
14 | 25.25 | 3.38 | 16.25 | 17.75 | 20-1.63 | 22 | 8.38 | 14 | 5.13 | 14.14 | 0.5 | 6.13 | 14.18 | 3.25 | |
16 | 27.75 | 3.5 | 18.5 | 20 | 20-1.75 | 24.25 | 8.5 | 16 | 5.25 | 16.16 | 0.5 | 6.5 | 16.19 | 3.38 | |
18 | 31 | 4 | 21 | 22.25 | 20-2.00 | 27 | 9 | 18 | 6 | 18.18 | 0.5 | 7.5 | 18.2 | 3.5 | |
20 | 33.75 | 4.25 | 23 | 24.5 | 20-2.13 | 29.5 | 9.75 | 20 | 6.25 | 20.2 | 0.5 | 8.25 | 20.25 | 3.63 | |
24 | 41 | 5.5 | 27.25 | 29.5 | 20-2.63 | 35.5 | 11.5 | 24 | 8 | 24.25 | 0.5 | 10.5 | 24.25 | 4 |
Class 1500 Flanges

Nom. Pipe Size | O | T | R | X | No.& Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | D | B3 | THr |
1/2 | 4.75 | 0.88 | 1.38 | 1.5 | 4-0.88 | 3.25 | 2.38 | 0.84 | To be specified by purchaser. | 1.25 | 0.88 | 0.13 | 1.25 | 0.38 | 0.9 | 0.88 |
3/4 | 5.13 | 1 | 1.69 | 1.75 | 4-0.88 | 3.5 | 2.75 | 1.05 | 1.38 | 1.09 | 0.13 | 1.38 | 0.44 | 1.11 | 1 | |
1 | 5.88 | 1.13 | 2 | 2.06 | 4-1.00 | 4 | 2.88 | 1.32 | 1.63 | 1.36 | 0.13 | 1.63 | 0.5 | 1.38 | 1.13 | |
1-1/4 | 6.25 | 1.13 | 2.5 | 2.5 | 4-1.00 | 4.38 | 2.88 | 1.66 | 1.63 | 1.7 | 0.19 | 1.63 | 0.56 | 1.72 | 1.19 | |
1-1/2 | 7 | 1.25 | 2.88 | 2.75 | 4-1.13 | 4.88 | 3.25 | 1.9 | 1.75 | 1.95 | 0.25 | 1.75 | 0.63 | 1.97 | 1.25 | |
2 | 8.5 | 1.5 | 3.63 | 4.13 | 8-1.00 | 6.5 | 4 | 2.38 | 2.25 | 2.44 | 0.31 | 2.25 | 0.69 | 2.46 | 1.5 | |
2-1/2 | 9.63 | 1.63 | 4.13 | 4.88 | 8-1.13 | 7.5 | 4.13 | 2.88 | 2.5 | 2.94 | 0.31 | 2.5 | 0.75 | 2.97 | 1.88 | |
3 | 10.5 | 1.88 | 5 | 5.25 | 8-1.25 | 8 | 4.63 | 3.5 | 2.88 | 3.57 | 0.38 | 2.88 | -- | 3.6 | 2 | |
4 | 12.25 | 2.13 | 6.19 | 6.38 | 8-1.38 | 9.5 | 4.88 | 4.5 | 3.56 | 4.57 | 0.44 | 3.56 | -- | 4.6 | 2.25 | |
5 | 14.75 | 2.88 | 7.31 | 7.75 | 8-1.63 | 11.5 | 6.13 | 5.56 | 4.13 | 5.66 | 0.44 | 4.13 | -- | 5.69 | 2.5 | |
6 | 15.5 | 3.25 | 8.5 | 9 | 12-1.50 | 12.5 | 6.75 | 6.63 | 4.69 | 6.72 | 0.5 | 4.69 | -- | 6.75 | 2.75 | |
8 | 19 | 3.63 | 10.63 | 11.5 | 12-1.75 | 15.5 | 8.38 | 8.63 | 5.63 | 8.72 | 0.5 | 5.63 | -- | 8.75 | 3 | |
10 | 23 | 4.25 | 12.75 | 14.5 | 12-2.00 | 19 | 10 | 10.75 | 6.25 | 10.88 | 0.5 | 7 | -- | 10.92 | 3.31 | |
12 | 26.5 | 4.88 | 15 | 17.75 | 16-2.13 | 22.5 | 11.13 | 12.75 | 7.13 | 12.88 | 0.5 | 8.63 | -- | 12.92 | 3.63 | |
14 | 29.5 | 5.25 | 16.25 | 19.5 | 16-2.38 | 25 | 11.75 | 14 | -- | -- | 0.5 | 9.5 | -- | 14.18 | -- | |
16 | 32.5 | 5.75 | 18.5 | 21.75 | 16-2.63 | 27.75 | 12.25 | 16 | -- | -- | 0.5 | 10.25 | -- | 16.19 | -- | |
