Check ASTM A350 LF2 Flanges Temperature Range, Carbon Steel A350 LF2 CL1 Flanges Chemical Composition.
ASTM A350 LF2 Flanges belongs to a specification of flanges that are made up of different low carbon steel alloys. These are either ring rolled or forged. The Carbon Steel A350 LF2 CL1 Flanges is usually supplied in normalized, quench, normalized and tempered or tempered conditions. The applications of these flanges vary throughout the oil and gas industries, the chemical industries and in fabrication industries. The flanges are intended for the low temperature services. The Ltcs A350 LF2 Blind Flange Dimensions vary according to the standards. These flanges usually range from ½ inches to 24 inches in diameter.
Carbon Steel A350 LF2 Flanges
A350 LF2 CL1 Flanges
ASTM A350 LF2 Flanges
LTCS A350 LF2 Blind Flange
A350 LF2 Welding Neck Flange
SA350 LF2 Class 1 Flanges
A350 LF2 Flanges Temperature Table
| ( Carbon Steel ASTM A350 LF2 Flanges) | |||||||
|---|---|---|---|---|---|---|---|
| Temperature (F°) | 150 Class | 300 Class | 400 Class | 600 Class | 900 Class | 1500 Class | 2500 Class |
| -20 to 100 | 285 | 740 | 985 | 1480 | 2220 | 3705 | 6170 |
| 200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5655 |
| 300 | 230 | 655 | 870 | 1310 | 1965 | 3270 | 5450 |
| 400 | 200 | 635 | 845 | 1265 | 1900 | 3170 | 5280 |
| 500 | 170 | 605 | 805 | 1205 | 1810 | 3015 | 5025 |
| 600 | 140 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
| 650 | 125 | 550 | 730 | 1100 | 1650 | 2745 | 4575 |
| 700 | 110 | 530 | 710 | 1060 | 1590 | 2655 | 4425 |
| 750 | 95 | 505 | 675 | 1015 | 1520 | 2535 | 4230 |
| 800 | 80 | 410 | 550 | 825 | 1235 | 2055 | 3430 |
| 850 | 65 | 320 | 425 | 640 | 955 | 1595 | 2655 |
| 900 | 50 | 230 | 305 | 460 | 690 | 1150 | 1915 |
| 950 | 35 | 135 | 185 | 275 | 410 | 685 | 1145 |
| 1000 | 20 | 85 | 115 | 170 | 255 | 430 | 715 |
ASTM A350 LF2 Flanges
Chemical Compatibility Of A350 LF2 CL1 Flanges And SA350 LF2 Flanges Mechanical Behavior
| A350 Lf2 Chemical Properties | A350 Lf2 Mechanical Properties | |
|---|---|---|
| C 0.30 Maximum | TS Min psi (Mpa) | 70,000 (485) |
| Mn 0.60 – 1.35 | YS Min psi (Mpa) | 36,000 (250) |
| Si 0.15 – 0.30 | EL (2″ Min) | 22% |
| P 0.035 Maximum | RA Min | 30% |
| S 0.040 Maximum | Hardness, Bhn | Maximum 197 |
| Cr 0.30 Maximum | -50ºF Charpy | Min Impact |
| Ni 0.40 Maximum | Energy F t/Lb (J):- | |
| Mo 0.12 Maximum | Set of 3 Specimen* | 15 (20) |
| V 0.08 Maximum | For One Specimen | 12 (16) |
| Cb 0.02 Maximum | ||
| Cu 0.04 Maximum | ||
| Pb 0.02 Maximum | ||
| Total Residuals = 0.50 | ||
Refer Ltcs A350 LF2 Blind Flange Equivalent Material, Specification Chart Of ASME B16.5 A350 LF2 Welding Neck Flange, Wn Flange LF2 Mechanical Properties.
