ASTM A350 LF2 Flanges
LTCS SA350 LF2 CL1 Blind Flange and LF2 Class 2 Weld Neck Flanges manufacturer in India.

ASTM A350 Lf2 Flanges

Carbon Steel A350 Lf2 Flanges

A350 Lf2 Class 1 Weld Neck Flanges
Table Of Contents
- What Does A350 Lf2 Mean?
- What Use Of A350 Lf2 Class 1 Weld Neck Flanges?
- LTCS Blind Flange Used Seal The Open End Of A Pipe?
- A350 Lf2 Flange Price
- SA A350 Lf2 Material Specification
- ASTM A350 Lf2 Class 1 Chemical Composition
- ASTM A350 LF2 Class 1 Mechanical Properties
- Carbon Steel A350 Lf2 Flanges Physical Properties
- A350 Lf2 Cl1 Yield Strength
- Low Temperature Carbon Steel Flange Pressure Rating Type
- ASTM A350 Lf2 Class 1 Equivalent
- ASTM A350 LF2 Flanges Tensile Properties
- SA350 Lf2 Flanges Thermal Expansion
- A350 Lf2 Pressure-Temperature Rating
- Standard Dimensions Of LTCS Flange
- ASTM A350 Standard Schedule Chart
- LTCS A350 LF2 Flanges Thickness Calculation
- A350 Lf2 Blind Flange Tolerance Formula
- ASME SA 350 GR LF2 Bolt Chart
- Low Temperature Carbon Steel Slip On Flange Gasket Size Chart
- Buy Types Of ASTM A350 LF2 Flanges Best Price And Fast Delivery


What Does A350 Lf2 Mean?
A350 Lf2 are made up of general carbon steel. The material can be supplied as normalized, normalized quenched or normalized tempered conditions. Carbon Steel A350 LF2 Flange vary in shape and sizes, and their dimensions differ. SA350 LF2 Flanges can be categorized into two main standards according to the bore diameter. The B16.5 standard which covers the range of ½ inch to 24 inches and the B16.47 standard which covers the range of 26 inches up to 60 inches are the two main standards. ASTM A350 LF2 Flanges can be open or closed.
What Use Of A350 Lf2 Class 1 Weld Neck Flanges?
Depending on their use case they can have raised faces or flat faces. Special cases like the A350 Lf2 Class 1 Weld Neck Flange have welded necks attached for extra grip and welding surface onto the piping. There are ring type joint flanges which are used with grooves in them so that a gasket can fit in between and make the connection tighter.
LTCS Blind Flange Used Seal The Open End Of A Pipe?
low temperature carbon steel blind flange are affordable and could be worked under cold condition but their corrosion resistance is not as good as the alloy flanges. A350 LF2 Blind Flange is a type of A350 LF2 class which is used to seal the open end of a pipe rather than connecting two pipes together. The A350 LF2 Class 2 is important in connections where higher bending stress is expected. The extra length and surface provided by the welded neck holds the connection under bending stress and without breaking. LTCS Blind Flange is a low temperature carbon steel forged flange. It usually comes with a flat plate at one end with bolting holes to connect it to the pipe. Ltcs Astm A350 LF2 Flanges available in different dimensions and shapes from Rajtilak Metal. A350 LF2 Steel Flanges can be used in applications which require moderate strength. The A350 LF2 Carbon Steel Blind Flanges could be used to seal open endings in a moderate impact toughness requirement but with less corrosion risks.
A350 Lf2 Flange Price | |||||
---|---|---|---|---|---|
Type Of Flanges | Size | Material | Class | Price In India (INR) | |
Blind Flanges | 3/4" | ASTM A350 Lf2 | Class 150 | 210.00 | |
BLRF | 1" | ASTM A350 Lf2 | Class 150 | 350.00 | |
BLRF | 1-1/2" | ASTM A350 Lf2 | Class 150 | 460.00 | |
BLRF | 2" | ASTM A350 Lf2 | Class 150 | 699.00 | |
Weld Neck Flanges | 2" X SCH STD | ASTM A350 Lf2 | Class 150 | 530.45 | |
WNRF | 3" X SCH STD | ASTM A350 Lf2 | Class 150 | 820.45 | |
WNRF | 4" X SCH STD | ASTM A350 Lf2 | Class 150 | 920.45 | |
WNRF | 6" X SCH STD | ASTM A350 Lf2 | Class 150 | 1650.45 | |
Slip On Flanges | 2" | ASTM A350 Lf2 | Class 150 | 330.34 | |
SORF | 3" | ASTM A350 Lf2 | Class 150 | 470.34 | |
SORF | 10" | ASTM A350 Lf2 | Class 150 | 2400.34 | |
SORF | 20" | ASTM A350 Lf2 | Class 150 | 10800 | |
Socket Weld Flanges | 3/4" X SCH XS | ASTM A350 Lf2 | Class 150 | 210.00 | |
SWRF | 1" X SCH XS | ASTM A350 Lf2 | Class 150 | 350.76 | |
SWRF | 1-1/2” X SCH XS | ASTM A350 Lf2 | Class 150 | 540.00 |
Please note this is an approx Price of ASTM A350 LF2 flanges in India. For final A350 Lf2 Class 1 Price List Please Call on 91 - 22 - 67437342 or drop an Email to info@rajtilakmetal.com.

