Grades of ASTM A350 Carbon Steel Flanges

Grades of ASTM A350 Carbon Steel Flanges, ASTM A350 LF2, ASTM A350, ASTM A350 LF1, ASTM A350 LF3, Carbon Steel Flanges, Carbon Steel Flanges ASTM A350

What is ASTM A350?
ASTM A350 is the standard specification covering carbon and low-alloy steel forged or ring-rolled flanges, forged fittings, and valves intended primarily for low-temperature service and requiring notch toughness testing.

 

Grades of ASTM A350 Carbon Steel Flanges

ASTM A350 LF1 Flange

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.

ASTM A350 LF2 Flange

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.

ASTM A350 LF3 Flange

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.

 

Why should choose us

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.

Carbon Steel ASTM A350 LF1, LF2, LF3 Flanges Specifications, Sizes

SpecificationsASTM A350 LF2 / ASME SA350
StandardANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size Range1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000, as per Customer Requirements
DimensionsANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Surfacepickling, annealing, bright, sandblast, hairline
TypeCarbon 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 typeRaised Face, Flat Face, Ring Type Joint, Lap-Joint Face, Large Male-Female, Small Male-Female, Large Tongue, Groove, Small Tongue, Groove.
Test CertificatesEN 10204/3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report, etc

ASTM A350 LF1 LF2 LF3 Carbon Steel Flanges Chemical Composition

ElementWeight %
Carbon0.08 – 0.15
Silicon0.15 – 0.50
Manganese0.30 – 0.60
Phosphorus0.025 max *
Sulfur0.025 max *
Molybdenum0.90 – 1.10
Chromium2.00 – 2.50
Nickel0.5 max

ASTM A350 LF1 LF2 LF3 Carbon Steel Flanges Mechanical Properties

PropertyValues
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 Toughness42 mean/ 33 min J at –18o C
Hardness197 – 237 BHN (75 Ksi min)

ASTM A350 LF1 LF2 LF3 Carbon Steel Flanges Related Types

ASTM A350 LF1 LF2 LF3 Carbon Steel Flanges Dimensions

Nominal Pipe SizeFlanges Inside Diameter (ID)
(inch)
Flanges Outside Diameter (OD)
(inches)
Class 150Class 300Class 400Class 600Class 900
1/20.841.8752.1252.1252.1252.50
3/41.062.252.6252.6252.6252.75
11.312.6252.8752.8752.8753.125
1 1/41.6633.253.253.253.50
1 1/21.913.3753.753.753.753.875
22.384.1254.3754.3754.3755.625
2 1/22.884.8755.1255.1255.1256.50
33.505.3755.8755.8755.8756.625
44.506.8757.1257.007.6258.125
55.567.758.508.3759.509.75
66.628.759.8759.7510.5011.375
88.621112.12512.0012.62514.125
1010.7513.37514.2514.12515.7517.125
1212.7516.12516.62516.5018.0019.625

ASTM A350 LF1 LF2 LF3 Carbon Steel Flanges Types

ProductSize
A350 LF1, LF2, LF3 LTCS Slip-On FlangesA350 LF1, LF2, LF3 LTCS Threaded Flanges1/2″ – 48″
Raised Face or Flat Face
A350 LF1, LF2, LF3 LTCS Blind FlangesA350 LF1, LF2, LF3 LTCS Reducing Flanges
A350 LF1, LF2, LF3 LTCS Lap Joint FlangesA350 LF1, LF2, LF3 LTCS Plate Flanges
A350 LF1, LF2, LF3 LTCS Weld Neck FlangesA350 LF1, LF2, LF3 LTCS Socket Weld Flanges

 

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