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ASTM A350 LF2 Flanges

check ASME SA 350 GR LF2 Weld Neck Flange Dimensions, Carbon Steel A350 LF2 Flanges

ASTM A350 LF2 Flanges come in welding or screw types. The flanges are screwed or welded together with pipes to make the connection between pipes. Navstar Steel is a leading manufacturer and supplier of the various ASME SA 350 GR LF2 Weld Neck Flange Dimensions and types. The material composition includes carbon, silicon, manganese, phosphorus, sulfur, molybdenum, copper, chromium, nickel, vanadium and niobium. 

Manufacturer of A350 LF2 Class 1 Flange, A350 LF2 Blind Flange, Carbon Steel A350 LF2 Slip On Flanges Price List

The carbon steel gets its mechanical properties and physical properties from this material composition. The Carbon Steel A350 LF2 Flanges have a minimum tensile strength of 485MPa and a minimum yield strength of 250MPa. The material is also hard with a 197 HB Brinell hardness score. There are class 1 and class 2 product level specifications in these flanges.


The A350 LF2 Class 1 Flange is the most used with class 2 being used in specific applications. The flanges can also be heat treated for hardening. The heat treatment methods are normalizing and tempering. The A350 LF2 Blind Flange is a type of flange that is fitted on to the ends of pipes to close a pipe line completely. These could be bolted for easy removal at maintenance or be welded permanently. The Carbon Steel A350 LF2 Slip On Flanges are used with seamless pipes for easy installment on to the correct location as the flanges allow the pipes to slip on to the flange and move to the right position before welding or bolting. The Astm A350 Grade LF2 Class 2 Pipe Flange is also used in similar capacities. Please contact us for further information and pricing of the products.

Specification List of ASME SA 350 GR LF2 Weld Neck Flange

Size 1/2" TO 4"
Range 15 NB TO 100 NB IN 3000 LBS, 6000 LBS, 9000 LBS
Grade ASTM / ASME A105/ A105N/ A694 F42/46/52/56/60/65/70 / A350 LF3/ A350 LF2
Pressure Rating 2000#, 3000#, 6000#, 9000#
Class 150#, 300#, 400#, 600#, 900#, 1500# & 2500#.
Type Socketweld Fittings, Screwed-Threaded Fittings
Form Tee, Union, Full Coupling, Half Coupling,Elbow 45 Deg & 90 Deg, Swage Nipple, Cross, Cap, Plug Bush

Huge Stock of Sa350 Gr Lf2 Forged Flange, A350 Lf2 Killed Carbon Steel Flanges, view A350 Lf2 Carbon Steel Flanges Weight Chart

Weight Of Carbon Steel A350 LF2 Flanges

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
ASTM B16.5 ASTM 150 89 60 4 13 16
ASTM 300 95 67 4 13 16
ASTM 600 95 67 4 13 16
ASTM 900 121 83 4 19 22
ASTM 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

Most Selling Types Of A350 LF2 Class 1 Flange

astm a182 a350 lf2 carbon steel van stone flanges

astm a182 a350 lf2 carbon steel van stone flanges

ASME / ASTM A350 LF2 Pipe Flanges

ASME / ASTM A350 LF2 Pipe Flanges

ASTM A350 LF2 CL1 blind flanges

ASTM A350 LF2 CL1 blind flanges

Astm A350 lf2 Class150 Blind Flange

Astm A350 lf2 Class150 Blind Flanges

SW RF Flange 150# ASTM A350 LF2 Cl 1 ASME B16.5

SW RF Flanges 150# ASTM A350 LF2 Cl 1 ASME B16.5

ASTM A350 Grade LF2 Class 1 WN Flange ASME B16.5

ASTM A350 Grade LF2 Class 1 WN Flanges ASME B16.5

ASTM a350 gr lf2 carbon steel forged flanges

ASTM a350 gr lf2 carbon steel forged flanges

forged ASTM A350 GR. LF2 flange

forged ASTM A350 GR. LF2 flanges

awwa c207 flange astm sa350 lf2 flange

awwa c207 flange astm sa350 lf2 flanges

blind flange astm a350 lf2 cl1/cl2 flange

blind flange astm a350 lf2 cl1/cl2 flanges

class 300 RF A350 LF2 steel flanges

class 300 RF A350 LF2 steel flanges

ASTM A350 LF2 CL1 forging carbon steel Flanges

ASTM A350 LF2 CL1 forging carbon steel Flanges

A350 LF2 Blind Flange Thermal Properties

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
Check 18 inch 1500# A350 Lf2 Plate Flanges, Customized high quality Astm A350 Lf2 Class 1 And Class 2 Flange, ASME SA 350 Gr Lf2 Cl1 Flanges properties

Carbon Steel A350 LF2 Slip On Flanges Chemical Composition

Grade C% Mn% Si% S% P% Cr% Ni%
LF1 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
Lf2 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
LF3 0.20 max 0.90 .20/.35 .040 max .035 max 0.30 max 3.3/3.7

ASTM A350 Grade LF2 Class 2 Pipe Flange Mechanical Table

PROPERTIES Imperial
TS Min psi (Mpa) 70,000 (485)
YS Min psi (Mpa) 36,000 (250)
EL (2″ Min) 22%
RA Min 30%
Hardness, Bhn Max 197
-50ºF Charpy Min Impact
Energy F t/Lb (J):-
Set of 3 Specimen* 15 (20)
For One Specimen 12 (16)

Sa350 Gr Lf2 Forged Flange Pressure Chart

TEMP °C 150 300 400 600 900 1500 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
TEMP °C 150 300 400 600 900 1500 2500