Find here A350 Lf2 Temperature Range, SA A350 Lf2 Material Specification, & LTCS A350 LF2 Slip On Flange Weight Chart.
SA A350 Lf2 Material Specification
Material Specification Of : | ASTM A350 LF2 Flanges |
---|---|
Pressure Rating | Class 150 To Class 2500 |
High Temperature | Above 200°C (400°F) For Class 150 Or Above 400°C (750°F) |
Low Temperature | Above -29 Degree C (−20°F) |
Common Types Of Flanges: | Slip On (SORF) Flanges, Weld Neck (WNRF) Flanges, Blind (BLRF) Flanges, Lap Joint (Loose) Flanges, Threaded (NPT) Flanges, Socket-Weld (SWRF) Flanges |
Special Types Of Flanges : | Nipoflange, Elboflange, Latroflange, Swivel Flanges, Expanding Flanges, Reducing Flanges, Weldoflange |
Marking Standard | Name of Manufacturer Schedule Type of Flange Facing Nominal Pipe Size Pressure Class ASME B16 Designation |
Standard Cover : | pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing |
Contact Faces | RTJ (Ring Type Joint) Flanges, FF (Flat Face) Flanges, RF (Raised Face) Flanges, T/G (Tongue And Groove ) Flanges, M/F (Male And Female) Flanges |
Size Chart | Normal Pipe Size 1/2 to NPS 24" |
Thickness | Normal Pipe Size ≤ 18 |
Bore Diameter | Normal Pipe ≤ 10 |
Flanges Standards | EN 1092-1 Flanges, JIS Flanges, ASME B16.5 Flanges, ASME B16.47 type A Flanges, UNI Flanges, DIN Flanges |
Bolt Type | high strength bolts medium strength bolts low strength bolts |
European Standard Flanges | JIS B2220 Flanges (5k to 30k) and KS1503 flanges |
Russian-Standard Flanges | GOST 12820 / 12821-80 Flanges, DIN Flanges, UNI Flanges, EN 1092-1 Flanges |
South African Standard Flanges | SANS flanges And SABS flanges |
Surface Finish | smooth, concentric serrated, stock |
Gaskets Types | Full Face Gasket Flanges Flat Ring Gasket Flanges Metallic Ring Gakset Flanges |
Advantages Of Pipe Flange | Used to Connect Pipe System Easy Repair Pipe System Assembled Without Welding |
ASTM A350 Lf2 Chemical Composition And Check Low Temperature Carbon Steel A350 Lf2 Blind Flanges Dimensions Chart.