LTCS A350 LF2 Blind Flange Equivalent
| Group Of Material | Common Name | Material Type | UNS | Forging Spec. | Casting Spec. Equivalent | DIN | DIN W. No | Application |
|---|---|---|---|---|---|---|---|---|
| Carbon Steel | CS | C-Si | K03504 | A105 | A216-WCB | C22.8 DIN 17243 | 1.0460 | General non-corrosive service from -29ºC (-20ºF) to 425ºC (800ºF) |
| LTCS | LTCS | C-Mn-Fe | K03011 | A350-LF2 | A352-LCB A352-LCC | TSTE 355 DIN 18103 | 1.0566 | General non-corrosive service from -46ºC (-50ºF) to 340ºC (650ºF), LF2 -46ºC ~ 425ºC |
| Low Alloy Steel | Nickel Steel | 3.1/2Ni | K32025 | A350-LF3 | A352-LC3 | 10Ni14 | 1.5637 | -101ºC (150ºF) to 340ºC (650ºF) |
A350 LF2 Welding Neck Flange Material Specification
| Specification | ASTM A350 LF2 Flanges |
| Material | ASTM A240, ASME SA240, ASTM A182, ASME SA182 |
| Production Technique | Machined, Forged, Heat Treated |
| Test | X-ray detector, Direct-reading Spectrograph, UI trasonic flaw detector, Magnetic particle detector, Hydrostatic testing machine, |
| Origin | West Europe / Japan / Indian / USA / Korean |
| Equipments | Sand-Blasting Machine, Press Machine, Electric Bevelling Machine, Bending Machine, Pushing Machine, etc. |
| ANSI | ANSI B16.47, MSS SP44, ANSI B16.48, ANSI B16.36, ANSI B16.5 |
| BS | BS4504 , BS4504, BS1560, BS10 |
| JIS | 16K 40K, 5K, 20K, 30K, 10K, 63K |
| DIN | DIN2637, DIN2638, DIN2641, DIN2642, DIN2655, DIN2527, DIN2573, DIN2576, DIN2633, DIN2634, DIN2635, DIN2627, DIN2628, DIN2636, DIN2566, DIN2656, DIN2629, DIN 2631, DIN2632, DIN2673 |
| Dimensions | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, and Custom Drawings Flanges |
| Size | 1/2" (15 NB) to 48" (1200NB) DN10~DN5000 |
| Pressure Rate | 300 LBS, 150 LBS, 1500 LBS, 2500 LBS, 600 LBS, 900 LBS |
| Facing Types | Ring Type Joint (RTJ), Raised Face (RF), Flat Face (FF), Large Tongue & Groove, Small Tongue, Lap-Joint Face (LJF), Large Male-Female (LMF), Small Male-Female (SMF), Groove |
| Value Added Services | Zinc Blindd, Antirust Paint, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized |
What is ASTM A350 LF2 Flanges?
The ASME B16.5 A350 LF2 Welding Neck Flange Rating gives an idea of the pressure containment capacities of the flanges. There are different classes in each category and they all have different pressure capacities and diameters. The ASME B16.34 standard governs the maximum allowed pressure for the flanges. Rajveer Stainless And Alloys is a manufacturer of flanges in this range. We supply any quantity of flanges according to the customer needs. The Carbon Steel A350 LF2 Flanges are primarily used in oil and gas, natural gas, petrochemical and petroleum refineries under low temperature conditions. The A350 LF2 Class 1 Flange has the ANSI pressure rating of 75.1 and is the most common class in this range. Please contact us for further technical information and product requirement.
Looking to buy SA350 LF2 Flanges Manufacturers In India? Contact Rajveer Stainless And Alloy, A Reliable A350 Lf2 Class 1 Material Supplier In Mumbai, Buy Sa350 Lf2 Steel Threaded Flanges Certified & Tested.
