Forging process of SS 304 Flanges
The F304 stainless steel Forged Flange is manufactured by heating the steel billet and then compressing the material with a steel hammer to give the flange the desired shape from its solid state.
What is difference between 304 Threaded Flange annealing and normalizing?
Annealing allows the 304 Threaded Flange material to cool down at a controlled rate inside a furnace. Whereas, normalizing allows the material to cool down at the room temperature.
ASTM A182 F304 Flanges Specification

Specifications :
Stainless Steel 304 Flanges

Face Type :
RF, FF, RTJ

Use In :
Oil and Gas, Petrochemical

Sizes :
1/2” to 24”

Certificate :
ISO, (SABIC) & KNPC

Equipment :
Pushing or Press Machine
What do DN and PN mean on 304 Stainless Steel Flanges?
DN denotes the nominal diameter and PN is the nominal pressure on 304 Stainless Steel Flanges .
Buy SA 182 304 Lapped joint Flange and A182 F304 Slip On Flange in Class 150 to 2500, check Inox 304 Ring Type Joint Flange price per kg in Dubai
Comparison SS 304 Flange Price In India and USA
Description |
Price In India (INR) Per KG |
Price In USA ($) Per KG |
SIZE: 300#, 2 Inch, 40S BORE, SWRF |
₹4378.72 |
US $54.79 |
SIZE: 300#, 3 Inch, 40S BORE, WNRF |
₹8928.46 |
US $111.72 |
SIZE: 150#, 4 Inch, 10S BORE, WNRF |
₹15926.10 |
US $199.28 |
SIZE: 300#, 1 3/4 Inch, 40S BORE, SWRF |
₹4442.65 |
US $55.59 |
SIZE: 300#, 3 Inch, 20S BORE, SWRF |
₹10926.42 |
US $136.72 |
SIZE: 150#, 2 Inch, 10S BORE, BLRF |
₹14784.07 |
US $184.99 |
SIZE: 150#, 3 Inch, 20S BORE, BLRF |
₹18779.98 |
US $234.99 |
SIZE: 300#, 4 Inch, 40S BORE, BLRF |
₹23974.67 |
US $299.99 |
SIZE: 300#, 6 Inch, 40S BORE, BLRF |
₹27970.58 |
US $349.99 |
SS 304 Blind Flange and 304 Stainless Steel Threaded Flange as per ASME B16.5, API, B16.47, ISO 7005 etc
Various Types of ASTM A182 F304 Stainless Steel Flanges Used in Piping Applications

