Stainless Steel 304 / 304L / 304H Flanges Manufacturer

Global Steel ltd. offers a wide variety of Stainless steel 304/304L/304H flanges. All products undergo our strict quality check to ensure top-notch quality.

Table Of content

Stainless steel 304 flange, often known as 18-8, is an austenitic stainless steel that includes at least 18 percent chromium and a minimum of 8% nickel. The chemical composition of these elements makes the stainless steel 304 steel flanges extremely resistant to corrosion along with making them easy to weld and form. However, pitting and crevice corrosion may take place in environments rich in chloride. Stainless steel 304 flanges have good resistance to oxidation in applications that require intermittent service up to 870°C and continuous service up to 925°C. It is due to these properties that stainless steel 304 flanges are the most widely used stainless steel flanges. Stainless steel 304 flanges are commonly used in industries like Breweries, dairy, food, and pharmaceutical production.

Stainless Steel 304L flange has comparatively less carbon than its stainless steel 304 counterpart. It provides excellent resistance to corrosion, pitting, and crevice at extreme temperatures of approximately 870 degrees C. Since its composition is lower in carbon, it can be welded with ease even in highly corrosive environments. It is recommended to use stainless steel 304L in applications that require continuous use at 425°C-860°C due to its resistance to carbide precipitation.

Stainless Steel 304H flange has a higher concentration of carbon in its composition and can be used in the fabrication of pipe fittings. This austenitic Stainless Steel alloy offers great properties such as high tensile strength, high yield strength, and excellent creep-rupture properties. It has good forming and deep drawing qualities. It is recommended to use stainless steel 304H flanges in applications where high strength is required in temperatures above 500°C and below 800°C. Stainless steel 304H flanges will retain aqueous corrosion resistance.

Specification of SS 304, 304L, 304H Flanges

Standards ASTM A182 / ASME SA182
Dimensions ANSI/ASME B16.5, B16.47 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)
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 304L 1.4306 / 1.4307 S30403 SUS 304L 3304S11 03Х18Н11 Z3CN18‐10 X2CrNi18-9 / X2CrNi19-11
SS 304H 1.4948 S30409 SUS 304H – – – –

Manufacturing Standards

ASME/ANSI B16.5 Blind Flange, High Hub Blind Flange, Slip on Flange, Welding Neck Flange, Socket Weld Flange, Ring Type Joint Flange, Lap Joint Flange, Threaded Flange
PRESSURE CLASS 150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B16.47 Blind Flange [Series A & B],Welding Neck Flange
PRESSURE CLASS 75, 150, 300, 400, 600, 900
ASME/ANSI B16.36 Orifice Flange
PRESSURE CLASS 300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1 Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange,
PRESSURE CLASS PN 2.5 TO PN 40
BS 4504[PART 1] Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS PN 2.5 TO PN 400
BS 1560 BOSS Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS 150, 300, 400, 600, 900, 1500, 2500
BS10 Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLE D, E, F, H
DIN FLANGES DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASS PN 6 TO PN 100

Different Types

Slip On Flanges

SS 304, 304L, 304H Slip On Flanges

Blind Flanges

SS 304, 304L, 304H Blind Flanges

Socket Weld Flanges

SS 304, 304L, 304H Socket Weld Flanges

Weld Neck Flange

SS 304, 304L, 304H Weld Neck Flanges

Reducing Flanges

SS 304, 304L, 304H Reducing Flanges

Orifice Flanges

SS 304, 304L, 304H Orifice Flanges

Contact us to get a quick quote for your requirement.

We offer These Stainless Steel 304 / 304L / 304L Flanges as per DIN, ASTM, ASME, BS, EN, JIS or ANSI Standard.