Types Of ASTM Carbon Steel A350 LF2 Flanges
6 Inch, Class 300, ANSI B16.5, ASTM A350 Lf2 Slip-on Flanges
8 Inch, 300Lb, EN 1092-1, DN200, PN16, Lf2 Forged Steel Slip On Flanges
8 Inch, Sch 40, 150 LB, ASTM A350 Lf2 Slip On Flanges
12 Inch, Sch 80, RF, Class 150, ASTM A350 Lf2 Slip-on Flanges
10 Inch, CL300, SCH STD, ASME B16.5, A350 Lf2 WN Flanges
30 Inch, 150LB, Raised Face, ASTM A350 Lf2 Weld Neck Flanges
12 Inch, SCH 40, 150 LB RF, ASTM A350 Lf2 Class 1 Weld Neck Flanges
30 Inch, Class 600 LB, RF, A350 Lf2 CL 2 Weld Neck Flanges
3 Inch, Class 300, SCH 40, Raised Face, CS A350 Lf2 Orifice Flanges
3 Inch, 300 LB, SCH 80, ASTM A350 Lf2 Orifice Flanges
3 Inch, 300 LB, RF, ANSI B16.36, A350 Lf2 WN Orifice Flanges
2 Inch, 300#, SCH 80, Lf2 Black Weld Neck Orifice Flanges
1/2 Inch, 150 LB, RF Carbon Steel A350 Lf2 Threaded Flanges
1 Inch, SCH 40, Class 300, RF Ends, ASTM Lf2 Dipped Galvanized Thread Flanges
2 1/2 Inch, 150#, FF, A350 Lf2 Class 2 Screw Thread Flanges
2 Inch x NPTF 1-1/2 Inch, RF, Black A350 Lf2 Threaded Flanges
2 Inch, ANSI B16.48, CL1500, A350 LF2 CL1 Spectacle Blind Flanges
DN 100, PN 50, ANSI B16.5, RF, ASTM A350 Blind Flanges
12 Inch, Class 300, ASTM A350 Lf2 Spectacle Blind Flanges
10 Inch, Class 600, ANSI B16.5, RF, Carbon Stel ASTM A350 Lf2 Blind Flange
A350 LF2 Flanges Dimensions Chart
Wn Flange LF2 Physical Properties
| Physical Properties | Cast Carbon Steel |
Forged |
|---|---|---|
| 0.30/0.35 C Maximum | A216-WCB | A105 |
| 0.25 C Maximum | A216-WCC | |
| LOW TEMPERATURE STEEL | ||
| 0.25/0.30 C Maximum | A352-LCB | A350-LF2 |
| 0.5 Mo | A352-LC1 | |
| 2.5 Ni | A352-LC2 | |
| 3.5 Ni | A352-LC3 | |
| C-MN-Si (0.25 Maximum) | A352-LCC | A350-LF3 |
| C-MN-Si-V (1.15~1.50 Mn) | A350-LF6 | |
A350 LF2 Steel Flanges Schedule Chart
| Size in Inch | Size in millimeter | O.D. | Thick. Of Flange | RF Dia. | RF Height | PCD | No of Bolts | Bolt Size UNC | Machine Bolt Length | RF Stud Length | Hole Size | ISO Stud Size | Weight in kilogram |
| A | B | C | D | E | |||||||||
| 1/2 | 15 | 90 | 9.6 | 34.9 | 2 | 60.3 | 4 | 1/2 | 50 | 55 | 5/8 | M14 | 0.9 |
| 3/4 | 20 | 100 | 11.2 | 42.9 | 2 | 69.9 | 4 | 1/2 | 50 | 65 | 5/8 | M14 | 0.9 |
| 1 | 25 | 110 | 12.7 | 50.8 | 2 | 79.4 | 4 | 1/2 | 55 | 65 | 5/8 | M14 | 0.9 |
| 1 1/4 | 32 | 115 | 14.3 | 63.5 | 2 | 88.9 | 4 | 1/2 | 55 | 70 | 5/8 | M14 | 1.4 |
