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What are the key specifications of ASTM A350 LF2 flanges for buyers?

The ASTM A350 LF2 specification is for low temperature applications including cryogenic and refrigeration systems. The ASTM A350 LF2 flanges manufacturers in India consider the given specification to suffice their application requirements:

  • The type and facing of the flange
  • Size and pressure rating
  • Standard and material grade
  • Heat treatment and surface finish
  • Testing, inspection and documentation

SA 350 Gr LF2 CL1 Weld Neck/ Blind Flange and LTCS Flange Material manufacturer in India


ASTM A350 LF2 Flanges

Manufacturer of A350 LF2 Cl1 Material in all types such as SA350 Gr LF2 CL1 Puddle/ Plate Flange cutted from sheet and ANSI/ ASME B16.5 SA 350 LF2 Class 1 Forged Flange from Round bar/ blanks


Can you explain the difference between Class 1 and Class 2 in LF2 flanges?

The difference between Class 1 and Class 2 in LF2 flanges is in their notch toughness which is required for specific low temperature applications.

  • Class 1 has lower notch toughness requirements than class 2 SA 350 lf2 material.
  • CL 1 requires Charpy-V notch impact testing at a min of -46 °C, whereas for class 2, it is -101 °C.
  • Class 2 ASME SA350 gr lf2 plate flange is used for lower temperature applications compared to class 1.

SA350 LF2 Blind Flanges

SA350 LF2 Blind Flanges

  • Manufacturing Process :
  • Castings
  • Forgings
  • Plates
ASTM A350 Gr Lf2 Class 1 Slip On Flanges

ASTM A350 Gr Lf2 Class 1 Slip On Flanges

  • Wall Thickness:
  • SCH 10/ 20/ 40
  • SCH 60/ 80/ 100
  • SCH 120/ 140 / 180
A350 Grade LF2 Weld Neck Flanges

A350 Grade LF2 Weld Neck Flanges

  • Pressure Class
  • Class 150 To 300
  • 600LBS To 900LBS
  • 1500# To 2500#
Carbon Steel A350 LF2 Threaded Flanges

Carbon Steel A350 LF2 Threaded Flanges

  • Face Type :
  • Ring type joint
  • Flat face
  • Raised face
LTCS Raised Face Flanges

LTCS Raised Face Flanges

  • Dimensions
  • ASME B16.5
  • ASME B16.47
  • ANSI B16.5
LTCS Ring Type Joint (RTJ) Flanges

LTCS Ring Type Joint (RTJ) Flanges

  • Test Certificates :
  • EN 10204/3.1B
  • Raw materials certificate
  • Third party inspection report
CS A350 LF2 Spectacle Blind Flange

CS A350 LF2 Spectacle Blind Flange

  • DIN Standard :
  • PN6/ PN10
  • PN16/ PN25
  • PN40/ PN64
 Grade Lf2 CL 1 Orifice Flanges

Grade Lf2 CL 1 Orifice Flanges

  • Supporting Material :
  • Gasket
  • Ring joint
  • Flange bolts
LTCS A350 LF2 Puddle Flange

LTCS A350 LF2 Puddle Flange

  • Facing Finish :
  • Stock finish
  • Spiral serrated
  • Smooth finish
ASTM A350 LF2 Flanges


ASTM A350 LF2 Material Specification

ASTM A350 LF2 Material Specification

What is the impact of coating on the price of low temperature carbon steel flanges?

The impact of coating on the price of low temperature carbon steel flanges would depend on the type of coating and its thickness. The cost also varies with the coating quality, the number of flanges to be coated, application method and customization requirements. You can contact a renowned SA 350 lf2 class 1 forged flange manufacturer like Vishal Steel who offers high quality flanges and coatings on them at the most competitive rates.


A350 Lf2 Flanges Price

Type Of Flange Size In Inch SCH Class Grade Price In INR (India) Per Piece
Weld Neck Flange 2 STD 150 ASTM A350 Lf2 Class 1 354.00
- 4 STD 300 - 763.00
- 6 80 300 - 1125.00
- 8 80 300 - 1456.00
Weld Neck 10 80 300 ASTM A350 Lf2 Class 1 2146.00
Slip On Flange 2 40 150 ASTM A350 Lf2 Class 2 234.00
- 3 40 150 - 478.00
- 4 80 300 - 689.00
- 6 80 300 - 1136.00
Slip On 8 80 300 - 1499.00
Blind Flange 3/4 40 150 ASTM A350 Lf2 Class 2 167.00
- 1 40 150 - 212.00
- 1-1/2 40 150 - 347.00
- 2 40 150 - 548.00
- 4 40 150 - 983.00
- 6 40 150 - 1324.00
Blind 8 40 150 - 1774.00

A350 LF2 Yield Strength

ASTM A350 LF2 Flanges Yield Strength
ksi 36
MPa 250

What is the purpose of pressure rating in an LTCS flange?

