Stainless steel 304 Flanges Manufacturer and Exporter
Stainless Steel 304 flanges are forged pipe fittings, which are applied in connecting the pipes, valves, and equipment to provide a secure and leak-free piping system. It is austenitic stainless steel, and they have about 18-20 percent chromium and 8-10.5 percent nickel, which gives it high corrosion properties and strength in different conditions. These stainless steel flanges are also characterized by good mechanical properties, which are high tensile strength, good ductility, and excellent weldability, thus suitable for low and moderately high temperature applications. As ASTM A182 F304 is made, they come in many standards, such as ANSI B16.5, and
are offered in sizes of 1/2 to 48 inches and in forms of weld neck, slip-on, and blind flanges. The stainless steel 304 flanges are commonly used in chemical processing, food and beverage, water treatment, and construction industries. Sometimes people get confused between 304 Stainless Steel vs 316 and it’s important to know the difference between them. Amardeep Steel is a reputable manufacturer and supplier of SS 304 flanges, stainless steel 304 plates & sheets, and other products in terms of quality assurance and supply.
What are the Stainless Steel 304 Flanges?
Stainless steel 304 flanges are the most used components in the pipe industries because it's specially designed to connect pipes, valves, and equipment in the industries application that provide a secure and leak-proof flow connection. Due to these features, these SS 304 Flanges are commonly used in some other industries also, such as oil & gas, chemical processing, water treatment, and food processing, where reliable leak-proofing is important. These flanges are made up of high-quality material by following the international standards in different classes, such as class 150, 300, 600 to 2500, which make it suitable for both low and high-pressure applications.
Specification of Stainless Steel 304 Flanges
Category |
Specification Details |
|---|---|
Material Specifications |
ASTM A182, A240 / ASME SA182, SA240 |
Manufacturing Standards |
ANSI, ASME, DIN, EN, BS, JIS, AWWA |
Dimensional Standards |
ASME B16.5, B16.47 (Series A & B), B16.48, BS4504, BS 10, EN-1092, DIN |
Size Range |
1/2″ (15 NB) to 48″ (1200 NB) |
Pressure Class |
150#, 300#, 600#, 900#, 1500#, 2500# |
Flange Face Types |
Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
SS 304 Flanges Chemical Composition
| Grade | C | Ni | Si | N | Mn | P | Cr | Mo | S | |
|---|---|---|---|---|---|---|---|---|---|---|
| SS 304 | Min. | — | 8.0 | — | — | — | — | 18.0 | — | — |
| Max. | 0.08 | 10.5 | 0.75 | 0.10 | 2.00 | 0.045 | 20.0 | — | 0.030 |
Mechanical Properties of SS 304 Flanges
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HR B) max | Hardness Brinell (HB) max |
|---|---|---|---|---|---|
| SS 304 | 515 | 205 | 40 | 92 | 201 |
Physical Properties of SS 304 Flanges
| Gr. | Density (kg/m³) | Elastic Modulus (GPa) | Mean CTE (µm/m/°C) 0–100°C | Mean CTE (µm/m/°C) 0–315°C | Mean CTE (µm/m/°C) 0–538°C | Thermal Conductivity (W/m·K) at 100°C | Thermal Conductivity (W/m·K) at 500°C | Specific Heat 0–100°C (J/kg·K) | Electrical Resistivity (n·m) |
|---|---|---|---|---|---|---|---|---|---|
| A182 304 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Equivalent Grades of Stainless Steel 304 (DIN 1.4301) Pipe Flanges
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SS 304 | 1.4301 | S30400 | SUS 304 | 304S31 | 08Х18Н10 | Z7CN18‑09 | X5CrNi18-10 |
HSN Code of SS 304 Flanges
| Description | HS Code |
|---|---|
| SS 304 Flanges | 73072100 |
Different Types of ASTM A182 Gr F304 Flanges
Weight Chart of Stainless Steel 304 Flanges in KG
| Pipe Size (NPS) | OD Flange (O) | Thk. (C) | Hub Dia. (X) | Raised Face (G) | Hub Length (Y) | Thread Length (T) | Bolt Circle (BC) | Hole Dia. (BH) | No. of Bolts (BN) | Bolt Dia. (BD) | Weight (KG) | Weight (LB) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2″ | 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″ | 98.50 | 12.70 | 38.10 | 42.90 | 15.70 | 15.70 | 69.90 | 15.80 | 4 | 1/2″ | 0.7 | 1.5 |