ASTM A350 Lf2 Class 1 Chemical Composition And Mechanical Properties
Chemical Composition | 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 |
Carbon Steel A350 Lf2 Flanges Physical Properties
- Class 1 HB: after heat treatment
- Yield Strength: > 250 MPa
- Tensile Strength: 485 - 655 MPa
- Elongation: > 22 %
- Hardness HB: < 197
- Reduction of area: > 30 %
- Impact energy KV -50°F [-45°С]: > 16 J
A350 Lf2 Cl1 Yield Strength
PHYSICAL PROPERTIES KEY | CAST CARBON STEEL (CS) |
FORGED |
---|---|---|
0.30/0.35 C Maximum | A216-WCB | A105 |
0.25 C Maximum | A216-WCC | |
LOW TEMPERATURE CARBON STEEL (LTCS) | ||
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 |
Low Temperature Carbon Steel Flange Pressure Rating 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 (LTCS) | NO EQUIV | A352 LC1 | 0.5Mo | -59ºC |
Low Temp Carbon Steel (LTCS) | A350 LF2 | A352 LCB | Carbon Steel | -46ºC |
ASTM A350 Lf2 Class 1 Equivalent
Group Of Material | Common Name Of Material | Type Of Material | UNS | Forging Spec. | Casting Spec. Equivalent | DIN | DIN W. No | Application |
---|---|---|---|---|---|---|---|---|
Carbon Steel (CS) | CS | C-Si | K03504 | A105 | A216-WCB | C22.8 DIN 17243 | 1.0460 | General non-corrosive service from -29ºC (-20ºF) to 425ºC (800ºF) |
Low Temperature Carbon Steel (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 Temperature Alloy Steel (LTAS) | Nickel Steel | 3.1/2Ni | K32025 | A350-LF3 | A352-LC3 | 10Ni14 | 1.5637 | -101ºC (150ºF) to 340ºC (650ºF) |
SA350 Lf2 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 |
ASTM A350 LF2 Flanges Tensile Properties For Room Temperature
LF1 and LF5 CL 1 | LF2 CL 1 and 2 | LF3 CL 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, minimum, 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, minimum % 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; minimum % in 2 in. (50 mm) | 28 | 30 | 30 | 30 | 28 | 28 | 28 | 28 |
Equation for calculating minimum elongation for strip specimens thinner than 5⁄16 in. (7.94 mm); minimum % 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, minimum, % | 38 | 30 | 35 | 40 | 40 | 38 | 45 | 45 |
Pressure Rating Chart Of A350 Gr Lf2 Class 1 Weld Neck Flange And LTCS A350 Lf2 Socket Weld Flanges Thickness Calculation.
A350 Lf2 Pressure-Temperature Rating
TEMP °C |
Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500 |
-29 TO 38 | 19.6 | 51.1 | 68.1 | 102.1 | 153.2 | 255.3 | 425.5 |
50 | 19.2 | 50.1 | 66.8 | 100.2 | 150.4 | 250.6 | 417.7 |
100 | 17.7 | 46.6 | 62.1 | 93.2 | 139.8 | 233 | 388.3 |
150 | 15.8 | 45.1 | 60.1 | 90.2 | 135.2 | 225.4 | 375.6 |
200 | 13.8 | 43.8 | 58.4 | 87.6 | 131.4 | 219 | 365 |
250 | 12.1 | 41.9 | 55.9 | 83.9 | 125.8 | 209.7 | 349.5 |
