Girth Flanges
Girth flanges are used for mating two segments of a pressure vessel. These parts are also widely used in shell and tube heat exchangers and other process equipment to mate various components. There are two common kinds of girth flange such as welded hub joint, loose type (without hub).
Depended to design of equipment girth flange may has raised face gasket seating area. The seating area can be special surface finished which is suitable for better sealing and prevent leakage.
Why choose A105 Girth Flange:
Available material grades of girth flange
Carbon steel (A105, A266 CL2/CL4) |
Plate material of Baffle plate: A36, SS440, A516 Gr60/70 |
Low Temp Carbon steel (A350 LF2 CL1/CL2, LF3) |
High Yield Carbon steel (A694 F52/F60/F65/F70) |
Stainless steel (A182 F304/L, F304H, F310, F316/L, F317/L, F321/H, F347/H, F44) |
Low alloy steel (A182 F1, F5, F9, F11 CL1/CL2/CL3, F12 CL1/CL2, F22 CL1/CL3, F23, F91, F92) |
Duplex stainless steel ( A182 F51, F53, F60) |
Alloy steel (Alloy 20, Alloy625/825/800) |
A105 Chemical Composition
ELEMENT | COMPOSITION, % |
Carbon | 0.35 max |
Manganese | 0.60-1.05 |
Phosphorus | 0.035 max |
Sulfur | 0.040 max |
Silicon | 0.10-0.35 |
Copper | 0.40 max (1) |
Nickel | 0.40 max (1) |
Chromium | 0.30 max (1-2) |
Molybdenum | 0.12 max (1-2) |
Vanadium | 0.08 max |
A105 Mechanical Characteristics
Mechanical Properties | Requirements |
---|---|
Tensile strength,min,psi [MPa] | 70000 [485] |
Yield strength,min,psi [MPa] | 36000 [250] |
Elongation, min, % | 30 |
Reductionofarea,min,% | 30 |
Hardness,HB,max | 187 |
A105 Reducing Flange Physical
Density (lb / cu. in.) | 0.284 |
Specific Gravity | 7.9 |
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) | 0.107 |
Melting Point (Deg F) | 2740 |
Thermal Conductivity | 360 |
Mean Coeff Thermal Expansion | 6.7 |
Modulus of Elasticity Tension | 30 |
Modulus of Elasticity Torsion | 11 |
Girth flanges Application:
Piping systems: Girth flanges are used to connect sections of pipes together in pipelines for transporting fluids or gases.
Pressure vessels: Girth flanges are used to connect the shell and heads of pressure vessels, ensuring a secure and leak-proof connection.
Heat exchangers: Girth flanges are used in heat exchangers to connect the tubes or plates to the shell, allowing for efficient heat transfer.
Boilers: Girth flanges are used in boilers to connect the various components of the boiler system, such as the steam drum, tubes, and headers.
Storage tanks: Girth flanges are used in storage tanks to connect the tank shell to the roof or bottom, providing a secure and leak-proof seal.