SMO 254 Flanges belong to the ASTM A182 specification with sizes ranging from ½ inches to 48 inches. There are different standards to govern the dimensions such as ASME, ANSI, DIN and other international standards. The UNS S31254 Pipe Flange is made under different production types such as the forged, screwed, threaded and plate flanges. There are also different functional types such as slip on flanges, lap joint flanges, orifice flanges, welded neck flanges and blind flanges. The blind flanges come in different types such as the SMO 254 Spectacle Blind Flange as well. Each different type of flange has a purpose to serve in an application. The face type of the flanges vary as well.
254 SMO Flange
UNS S31254 SMO Flange
6mo Plate Flange
There are raised face, flat face and ring type joint face types of flanges ranging from pressure classes 150 through 2500. The 6mo Plate Flange and other flanges are made from a chromium, nickel, molybdenum alloy. The material has 19% chromium, 17% nickel, 6% molybdenum with carbon, manganese, silicon, copper, sulfur and sulfur in it. The different types of flanges such as the 254 SMO Slip on Flange have good corrosion resistance due to the composition. The flanges are also stronger than the ordinary stainless steel flanges with 650MPa minimum tensile strength, 300MPa minimum yield strength and 35% elongation rate. The UNS S31254 Weld Neck Flange is preferred in welding applications. These flanges can hold the pipe in place during welding. The material has up to 1390 degrees Celsius melting point so that it could be used in high temperature and high pressure applications such as power generation, heat exchangers, boiler and petrochemical industrial applications.
Specifications | ASTM A182 / ASME SA182 |
Size | 1/2″ (15 NB) to 48″ (1200NB) |
Standards |
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Alloy 254 SORF Flanges
ASTM A182 SMO 254 Weld Neck Flanges
UNS S31254 Blind Flange
Stainless Steel 254 Threaded Flanges
SS 1.4547 Socket weld Flange
SMO 254 Lap Joint Flanges
ASTM A182 Alloy 254 Ring Type Joint Flange
UNS S31254 Orifice Flanges
6Moly Long Weld Neck Flanges
SMO 1.4547 Spectacle Blind Flange
SMO 254 Forged Flanges
ASTM A182 SMO 254 Plate Flange
Grade | C | Mn | Si | Cu | S | P | Mo | Ni | Cr |
SMO 254 | 0.02 | 1 | 0.08 | 0.5-1.0 | 0.01 | 0.03 | 6.0-6.5 | 17.5-18.5 | 19.5-20.5 |
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8 g/cm3 | 1320-1390 ℃ | 650 | 300 | 35 % |
Density (Kg.m-1) | 8000 |
Magnetic Permeability | <1.05 |
Young’s Modulus (N/mm2) | 200 x 103 |
Specific Heat, 20°C (J.Kg-1.°K-1) | 500 |
Specific Electrical Resistance, 20°C (µO.m) | 0.85 |
Thermal conductivity, 20°C | 13.5 |
STANDARD | WERKSTOFF NR. | UNS | SIS | BS | GOST | AFNOR | EN |
SMO 254 | 1.4547 | S31254 | 2378 | – | – | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |
ASME/ANSI B 16.5 | Welding Neck, Slip on, Blind, High Hub Blind, Socket Weld, Lap Joint, Threaded, Ring Type Joint |
PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
ASME/ANSI B 16.47 | Welding Neck, Blind [Series A & B] |
PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
ASME/ANSI B 16.36 | Welding Neck, Slip on, Threaded |
PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
BS 4504 SEC 3.1 | Welding Neck, Hubbed Slip on, Hubbed Threaded, Lapped Pipe End, Plate, Loose Plate, Loose Plate With Weld Neck, Blank |
PRESSURE CLASS | PN 2.5 TO PN 40 |
BS 4504[PART 1] | Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange |
PRESSURE CLASS | PN 2.5 TO PN 400 |
BS 1560 BOSS | Welding Neck Flange, Socket Welding Flange, Slip-On Flange, Blind Flange, Screwed Boss Flange, Lapped Flange |
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 |
Standard | Class | Diameter | Bolt Circle Diameter | Number of Bolts | Bolt Size | Diameter of Bolt Hole |
---|---|---|---|---|---|---|
AS4087 | PN14 | 95 | 67 | 4 | M12 | 14 |
AS 2129 Flange | 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) Flange | 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 |
AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) |
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