18 | 36 | 6.38 | 21 | 23.5 | 16-2.88 | 30.5 | 12.88 | 18 | -- | -- | 0.5 | 10.88 | -- | 18.2 | -- | |
20 | 38.75 | 7 | 23 | 25.25 | 16-3.13 | 32.75 | 14 | 20 | -- | -- | 0.5 | 11.5 | -- | 20.25 | -- | |
24 | 46 | 8 | 27.25 | 30 | 16-3.63 | 39 | 16 | 24 | -- | -- | 0.5 | 13 | -- | 24.25 | -- |
Class 2500 Flanges

Nom. Pipe Size | O | T | R | X | No.& Dia. of Holes | Bolt Circle Dia. | L2 | H | B2 | L | B | r | L3 | B3 | THr |
1/2 | 5.25 | 1.19 | 1.38 | 1.69 | 4-0.88 | 3.5 | 2.88 | 0.84 | To be specified by purchaser. | 1.56 | 0.88 | 0.13 | 1.56 | 0.9 | 1.13 |
3/4 | 5.5 | 1.25 | 1.69 | 2 | 4-0.88 | 3.75 | 3.13 | 1.05 | 1.69 | 1.09 | 0.13 | 1.69 | 1.11 | 1.25 | |
1 | 6.25 | 1.38 | 2 | 2.25 | 4-1.00 | 4.25 | 3.5 | 1.32 | 1.88 | 1.36 | 0.13 | 1.88 | 1.38 | 1.38 | |
1-1/4 | 7.25 | 1.5 | 2.5 | 2.88 | 4-1.13 | 5.13 | 3.75 | 1.66 | 2.06 | 1.7 | 0.18 | 2.06 | 1.72 | 1.5 | |
1-1/2 | 8 | 1.75 | 2.88 | 3.13 | 4-1.25 | 5.75 | 4.38 | 1.9 | 2.38 | 1.95 | 0.25 | 2.38 | 1.97 | 1.75 | |
2 | 9.25 | 2 | 3.63 | 3.75 | 8-1.13 | 6.75 | 5 | 2.38 | 2.75 | 2.44 | 0.31 | 2.75 | 2.46 | 2 | |
2-1/2 | 10.5 | 2.25 | 4.13 | 4.5 | 8-1.25 | 7.75 | 5.63 | 2.88 | 3.13 | 2.94 | 0.31 | 3.13 | 2.97 | 2.25 | |
3 | 12 | 2.63 | 5 | 5.25 | 8-1.38 | 9 | 6.63 | 3.5 | 3.63 | 3.57 | 0.37 | 3.63 | 3.6 | 2.5 | |
4 | 14 | 3 | 6.19 | 6.5 | 8-1.63 | 10.75 | 7.5 | 4.5 | 4.25 | 4.57 | 0.44 | 4.25 | 4.6 | 2.75 | |
5 | 16.5 | 3.63 | 7.31 | 8 | 8-1.88 | 12.75 | 9 | 5.56 | 5.13 | 5.66 | 0.44 | 5.13 | 5.69 | 3 | |
6 | 19 | 4.25 | 8.5 | 9.25 | 8-2.13 | 14.5 | 10.75 | 6.63 | 6 | 6.72 | 0.5 | 6 | 6.75 | 3.25 | |
8 | 21.75 | 5 | 10.63 | 12 | 12-2.13 | 17.25 | 12.5 | 8.63 | 7 | 8.72 | 0.5 | 7 | 8.75 | 3.75 | |
10 | 26.5 | 6.5 | 12.75 | 14.75 | 12-2.63 | 21.25 | 16.5 | 10.75 | 9 | 10.88 | 0.5 | 9 | 10.92 | 4.25 | |
12 | 30 | 7.25 | 15 | 17.38 | 12-2.88 | 24.38 | 18.25 | 12.75 | 10 | 12.88 | 0.5 | 10 | 12.92 | 4.75 |
Pressure Rating:- Stainless Steel 321/321H Flanges
Pipe Size (inch) | 150 # | 300 # | 600 # | 900 # | 1500 # | 2500 # | ||||||||||||
WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | WN | SO | BLD | |
1/2″ | 2 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 2 | SEE 1500 # WEIGHTS | 5 | 4 | 4 | 7 | 7 | 7 | ||
3/4″ | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 3 | SEE 1500 # WEIGHTS | 6 | 5 | 6 | 8 | 8 | 8 | ||
1″ | 3 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | SEE 1500 # WEIGHTS | 9 | 8 | 8 | 12 | 11 | 11 | ||