  • The purpose of pressure rating in the LTCS flange is to ensure the safety and integrity of the system. Using a flange that cannot bear the pressure of a given service can lead to failure and accident.
  • They are established in accordance with the industry standards and codes.
  • The pressure rating of LTCS flange material also takes into account the temperature effect on the mechanical properties of the material.

Types Of ASTM A350 LF2 Flanges

A350 LF2 CL1 Socket Weld Flanges

A350 LF2 CL1 Socket Weld Flanges

  • Attached Process :
  • Welding
  • Brazing
  • Threading
 SA350 LF2 CL1 Plate Flanges

SA350 LF2 CL1 Plate Flanges

  • EN Standard :
  • 6Bar/ 10Bar
  • 16Bar/ 25Bar
  • 40Bar
A350 LF2 Carbon Steel Lap Joint Flanges

A350 LF2 Carbon Steel Lap Joint Flanges

  • Facing Finish :
  • Stock finish
  • Spiral serrated
  • Smooth finish
LTCS Reducing Flange

LTCS Reducing Flange

  • Suitable Gasket :
  • SOFT gaskets
  • Hard gaskets
  • Composite gaskets
 A350 LF2 Cl1 Vanstone Flange

A350 LF2 Cl1 Vanstone Flange

  • Heat treatment :
  • Normalizing & quenching
  • Solution Annealing
A350 LF2 Cl1 RTJ Flange

A350 LF2 Cl1 RTJ Flange

  • JIS Standard :
  • 5K/ 10K/ 16K
  • 20K/ 30K
  • 40K/ 63K
LF2 Carbon Steel Square Flanges

LF2 Carbon Steel Square Flanges

  • Testing methods :
  • Hardness test
  • Magnetic particle test
  • Liquid penetrant test
 A350 Gr LF2 Cl1 Flat Flanges

A350 Gr LF2 Cl1 Flat Flanges

  • Documentation :
  • Raw material reports
  • Guarantee letter
  • Heat treatment chart
SA350 Gr LF2 CL1 Anchor Flange

SA350 Gr LF2 CL1 Anchor Flange

  • Application :
  • Pharmaceuticals
  • Petrochemicals
  • Power generation

Low Temperature Carbon Steel Flange Rating

Temperature °F Working Pressures by Class In (PSI)
Class 150 Class 300
-20~100 285 740
200 260 680
300 230 655
400 200 635
500 170 605
600 140 570
650 125 550
700 110 530
750 95 505
800 80 410
850 65 320
900 50 230
950 35 135
1000 20 85

Temperature °F Working Pressures by Class In (PSI)
Class 600 Class 1500 Class 2500
-20~100 1480 3705 6170
200 1360 3395 5655
300 1310 3270 5450
400 1265 3170 5280
500 1205 3015 5025
600 1135 2840 4730
650 1100 2745 4575
700 1060 2655 4425
750 1015 2535 4230
800 825 2055 3430
850 640 1595 2655
900 460 1150 1915
950 275 685 1145
1000 170 430 715

A350 Lf2 Flanges Testing Equipment

A350 Lf2 Flanges Testing Equipment
A350 Lf2 Flanges Testing Equipment
A350 Lf2 Flanges Testing Equipment

SA 350 Gr LF2 Cl 1 Chemical Composition

Element Of ASTM A350 LF2 Flanges ASTM A350 LF2 Composition
Ni ≤0.40
Cr ≤0.30
Mo ≤0.12
Mn 0.60-1.35
P ≤0.035
Cu ≤0.40
S ≤0.040
Si 0.15-0.30
C ≤0.30
Cb ≤0.02
V ≤0.08
N ...

ASTM A350 LF2 Mechanical Properties

Grade Of ASTM A350 LF2 Flanges Tensile Strength Yield Strength, (minimum) Elongation, (minimum) Hardness, (maximum)
ksi MPa ksi MPa % HBW
LF2 Class 2 Flanges 70–95 485–655 36 250 22 197
LF2 Class 1 Flanges 70–95 485–655 36 250 22 197

SA 350 LF2 Class 1 Equivalent


Class Eav min.
ft*lbf [J]
Eea min.
ft*lbf [J]
LF2 Class 1 15 [20] 12 [16]

A350 LF2 Temperature Range

Working pressure by Class And BAR

TEMP(°C) 150 300 600
-29 TO 38 19.6 51.1 102.1
50 19.2 50.1 100.2
100 17.7 46.6 93.2
150 15.8 45.1 90.2
200 13.8 43.8 87.6
250 12.1 41.9 83.9
300 10.2 39.8 79.6
325 9.3 38.7 77.4
350 8.4 37.6 75.1
375 7.4 36.4 72.7
400 6.5 34.7 69.4
425 5.5 28.8 57.5
450 4.6 23 46
475 3.7 17.4 34.9
500 2.8 11.8 23.5
538 1.4 5.9 11.8

