ASTM A350 LF2 Flanges

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LTCS Flange and SA 350 Gr LF2 Blind Flange manufacturer in India

What is ASTM A350 LF2 Flanges?
The ASTM A350 LF2 Flanges are known for their moderate strength and impact toughness. The ASTM A350 specification with grade LF2 are widely used for manufacturing different types of flanges and fittings. These are primarily used in cold temperature applications, where resistance to corrosion is not an essential aspect. There are different types of ASTM A350 LF2 Flanges available; each have varied structure and applications, like:

  • Weld neck flange- These are for applications that involve severe and critical conditions.
  • Slip-on flange- They are suitable for low pressure applications.
  • Blind flange- They help to seal the ends of a piping system or pressure vessel opening.
  • Lap joint flange- They can be disassembled easily and hence are great for piping systems that need regular inspection and maintenance.
  • Socket weld flange- These are used in small and high pressure pipes.
  • Threaded flange- They are used in pipes with threaded ends.
  • Orifice flange- They are used for accessing the line that helps to meter liquids or gases.
  • Ring-type joint flange- They are mostly used for high temperature and pressure applications. They help reduce the risk of leakages.
  • Reducing flange- These help in connecting one pipe to the other.
  • Forged flange- They help in creating pipework web for valves, pipes, and similar other devices.

All the above and several other flanges are used across several industries due to the benefits offered by the ASTM A350 LF2 material. These flanges are popular due to all the features that it has including high durability, precise construction, high tensile strength, flawless finish, and superior performance. They are primarily intended to be used in very low temperature applications,

A350 Gr LF2 Weld Neck Flange Vs Sa350 LF2 Blind Flange
The A350 Gr LF2 Weld Neck Flange is mostly used in applications where the situation is severe and critical. They can withstand high-pressure and also a wide range of fluctuations in both temperature and pressure. These flanges are used in the piping connection that might carry volatile and hazardous fluids, and their temperature might be in the sub-zero range.
On the other hand, the Sa350 LF2 Blind Flange is primarily used for sealing the ends of a piping system or the nozzle of a pressure vessel opening. It is either installed in that part of the system which is not in use, or used for testing the flow of liquid or gas through the pipe. They help the engineers to get easy access to the pipe for maintenance and repair, by sealing the flow.

A350 LF2 Class 1 And Class 2 Difference
The main characteristic that differentiates A350 LF2 Class 1 And Class 2 is their minimum application temperature. For A350 LF2 Class 1, the minimum application temperature is -46 degrees C, whereas it is -18 degrees C for Class 2.

A350 LF3 Flanges Vs SA350 LF2 Flanges
The A350 LF3 and the SA 350 LF2 materials are both used in the manufacturing of forged flanges. They have a slightly different chemical composition and thus, their properties are also quite different from one another.

  • While the SA 350 material with grade LF2 can be used for services where the temperature goes down till -45.5 degrees C, the same for the grade LF3 is -101.1 degrees C.
  • They have different forging temperatures. For LF2 grade, the A350 material is forged around 1230-1260 degrees C, and they are not forged below the temperature of 900-925 degrees C. Whereas, in the case of the LF3 grade, the material is forged at around 117-1205 degrees C but not below 925 degrees C.

Heat treatment on both the grades would be done continuously, post the welding process. Also, they are machined as per the requirements. The on-going condition would help determine if the machining would be done on forged, normalized, or annealed structure.

ASTM A350 LF2 Flanges

ASTM A350 LF2 Flanges

SA350 Gr LF2 Weld Neck, Plate, and SA 350 LF2 Class 1 Puddle Flange according to ASME B16.5 specification, buy ASTM A350 LF2 Cl1 Forged Flange material at lowest price in Mumbai

Table of Content


Size Range 1/2″ to 48″
Chart of Pressure Rating 300 LBS, 2500 LBS, 1500 LBS, 900 LBS, 150 LBS, 600 LBS
JIS 40 K, 16 K, 5K, 10 K, 30 K, 20 K, 63 K
DIN Pressure Calculation 25Bar 40Bar 16Bar 6Bar 10Bar / PN64 PN10 PN25 PN16 PN6 PN40
Manufacturer of Connect / Flange Face Type LJF, RF, RTJ, FF, Small Tongue, Large Tongue & Groove
Test Magnetic particle detector, X-ray detector, Ultrasonic flaw detector, Direct-reading Spectrograph, Hydrostatic testing machine
Origin Japan / West Europe / Indian / USA / Korean
Manufacturer of GOST, JIS, ANSI, DIN, UNI, BS, AWWA, AS2129, SABS, NFE, EN etc.
UNI / EN 16Bar 6Bar 40Bar 10Bar 25Bar
Standards Provided By Manufacturer ISO70051, MSS S44, BS1560-3.1, API7S-43, B16.48, ANSI/ASME B16.5, B16.47 Series A & B, BS4504, JISB2220, ASME/ANSI B16.5/16.36/16.47A/16.47B, API605, BS 10, EN-1092, DIN, API7S-15, EN1092
Common Types By Manufacturer Threaded / Screwed / Forged / Plate
Equipment Pushing Machine, Press machine, Sand-blasting machine, Bending machine, electric bevelling machine etc
Production technique Used By Manufacturer Heat treated, Forged and machined
Coating Zinc Plated, Anti-rust Paint, Yellow Transparent, Oil Black Paint, Cold and Hot Dip Galvanized