1 1/2″ | 4 | 3 | 3 | 7 | 6 | 6 | 8 | 7 | 8 | SEE 1500 # WEIGHTS | 13 | 12 | 13 | 25 | 22 | 23 | ||
2″ | 6 | 5 | 5 | 9 | 7 | 8 | 12 | 9 | 10 | SEE 1500 # WEIGHTS | 25 | 25 | 25 | 42 | 37 | 39 | ||
2 1/2″ | 8 | 7 | 7 | 12 | 10 | 12 | 18 | 13 | 15 | SEE 1500 # WEIGHTS | 36 | 36 | 35 | 52 | 55 | 56 | ||
3″ | 10 | 8 | 9 | 15 | 13 | 16 | 23 | 16 | 20 | 31 | 26 | 29 | 48 | 48 | 48 | 94 | 83 | 86 |
4″ | 15 | 13 | 17 | 25 | 22 | 27 | 42 | 37 | 41 | 53 | 53 | 54 | 73 | 73 | 73 | 145 | 125 | 130 |
5″ | 19 | 15 | 20 | 32 | 28 | 35 | 68 | 63 | 68 | 86 | 83 | 87 | 130 | 130 | 140 | 245 | 210 | 225 |
6″ | 24 | 19 | 26 | 42 | 39 | 50 | 81 | 80 | 86 | 110 | 110 | 115 | 165 | 165 | 160 | 380 | 325 | 345 |
8″ | 39 | 30 | 45 | 67 | 58 | 81 | 120 | 115 | 140 | 175 | 170 | 200 | 275 | 260 | 300 | 580 | 485 | 530 |
10″ | 52 | 43 | 70 | 91 | 81 | 124 | 190 | 170 | 230 | 260 | 245 | 290 | 455 | 435 | 510 | 1075 | 930 | 1025 |
12″ | 80 | 64 | 110 | 140 | 115 | 185 | 225 | 200 | 295 | 325 | 325 | 415 | 690 | 580 | 690 | 1525 | 1100 | 1300 |
14″ | 110 | 90 | 140 | 180 | 165 | 250 | 280 | 230 | 355 | 400 | 400 | 520 | 940 | NA | 975 | NA | NA | NA |
16″ | 140 | 98 | 180 | 250 | 190 | 295 | 390 | 330 | 495 | 495 | 425 | 600 | 1250 | NA | 1300 | NA | NA | NA |
18″ | 150 | 130 | 220 | 320 | 250 | 395 | 475 | 400 | 630 | 680 | 600 | 850 | 1625 | NA | 1750 | NA | NA | NA |
20″ | 180 | 165 | 285 | 400 | 315 | 505 | 590 | 510 | 810 | 830 | 730 | 1075 | 2050 | NA | 2225 | NA | NA | NA |
22″ | 225 | 185 | 355 | 465 | 370 | 640 | 720 | 590 | 1000 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
24″ | 260 | 220 | 430 | 580 | 475 | 790 | 830 | 730 | 1250 | 1500 | 1400 | 2025 | 3325 | NA | 3625 | NA | NA | NA |
Weight Chart:- Stainless Steel 321/321H Flanges
- Class 150 Weight
- Class 300 Weight
- Class 600 Weight
- Class 900 Weight
- Class 1500 Weight
- Class 2500 Weight
Class 150 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
NPS (Inches) | DN (mm) | FLANGE MM | FLANGE THICKNESS | SOW SW | WN | BLIND |
1/2 | 15 | 88.9 | 11.2 | 0.4 | 0.5 | 0.4 |
3/4 | 20 | 98.6 | 12.7 | 0.6 | 0.7 | 0.6 |
1 | 25 | 108 | 14.2 | 0.8 | 1 | 0.9 |
1 1/4 | 32 | 117.3 | 15.7 | 1 | 1.3 | 1.2 |
1 1/2 | 40 | 127 | 17.5 | 1.3 | 1.7 | 1.5 |
2 | 50 | 152.4 | 19.1 | 2.1 | 2.6 | 2.4 |
2 1/2 | 65 | 177.8 | 22.4 | 3.3 | 4.1 | 3.9 |
3 | 80 | 190.5 | 23.9 | 3.9 | 4.9 | 4.9 |