| 1″ | 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″ | 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″ | 127.00 | 17.50 | 65.00 | 73.20 | 22.40 | 22.40 | 98.60 | 15.80 | 4 | 1/2″ | 1.5 | 3.3 |
| 2″ | 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″ | 178.00 | 22.40 | 90.40 | 104.60 | 28.40 | 28.40 | 139.70 | 19.10 | 4 | 5/8″ | 3.7 | 8.1 |
| 3″ | 190.50 | 23.90 | 108.00 | 127.00 | 30.20 | 30.20 | 152.40 | 19.10 | 4 | 5/8″ | 4.1 | 9.0 |
| 3-1/2″ | 216.00 | 23.90 | 122.20 | 139.70 | 31.80 | 31.80 | 177.80 | 19.10 | 8 | 5/8″ | 5.1 | 11.2 |
| 4″ | 228.50 | 23.90 | 134.90 | 157.20 | 33.30 | 33.30 | 190.50 | 19.10 | 8 | 5/8″ | 5.9 | 13.0 |
| 5″ | 254.00 | 23.90 | 163.60 | 185.70 | 36.60 | 36.60 | 215.90 | 22.40 | 8 | 3/4″ | 7.0 | 15.4 |
| 6″ | 279.50 | 25.40 | 192.00 | 215.90 | 39.60 | 39.60 | 241.30 | 22.40 | 8 | 3/4″ | 8.4 | 18.5 |
| 8″ | 343.00 | 28.40 | 246.10 | 269.70 | 44.50 | 44.50 | 298.50 | 22.40 | 8 | 3/4″ | 13.0 | 28.6 |
| 10″ | 406.50 | 30.20 | 304.80 | 323.90 | 49.30 | 49.30 | 362.00 | 25.40 | 12 | 7/8″ | 18.0 | 39.5 |
| 12″ | 482.50 | 31.80 | 365.30 | 381.00 | 55.60 | 55.60 | 431.80 | 25.40 | 12 | 7/8″ | 29.0 | 64.0 |
| 14″ | 533.50 | 35.10 | 400.10 | 412.80 | 57.20 | 57.20 | 476.30 | 28.50 | 12 | 1″ | 39.0 | 86.0 |
| 16″ | 597.00 | 36.60 | 457.20 | 469.90 | 63.50 | 63.50 | 539.80 | 28.50 | 16 | 1″ | 47.0 | 103.0 |
| 18″ | 635.00 | 39.60 | 505.00 | 533.40 | 68.30 | 68.30 | 577.90 | 31.80 | 16 | 1 1/8″ | 57.0 | 126.0 |
| 20″ | 698.50 | 42.90 | 558.80 | 584.20 | 73.20 | 73.20 | 635.00 | 31.80 | 20 | 1 1/8″ | 76.0 | 167.0 |
| 24″ | 813.00 | 47.80 | 663.40 | 692.20 | 82.60 | 82.60 | 749.30 | 35.10 | 20 | 1 1/4″ | 97.0 | 214.0 |
ASTM A182 SS F304 Dimension Chart
| Standard / Class | Diameter (mm) | Bolt Circle (mm) | Number of Bolts | Bolt Size | Bolt Hole Dia. (mm) |
|---|---|---|---|---|---|
| AS4087 PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 (Table C, D, E, F) | 95 | 67 | 4 | 1/2″ (13mm) | 14 |
| AS 2129 (Table H, J) | 114 | 83 | 4 | 5/8″ (16mm) | 17 |
| ANSI 150 | 89 | 60 | 4 | 1/2″ (13mm) | 16 |
| ANSI 300 / 600 | 95 | 67 | 4 | 1/2″ (13mm) | 16 |
| ANSI 900 / 1500 | 121 | 83 | 4 | 3/4″ (19mm) | 22 |
| ISO 7005 (PN6) | 80 | 55 | 4 | M10 | 11 |
| ISO 7005 (PN10 / 16 / 25 / 40) | 95 | 65 | 4 | M12 | 14 |
| ISO 7005 (PN20) | 90 | 60.5 | 4 | M14 | 16 |
Pressure Rating Chart of A182 Gr 304 Stainless Steel Flange
| Temp (°F) | 150# | 300# | 400# | 600# | 900# | 1500# | 2500# |
|---|---|---|---|---|---|---|---|
| -20 to 100 | 285 | 720 | 960 | 1440 | 2160 | 3600 | 6000 |
| 200 | 260 | 600 | 800 | 1200 | 1800 | 3000 | 5000 |
| 300 | 230 | 540 | 720 | 1080 | 1620 | 2700 | 4500 |
| 400 | 200 | 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 |
SS 304 Flanges Schedule Chart
| Flange Schedule / Class | Pipe Size | Flange Connection Type | Max. Pressure |
|---|---|---|---|
| ASME B16.5 Class 150 | 1/2" | FNPT | 150 psi |
| ASME B16.5 Class 150 | 1/2" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 1/2" | Welded | 150 psi |
| ASME B16.5 Class 150 | 3/4" | FNPT | 150 psi |
| ASME B16.5 Class 150 | 3/4" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 1-1/4" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 1-1/2" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 2" | FNPT | 150 psi |
| ASME B16.5 Class 150 | 2" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 2-1/2" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 3" | Socket Weld | 275 psi |
| ASME B16.5 Class 150 | 4" | FNPT | 150 psi |
| ASME B16.5 Class 150 | 4" | Socket Weld | 275 psi |
| ASME B16.5 Class 300 | 1/2" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 1" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 1-1/4" | FNPT | 720 psi |
| ASME B16.5 Class 300 | 1-1/4" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 1-1/2" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 2" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 2-1/2" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 3" | Slip On | 720 psi |