Biggest Flange LF2 and Material A350 importer, stockists, supplier, dealers, stockholders, wholesalers, distributor, exporters and Manufacturer in Mumbai

Nominal Pipe Size Flanges Inside Diameter (ID)
(inch)
Flanges Outside Diameter (OD)
(inches)
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

Petromet supplies all LTCS Flange Material with MTC, SA 350 LF2 Slip On Flange, LF2 Steel Threaded Flange and ASTM A350 LF2 Socket Weld Flange available in Cass 150 to 2500# pressure

Yield Strength 36,000 psi
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
ASTM A350 LF2 Class 1 Flanges Price Per Piece in India Price Applicable for jan 2022 to june 2022 Price Applicable for July 2022 to December 2022
FLANGE 3/4 300 SCH 160 WNRF A350 LF2 ASME B16.5 Per Kg US $20.14 US $22.14
BLRF FLANGES TO ASTM A350 LF2, DIMN. B 16.5 -SIZE: 3/4 X 300# Per Kg US $3.58 US $5.58
WNRF FLANGES TO LTCS, DIMN. B 16.5 -SIZE: 3 X 300# S40 Per Piece US $20.73 US $22.73

We are a specialist Distributor & Stockist of SA 350 LF2 Class 1 Puddle Flange and LTCS Flange. Compare our rates with other SA 350 Gr LF2 Blind Flange Suppliers and Manufacturers in India. Buy SA 350 Gr LF2 Lap Joint Flange and ASTM A350 LF2 Class 1 Loose flange at competitive rate directly from Manufacturer

C% Mn% Si% S% P% Cr% Ni%
0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
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)
Group Of Material Common Name Of Material Type Of Material UNS Forging Spec. DIN
Low Temperature Carbon Steel (LTCS) LTCS C-Mn-Fe K03011 A350-LF2 TSTE 355 DIN 18103
Temperature Range 200° Celsius (400°F)
  • Anti-rust Paint
  • Zinc Plated
  • Yellow Transparent
  • Oil Black Paint
  • Cold and Hot Dip Galvanized
Temp. Sbasic Temp. Sbasic
-50~100 23.3 700 17.2
200 22.0 750 14.8
300 21.2 800 12.0
400 20.5 850 9.3
500 19.6 900 6.7
600 18.4 950 4.0
650 17.8 1000 2.5
Raised face and flat face SA 350 Gr LF2 Lap Joint Flange, ASTM A350 LF2 Class 1 Loose flange and SA 350 LF2 Cl1 Plate Flange manufacturer in India
Hardness 197 HB
  • Normalizing – Heat to 860 - 920°C for the time specified in the rule section, then air cool (If Required)
  • Hardening - Heat to 890 – 960oC for the time specified in the governing section, then quench in water.
  • Tempering — Re-heat to a minimum of 590oC as needed, depending on the final necessary qualities. Hold for the duration of the ruling section and cool in calm air.
Grade Test Temperature, ℉ [℃]
LF2 Class 1 -50 [-46]
LF2 Class 2 -0 [-18]
Grade & Class Eav min.
ft*lbf [J]		 Eeamin.
ft*lbf [J]
LF2 Class 1 15 [20] 12 [16]
LF2 Class 2 20 [27] 15 [20]
Check SA350 LF2 Cl1 Spectacle Blinds, ASTM A350 Gr LF2 Long Weld Neck Flange (LWNRF) and ASTM A350 LF2 Cl1 Orifice Flanges price list & pressure rating
5000 NB SA 350 LF2 Class 1 Threaded Flange