3 1/2 | 90 | 215.9 | 23.9 | 4.8 | 6.1 | 6.2 |
4 | 100 | 228.6 | 23.9 | 5.3 | 6.8 | 7.0 |
5 | 125 | 254 | 23.9 | 6.1 | 8.6 | 8.6 |
6 | 150 | 279.4 | 25.4 | 7.5 | 10.6 | 11.3 |
8 | 200 | 342.9 | 28.4 | 12.1 | 17.6 | 19.6 |
10 | 250 | 406.4 | 30.2 | 16.5 | 24 | 28.6 |
12 | 300 | 482.6 | 31.8 | 26.2 | 36.5 | 43.2 |
14 | 350 | 533.4 | 35.1 | 34.6 | 48.4 | 58.1 |
16 | 400 | 596.9 | 36.6 | 44.8 | 60.6 | 76.1 |
18 | 450 | 635 | 39.6 | 48.9 | 68.3 | 93.7 |
20 | 500 | 698.5 | 42.9 | 61.9 | 84.5 | 122.0 |
24 | 600 | 812.8 | 47.8 | 86.9 | 115 | 185.0 |
Class 300 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
NPS (Inches) | DN (mm) | FLANGE OD A MM | FLANGE THICKNESS D MM | SOW SW | WN | BLIND |
1/2 | 15 | 95.3 | 14.2 | 0.6 | 0.8 | 0.6 |
3/4 | 20 | 117.3 | 15.7 | 1.1 | 1.3 | 1.1 |
1 | 25 | 124 | 17.5 | 1.4 | 1.5 | 1.4 |
1 1/4 | 32 | 133.4 | 19.1 | 1.7 | 2.0 | 1.8 |
1 1/2 | 40 | 155.5 | 20.6 | 2.5 | 2.9 | 2.7 |
2 | 50 | 165.1 | 22.4 | 2.9 | 3.4 | 3.2 |
2 1/2 | 65 | 190.5 | 25.4 | 4.3 | 5.2 | 4.9 |
3 | 80 | 215.9 | 28.4 | 5.9 | 6.9 | 6.8 |
3 1/2 | 90 | 228.6 | 30.2 | 7.3 | 8.7 | 8.7 |
4 | 100 | 254 | 31.8 | 9.6 | 11.2 | 11.5 |
5 | 125 | 279.4 | 35.1 | 12.3 | 15.1 | 15.6 |
6 | 150 | 317.5 | 36.6 | 15.6 | 19.1 | 20.9 |
8 | 200 | 381 | 41.1 | 24.2 | 29.9 | 34.3 |
10 | 250 | 444.5 | 47.6 | 34.1 | 42.7 | 53.3 |
12 | 300 | 520.7 | 50.8 | 49.8 | 61.8 | 78.8 |
14 | 350 | 584.2 | 53.8 | 69.9 | 85.8 | 105.0 |
16 | 400 | 647.7 | 57.2 | 88.1 | 106.0 | 137.0 |
18 | 450 | 711.2 | 60.5 | 109.0 | 131.0 | 175.0 |
20 | 500 | 774.7 | 63.5 | 134.0 | 158.0 | 221.0 |
24 | 600 | 914.4 | 70.0 | 201.0 | 230.0 | 339.0 |
Class 600 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
NPS (Inches) | DN (mm) | FLANGE OD A MM | FLANGE THICKNESS D MM | SOW SW | WN | BLIND |
1/2 | 15 | 95.3 | 14.2 | 0.7 | 0.9 | 0.8 |
3/4 | 20 | 117.3 | 15.7 | 1.3 | 1.5 | 1.3 |
1 | 25 | 124.0 | 17.5 | 1.5 | 1.8 | 1.6 |
1 1/4 | 32 | 133.4 | 20.6 | 2 | 2.5 | 2.2 |
1 1/2 | 40 | 155.4 | 22.4 | 3 | 3.5 | 3.3 |
2 | 50 | 165.1 | 25.4 | 3.6 | 4.4 | 4.2 |
2 1/2 | 65 | 190.5 | 28.4 | 5.3 | 6.4 | 6.1 |
3 | 80 | 209.6 | 31.8 | 7 | 8.5 | 8.4 |
3 1/2 | 90 | 228.6 | 35.1 | 8.8 | 10.7 | 11 |
4 | 100 | 273.1 | 38.1 | 14.5 | 17.4 | 17.3 |
5 | 125 | 330.2 | 44.5 | 24.4 | 29.2 | 29.4 |
6 | 150 | 355.6 | 47.8 | 28.7 | 34.9 | 36.1 |
8 | 200 | 419.1 | 55.6 | 43.4 | 53.9 | 58.9 |
10 | 250 | 508 | 63.5 | 70.3 | 86.5 | 97.5 |