| ASME B16.5 Class 300 | 4" | Slip On | 720 psi |
Size Chart of SS 304 WNRF Flanges
| NPS | Outside Diam. (O) | Thickness (Q) | Diam. of Raised Face (R) | Diam. of Hub Base (X) | Length Thru Hub: Weld Neck (Y) | Length Thru Hub: Slip-On/Threaded (Y) | Length Thru Hub: Lap Joint (Y) |
|---|---|---|---|---|---|---|---|
| 1/2" | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 |
| 3/4" | 3-7/8 | 1/2 | 1-1/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 |
| 1" | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 |
| 1-1/4" | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 |
| 1-1/2" | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 |
| 2" | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 |
| 2-1/2" | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 |
| 3" | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 |
| 3-1/2" | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 |
| 4" | 9 | 15/16 | 6-3/16 | 5-3/16 | 3 | 1-5/16 | 1-5/16 |
| 5" | 10 | 15/16 | 7-5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 |
| 6" | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 |
| 8" | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 |
| 10" | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 |
| 12" | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 |
| 14" | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 |
| 16" | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 |
| 18" | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 |
| 20" | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 |
| 24" | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 |
Price List of Stainless Steel 304 Flanges
| Product Description | Price in India (INR) | Price in UAE (AED) |
|---|---|---|
| ASTM A182 Grade F304 Blind Flange | Rs. 567.62 | UAE Dirham 29.39 |
| ASTM A182 Gr F304 Flanges | Rs. 212.86 | UAE Dirham 11.02 |
| 304 Stainless Steel Flanges (Standard) | Rs. 709.53 | UAE Dirham 36.74 |
| ASME SA182 F304 Pipe Flanges (Mumbai) | Rs. 276.72 | UAE Dirham 14.33 |
| ASTM A182 304 SS Plate Flanges | Rs. 993.34 | UAE Dirham 51.44 |
| ASTM A182 F304 Threaded Flanges | Rs. 567.62* | UAE Dirham 29.39* |
Note: Prices are indicative and updated regularly. Contact Kalpataru Piping for current pricing based on quantity, pressure class, and delivery terms.
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Frequently Asked Questions
What are Stainless Steel 304 flanges?
Stainless Steel 304 flanges are forged pipe fittings used to connect pipes, valves, and equipment in a piping system. They are known for their excellent corrosion resistance, durability, and suitability for general-purpose industrial applications.
What is ASTM A182 F304 flange?
ASTM A182 F304 refers to the standard specification for forged Stainless Steel 304 flanges used in high-temperature and pressure systems. It ensures the material meets required chemical composition and mechanical property standards.
What is the difference between 304 and 304L flanges?
The main difference is carbon content 304L has lower carbon than 304, which reduces carbide precipitation during welding. This makes 304L flanges more suitable for welded structures and corrosion-sensitive applications.
What are the uses of SS 304 flanges?
SS 304 flanges are widely used in industries such as chemical processing, food and beverage, water treatment, and construction. They are ideal for applications requiring corrosion resistance and reliable performance.
Who is the best stainless steel 304 flange manufacturer?
The best manufacturer depends on quality, certifications, and supply capability, but Amardeep Steel is recognized as a trusted supplier offering high-quality Stainless Steel 304 flanges with reliable performance and global standards compliance.
What is the temperature range for SS 304 flanges?
ASTM A182 F304 Stainless Steel Flanges are rated for service from -20°F to 1200°F (depending on pressure class), making them suitable for both cryogenic and moderately elevated temperature applications. Refer to the pressure-temperature rating chart above for class-specific limits.