5000 NB SA 350 LF2 Class 1 Threaded Flange

LF2 Carbon Steel Long Weld Neck Flange

LF2 Carbon Steel Long Weld Neck Flange

A350 LF2 Cl1 Loose Plate Flanges

A350 LF2 Cl1 Loose Plate Flanges

A350 Gr LF2 Cl1 Lapped Joint Flange

A350 Gr LF2 Cl1 Lapped Joint Flange

Flange LF2

Flange LF2

SA 350 LF2 Plate Flanges

SA 350 LF2 Plate Flanges

LF2 Steel Screwed Flange

LF2 Steel Screwed Flange

LF2 Flanges

LF2 Flanges

ASTM A350 Weld Neck Flanges

ASTM A350 Weld Neck Flanges

150 LBS SA350 Gr LF2 Ring Joint Flange

150 LBS SA350 Gr LF2 Ring Joint Flange

LF2 Cl1 Socket Weld Flange

LF2 Cl1 Socket Weld Flange

LTCS Flanges

LTCS Flanges

SA 350 Material

SA 350 Material

15 NB A350 LF2 Puddle Flange

15 NB A350 LF2 Puddle Flange

SA 350 Gr LF2 Cl1 Raised Face Flange

SA 350 Gr LF2 Cl1 Raised Face Flange

SA 350 LF2 Cl1 Orifice Flanges

SA 350 LF2 Cl1 Orifice Flanges

A350 LF2 Class 1 Reducing Flanges

A350 LF2 Class 1 Reducing Flanges

ASTM A350 LF2 Cl1 Forged Flange

ASTM A350 LF2 Cl1 Forged Flange

1500 LBS Sa350 LF2 Cl1 BLRF Flanges

1500 LBS Sa350 LF2 Cl1 BLRF Flanges

A350 Gr LF2 Material

A350 Gr LF2 Material

A350 LF2 Cl1 Material

A350 LF2 Cl1 Material

SA 350 Gr LF2 Blind Flange

SA 350 Gr LF2 Blind Flange

ASTM A350 LF2 Class 1 Slip On Flange

ASTM A350 LF2 Class 1 Slip On Flange

A350 Gr LF2 Girth Flanges

A350 Gr LF2 Girth Flanges

A350 LF3 Nipoflange

A350 LF3 Nipoflange

SA350 Gr LF2 CL1 Spectacle Blind Flange

SA350 Gr LF2 CL1 Spectacle Blind Flange

A350 Flange

A350 Flange

A 350 Gr LF2 Expander Flanges

A 350 Gr LF2 Expander Flanges

Astm LF2 Flange

Astm LF2 Flange

ASTM A350 Gr LF2 SORF Flanges

ASTM A350 Gr LF2 SORF Flanges

ASTM A350 LF2 Material

ASTM A350 LF2 Material

600 LBS ASME SA 350 LF2 Class 1 Tongue & Groove Flange

600 LBS ASME SA 350 LF2 Class 1 Tongue & Groove Flange

900 LBS ASTM A350 LF2 Welding neck flange

900 LBS ASTM A350 LF2 Welding neck flange

300 LBS A350 LF2 Steel WNRF Flange

300 LBS A350 LF2 Steel WNRF Flange

LF2 Material

LF2 Material

2500 LBS LF2 Class 1 SWRF Flanges

2500 LBS LF2 Class 1 SWRF Flanges

Forgings fabricated in accordance with ASTM A350/ ASME SA350 must undergo a hydrostatic test suitable with the finished item's rating. Only when Supplementary Requirement S57 of Specification A961/A961M is stated, shall such testing be performed by the manufacturer.

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
  • Flaring Test
  • Dye Penetrant Test (DP Test)
  • Flattening Test
  • Radiography Test
  • Macro Test
  • Eddy Current Testing
  • Hardness Test
  • Ultra Sonic Test (UT)
  • Pitting Resistance Test
  • Micro Test
  • Intergranular Corrosion (IGC) Test
  • Petrochemicals
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Sea Water Equipment
  • Power Generation
  • Pulp and Paper Industry
  • Off-Shore Oil Drilling Companies

For this material, the forging temperature should be between 900 and 1200oC. To avoid excessive scaling, soak times should be maintained to a minimum, but enough time should be allowed for the centre to reach furnace temperature. Pieces should be allowed to cool in steady air after forging.

ASTM A350 LF2 offers good to very good machinability, depending on condition, and operations like sawing, turning, broaching, milling, and so on can be completed satisfactorily using normal machine tool manufacturer recommended speeds and feeds.

LTCS Flanges is wrapped in plastic cloth and packed in a wooden box, a wooden pallet, and a fumigated wooden carrate. Our packaging is fully waterproof and transportable, with proper strips on a wooden box with a lifting point.

