High Pressure Carbon Steel Pipe Flange

QS Flange: Pipe Flange China Suppliers

Forged carbon steel pipe flange rated to 2500LB in 1/2 to 24 inch to ASME B16.5, with tensile above 485 MPa and service from -29 to 425 °C.

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One-Minute Overview

Forged carbon steel flange rated to 2500LB, in sizes 1/2 to 24 inch.
Tensile above 485 MPa and yield above 250 MPa after forging.
Service range -29 °C to 425 °C, Charpy V-notch impact at least 27 J.
RF or FF faces to ASME B16.5 for gas, refinery and chemical duty.

This forged carbon steel pipe flange is built for the top of the pressure range: classes from 150LB to 2500LB, sizes from 1/2 to 24 inch, RF or FF faces and ASME B16.5 dimensions. The point of the forging route is metallurgical rather than cosmetic: a denser, finer grained section that holds its shape when the class climbs to 2500LB.

Name: High Pressure Carbon Steel Pipe Flange
Size: 1/2-24 Inch
Pressure: 150LB-2500LB
Material: Carbon Steel
Flange Face: RF, FF
Standard: ASME B16.5
Process Method: Forged

Forging refines the grain and closes the internal voids that casting leaves behind, and the numbers follow. Tensile strength exceeds 485 MPa and yield strength sits above 250 MPa, values cast flanges seldom reach. At 2500LB the body keeps its structural integrity without deformation. Carbon steel also holds a stable service band from -29 °C to 425 °C, with creep resistance and Charpy V-notch impact of at least 27 J. Cyclic duty is where the difference shows up in maintenance budgets. Fatigue life tests put the forged flange 30 to 50 percent ahead of cast equivalents, which is why it is preferred on lines with pressure swings or repeated starts. Surface hardness of HB 150 to 200 adds wear resistance where abrasive or corrosive media are present. RF and FF faces cover the usual gasket arrangements, and each batch goes through non-destructive testing before it ships. Under normal operating conditions the service life is often quoted beyond 20 years.

FAQ

Q1. What mechanical values come with the forged body?

Tensile strength above 485 MPa and yield strength above 250 MPa. Charpy V-notch impact is at least 27 J, and surface hardness falls between HB 150 and 200. The forged structure also gives a fatigue life 30 to 50 percent better than cast flanges in cyclic service.

Q2. Will it hold at 2500LB without deforming?

That is the class the forging route is there for. Under 2500LB the body maintains its structural integrity without deformation, and the same forged section carries the creep resistance and impact toughness the high classes need. The gasket and the bolting still have to suit the class; the flange alone does not make the joint.

Q3. How does the -29 °C to 425 °C band affect my gasket choice?

The flange body is rated across that band, but the gasket has to survive the same temperature, so pick it first. RF and FF faces accept the common gasket arrangements, and the face finish should match what the gasket maker asks for. Outside the band, ask before ordering rather than assuming.

Q4. What payment terms do you accept?

T/T, L/C at sight and other internationally accepted terms. The exact terms are agreed with you before production starts, because the payment schedule has to match the order value, the shipping method and the delivery schedule you need — which is also why we confirm them up front rather than after shipment.

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