12 | 300 | 558.8 | 66.5 | 84.2 | 103.0 | 124 |
14 | 350 | 603.3 | 69.9 | 98.7 | 122.0 | 151 |
16 | 400 | 685.8 | 76.2 | 142.0 | 170.0 | 214 |
18 | 450 | 743 | 82.6 | 173.0 | 204.0 | 272 |
20 | 500 | 812.8 | 88.9 | 220.0 | 254.0 | 349.0 |
24 | 600 | 939.8 | 101.6 | 312.0 | 358.0 | 533.0 |
Class 900 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
NPS (Inches) | DN (mm) | FLANGE OD A MM | FLANGE THICKNESS D MM | SOW SW | WN | BLIND |
1/2 | 15 | 120.7 | 22.4 | 1.8 | 1.9 | 1.8 |
3/4 | 20 | 130 | 25.4 | 2.4 | 2.6 | 2.4 |
1 | 25 | 149.4 | 28.4 | 3.6 | 3.7 | 3.6 |
1 1/4 | 32 | 158.8 | 28.4 | 4 | 4.3 | 4.1 |
1 1/2 | 40 | 177.8 | 31.8 | 5.5 | 5.9 | 5.8 |
2 | 50 | 215.9 | 38.1 | 10.2 | 10.8 | 10 |
2 1/2 | 65 | 244.3 | 41.1 | 13.9 | 15 | 14 |
3 | 80 | 241.3 | 38.1 | 11.6 | 13.7 | 13.1 |
4 | 100 | 292.1 | 44.5 | 19.7 | 22.5 | 26.9 |
5 | 125 | 349.3 | 50.8 | 31.9 | 37.4 | 36.5 |
6 | 150 | 381 | 55.6 | 41.1 | 47.7 | 47.4 |
8 | 200 | 469.9 | 63.5 | 70.7 | 81.3 | 82.5 |
10 | 250 | 546.1 | 69.9 | 101.0 | 119 | 122.0 |
12 | 300 | 609.6 | 79.2 | 133.0 | 157.0 | 173.0 |
14 | 350 | 641.4 | 85.6 | 153.0 | 180.0 | 206.0 |
16 | 400 | 704.9 | 88.9 | 185.0 | 217.0 | 259.0 |
18 | 450 | 787.4 | 101.6 | 258.0 | 292.0 | 367.0 |
20 | 500 | 857.3 | 108.0 | 317.0 | 362.0 | 463.0 |
24 | 600 | 1041.4 | 139.7 | 606.0 | 665.0 | 876.0 |
Class 1500 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | ||||
NPS (Inches) | DN (mm) | FLANGE OD A MM | FLANGE THICKNESS D MM | SOW SW | WN | BLIND |
1/2 | 15 | 120.7 | 22.4 | 1.8 | 1.9 | 1.8 |
3/4 | 20 | 130 | 25.4 | 2.4 | 2.6 | 2.4 |
1 | 25 | 149.4 | 28.4 | 3.6 | 3.7 | 3.6 |
1 1/4 | 32 | 158.8 | 28.4 | 4 | 4.3 | 4.1 |
1 1/2 | 40 | 177.8 | 31.8 | 5.5 | 5.9 | 5.8 |
2 | 50 | 215.9 | 38.1 | 10.2 | 10.8 | 10.1 |
2 1/2 | 65 | 244.3 | 41.1 | 13.9 | 15 | 14 |
3 | 80 | 266.7 | 47.8 | 19.9 | 19.1 | |
4 | 100 | 311.2 | 53.8 | 29.9 | 29.9 | |
5 | 125 | 374.7 | 73.2 | 55.4 | 58.4 | |
6 | 150 | 393.7 | 82.6 | 68.4 | 71.8 | |
8 | 200 | 482.6 | 91.9 | 117 | 122 | |
10 | 250 | 584.2 | 108 | 194.0 | 210.0 | |
12 | 300 | 673.1 | 124 | 288.0 | 316.0 | |
14 | 350 | 749.3 | 133.4 | 380.0 | 420 | |
16 | 400 | 825.5 | 146.1 | 485.0 | 558.0 | |
18 | 450 | 914.4 | 162.1 | 644.0 | 760.0 | |
20 | 500 | 984.3 | 177.8 | 775.0 | 965.0 | |
24 | 600 | 1168.4 | 203.2 | 1232.0 | 1558.0 |
Class 2500 Flanges Weight

NOMINAL SIZE | DIMENSIONS | WEIGHT (KG) | |||