  • Pay Mode Terms: T/T (Bank Transfer), L/C (Letter of Credit), Other
  • Port of Dispatch: Mumbai, India
  • Packaging Details: Low Temperature Carbon Steel Flanges are packaged with care and safety to ensure that they reach our client in the condition that he expects. Extra charges apply for packaging.
  • Tax: 18% GST

ASTM A350 LF2 Blind Flange Dimensions

Size in Inch Size in mm ISO Stud Size RF Height Outer Dia. RF Dia. Hole Size PCD No of Bolts Bolt Size UNC Flange Thickness RF Stud Length Weight in kg
D A C E B
1/2 15 M20 7 135 34.9 7/8 88.9 4 3/4 30.2 120 3.2
3/4 20 M20 7 140 42.9 7/8 95.2 4 3/4 31.8 125 3.7
1 25 M24 7 160 50.8 1 108 4 7/8 35 140 5
1 1/4 32 M27 7 185 63.5 1 1/8 130.2 4 1 38.1 150 7.8
1 1/2 40 M30 7 205 73 1 1/4 146 4 1 1/8 44.5 170 10.5
2 50 M27 7 235 92.1 1 1/8 171.4 8 1 50.9 180 18
2 1/2 65 M30 7 265 104.8 1 1/4 196.8 8 1 1/8 57.2 195 25.5
3 80 M33 7 305 127 1 3/8 228.6 8 1 1/4 66.7 220 39
4 100 M39 7 355 157.2 1 5/8 273 8 1 1/2 76.2 255 61.5
5 125 M45 7 420 185.7 1 7/8 323.8 8 1 3/4 92.1 300 102
6 150 M52 7 485 215.9 2 1/8 368.3 8 2 108 345 157
8 200 M52 7 550 269.9 2 1/8 438.2 12 2 127 380 241
10 250 M64 7 675 323.8 2 5/8 539.8 12 2 1/2 165.1 490 470
12 300 M72 7 760 381 2 7/8 619.1 12 2 3/4 184.2 540 575

ASTM A350 LF2 Weld Neck Flange Dimensions

Flange NPS H Inside
Diameter		 Flat Face
Thickness (T2)		 Outside
Diameter		 Raised Face
(RF)		 Raised Face
(R)		 H1 Raised Face
Thickness (T)		 T1 Bolt Circle
(BC)		 Bolt Hole
(B)		 No. of
Bolt Holes
1/2" 1.19" 0.62" 1.82" 3.50" .063" 1.38" 0.84" 1.88" .38" 2.38" .62" 4
1-1/4" 2.31" 1.38" 2.19" 4.62" .063" 2.50" 1.66" 2.25" .56" 3.50" .62" 4
3/4" 1.50" 0.82" 2.00" 3.88" .063" 1.69" 1.05" 2.06" .44" 2.75" .62" 4
1-1/2" 2.56" 1.61" 2.38" 5.00" .063" 2.88" 1.90" 2.44" .62" 3.88" .62" 4
1" 1.94" 1.05" 2.13" 4.25" .063" 2.00" 1.32" 2.19" .50" 3.12" .62" 4
2" 3.06" 2.07" 2.44" 6.00" .063" 3.62" 2.38" 2.50" .69" 4.75" .75" 4
2-1/2" 3.56" 2.47" 2.69" 7.00" .063" 4.12" 2.88" 2.75" .82" 5.50" .75" 4
3" 4.25" 3.07" 2.69" 7.50" .063" 5.00" 3.50" 2.75" .88" 6.00" .75" 4
4" 5.31" 4.03" 2.94" 9.00" .063" 6.19" 4.50" 3.00" .88" 7.50" .75" 8
5" 6.44" 5.05" 3.44" 10.00" .063" 7.31" 5.56" 3.50" .88" 8.50" .88" 8
3-1/2" 4.81" 3.55" 2.75" 8.50" .063" 5.50" 4.00" 2.81" .88" 7.00" .75" 8
6" 7.56" 6.07" 3.44" 11.00" .063" 8.50" 6.63" 3.50" .94" 9.50" .88" 8
8" 9.69" 7.98" 3.94" 13.50" .063" 10.62" 8.63" 4.00" 1.06" 11.75" .88" 8
22" 24.25" 21.25" 5.82" 29.50" .063" 25.25" 22.00" 5.88" 1.75" 27.25" 1.38" 20
10" 12.00" 10.02" 3.94" 16.00" .063" 12.75" 10.75" 4.00" 1.13" 14.25" 1.00" 12
12" 14.38" 12.00" 4.44" 19.00" .063" 15.00" 12.75" 4.50" 1.19" 17.00" 1.00" 12
16" 18.00" 15.25" 4.94" 23.50" .063" 18.50" 16.00" 5.00" 1.38" 21.25" 1.12" 16
18" 19.88" 17.25" 5.44" 25.00" .063" 21.00" 18.00" 5.50" 1.50" 22.75" 1.25" 16
14" 15.75" 13.25" 4.94" 21.00" .063" 16.25" 14.00" 5.00" 1.32" 18.75" 1.12" 12
20" 22.00" 19.25" 5.63" 27.50" .063" 23.00" 20.00" 5.69" 1.63" 25.00" 1.25" 20
24" 26.12" 23.25" 5.94" 32.00" .063" 27.25" 24.00" 6.00" 1.82" 29.50" 1.38" 20

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