| 1 1/2 | 40 | 125 | 15.9 | 73 | 2 | 98.4 | 4 | 1/2 | 65 | 70 | 5/8 | M14 | 1.8 |
| 2 | 50 | 150 | 17.5 | 92.1 | 2 | 120.7 | 4 | 5/8 | 70 | 85 | 3/4 | M16 | 2.3 |
| 2 1/2 | 65 | 180 | 20.7 | 104.8 | 2 | 139.7 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 3.2 |
| 3 | 80 | 190 | 22.3 | 127 | 2 | 152.4 | 4 | 5/8 | 75 | 90 | 3/4 | M16 | 4.1 |
| 3 1/2 | 90 | 215 | 22.3 | 139.7 | 2 | 177.8 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 5.9 |
| 4 | 100 | 230 | 22.3 | 157.2 | 2 | 190.5 | 8 | 5/8 | 75 | 90 | 3/4 | M16 | 7.7 |
| 5 | 125 | 255 | 22.3 | 185.7 | 2 | 215.9 | 8 | 3/4 | 85 | 95 | 7/8 | M20 | 9.1 |
| 6 | 150 | 280 | 23.9 | 215.9 | 2 | 241.3 | 8 | 3/4 | 85 | 100 | 7/8 | M20 | 11.8 |
| 8 | 200 | 345 | 27 | 269.9 | 2 | 298.5 | 8 | 3/4 | 90 | 110 | 7/8 | M20 | 20.5 |
| 10 | 250 | 405 | 28.6 | 323.8 | 2 | 362 | 12 | 7/8 | 100 | 115 | 1 | M24 | 32 |
| 12 | 300 | 485 | 30.2 | 381 | 2 | 431.8 | 12 | 7/8 | 100 | 120 | 1 | M24 | 50 |
| 14 | 350 | 535 | 33.4 | 412.8 | 2 | 476.3 | 12 | 1 | 115 | 135 | 1 1/8 | M27 | 64 |
| 16 | 400 | 595 | 35 | 469.9 | 2 | 539.8 | 16 | 1 | 115 | 135 | 1 1/8 | M27 | 82 |
| 18 | 450 | 635 | 38.1 | 533.4 | 2 | 577.9 | 16 | 1 1/8 | 125 | 145 | 1 1/4 | M30 | 100 |
| 20 | 500 | 700 | 41.3 | 584.2 | 2 | 635 | 20 | 1 1/8 | 140 | 160 | 1 1/4 | M30 | 130 |
| 24 | 600 | 815 | 46.1 | 692.2 | 2 | 749.3 | 20 | 1 1/4 | 150 | 170 | 1 3/8 | M33 | 196 |
Size Chart Of A350 Gr Lf2 Square Flanges
| Nominal Size Of Pipe Normal Size Of Pipe (inch) | |||||
|---|---|---|---|---|---|
| Dia. of Flange (inch) | No. of Bolts | Dia. of Bolts (inch) | Dia. of Bolt Holes (inch) | Bolt Circle (inch) | |
| 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 |
Material Of A350 Gr Lf2 Class 2 SORF Flanges
| Material | Fittings | Flanges | |||
| Carbon Steel | A234 Gr WPA | A105 | |||
| A234 Gr WPB | A105 | ||||
| Carbon Steel Alloy High-Temp |
A234 Gr WP1 | A182 Gr F1 | |||
| A234 Gr WP11 | |||||
| A234 Gr WP12 | |||||
| A234 Gr WP22 | |||||
| A234 Gr WP5 | |||||
| A234 Gr WP9 | A182 Gr F9 | ||||
| Carbon Steel Alloy Low-Temp |
A420 Gr WPL6 | A350 Gr LF2 | |||
| A420 Gr WPL3 | |||||
A350-Lf2-1 Forged Flanges Pressure Rating
| ASTM A350 Lf2 Flanges Pressure Class | ||||||||||||||||||
| Size Of Pipe | 150# | 300# | 600# | 900# | 1500# | 2500# | ||||||||||||
