Table of Contents
The ASTM A350 Grade LF1 Flange is a material specification for carbon and low alloy steel forgings that calls for notch toughness testing on piping components. Forged flanges, fittings, valves, and other forged and machined parts are included. Chemical structure, mechanical properties, and impact tests for notch durability are all covered in this specification.
The ASTM A350 LF2 is a forged carbon/low-alloy steel grade of forged flanges, forged fittings, and forged valves that are intended for low-temperature operation and must pass notch durability inspection. The LF2 steels are divided into two classes: Class 1 and Class 2.
Flanges made to ASTM A350 LF3 requirements can withstand temperatures as low as 150 degrees Fahrenheit (LF3.) These ASTM A350 LF3 Flanges are primarily used in high-energy/high-temperature channeling applications. All ASTM A350 LF3 Flanges are available with either a raised face or a flat face. At ambient temperature, the working pressure for a B16.5 ASTM A350 LF3 Flange is approximately 2.4 times the Flange Class.
Viha Steel & Forgings is one of the famous providers of ASTM A350 LF1, LF2, LF3 Carbon Steel Flanges which are against rough and non-destructive and are dimensionally precise. The austenitic structure additionally gives ASME SA350 LF1 / LF2 / LF3 Carbon Steel Slip On Flanges great sturdiness, even down to cryogenic temperatures. ASTM A350 LF1 / LF2 / LF3 Low-Temperature Carbon Steel Flanges are fabricated utilizing quality amalgams and trend-setting innovation. Likewise, our quality monitors thoroughly check ASTM A350 LF1 / LF2 / LF3 Carbon Steel Flanges on stringent parameters for guaranteeing its high caliber.
Specifications | ASTM A350 LF2 / ASME SA350 |
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Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
Size Range | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000, as per Customer Requirements |
Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
Surface | pickling, annealing, bright, sandblast, hairline |
Type | Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 WNRF Flanges, Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 Blind Flanges, Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 Threaded Flanges, Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 Slip On Flanges, Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 Blind Flanges, Carbon Steel A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2 Lap Joint Flanges |
Connection type | Raised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue, Groove, Small Tongue, Groove. |
Test Certificates | EN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc |
Element | Weight % |
Carbon | 0.08 – 0.15 |
Silicon | 0.15 – 0.50 |
Manganese | 0.30 – 0.60 |
Phosphorus | 0.025 max * |
Sulfur | 0.025 max * |
Molybdenum | 0.90 – 1.10 |
Chromium | 2.00 – 2.50 |
Nickel | 0.5 max |
Property | Values |
Ultimate Tensile Strength * | 95 min Ksi (655 Mpa) |
0.2 % Yield Strength * | 75 min Ksi (517 Mpa) |
Elongation * | 17 % min |
Reduction of Area * | 35 % min |
Charpy Impact Toughness | 42 mean/ 33 min J at –18o C |
Hardness | 197 – 237 BHN (75 Ksi min) |
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 |
Product | Size | |
A350 LF1, LF2, LF3 LTCS Slip-On Flanges | A350 LF1, LF2, LF3 LTCS Threaded Flanges | 1/2″ – 48″ Raised Face or Flat Face |
A350 LF1, LF2, LF3 LTCS Blind Flanges | A350 LF1, LF2, LF3 LTCS Reducing Flanges | |
A350 LF1, LF2, LF3 LTCS Lap Joint Flanges | A350 LF1, LF2, LF3 LTCS Plate Flanges | |
A350 LF1, LF2, LF3 LTCS Weld Neck Flanges | A350 LF1, LF2, LF3 LTCS Socket Weld Flanges |