Exporter of ASTM A350 LF2 Slip On Flange, SA 350 LF2 Socket Weld Flange and LF2 Steel Threaded Flange with UT, MT or PT Non-destructive testing or as required


LTCS Flange Coating


LTCS Flange Coating
  • Cold And Hot Dip Galvanized Coating
  • Epoxy Coating
  • FBE Coating
  • Scotch Coating
  • Oil Black Paint Coating
  • Zinc Plated Coating
  • Yellow Transparent Coating
  • Anti-rust Paint Coating

ASTM A350 LF2 Welding Neck Flange Dimensions

ASTM A350 LF2 Welding Neck Flange Dimensions

Dimensions of Class 150 To 2500

CLassCLass 150CLass 300CLass 600CLass 900CLass 1500CLass 2500
Diameter
A
303838383843
Diameter
D
909595120120135
Thickness
B
9.612.714.322.322.330.2
11.214.320.728.728.736.6
Diameter
G
35.135.135.135.135.135.1
Diameter
K
60.366.766.782.682.688.9
Hight465152606073
47.652.658.466.466.479.4
Number
L
444444
Diameter
L
15.915.915.922.222.222.2
Stud Bolts Diameter x Length
Diameter
(in)
1/21/21/23/43/43/4
Length
mm
556575110110120

ASTM A350 Lf2 Hardness

LF2 Flanges Hardness, (maximum)
HBW 197

ASTM A350 Lf2 Blind Flange Dimensions

ASTM A350 Lf2 Blind Flange Dimensions

Dimensions of Class 150 To 2500

CLassCLass 150CLass 300CLass 600CLass 900CLass 1500CLass 2500
Diameter
D
909595120120135
B9.612.714.322.322.330.2
11.214.320.728.728.736.6
Diameter
G
35.135.135.135.135.135.1
Diameter
K
60.366.766.782.682.688.9
Number
L
444444
Diameter
L
15.915.915.922.222.222.2
Stud Bolts Diameter x Length
Diameter
(in)
1/21/21/23/43/43/4
Length
mm
556575110110120

Manufacturer of ASTM A350 LF2 Class 1 Lap Joint Flange, SA 350 Gr LF2 Plate Flange and SA 350 LF2 Cl1 Loose plate flange material with sealing face in Class 150/ 300/ 600/ 900, EN 1092-2 PN10, EN 1092-1 Type 11 PN25, JIS 10K, AWWA C207 Class D and BS10 Table D standard

ASTM A350 Lf2 Flanges Weight

Normal Size Of Steel Pipe Dimensions In MM LF2 Carbon Steel Flanges Weight In Kilogram
Size In Millimeter
Outer Daimeter (O.D.) In
(MM)

Wall Thickness Of
(D)
In M)
(A350 Lf2 Slip On Flanges)
And Socket Weld Flanges)
(ASME SA350 Lf2 Weld Neck Flanges) (A350 Lf2 Blind Flanges)
15 88.9 11.2 0.4 0.5 0.4
20 98.6 12.7 0.6 0.7 0.6
25 108 14.2 0.8 1 0.9
32 117.3 15.7 1 1.3 1.2
40 127 17.5 1.3 1.7 1.5
50 152.4 19.1 2.1 2.6 2.4
65 177.8 22.4 3.3 4.1 3.9
80 190.5 23.9 3.9 4.9 4.9
90 215.9 23.9 4.8 6.1 6.2
100 228.6 23.9 5.3 6.8 7.0
125 254 23.9 6.1 8.6 8.6
150 279.4 25.4 7.5 10.6 11.3
200 342.9 28.4 12.1 17.6 19.6
250 406.4 30.2 16.5 24 28.6
300 482.6 31.8 26.2 36.5 43.2
350 533.4 35.1 34.6 48.4 58.1
400 596.9 36.6 44.8 60.6 76.1
450 635 39.6 48.9 68.3 93.7
500 698.5 42.9 61.9 84.5 122.0

ASTM A350 Lf2 Slip On Flange Dimensions

ASTM A350 Lf2 Slip On Flange Dimensions

Dimensions of Class 150, 300, 600, 900, 1500, 2500

CLass15030060090015002500
Diameter
A
3038383838...
Diameter
D
909595120120...
THK
B
9.612.714.322.322.3...
11.214.320.728.728.7...
Diameter
G
35.135.135.135.135.1...
Diameter
K
60.366.766.782.682.6...
Height1421223232...
15.622.628.438.438.4...
Number
L
44444...
Diameter
L
15.915.915.922.222.2...
Stud Bolts Diameter x Length
Diameter
(in)
1/21/21/23/43/4...
Length
mm
556575110110...