| Weld Neck | SORF | BLRF | Weld Neck | SORF | BLRF | Weld Neck | SORF | BLRF | Weld Neck | SORF | BLRF | Weld Neck | SORF | BLRF | Weld Neck | SORF | BLRF | |
| 1/2" | 2 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 2 | 1500# Schedule | 5 | 4 | 4 | 7 | 7 | 7 | ||
| 3/4" | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 3 | 3 | 1500# Schedule | 6 | 5 | 6 | 8 | 8 | 8 | ||
| 1" | 3 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 1500# Schedule | 9 | 8 | 8 | 12 | 11 | 11 | ||
| 1 1/2" | 4 | 3 | 3 | 7 | 6 | 6 | 8 | 7 | 8 | 1500# Schedule | 13 | 12 | 13 | 25 | 22 | 23 | ||
| 2" | 6 | 5 | 5 | 9 | 7 | 8 | 12 | 9 | 10 | 1500# Schedule | 25 | 25 | 25 | 42 | 37 | 39 | ||
| 2 1/2" | 8 | 7 | 7 | 12 | 10 | 12 | 18 | 13 | 15 | 1500# Schedule | 36 | 36 | 35 | 52 | 55 | 56 | ||
| 3" | 10 | 8 | 9 | 15 | 13 | 16 | 23 | 16 | 20 | 31 | 26 | 29 | 48 | 48 | 48 | 94 | 83 | 86 |
| 4" | 15 | 13 | 17 | 25 | 22 | 27 | 42 | 37 | 41 | 53 | 53 | 54 | 73 | 73 | 73 | 145 | 125 | 130 |
| 5" | 19 | 15 | 20 | 32 | 28 | 35 | 68 | 63 | 68 | 86 | 83 | 87 | 130 | 130 | 140 | 245 | 210 | 225 |
| 6" | 24 | 19 | 26 | 42 | 39 | 50 | 81 | 80 | 86 | 110 | 110 | 115 | 165 | 165 | 160 | 380 | 325 | 345 |
| 8" | 39 | 30 | 45 | 67 | 58 | 81 | 120 | 115 | 140 | 175 | 170 | 200 | 275 | 260 | 300 | 580 | 485 | 530 |
| 10" | 52 | 43 | 70 | 91 | 81 | 124 | 190 | 170 | 230 | 260 | 245 | 290 | 455 | 435 | 510 | 1075 | 930 | 1025 |
| 12" | 80 | 64 | 110 | 140 | 115 | 185 | 225 | 200 | 295 | 325 | 325 | 415 | 690 | 580 | 690 | 1525 | 1100 | 1300 |
| 14" | 110 | 90 | 140 | 180 | 165 | 250 | 280 | 230 | 355 | 400 | 400 | 520 | 940 | NA | 975 | NA | NA | NA |
| 16" | 140 | 98 | 180 | 250 | 190 | 295 | 390 | 330 | 495 | 495 | 425 | 600 | 1250 | NA | 1300 | NA | NA | NA |
| 18" | 150 | 130 | 220 | 320 | 250 | 395 | 475 | 400 | 630 | 680 | 600 | 850 | 1625 | NA | 1750 | NA | NA | NA |
| 20" | 180 | 165 | 285 | 400 | 315 | 505 | 590 | 510 | 810 | 830 | 730 | 1075 | 2050 | NA | 2225 | NA | NA | NA |
| 22" | 225 | 185 | 355 | 465 | 370 | 640 | 720 | 590 | 1000 | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 24" | 260 | 220 | 430 | 580 | 475 | 790 | 830 | 730 | 1250 | 1500 | 1400 | 2025 | 3325 | NA | 3625 | NA | NA | NA |
Material ASTM A350 Gr Lf2 Square Flanges Delivering Everywhere In India, Manufacting High-Class Fully Killed Gr Lf2 Cl1 Flat Flanges, Carbon Steel A350 Lf2 High Hub Flanges Available In A Wide Range Of Grades And Shapes.
