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Regarded to be the most basic stainless steel, the Stainless Steel 304 Flanges are also known as 18-8 grade with a higher content of chromium and low carbon content. The presence of low carbon content in the alloy restricts the formation of carbide precipitates during welding along with minimizing the 304 Stainless Flanges from being susceptible to intergranular corrosion. The high chromium content in the alloy provides the ASME B16.9 Sa 182 Gr F304 BLRF Flanges with resistance to oxidizing solutions such as nitric acid up to 55% weight and up to a temperature of 176°F. Flanges made from alloy 304 is also known to resists moderately aggressive organic acids like acetic acid. The nickel present in the alloy is what provides resistance to the ASTM A182 Gr F304 Flange in moderately reducing solutions for e.g. in pure phosphoric acid, whatever the concentration, in cold solutions as well as up to 10% diluted hot solutions.
Specification ASTM A182 Stainless Steel 304 Flanges covers forged or rolled alloy and stainless steel pipe flanges, along with forged fittings, valves and parts intended for use in high temperature applications.
At moderate temperatures, Werkstoff No 1.4301 SS 304 Flanges can also deliver a good performance in caustic solutions, especially those solutions that are free of chlorides or fluorides. Although grade 304 performs well in freshwater applications with low levels of chlorides i.e. less than 100 parts per million, exposure of the alloy to higher chloride levels makes the UNS S30400 304 Stainless Steel Flanges susceptible to both crevice corrosion and pitting.
| Gr. | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| ASTM A182 F304 | Minimum | – | – | – | – | – | 18.0 | – | 8.0 | – |
| Maximum | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
| Gr. | Tensile Strength (MPa) minimum | Yield Strength 0.2% Proof (MPa) minimum | Elongation (% in 50mm) minimum | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| Stainless Steel 304 Flanges | 515 | 205 | 40 | 92 | 201 |
| Specification : | Stainless Steel 304 Flanges |
| Supporting Flange Material: | Flanges Bolts, Ring Joint, Gasket |
| Design For Size: | JIS Flanges, ANSI Flanges, BS Flanges, EN Flanges, ASA Flanges, ASME Flanges, DIN Flanges, PN Flanges |
| Common Types of SS Flange : | Flanges 150 LB WNRF 600# BLRF Class 300 RTJ Class 900 SORF |
| Size Chart : | 1/2″ (15 NB) To 48″ (1200NB) |
| Production Process: | Forged, Heat Treated and Machined |
| Stainless Steel 304 Flanges Coating Flange Faces : | Zinc Plated, Yellow Transparent, Oil Black Paint, Anti-rust Paint, Cold and Hot Dip Galvanized |
| Application: | Chemical Industry Water Pipeline Industry Nuclear Power Plant Fabrication Industry Natural Gas Industry Oil And Gas Industry |
| Standards: | JIS Flanges, ISO Flanges, GOST Flanges, UNI Flanges, AWWA Flanges, MSS SP44 Flanges, ASME B16.5 Flanges, ASME B16.38 Flanges, EN-1092 Flanges, BS10 Flanges, DIN Flanges, PN Flanges, ASME B16.47 (Series A, Series B) Flanges |
| Pressure Rating Table: | Class 150 LBS, Class 300 LBS, Class 600 LBS, Class 900 LBS, Class 1500 LBS, Class 2500 LBS |
| Connect Type Type: | RF, FF, RTJ, LMF, SMF, LJF |