AISI 304 Large Diameter Weld Neck Flange

Class 150 Stainless Steel 304 Slip On Flange

ASTM A182 F304 Blind Flange

304 SS Socket Weld Flange

SUS 304 Lap Joint Flange

304 Stainless Steel Plate Flange

SS 304 Threaded Flange

A182 F304 Orifice Flange

WNR 1.4301 Spectacle Blind Flange

304 SS RTJ Flanges

SA 182 Gr F304 Raised Face Flanges

Inox 304 Reducing Flanges

Stainless Steel 304 Square Flanges

304 Stainless Steel Flat Flanges

UNS S30400 Anchor Flanges

F304 Stainless Steel Forged Flange

304 SS WNRF Flange

AISI 304 Screwed Flange

UNS S30400 SORF Flange

304 Stainless Steel BLRF Flange

EN 1.4301 Industrial Flange
SA182 F304 Socket Weld Flange and F304 stainless steel Forged Flange for high temperature applications in Middle East
304 SS Flanges Equivalent
Grade |
Stainless Steel 304 Flanges |
UNS |
S30400 |
AFNOR |
Z7CN18‐09 |
BS |
304S31 |
WERKSTOFF No. |
1.4301 |
EN |
SUS 304 |
DIN |
1.4301 |
JIS |
SUS 304 |
Find reputable SS 304 Flanges suppliers in UAE who can supply A182 Gr F304 Lap Joint Flange and SA 182 F304 Weld Neck Flange as per your
A182 F304 Chemical Composition
How To Order A Stainless Steel 304 Flanges
The following details shall be communicated to the manufacturer when ordering stainless steel 304 flanges:
- Type (Weld Neck, Slip On, Blind, Socket Weld, Threaded, Lap Joint, Plate Flange)
- Specification (example ANSI/ASME B16.5, ASME B16.47 Series A & B, EN 1092-1, JIS, DIN, API, UNI etc.)
- NPS (Nominal pipe size)
- Pressure rating: flanges’ rating can range from class 150 to class 2500
- Pipe schedule : (for socket weld and welding neck flanges)
- Facing Type : according to ASME B16.5 standard, flanges have different facings, like RTJ, FF, RF
- Surface Finish : (smooth, stock, concentric serrated etc)
- Material Grade : (304, 304L, 316, 316L, 321, 310, 347, 904L)
Benefits and Advantages of 304 SS Slip On Flange
- Corrosion Resistant
- Versatility and Strength
- Appearance
- Environment-friendly
- Easy Access
- Fabrication time is short
- Modifications are simple
- No welding, No drilling
SS 304 Flange Dimensions and Weight Chart
NPS In MM |
O.D. |
Minimum Thickness |
Diameter of R/F |
Bolt Holes Number |
Bore Inner Daimeter Of Slip On |
Inner Daimeter Of Weld Neck Bore |
Hub Top Diameter |
12.7 |
3.50 |
0.38 |
1.38 |
4 |
0.88 |
0.62 |
0.84 |
19.05 |
3.88 |
0.44 |
1.69 |
4 |
1.09 |
0.82 |
1.05 |
25.4 |
4.25 |
0.50 |
2.00 |
4 |
1.36 |
1.05 |
1.32 |
31.75 |
4.62 |
0.56 |
2.50 |
4 |
1.70 |
1.38 |
1.66 |
38.1 |
5.00 |
0.62 |
2.88 |
4 |
1.95 |
1.61 |
1.90 |
50.8 |
6.00 |
0.69 |
3.62 |
4 |
2.44 |
2.07 |
2.38 |
63.5 |
7.00 |
0.81 |
4.12 |
4 |
2.94 |
2.47 |
2.88 |
76.2 |
7.50 |
0.88 |
5.00 |
4 |
3.57 |
3.07 |
3.50 |
88.9 |
8.50 |
0.88 |
5.50 |
8 |
4.07 |
3.55 |
4.00 |
101.6 |
9.00 |
0.88 |
6.19 |
8 |
4.57 |
4.03 |
4.50 |
127 |
10.00 |
0.88 |
7.31 |
8 |
5.66 |
5.05 |
5.56 |
152.4 |
11.00 |
0.94 |
8.50 |
8 |
6.72 |
6.07 |
6.63 |
203.2 |
13.50 |
1.06 |
10.62 |
8 |
8.72 |
7.98 |
8.63 |
254 |
16.00 |
1.12 |
12.75 |
12 |
10.88 |
10.02 |
10.75 |
304.8 |
19.00 |
1.19 |
15.00 |
12 |
12.88 |
12.00 |
12.75 |
355.6 |
21.00 |
1.31 |
16.25 |
12 |
14.14 |
13.25 |
14.00 |
406.4 |
23.50 |
1.38 |
18.50 |
16 |
16.16 |
15.25 |
16.00 |
457.2 |
25.00 |
1.50 |
21.00 |
16 |
18.18 |
17.25 |
18.00 |
508 |
27.50 |
1.62 |
23.00 |
20 |
20.20 |
19.25 |
20.00 |
558.8 |
29.50 |
1.75 |
25.25 |
20 |
22.22 |
21.25 |
22.00 |
609.6 |
32.00 |
1.81 |
27.25 |
20 |
24.25 |
23.25 |
24.00 |
Weight Chart
Normal Pipe Size
(MM) |
O.D. |
THICKNESS |
SORF & SWRF
Weight In pounds |
12.7 |
95.3 |
14.2 |
1.32277 |
19.05 |
117.3 |
15.7 |
2.42508 |
1 |
124 |
17.5 |
3.08647 |
31.75 |
133.4 |
19.1 |
3.74786 |
38.1 |
155.5 |
20.6 |
5.51156 |
50.8 |
165.1 |
22.4 |
6.39341 |
63.5 |
190.5 |
25.4 |
9.47988 |
76.2 |
215.9 |
28.4 |
13.0073 |
88.9 |
228.6 |
30.2 |
16.0937 |
101.6 |
254 |
31.8 |
21.1644 |
127 |
279.4 |
35.1 |
27.11686 |
152.4 |
317.5 |
36.6 |
34.39211 |
203.2 |
381 |
41.1 |
53.35187 |
254 |
444.5 |
47.6 |
75.17763 |
304.8 |
520.7 |
50.8 |
109.7902 |
355.6 |
584.2 |
53.8 |
154.1031 |
406.4 |
647.7 |
57.2 |
194.2273 |
457.2 |
711.2 |
60.5 |
240.304 |
508 |
774.7 |
63.5 |
295.419 |
609.6 |
914.4 |
70.0 |
443.129 |
DIN 1.4301 Flanges Mechanical Properties
Proof Stress (MPa) |
230 Min |
Tensile Strength (MPa) |
540 – 750 |
Elongation A50 mm |
45 Min % |
Design Shapes Of SA182 F304 Weld Neck Flange
Physical specifications for SS 304 pipe flanges include design shapes and dimensions
- OD (Outside diameter) : is the space between two opposing edges of a flange’s face
- Nominal bore size : is the inner diameter (ID) of the steel flanges connector
- Thickness : thickness refers of the attaching outer rim
- Bolt circle diameter : is the length from the center of a bolt hole
- Pipe size : is a forged flange’s corresponding pipe size
International Standard for UNS S30400 Blind Flanges
304 Stainless Steel Flange Pressure Rating
Working pressure by (Class), BAR
Temperature Celsius |
Class 150 |
Class 300 |
Class 600 |
37.7778 |
275 |
720 |
1440 |
93.3333 |
230 |
600 |
1200 |
148.889 |
205 |
540 |
1080 |
204.444 |
190 |
495 |
995 |
260 |
170 |
465 |
930 |
315.556 |
140 |
435 |
875 |
343.333 |
125 |
430 |
860 |
371.111 |
110 |
425 |
850 |
398.889 |
95 |
415 |
830 |
426.667 |
80 |
405 |
805 |
454.444 |
65 |
395 |
790 |
482.222 |
50 |
390 |
780 |
510 |
35 |
380 |
765 |
537.778 |
20 |
320 |
640 |
565.5556 |
20 |
310 |
615 |
593.3333 |
20 |
255 |
515 |
621.1111 |
20 |
200 |
400 |
648.8889 |
20 |
155 |
310 |
676.6667 |
20 |
115 |
225 |
704.4444 |
20 |
85 |
170 |
732.2222 |
20 |
60 |
125 |
760 |
20 |
50 |
95 |
787.7778 |
15 |
35 |
70 |
815.5556 |
10 |
25 |
55 |
Table of Content