Stainless Steel 304 Flanges

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Stainless Steel 304 Flanges

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304 SS Flanges Table of Content

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Stainless Steel 304 Flanges Manufacturer & Supplier in Mumbai, India

SS 304 Slip On Flanges
SS 304 Slip On Flanges
A182 F304 SORF Flange
A182 F304 SORF Flange
SS 304 Weld Neck Flange
SS 304 Weld Neck Flange
Our speciality at Lakshya Steel is producing and distributing premium Stainless Steel 304 Flanges. Excellent strength and corrosion resistance abound from these flanges, which are composed of austenitic stainless steel with 18% chromium and 8% nickel. SS 304 flanges are appropriate for many different industrial uses since they have a minimum tensile strength of 515 MPa and a yield strength of 205 MPa. They can thus handle general corrosive situations.

Our selection of SS 304 flanges include several ASTM A182 F304 Slip-On Raised Face (SORF) flanges as well as Weld Neck Raised Face (WNRF) flanges. While the raised face gives extra surface for secure welding or bolting, the slip-on flanges are perfect for use with seamless pipes since they offer exact couplings. Conversely, the WNRF flanges fit for high-pressure uses since its welded neck guarantees a tight hold.

ASME SA182 SS 304 Blind Flanges, meant to terminate pipes at a designated location, are available here. Ideal for usage in high-temperature operations including heat exchangers, boilers, and condenser components, these flanges are also heat resistant and can run at temperatures as high as 870°C.

We provide DIN 1.4307 Screwed Flanges and more along with a variety of 304 Stainless Steel flanges in diameters ranging from ½ inch to 48 inches. Whether your needs call for SS 304 flanges for general service, thermal applications, or industrial pipes, Lakshya Steel has a whole range to fit your particular needs.

Please contact us to discuss your project needs or for further information on our stainless steel products and stainless steel 304 products including the most recent SS 304 flange price list.

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Stainless Steel 304 Flanges Specification

Stainless Steel 304 Flanges Specification
Specifications ASTM A182, A240 / ASME SA182, SA240
Standards ANSI Flanges, ASME Flanges, DIN Flanges, EN Flanges, BS Flanges, JIS Flanges, AWWA Flanges etc.
Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc
Size Range 1/2″ (15 NB) to 48″ (1200NB)
Pressure / Class 150#, 300#, 600#, 900#, 1500# & 2500#.
Flange Face Typee Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Stainless Steel 304 Flanges Chemical Composition

Grade C Mn Si P S Cr Mo Ni N
SS 304 0.08 max 2 max 0.75 max 0.045 max 0.030 max 18 – 20 – 8 – 11 –

304 Stainless Steel Flanges Mechanical Properties

Grade

Tensile Strength (MPa) min

Yield Strength 0.2% Proof (MPa) min

Elongation (% in 50mm) min

Hardness

Rockwell B (HR B) max

Brinell (HB) max

304

515

205

40

92

201

304 Stainless Steel Flanges Physical Properties

Grade

Density (kg/m3)

Elastic Modulus (GPa)

Mean Coefficient of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

Specific Heat 0-100°C (J/kg.K)

Electrical Resistivity (nΩ.m)

0-100°C

0-315°C

0-538°C

at 100°C

at 500°C

304

8000

193

17.2

17.8

18.4

16.2

21.5

500

720

Stainless Steel 304 Flanges Equivalent Grades

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 304 1.4301 S30400 SUS 304 304S31 08Х18Н10 Z7CN18‐09 X5CrNi18-10

SS 304 Flanges Dimensions

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS4087 PN14 95 67 4 M12 14
AS 2129 Flanges Table C 95 67 4 13 14
Table D 95 67 4 13 14
Table E 95 67 4 13 14
Table F 95 67 4 13 14
Table H 114 83 4 16 17
Table J 114 83 4 16 17
ANSI B16.5 ANSI 150 89 60 4 13 16
ANSI 300 95 67 4 13 16
ANSI 600 95 67 4 13 16
ANSI 900 121 83 4 19 22
ANSI 1500 121 83 4 19 22
ISO 7005 (DIN) Flanges PN6 80 55 4 M10 11
PN10 95 65 4 M12 14
PN16 95 65 4 M12 14
PN20 90 60.5 4 M14 16
PN25 95 65 4 M12 14
PN40 95 65 4 M12 14