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Available Stock

  • 304L SS Flanges
  • SS 304H Spectacle Blind Flanges
  • UNS S30400 Male & Female Flanges
  • ANSI B16.5 Stainless Steel 304 Expander Flanges
  • ASME B16.47 SS 304L Spades Ring Spacers Flanges
  • ASTM A182 F304H Stainless Steel Flanges
  • Type 304H SS Industrial Forged Flanges
  • Stainless Steel 304 Tongue Flanges
  • SS 304H Groove Flanges
  • Stainless Steel 304L Plate Flange
  • UNS S30403 Stainless Steel Lap Joint Flanges
  • 304 Stainless Steel Nipoflange
  • SS 304H RTJ Flanges
  • Grade 304 Stainless Steel Flanges
  • INOX 304 Flanges
  • Stainless Steel 304H PN 10 Flange
  • SS 304L DIN Flanges
  • Stainless Steel 304 Spades Ring Spacers Flanges
  • 304L SS Weldo Flanges
  • Stainless Steel 304 Long Welding Neck Flange
  • Stainless Steel 304H Loose Flanges
  • SS 304L British Standard Table D Pipe Flanges
  • Stainless Steel 304L Nipo Flanges
  • SS 304 Flat Face Flanges
  • Stainless Steel 304H BS Standard Table E
  • 304L SS 150 LBS Threaded Flanges
  • SS 304L Lapped Joint Flanges
  • Stainless Steel 304L Screwed Flanges
  • SS 304H Flanges
  • SS 1.4306 1500 LBS Flanges
  • Austenitic Stainless Steel 304H Flanges
  • 304 SS Pipe Flange

Weight Chart

15mm (1/2″) Stainless Steel 304 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

Dimensions

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)
  • ASME B1.20.1, Pipe Threads, General Purpose
  • ASME B16.1, Cast Iron Flanges and Flanged Fittings Classes 25, 125 and 250
  • ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24
  • ASME B16.11, Forged Fittings, Socket Welding and Threaded
  • ASME B16.25, Buttwelding Ends
  • ASME B16.36, Orifice Flanges
  • ASME B16.47, Large Diameter Steel Flanges NPS 26 Through NPS 60
  • ASME B31.1, Power Piping
  • ASME B31.3, Process Piping
  • ASME B46.1, Surface Texture (Surface Roughness, Waviness, and Lay)

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

Chemical Structure

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 –
SS 304L 0.035 max 2 max 1.0 max 0.045 max 0.030 max 18 – 20 – 8 – 13 –
SS 304H 0.10 max 2 max 0.75 max 0.045 max 0.03 max 18 – 20 – 8 – 10.5 –

Mechanical Properties

Grade Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
SS 304 8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
SS 304L 8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
SS 304H 8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 40 %

We Serve Application Industry

Application Industry

ANSI / ASME 16.5, 16.48, 16.47 Flanges applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.

Oil & Gas Industry

Petrochemical Industry

Power Generation Industry

Chemical Industry

We Export Stainless Steel 304, 304L, 304H Flanges Across the Globe

New Zealand, Saudi Arabia, Turkey, Bolivia, Ireland, United Kingdom, Nigeria, Romania, Macau, Belgium, Argentina, Colombia, Brazil, Nepal, Vietnam, Poland, Spain, Estonia, Chile, Australia, Sweden, Philippines, South Africa, Namibia, Germany, Gabon, Netherlands, Israel, Malaysia, Denmark, Finland, Mongolia, Kenya, Bulgaria, Qatar, Trinidad & Tobago, India, Russia, Sri Lanka, Lebanon, South Korea, Azerbaijan, Tibet, Oman, Canada, Puerto Rico, Peru, Bahrain, Tunisia, Ukraine, Slovakia, Norway, Hungary, Switzerland, Kuwait, Lithuania, Lahore, Egypt, Algeria, Czech Republic, Greece, Portugal, Algiera, Kazakhstan, Angola, Italy, Bhutan, Ghana, Afghanistan, Serbia, Yemen, France, Croatia, Indonesia, United Arab Emirates, Iran, Hong Kong, China, Austria, United States, Thailand, Mexico, Pakistan, Belarus, Bangladesh, Taiwan, Costa Rica, Ecuador, Zimbabwe, Gambia, Venezuela, Japan, Singapore, Libya, Morocco, columbia, Jordan, Iraq.

Domestic Supply Stainless Steel 304, 304L, 304H Flanges

New Delhi, Jaipur, Pimpri-Chinchwad, Gurgaon, Chennai, Ludhiana, Howrah, Ernakulam , Indore, Haryana, Navi Mumbai, Faridabad, Hyderabad, Kanpur, Rajkot, Bhopal, Thiruvananthapuram, Ahmedabad, Kolkata, Visakhapatnam, Ranchi, Chandigarh, Jamshedpur, Bengaluru, Thane, Surat, Noida, Secunderabad, Pune, Nagpur, Nashik, mumbai.

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