A350 Lf2 Killed Carbon Steel Flanges Dimension

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)
  • ASME B1.20.1, Pipe Threads, General Purpose
  • ASME B16.1, Cast Iron Flanges and Flanged Fittings Classes 25, 125 and 250
  • ASME B16.5, Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24
  • ASME B16.11, Forged Fittings, Socket Welding and Threaded
  • ASME B16.25, Buttwelding Ends
  • ASME B16.36, Orifice Flanges
  • ASME B16.47, Large Diameter Steel Flanges NPS 26 Through NPS 60
  • ASME B31.1, Power Piping
  • ASME B31.3, Process Piping
  • ASME B46.1, Surface Texture (Surface Roughness, Waviness, and Lay)

ASTM A350 LF2 Carbon Steel Socket Weld Forged Fittings

Nom. Pipe Size Min. Socket Dia. Nom. Bore Dia. A B C D E F G H J K L M N O P
PRESSURE CLASS 3000
1/8 0.42 0.269 0.8 0.9 0.7 0.9 0.4 0.3 1.1 0.8 0.4 0.7
1/4 0.555 0.364 0.8 0.9 0.7 0.9 0.4 0.3 1.1 0.9 1.62 0.7 1.25 0.3 0.4 0.9 0.8
3/8 0.69 0.493 0.9 1.1 0.7 1.1 0.5 0.3 1.1 1.1 1.88 0.8 1.44 0.4 0.4 1.3 0.8
1/2 0.855 0.622 1.1 1.3 0.8 1.3 0.6 0.4 1.3 1.3 2.06 0.8 1.62 0.4 0.4 1.3 0.8
3/4 1.065 0.824 1.3 1.5 1 1.5 0.8 0.5 1.5 1.5 2.53 1 2 0.4 0.6 1.5 1
1 1.33 1.049 1.4 1.8 1.1 1.8 0.9 0.6 1.6 1.9 2.94 1.1 2.38 0.5 0.6 1.8 1
1 1/4 1.675 1.38 1.7 2.3 1.2 2.3 1.1 0.7 1.6 2.3 3.44 1.3 2.81 0.6 0.6 2.3 1.1
1 1/2 1.915 1.61 1.9 2.5 1.3 2.5 1.3 0.8 1.6 2.5 3.88 1.4 3.19 0.7 0.6 2.5 1.1
2 2.406 2.067 2.3 3.1 1.7 3.1 1.5 1 2.1 3 4.69 1.6 3.88 0.8 0.7 3.1 1.3
2 1/2 2.906 2.469 2.9 3.6 2 4 1.6 1.1 2.1 3.6 6.88 2.1 5.94 1.2 0.7 3.6 1.3
3 3.535 3.068 3.3 4.3 2.4 4.6 2.3 1.3 2.1 4.4 8.5 2.5 7.25 1.3 0.7 5.1 1.4
4 4.545 4.026 4.2 5.8 3.1 5.8 2.6 1.6 2.4 5.5 13.6 4 12.1 2.5 0.8 6.8 1.6
PRESSURE CLASS 6000
3/8 0.69 0.344 1.1 1.3 0.9 1.3 0.6 0.4 1.1 1.3 2.12 0.9 1.5 0.3 0.4 1.3 0.9
1/2 0.855 0.464 1.3 1.5 1 1.5 0.8 0.5 1.3 1.5 2.56 1 2 0.4 0.4 1.5 0.9
3/4 1.065 0.612 1.5 1.8 1.1 1.8 0.9 0.6 1.5 1.8 3 1.1 2.38 0.5 0.6 1.8 1.1
1 1.33 0.815 1.7 2.3 1.3 2.3 1.1 0.7 1.6 2.3 3.5 1.3 2.81 0.6 0.6 2.3 1.2
1 1/4 1.675 1.16 2 2.5 1.3 2.5 1.3 0.8 1.6 2.5 3.94 1.4 3.19 0.7 0.6 2.5 1.2
1 1/2 1.915 1.338 2.3 3.1 1.7 3.1 1.5 1 1.6 3 4.75 1.7 3.88 0.8 0.6 3.1 1.3
2 2.406 1.687 2.5 3.4 1.8 3.4 1.6 1.1 2.1 3.6 6.88 2.1 6 1.3 0.7 3.6 1.4
2 1/2 2.906 2.125 3.2 4 2 4 2.3 1.3 2.1 4.3 8.5 2.5 7.5 1.5 0.7 5.1 1.4
3 3.535 2.624 3.7 4.8 2.4 4.6 2.5 1.4 2.1 5 8.5 2.5 7.25 1.3 0.7 5.1 1.6
4 4.545 3.438 4.5 6 3.1 5.8 2.6 1.6 2.4 6.3 13.6 4 12.1 2.5 0.8 6.8 1.8
Accept all Large Orders of A350 Lf2 Reducing Flanges, A350 Lf2 Plate Flanges View price of ASTM A350 Grade LF2 Class 2 Pipe Flange

Price List of A350 Lf2 Carbon Steel Flanges

ASTM A350 LF2 Flanges Price Per Piece in India ASME SA350 LF2 Flanges Price in INR
ASTM A350 LF2 CL1/CL2 Flanges $200.00/ Piece
ASTM a350 lf2 steel flanges $1.00-$500.00/ Piece
150# RF SCH 80 ASME B16.5 ASTM A350 LF2 CL 1 LTCS WN Flanges $5.00-$2,000.00/ Piece
a350 LF2 wn rtj/orifice flanges $1,200.00/ Piece