Thickness Of A350 Lf2 Killed CS Flanges
| Normal Size Of Pipe | OD | Sch 10 | Sch 20 | Sch 30 | STD Wall | Sch 40 | Sch 60 | EXT Hvy | Sch 80 | Sch 100 | Sch 120 | Sch 140 | Sch 160 | XX Hvy |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½ | 0.84 | 0.083 | 0.109 | 0.109 | 0.147 | 0.147 | 0.188 | 0.294 | ||||||
| ¾ | 1.05 | 0.083 | 0.113 | 0.113 | 0.154 | 0.154 | 0.219 | 0.308 | ||||||
| 1 | 1.315 | 0.109 | 0.133 | 0.133 | 0.179 | 0.179 | 0.25 | 0.358 | ||||||
| 1 ¼ | 1.66 | 0.109 | 0.14 | 0.14 | 0.191 | 0.191 | 0.25 | 0.382 | ||||||
| 1 ½ | 1.9 | 0.109 | 0.145 | 0.145 | 0.2 | 0.2 | 0.281 | 0.4 | ||||||
| 2 | 2.375 | 0.109 | 0.154 | 0.154 | 0.218 | 0.218 | 0.344 | 0.436 | ||||||
| 2 ½ | 2.875 | 0.12 | 0.203 | 0.203 | 0.276 | 0.276 | 0.375 | 0.552 | ||||||
| 3 | 3.5 | 0.12 | 0.216 | 0.216 | 0.3 | 0.3 | 0.438 | 0.6 | ||||||
| 3 ½ | 4 | 0.12 | 0.226 | 0.226 | 0.318 | 0.318 | 0.636 | |||||||
| 4 | 4.5 | 0.12 | 0.237 | 0.237 | 0.337 | 0.337 | 0.438 | 0.531 | 0.674 | |||||
| 5 | 5.563 | 0.134 | 0.258 | 0.258 | 0.375 | 0.375 | 0.5 | 0.625 | 0.75 | |||||
| 6 | 6.625 | 0.134 | 0.28 | 0.28 | 0.432 | 0.432 | 0.562 | 0.719 | 0.864 | |||||
| 8 | 8.625 | 0.148 | 0.25 | 0.277 | 0.322 | 0.322 | 0.406 | 0.5 | 0.5 | 0.594 | 0.719 | 0.812 | 0.906 | 0.875 |
| 10 | 10.75 | 0.165 | 0.25 | 0.307 | 0.365 | 0.365 | 0.5 | 0.5 | 0.594 | 0.719 | 0.844 | 1 | 1.125 | 1 |
| 12 | 12.75 | 0.18 | 0.25 | 0.33 | 0.375 | 0.406 | 0.562 | 0.5 | 0.688 | 0.844 | 1 | 1.125 | 1.312 | 1 |
| 14 | 14 | 0.25 | 0.312 | 0.375 | 0.375 | 0.438 | 0.594 | 0.5 | 0.75 | 0.938 | 1.094 | 1.25 | 1.406 | |
| 16 | 16 | 0.25 | 0.312 | 0.375 | 0.375 | 0.5 | 0.656 | 0.5 | 0.844 | 1.031 | 1.219 | 1.438 | 1.594 | |
| 18 | 18 | 0.25 | 0.312 | 0.438 | 0.375 | 0.562 | 0.75 | 0.5 | 0.938 | 1.156 | 1.375 | 1.562 | 1.781 | |
| 20 | 20 | 0.25 | 0.375 | 0.5 | 0.375 | 0.594 | 0.812 | 0.5 | 1.031 | 1.281 | 1.5 | 1.75 | 1.969 | |
| 22 | 22 | 0.25 | 0.375 | 0.5 | ||||||||||
| 24 | 24 | 0.25 | 0.375 | 0.562 | 0.375 | 0.688 | 0.969 | 0.5 | 1.219 | 1.531 | 1.812 | 2.062 | 2.344 | |
| 26 | 26 | 0.375 | 0.5 | |||||||||||
| 30 | 30 | 0.312 | 0.5 | 0.625 | 0.375 | 0.5 | ||||||||
| 36 | 36 | 0.312 | 0.5 | 0.625 | 0.375 | 0.75 | 0.5 | |||||||
| 40 | 40 | 0.375 | 0.5 | |||||||||||
| 42 | 42 | 0.375 | 0.5 | |||||||||||
| 48 | 48 | …….. | …….. | …….. | 0.375 | …….. | …….. | 0.5 | …….. | …….. | …….. | …….. | …….. | …….. |
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LTCS A350 Lf2 Type