304 Stainless Steel Flanges Weight Chart

Pipe Normal Diam.
O.D. Flange
Thk. Of Flange Min
Diam.
of
Hub
Diameter of Raised Face
Length Hub.Y
Thread Length
Diam. 
of Bolt
Circle
Diam. 
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
KG
LB
inch
dn
O
C
X
G
Y
T
BC
BH
BN
BD
1/2″
15
89.00
11.20
30.20
35.10
15.70
15.70
60.50
15.80
4
1/2″
0.4
0.9
3/4″
20
98.50
12.70
38.10
42.90
15.70
15.70
69.90
15.80
4
1/2″
0.7
1.5
1″
25
108.00
14.20
49.30
50.80
17.50
17.50
79.30
15.80
4
1/2″
0.8
1.8
1-1/4″
32
117.50
15.70
58.70
63.50
20.60
20.60
88.90
15.80
4
1/2″
1.2
2.6
1-1/2″
40
127.00
17.50
65.00
73.20
22.40
22.40
98.60
15.80
4
1/2″
1.5
3.3
2″
50
152.50
19.10
77.70
91.90
25.40
25.40
120.70
19.10
4
5/8″
2.3
5.1
2-1/2″
65
178.00
22.40
90.40
104.60
28.40
28.40
139.70
19.10
4
5/8″
3.7
8.1
3″
80
190.50
23.90
108.00
127.00
30.20
30.20
152.40
19.10
4
5/8″
4.1
9
3-1/2″
90
216.00
23.90
122.20
139.70
31.80
31.80
177.80
19.10
8
5/8″
5.1
11.2
4″
100
228.50
23.90
134.90
157.20
33.30
33.30
190.50
19.10
8
5/8″
5.9
13
5″
125
254.00
23.90
163.60
185.70
36.60
36.60
215.90
22.40
8
3/4″
7
15.4
6″
150
279.50
25.40
192.00
215.90
39.60
39.60
241.30
22.40
8
3/4″
8.4
18.5
8″
200
343.00
28.40
246.10
269.70
44.50
44.50
298.50
22.40
8
3/4″
13
28.6
10″
250
406.50
30.20
304.80
323.90
49.30
49.30
362.00
25.40
12
7/8″
18
39.5
12″
300
482.50
31.80
365.30
381.00
55.60
55.60
431.80
25.40
12
7/8″
29
64
14″
350
533.50
35.10
400.10
412.80
57.20
57.20
476.30
28.50
12
1″
39
86
16″
400
597.00
36.60
457.20
469.90
63.50
63.50
539.80
28.50
16
1″
47
103
18″
450
635.00
39.60
505.00
533.40
68.30
68.30
577.90
31.80
16
1 1/8″
57
126
20″
500
698.50
42.90
558.80
584.20
73.20
73.20
635.00
31.80
20
1 1/8″
76
167
24″
600
813.00
47.80
663.40
692.20
82.60
82.60
749.30
35.10
20
1 1/4″
97
214