300 | 10.2 | 39.8 | 53.1 | 79.6 | 119.5 | 199.1 | 331.8 |
325 | 9.3 | 38.7 | 51.6 | 77.4 | 116.1 | 193.6 | 322.6 |
350 | 8.4 | 37.6 | 50.1 | 75.1 | 112.7 | 187.8 | 313 |
375 | 7.4 | 36.4 | 48.5 | 72.7 | 109.1 | 181.8 | 303.1 |
400 | 6.5 | 34.7 | 46.3 | 69.4 | 104.2 | 173.6 | 289.3 |
425 | 5.5 | 28.8 | 38.4 | 57.5 | 86.3 | 143.8 | 239.7 |
450 | 4.6 | 23 | 30.7 | 46 | 69 | 115 | 191.7 |
475 | 3.7 | 17.4 | 23.2 | 34.9 | 52.3 | 87.2 | 145.3 |
500 | 2.8 | 11.8 | 15.7 | 23.5 | 35.3 | 58.8 | 97.9 |
538 | 1.4 | 5.9 | 7.9 | 11.8 | 17.7 | 29.5 | 49.2 |
Standard Dimensions Of LTCS Flange

NPS | O.D. of Flange | Flanges Thickness | Diameter of RF | Diameter of Hub at Base | Lengtd Tdru Hub | Bore or Diameter | Dia. of Hub at Bevel | Radius of Fillet | Deptd of Socket | |||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Welding (WN) Neck | Slip-On (SORF) Threaded (NPT) Socket (SWRF) | Lap Joint (Loose) | Slip-on (SORF) Socket (SWRF) | Lap Joint (Loose) | ||||||||
O | Q | R | X | Y | Y | Y | W | B | H | r | Z | |
1/2 | 3-1/2 | 7/16 | 1-3/8 | 1-3/16 | 1-7/8 | 5/8 | 5/8 | .88 | .90 | .84 | 1/8 | 3/8 |
3/4 | 3-7/8 | 1/2 | 1-11/16 | 1-1/2 | 2-1/16 | 5/8 | 5/8 | 1.09 | 1.11 | 1.05 | 1/8 | 7/16 |
1 | 4-1/4 | 9/16 | 2 | 1-15/16 | 2-3/16 | 11/16 | 11/16 | 1.36 | 1.38 | 1.32 | 1/8 | 1/2 |
1-1/4 | 4-5/8 | 5/8 | 2-1/2 | 2-5/16 | 2-1/4 | 13/16 | 13/16 | 1.70 | 1.72 | 1.66 | 3/16 | 9/16 |
1-1/2 | 5 | 11/16 | 2-7/8 | 2-9/16 | 2-7/16 | 7/8 | 7/8 | 1.95 | 1.97 | 1.90 | 1/4 | 5/8 |
2 | 6 | 3/4 | 3-5/8 | 3-1/16 | 2-1/2 | 1 | 1 | 2.44 | 2.46 | 2.38 | 5/16 | 11/16 |
2-1/2 | 7 | 7/8 | 4-1/8 | 3-9/16 | 2-3/4 | 1-1/8 | 1-1/8 | 2.94 | 2.97 | 2.88 | 5/16 | 3/4 |
3 | 7-1/2 | 15/16 | 5 | 4-1/4 | 2-3/4 | 1-3/16 | 1-3/16 | 3.57 | 3.60 | 3.50 | 3/8 | 13/16 |
3-1/2 | 8-1/2 | 15/16 | 5-1/2 | 4-13/16 | 2-13/16 | 1-1/4 | 1-1/4 | 4.07 | 4.10 | 4.00 | 3/8 | 7/8 |
4 | 9 | 15/16 | 6-3/16 | 5-5/16 | 3 | 1-5/16 | 1-5/16 | 4.57 | 4.60 | 4.50 | 7/16 | 15/16 |
5 | 10 | 15/16 | 7.5/16 | 6-7/16 | 3-1/2 | 1-7/16 | 1-7/16 | 5.66 | 5.69 | 5.56 | 7/16 | 15/16 |
6 | 11 | 1 | 8-1/2 | 7-9/16 | 3-1/2 | 1-9/16 | 1-9/16 | 6.72 | 6.75 | 6.63 | 1/2 | 1-1/16 |
8 | 13-1/2 | 1-1/8 | 10-5/8 | 9-11/16 | 4 | 1-3/4 | 1-3/4 | 8.72 | 8.75 | 8.63 | 1/2 | 1-1/4 |
10 | 16 | 1-3/16 | 12-3/4 | 12 | 4 | 1-15/16 | 1-15/16 | 10.88 | 10.92 | 10.75 | 1/2 | 1-5/16 |
12 | 19 | 1-1/4 | 15 | 14-3/8 | 4-1/2 | 2-3/16 | 2-3/16 | 12.88 | 12.92 | 12.75 | 1/2 | 1-9/16 |
14 | 21 | 1-3/8 | 16-1/4 | 15-3/4 | 5 | 2-1/4 | 3-1/8 | 14.14 | 14.18 | 14.00 | 1/2 | 1-5/8 |
16 | 23-1/2 | 1-7/16 | 18-1/2 | 18 | 5 | 2-1/2 | 3-7/16 | 16.16 | 16.19 | 16.00 | 1/2 | 1-3/4 |
18 | 25 | 1-9/16 | 21 | 19-7/8 | 5-1/2 | 2-11/16 | 3-13/16 | 18.18 | 18.20 | 18.00 | 1/2 | 1-15/16 |