Manufacturer of DN 250 FF/ Raised ASTM A350 LF2 Cl1 Long Weld Neck Flange (LWNRF), SA350 LF2 Cl1 Spectacle Blinds and ASTM A350 Gr LF2 Orifice Flanges in Mumbai

A350 Flange Material Tensile Strength

A350 LF2 Class 1 Flanges Tensile Strength (minimum)
ksi 70–95
MPa 485–655

Vishal Steel Is Biggest Forging Factory In India

Vishal Steel Is Biggest Forging Factory In India
Vishal Steel Is Biggest Forging Factory In India
Vishal Steel Is Biggest Forging Factory In India

Gasket For A350 LF2 CL2 Flanges

(Normal Size Of Steel Pipes) In Inch (I.D.) Inner Daimeter Gasket
(O.D.) Outer Daimeter Gasket
Class 150 Class 300
1/2 0.84 1.875 2.125
3/4 1.06 2.25 2.625
1 1.31 2.625 2.875
1 1/4 1.66 3 3.25
1 1/2 1.91 3.375 3.75
2 2.38 4.125 4.375
2 1/2 2.88 4.875 5.125
3 3.50 5.375 5.875
4 4.50 6.875 7.125
5 5.56 7.75 8.50
6 6.62 8.75 9.875
8 8.62 11 12.125
10 10.75 13.375 14.25
12 12.75 16.125 16.625

SA 350 LF2 Flanges Bolts Chart as per Class 300

Size in Inches Bolts Number Length Of RF Stud Length Of Machine Bolt
1/2 4 65 55
3/4 4 75 65
1 4 75 65
1 1/4 4 85 70
1 1/2 4 90 75
2 8 90 75
2 1/2 8 100 85
3 8 110 90
3 1/2 8 110 95
4 8 115 95
5 8 120 110
6 12 120 110
8 12 140 120
10 16 160 140
12 16 170 145
14 20 180 160
16 20 190 165
18 24 195 170
20 24 205 185
24 24 230 205

Marking On ASTM A350 LF2 Flanges

Marking On ASTM A350 LF2 Flanges
  • size
  • item
  • specification and number
  • pressure rating, with unit
  • OD
  • WT, with unit
  • bore when applicable
  • std schedule when applicable,
  • material specification
  • 4"
  • FLANGE
  • WNRF
  • ASME B16.5 300#
  • 6" OD x 0.250"
  • 152.4 Unit
  • Bore 15.500"
  • SCH 120
  • ASTM A350 LF2 Class 2

Forging Process Of SA350 LF2 Class 1 Pipe Flange

  • Matrial Preparing
  • Matrial Cutting
  • Heating
  • Foring
  • Heat Treatment
  • Cutting & Shearing
  • Inspection

A350 Flange Material Melting Point

ASTM A350 LF2 Flanges Melting Point
(Deg F) 2740

Difference between the tensile and yield strength of the SA 350 Gr LF2 CL1 Weld Neck flange?

Tensile strength is the maximum stress that SA 350 Gr LF2 CL1 Weld Neck flange can withstand when it is stretched, without breaking. The tensile strength can vary within the range of 485-655 MPa.

Yield strength is the amount of stress under which the weld neck flange can undergo permanent deformation. The yield strength of LF2 CL1 material is around 250 MPa.


How do I check the mill test certificate of the A350 lf2 class 2 Blind Flange?

To check the mill test certificate of A350 lf2 class 2 blind flange, you need to confirm its material grade, chemical composition, mechanical properties, heat treatment applied and traceability information.


ASTM A350 LF2 Carbon Steel Flanges Inspection

ASTM A350 LF2 Carbon Steel Flanges Inspection
ASTM A350 LF2 Carbon Steel Flanges Inspection

List Of Forging Machinery

List Of Forging Machinery
List Of Forging Machinery

  • Beveling Machine
  • CNC Lath
  • Oil Fired Heat Treatment Furnace
  • Hydraulic Press 300 Tons Capacity
  • Radial Driling Machine
  • Elbow Beveling Machine
  • Conventional Machine
  • Hot Forming Machines
  • Cold Forming Machines
  • Heat Treatment For Forged Fittings
  • Hydraulic Press 150 Tons Capacity
  • Portable Temperature Indicator

Packaging Of ASTM A350 LF2 Flanges

Packaging Of ASTM A350 LF2 Flanges
Packaging Of ASTM A350 LF2 Flanges
Packaging Of ASTM A350 LF2 Flanges