| Flange Machining Equipment: | Sand-blasting machine, Press machine, Bending machine, Pushing Machine, electric bevelling machine etc |
| NPS (in.) |
Stainless Steel 304 Flanges Dimensions | ||||
|---|---|---|---|---|---|
| Dia. of Flange (in.) |
No. of Bolts |
Dia. of Bolts (in.) |
Dia. of Bolt Holes (in.) |
Bolt Circle (in.) |
|
| 1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
| 1/2 | 3-1/2 | 4 | 1/2 | 0.62 | 2-3/8 |
| 3/4 | 3-7/8 | 4 | 1/2 | 0.62 | 2-3/4 |
| 1 | 4-1/4 | 4 | 1/2 | 0.62 | 3-1/8 |
| 1-1/4 | 4-5/8 | 4 | 1/2 | 0.62 | 3-1/2 |
| 1-1/2 | 5 | 4 | 1/2 | 0.62 | 3-7/8 |
| 2 | 6 | 4 | 5/8 | 0.75 | 4-3/4 |
| 2-1/2 | 7 | 4 | 5/8 | 0.75 | 5-1/2 |
| 3 | 7-1/2 | 4 | 5/8 | 0.75 | 6 |
| 3-1/2 | 8-1/2 | 8 | 5/8 | 0.75 | 7 |
| 4 | 9 | 8 | 5/8 | 0.75 | 7-1/2 |
| 5 | 10 | 8 | 3/4 | 0.88 | 8-1/2 |
| 6 | 11 | 8 | 3/4 | 0.88 | 9-1/2 |
| 8 | 13-1/2 | 8 | 3/4 | 0.88 | 11-3/4 |
| 10 | 16 | 12 | 7/8 | 1 | 14-1/4 |
| 12 | 19 | 12 | 7/8 | 1 | 17 |
| 14 | 21 | 12 | 1 | 1.12 | 18-3/4 |
| 16 | 23-1/2 | 16 | 1 | 1.12 | 21-1/4 |
| 18 | 25 | 16 | 1-1/8 | 1.25 | 22-3/4 |
| 20 | 27-1/2 | 20 | 1-1/8 | 1.25 | 25 |
| 24 | 32 | 20 | 1-1/4 | 1.38 | 29-1/2 |
ASTM A182 gr F304 Reducing Flanges
Stainless Steel 304 Weld Neck Flanges
A182 Gr F304 Blind Flanges
SS 304 Forged Flat Face Flanges
ASME SA182 F304 RTJ Flanges
SA 182 Gr F304 Raised Face Flanges
ASTM A182 Grade F304 Socket Weld Flanges
Stainless Steel 304 Slip On Flanges
Stainless Steel 304 Orifice Flanges
304 SS Spectacle Flanges
ASTM A182 F304 Long Weld Neck Flanges
Stainless Steel 304 Forged Flanges
| Gr. | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity(W/m.K) | Specific Heat 0-1000C(J/kg.K) | Electrical Resistivity (n.m) | |||
|---|---|---|---|---|---|---|---|---|---|
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| A182 304 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
| STANDARD | SA A182 F304 |
| DIN | 1.4301 |
| WERKSTOFF No. | 1.4301 |
| AFNOR | Z7CN18‐09 |
| BS | 304S31 |
| EN | SUS 304 |
| JIS | SUS 304 |
| GOST | 08Х18Н10 |
| UNS | S30400 |
| ASME | Pressure Temperature Ratings For Stainless Steel 304 Flanges | ||||||
| Temperature °F | Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 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 |
| Standard | Class | Dia. | Bolt Circle Dia. | Number of Bolts | Bolt Size | Dia. of Bolt Hole |
|---|---|---|---|---|---|---|
| AS4087 Flange | PN14 Flange | 95 | 67 | 4 | M12 | 14 |
| AS 2129 Flange | Table C Flange | 95 | 67 | 4 | 13 | 14 |
| Table D Flange | 95 | 67 | 4 | 13 | 14 | |
| Table E Flange | 95 | 67 | 4 | 13 | 14 | |
| Table F Flange | 95 | 67 | 4 | 13 | 14 | |
| Table H Flange | 114 | 83 | 4 | 16 | 17 | |
| Table J Flange | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 Flange | ANSI 150 Flange | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 Flange | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 Flange | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 Flange | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 Flange | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) Flange | PN6 Flange | 80 | 55 | 4 | M10 | 11 |
| PN10 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN16 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN20 Flange | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN40 Flange | 95 | 65 | 4 | M12 | 14 |