20 | 27-1/2 | 1-11/16 | 23 | 22 | 5-11/16 | 2-7/8 | 4-1/16 | 20.20 | 20.25 | 20.00 | 1/2 | 2-1/8 |
24 | 32 | 1-7/8 | 27-1/4 | 26-1/8 | 6 | 3-1/4 | 4-3/8 | 24.25 | 24.25 | 24.00 | 1/2 | 2-1/2 |
ASTM A350 Standard Schedule Chart
Nominal Pipe Sizes (NPS) | Slip On (SORF) | Threaded (NPT) | Socket Weld (SWRF) | Lap Joint (Loose) | Blind (BLRF) | Weld Neck (WRNR) |
---|---|---|---|---|---|---|
½ | 1 | 1 | 2 | 1 | 2 | 2 |
¾ | 2 | 2 | 2 | 2 | 2 | 2 |
1 | 2 | 2 | 2 | 2 | 2 | 3 |
1¼ | 3 | 3 | 3 | 3 | 3 | 3 |
1½ | 3 | 3 | 3 | 3 | 4 | 4 |
2 | 5 | 5 | 5 | 5 | 5 | 6 |
2½ | 8 | 8 | 8 | 8 | 7 | 10 |
3 | 9 | 9 | 9 | 9 | 9 | 11.5 |
3½ | 11 | 12 | 11 | 11 | 13 | 12 |
4 | 13 | 13 | 13 | 13 | 17 | 16.5 |
5 | 15 | 15 | 15 | 15 | 20 | 21 |
6 | 19 | 19 | 19 | 19 | 27 | 26 |
8 | 30 | 30 | 30 | 30 | 47 | 42 |
10 | 43 | 43 | 43 | 43 | 70 | 54 |
12 | 64 | 64 | 64 | 64 | 123 | 88 |
14 | 90 | 90 | 90 | 105 | 140 | 114 |
16 | 106 | 98 | 98 | 140 | 180 | 140 |
18 | 130 | 130 | 130 | 160 | 220 | 165 |
20 | 165 | 165 | 165 | 195 | 285 | 197 |
22 | 185 | 185 | 185 | 245 | 355 | 225 |
24 | 220 | 220 | 220 | 275 | 430 | 268 |
LTCS A350 LF2 Flanges Thickness Calculation
ASTM A350 LF2 Flanges Wall Thickness | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
NPS (Normal Pipe Sizes) | Outside Daimeter (O.D.) | Schedule 10 | Schedule 20 | Schedule 30 | STD Wall | Schedule 40 | Schedule 60 | EXT Hvy | Schedule 80 | Schedule 100 | Schedule 120 | Schedule 140 | Schedule 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 | …….. | …….. | …….. | …….. | …….. | …….. |
A350 Lf2 Blind Flange Tolerance Formula
ASME B16.5 | Tolerance | |
---|---|---|
A | Outside Diameter (O.D.) |
|
D | Inside Diameter |
|
B | Diameter of contact face |
|
J | Diameter of hub at base |
|
H | Diameter of hub at point of welding |
|
P | Drilling |
|
Eccentricity of bolt circle with respect to facing |
|
|
C | Thickness |
|
K | Length of hub |
|
Carbon Steel A350 LF2 Flanges Bolt Chart And Low Temperature Carbon Steel ASTM A350 Gr. Lf2 Class 2 Flange Mechanical Properties.
ASME SA 350 GR LF2 Bolt Chart
Class 150 Flanges | Class 300 Flanges | Class 600 Flanges | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
NPS | # Bolts And Studs | Diameter of Bolts And Studs | Stud Length | # Bolts And Studs | Diameter of Bolts And Studs | Stud Length | # Bolts And Studs | Diameter of Bolts And Studs | Stud Length | |||
1/16 RF | RTJ | 1/16 RF | RTJ | 1/4 RF | RTJ | |||||||
1/2 | 4 | 0.50 | 2-1/4 | – | 4 | 0.50 | 2-1/2 | 3 | 4 | 0.50 | 3 | 3 |
3/4 | 4 | 0.50 | 2-1/2 | – | 4 | 0.63 | 3 | 3-1/2 | 4 | 0.63 | 3-1/2 | 3-1/2 |
1 | 4 | 0.50 | 2-1/2 | 3 | 4 | 0.63 | 3 | 3-1/2 | 4 | 0.63 | 3-1/2 | 3-1/2 |