Stainless Steel 304 Flanges Pressure Rating

ANSI/ASME B16.34 PRESSURE RATING CHART
Temperature °F 150# 300# 400# 600# 900# 1500# 2500#
-20 to 100 275 720 960 1440 2160 3600 6000
200 230 600 800 1200 1800 3000 5000
300 205 540 720 1080 1620 2700 4500
400 190 495 660 995 1490 2485 4140
500 170 465 620 930 1395 2330 3880
600 140 435 580 875 1310 2185 3640
650 125 430 575 860 1290 2150 3580
700 110 425 565 850 1275 2125 3540
750 95 415 555 830 1245 2075 3460
800 80 405 540 805 1210 2015 3360
850 65 395 530 790 1190 1980 3300
900 50 390 520 780 1165 1945 3240
950 35 380 510 765 1145 1910 3180
1000 20 320 430 640 965 1605 2675
1050 20 310 410 615 925 1545 2570
1100 20 255 345 515 770 1285 2145
1150 20 200 265 400 595 995 1655
1200 20 155 205 310 465 770 1285
1250 20 115 150 225 340 565 945
1300 20 85 115 170 255 430 715
1350 20 60 80 125 185 310 515
1400 20 50 65 95 145 240 400
1450 15 35 45 70 105 170 285
1500 10 25 35 55 80 135 230

Stainless Steel 304 Flanges Size Chart

Nominal Pipe Size Outside Diameter of Flanges Thickness of Flanges Diameter of Raised Face Diameter of Hub at Base Length Thru Hub Diameter or Bore Diameter of Hub at Bevel Radius of Fillet Depth of Socket
Welding Neck Slip-On Threaded Socket Lap Joint Slip-on Socket Lap Joint
O Q R X Y Y Y W B H r Z
1/2 3-1/2 7/16 1-3/8 1-3/16 1-7/8 5/8 5/8 .88 .90 .84 1/8 3/8
3/4 3-7/8 1/2 1-11/16 1-1/2 2-1/16 5/8 5/8 1.09 1.11 1.05 1/8 7/16
1 4-1/4 9/16 2 1-15/16 2-3/16 11/16 11/16 1.36 1.38 1.32 1/8 1/2
1-1/4 4-5/8 5/8 2-1/2 2-5/16 2-1/4 13/16 13/16 1.70 1.72 1.66 3/16 9/16
1-1/2 5 11/16 2-7/8 2-9/16 2-7/16 7/8 7/8 1.95 1.97 1.90 1/4 5/8
2 6 3/4 3-5/8 3-1/16 2-1/2 1 1 2.44 2.46 2.38 5/16 11/16
2-1/2 7 7/8 4-1/8 3-9/16 2-3/4 1-1/8 1-1/8 2.94 2.97 2.88 5/16 3/4
3 7-1/2 15/16 5 4-1/4 2-3/4 1-3/16 1-3/16 3.57 3.60 3.50 3/8 13/16
3-1/2 8-1/2 15/16 5-1/2 4-13/16 2-13/16 1-1/4 1-1/4 4.07 4.10 4.00 3/8 7/8
4 9 15/16 6-3/16 5-5/16 3 1-5/16 1-5/16 4.57 4.60 4.50 7/16 15/16
5 10 15/16 7.5/16 6-7/16 3-1/2 1-7/16 1-7/16 5.66 5.69 5.56 7/16 15/16
6 11 1 8-1/2 7-9/16 3-1/2 1-9/16 1-9/16 6.72 6.75 6.63 1/2 1-1/16
8 13-1/2 1-1/8 10-5/8 9-11/16 4 1-3/4 1-3/4 8.72 8.75 8.63 1/2 1-1/4
10 16 1-3/16 12-3/4 12 4 1-15/16 1-15/16 10.88 10.92 10.75 1/2 1-5/16
12 19 1-1/4 15 14-3/8 4-1/2 2-3/16 2-3/16 12.88 12.92 12.75 1/2 1-9/16
14 21 1-3/8 16-1/4 15-3/4 5 2-1/4 3-1/8 14.14 14.18 14.00 1/2 1-5/8
16 23-1/2 1-7/16 18-1/2 18 5 2-1/2 3-7/16 16.16 16.19 16.00 1/2 1-3/4
18 25 1-9/16 21 19-7/8 5-1/2 2-11/16 3-13/16 18.18 18.20 18.00 1/2 1-15/16
20 27-1/2 1-11/16 23 22 5-11/16 2-7/8 4-1/16 20.20 20.25 20.00 1/2 2-1/8
24 32 1-7/8 27-1/4 26-1/8 6 3-1/4 4-3/8 24.25 24.25 24.00 1/2 2-1/2