NPS (Inches) | DN (mm) | FLANGE OD A MM | FLANGE THICKNESS D MM | WN | BLIND |
1/2 | 15 | 133.4 | 30.2 | 3.1 | 3.0 |
3/4 | 20 | 139.7 | 31.8 | 3.7 | 3.5 |
1 | 25 | 158.8 | 35.1 | 5.2 | 5.0 |
1 1/4 | 32 | 184.2 | 38.1 | 7.7 | 7.4 |
1 1/2 | 40 | 203.2 | 44.5 | 10.9 | 10.4 |
2 | 50 | 235 | 50.8 | 16.2 | 15.6 |
2 1/2 | 65 | 266.7 | 57.2 | 23.7 | 22.6 |
3 | 80 | 304.8 | 66.5 | 36.2 | 34.8 |
4 | 100 | 355.6 | 76.2 | 55.3 | 53.9 |
5 | 125 | 419.1 | 91.9 | 92.5 | 90.8 |
6 | 150 | 482.6 | 108 | 143.0 | 141 |
8 | 200 | 552.5 | 127 | 215.0 | 214 |
10 | 250 | 673.1 | 165.1 | 406.0 | 411.0 |
12 | 300 | 762 | 184.2 | 572.0 | 592.0 |
Different Types:- Stainless Steel 321/321H Flanges












Price List:- Stainless Steel 321/321H Flanges
- Stainless Steel 321 Blind Flanges
USD $2.1 – $10.01 / Kg - Stainless Steel 321H Reducing Flanges
USD $2.05 – $10.15 / Kg - Stainless Steel 321 Plate Flange
USD $2.45 – $10.45 / Kg - SS 321 Threaded Flanges
USD $2.18 – $10.78 / Kg - UNS S32100 Weld Neck Flanges
USD $2.14 – $10.39 / Kg - Astm A182 SS 321 RTJ Flanges
USD $2.11 – $8 / Kg - SS 321H Slip On Flanges
USD $2.13 – $10.89 / Kg

Application Industries
- Construction
- Bridges
- Petrochemical Industry
- Ship Building
- Engineering
- General Structural Purposes
- Offshore and Onshore Services

Packaging Industries
We Sumit Impex Metal Ensure the Best Quality of Packing, Because It Plays an Important Role Especially in the Case of International Shipments in Which Consignment Passes Through Various Channels to Reach the Ultimate Destination, So We Put Extraordinary Concern Regarding Packaging.
We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
- Boxes and Crates
- Shrink-wrapped
- Carton boxes
- Wooden pallets
- Wooden boxes
- Wooden crates

Testings (Destructive, Non Destructive)
- Mechanical Testing Such as Tensile, Elongation, Reduction of Area
- Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
- Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
- Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
- Positive Material Identification – PMI Testing
- Chemical Analysis – Spectro Analysis
- Intergranular Corrosion (IGC) Test
- Pitting Resistance Test
- Dye Penetrant Test (DP Test)
- Bend Test
- Micro Test
- Macro Test
- Hardness Test
- Flaring Test
- Flattening Test
- Hydrostatic Test
- Radiography Test
- Ultra Sonic Test (UT)
- Eddy Current Testing
- Impact Test