1-1/4 | 4 | 0.50 | 2-3/4 | 3-1/4 | 4 | 0.63 | 3-1/4 | 3-3/4 | 4 | 0.63 | 3-3/4 | 3-3/4 |
1-1/2 | 4 | 0.50 | 2-3/4 | 3-1/4 | 4 | 0.75 | 3-1/2 | 4 | 4 | 0.75 | 4-1/4 | 4-1/4 |
2 | 4 | 0.63 | 3-1/4 | 3-3/4 | 8 | 0.63 | 3-1/2 | 4 | 8 | 0.63 | 4-1/4 | 4-1/4 |
2-1/2 | 4 | 0.63 | 3-1/2 | 4 | 8 | 0.75 | 4 | 4-1/2 | 8 | 0.75 | 4-3/4 | 4-3/4 |
3 | 4 | 0.63 | 3-1/2 | 4 | 8 | 0.75 | 4-1/4 | 4-3/4 | 8 | 0.75 | 5 | 5 |
3-1/2 | 8 | 0.63 | 3-1/2 | 4 | 8 | 0.75 | 4-1/4 | 5 | 8 | 0.88 | 5-1/2 | 5-1/2 |
4 | 8 | 0.63 | 3-1/2 | 4 | 8 | 0.75 | 4-1/2 | 5 | 8 | 0.88 | 5-3/4 | 5-3/4 |
5 | 8 | 0.75 | 3-3/4 | 4-1/4 | 8 | 0.75 | 4-3/4 | 5-1/4 | 8 | 1.00 | 6-1/2 | 6-1/2 |
6 | 8 | 0.75 | 4 | 4-1/2 | 12 | 0.75 | 4-3/4 | 5-1/2 | 12 | 1.00 | 6-3/4 | 6-3/4 |
8 | 8 | 0.75 | 4-1/4 | 4-3/4 | 12 | 0.88 | 5-1/2 | 6 | 12 | 1.13 | 7-1/2 | 7-3/4 |
10 | 12 | 0.88 | 4-1/2 | 5 | 16 | 1.00 | 6-1/4 | 6-3/4 | 16 | 1.25 | 8-1/2 | 8-1/2 |
12 | 12 | 0.88 | 4-3/4 | 5-1/4 | 16 | 1.13 | 6-3/4 | 7-1/4 | 20 | 1.25 | 8-3/4 | 8-3/4 |
14 | 12 | 1.00 | 5-1/4 | 5-3/4 | 20 | 1.13 | 7 | 7-1/2 | 20 | 1.38 | 9-1/4 | 9-1/4 |
16 | 16 | 1.00 | 5-1/4 | 5-3/4 | 20 | 1.25 | 7-1/2 | 8 | 20 | 1.50 | 10 | 10 |
18 | 16 | 1.13 | 5-3/4 | 6-1/4 | 24 | 1.25 | 7-3/4 | 8-1/4 | 20 | 1.63 | 10-3/4 | 10-3/4 |
20 | 20 | 1.13 | 6-1/4 | 6-3/4 | 24 | 1.25 | 8 | 8-3/4 | 24 | 1.63 | 11-1/4 | 11-1/2 |
24 | 20 | 1.25 | 6-3/4 | 7-1/4 | 24 | 1.50 | 9 | 10 | 24 | 1.88 | 13 | 13-1/4 |
Low Temperature Carbon Steel Slip On Flange Gasket Size Chart
NPS | Gasket I.D. |
Gasket O.D. | ||||
---|---|---|---|---|---|---|
Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | ||
1/2 | 0.84 | 1.875 | 2.125 | 2.125 | 2.125 | 2.50 |
3/4 | 1.06 | 2.25 | 2.625 | 2.625 | 2.625 | 2.75 |
1 | 1.31 | 2.625 | 2.875 | 2.875 | 2.875 | 3.125 |
1 1/4 | 1.66 | 3 | 3.25 | 3.25 | 3.25 | 3.50 |
1 1/2 | 1.91 | 3.375 | 3.75 | 3.75 | 3.75 | 3.875 |
2 | 2.38 | 4.125 | 4.375 | 4.375 | 4.375 | 5.625 |
2 1/2 | 2.88 | 4.875 | 5.125 | 5.125 | 5.125 | 6.50 |
3 | 3.50 | 5.375 | 5.875 | 5.875 | 5.875 | 6.625 |
4 | 4.50 | 6.875 | 7.125 | 7.00 | 7.625 | 8.125 |
5 | 5.56 | 7.75 | 8.50 | 8.375 | 9.50 | 9.75 |
6 | 6.62 | 8.75 | 9.875 | 9.75 | 10.50 | 11.375 |
8 | 8.62 | 11 | 12.125 | 12.00 | 12.625 | 14.125 |
10 | 10.75 | 13.375 | 14.25 | 14.125 | 15.75 | 17.125 |
12 | 12.75 | 16.125 | 16.625 | 16.50 | 18.00 | 19.625 |
Buy Types Of ASTM A350 LF2 Flanges Best Price And Fast Delivery

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30 Inch, SCH 40, Class 600 LB, RF, A350 Gr Carbon Steel Tongue & Groove Flanges

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We Supplied A Comprehensive Range Of ASTM A350 LF2 Flanges To The Following Locations
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