Types of Stainless Steel 304 Flanges Offered

Stainless Steel 304 Flanges Stainless Steel 304 EN 1092-1 Flanges
Stainless Steel 304 BS 4504 Flanges Stainless Steel 304 Forged Flanges
Stainless Steel UNS S30400 Flanges Stainless Steel 304 Slip on Flanges
SS 304 Flat Flange Suppliers ANSI 304 Stainless Steel Blind Flange
SS 304 Weld Neck Flanges Dealer SS 304 Socket weld Flanges Exporter
SS 304 Long Weld Neck Flanges Stockholder Steel 304 Threaded Flanges Distributors
Stainless Steel SUS 304 Reducing Flanges SS 304 Ring Type Joint Flanges Manufacturer
Stainless Steel DIN 1.4301 Orifice Flange Stainless Steel BS 304S31 Spectacle Blind Flanges
Stainless Steel 304 WNRF Flange Stainless 304 SORF Flanges
ANSI B16.5 SS 304 RTJ Flanges SS 304 Screwed Flanges Stockist
ASTM A182 SS 304 Lap Joint Flanges ASME SA182 SS 304 BLRF Flange
Stainless Steel 304 Raised Face Flanges 304 SS Nipoflange
A182 SS 304 Square Flanges ASME SA182M SS 304 SWRF Flange
Steel 304 Tongue & Groove Flanges SS 304 Male & Female Flanges
Stainless Steel 304 DIN Flanges SS 304 ASME B16.5 Flanges

304 Stainless Steel Flanges Application

304 Stainless Steel Flanges are widely used in various applications, including:

  • Petrochemical and chemical processing
  • Food and beverage industry
  • Oil and gas pipelines
  • Heat exchangers
  • Water treatment plants
  • Power generation
  • Pharmaceutical equipment
  • Marine and offshore platforms.
Applications

Why Choose Lakshya Steel?

At Lakshya Steel, we take great satisfaction in providing excellent Stainless Steel 304 Flanges made from premium raw materials obtained from reputable steel mills, so guaranteeing complete traceability and outstanding performance. While our custom engineering skills let us create flanges perfectly to your drawings or non-standard specifications, our modern CNC machining procedures guarantee great dimensional accuracy and a clean surface finish. Our strong inventory of ASTM A182 F304 Slip-On, Weld Neck, Blind, and Screwed Flanges spans ½’s to 48’s, so allowing us to accommodate both large-scale industrial projects and immediate needs. Perfect mechanical strength (≥515 MPa tensile strength) and corrosion and heat resistance—ideal for a variety of uses including pipelines, heat exchangers, boilers, and food-grade systems—showcase our SS 304 flanges. Supported by EN 10204 3.1 Mill Test Certificates, worldwide shipping, and affordable pricing, Lakshya Steel is your trusted friend for dependable, timely, reasonably priced stainless steel solutions. Get in touch to find out more about our products or ask for the most recent SS 304 flange price list catered to your project requirements.

Frequently Asked Questions (FAQs)

What is the main difference between SS 304 and SS 316 flanges?

Molybdenum (2–3%) included in SS 316 increases its resistance to strong chemicals and chlorides, therefore enhancing its suitability for marine or chemical service. SS 304 is perfect for general use and reasonably priced.

Are SS 304 flanges suitable for high-temperature service?

Indeed, in intermittent service SS 304 performs well up to 870°C and in continuous service it performs up to 925°C. SS 304L is advised to prevent sensitization, though, for long-term use above 425–860°C.

Do you offer SS 304 flanges in all pressure classes?

Absolutely. We supply SS 304 Flanges in all standard pressure ratings from Class 150 to Class 2500.

Is Stainless Steel 304 food-grade?

Yes, it’s widely used in food, dairy, and beverage industries due to its hygienic, non-reactive surface that doesn’t alter taste or promote bacteria.

What is the expected service life of SS 304 flanges?

Depending on the application, SS 304 flanges can last over 20 years with proper maintenance and within design parameters.

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