| Steel Type | Grade (forging) | Grade (cast) | Composition | Min Temperature |
|---|---|---|---|---|
| Austenitic | A182, F316 | A351 CF8M | 18Cr, 8Ni, 2Mo | -196ºC |
| Nickel Based Steel | A350 LF3 | A352 LC3 | 3 1/2Ni | -101ºC |
| Nickel Based Steel | NO EQUIV | A352 LC2 | 2 1/2Ni | -73ºC |
| Low Temp Carbon Steel | NO EQUIV | A352 LC1 | 0.5Mo | -59ºC |
| Low Temp Carbon Steel | A350 LF2 | A352 LCB | Carbon Steel | -46ºC |
A350 LF2 Flanges Tensile Properties
| A350 LF1 and A350 LF5 Class 1 | LF2 Classes 1 and A350 Class 2 | LF3 Classes 1 and LF 5 Class 2 | LF 6 | LF 9 | LF 787 | |||
|---|---|---|---|---|---|---|---|---|
| Class 1 | Class | Class 2 | Class 3 | |||||
| Tensile strength, ksi [MPa] | 60-85 [415- 585] | 70-95 [485- 655] | 70-95 [485- 655] | 66-91 [455-630] | 75-100 [515-690] | 63-88 [435- 605] | 65-85 [450-585] | 75-95 [515-655] |
| Yield strength, min, ksi [MPa]B,C Elongation: | 30 [205] | 36 [250] | 37.5 [260] | 52 [360] | 60 [415] | 46 [315] | 55 [380] | 65 [450] |
| Standard round specimen, or small proportional specimen, min % in | 25 | 22 | 22 | 22 | 20 | 25 | 20 | 20 |
| 4D gage length Strip specimen to wall thickness 5⁄16 in. (7.94 mm) and over and for all small sizes tested in full section; min % in 2 in. (50 mm) | 28 | 30 | 30 | 30 | 28 | 28 | 28 | 28 |
| Equation for calculating min elongation for strip specimens thinner than 5⁄16 in. (7.94 mm); min % in 2 in. (50 mm) t p actual thickness in inches | 48t+13 | 48t+15 | 48t+15 | 48t+15 | 48t+13 | 48t+13 | 48t+13 | 48t+13 |
| Reduction of area, min, % | 38 | 30 | 35 | 40 | 40 | 38 | 45 | 45 |
ASME A350 LF2 CL2 Flanges Thermal Expansion
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@0-100°C/32-212°F) | 10.4 µm/m°C | 5.78 µin/in°F |
| Thermal conductivity | 21.6 W/mK | 150 BTU in/hr.ft².°F |
Difference Between A350 lf2 Class 1 And Class 2 Flange
The SA350 LF2 Flanges are in the range of ½ inches to 48 inches in nominal diameter. There are different pressure classes ranging from 150 to 2500. The class 1 and 2 flanges can have pressures from 6bars to 40 bars and can come in different finishes such as oil black paint, zinc plated and hot dip galvanized. The difference is that the class 2 flanges have slightly higher mechanical properties. The class 1 flanges are the most commonly used where the class 2 flanges are used in specific applications. They both can be made as forged, threaded or screwed.