Orifice Flange Set Welding Neck 06'' 2500 RJ EP: 27.55 MM A 350 LF2 ASME B 16.3

Orifice Flange Set: This indicates that the flange is specifically designed for orifice flow measurement applications.

Welding Neck: The flange has a welding neck design, allowing it to be welded directly to the pipeline for a strong and leak-proof connection.

06'': This specifies the nominal pipe size (NPS) of the flange, indicating that it is designed to fit pipes with a nominal diameter of 6 inches.

2500 RJ: "2500" denotes the pressure rating of the flange, indicating that it is designed to withstand a pressure of 2500 pounds per square inch (psi). "RJ" stands for "Raised Face Joint," indicating that the flange has a raised face for better sealing with gaskets.

EP: 27.55 MM: "EP" likely stands for "Effective Projection," which refers to the length of the neck of the flange measured from the back of the flange to the point where it intersects with the pipeline. "27.55 MM" specifies the effective projection length, indicating that it is 27.55 millimeters in this case.

A 350 LF2: This refers to the material grade of the flange. A 350 LF2 is a low-temperature carbon steel material suitable for use in low-temperature service applications.

ASME B 16.3: This indicates that the flange is manufactured according to ASME B16.3 standards, which specify the dimensions and tolerances for pipe flanges and flanged fittings in the range of NPS 1/2 through NPS 24.

Composition  A 350 LF2 :

Carbon (C): 0.30% max

Manganese (Mn): 0.60-1.35%

Phosphorus (P): 0.035% max

Sulfur (S): 0.040% max

Silicon (Si): 0.15-0.30%

Copper (Cu): 0.40% max

Nickel (Ni): 0.40% max

Chromium (Cr): 0.30% max

Molybdenum (Mo): 0.12% max

Vanadium (V): 0.08% max

Aluminum (Al): 0.04% max

Nitrogen (N): 0.020% max

Mechanical Properties:

Tensile Strength: 485-655 MPa

Yield Strength: 250 MPa min

Elongation: 22% min

Reduction of Area: 30% min

Hardness: 187 HB max

Applications:

A350 LF2 is commonly used in various industries for low-temperature applications such as oil and gas, petrochemical, power generation, and more.

It's suitable for use in environments where toughness, impact resistance, and corrosion resistance at low temperatures are required.

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