ASME SA266 Gr.2N Forged Carbon Steel Tube Side Flange for Heat Exchanger
ASME SA266 Gr.2N tube side flange is a forged carbon steel pressure component manufactured for shell and tube heat exchangers and other pressure vessel equipment.
The flange is installed on the tube-side connection or channel-side assembly according to the heat exchanger design. It provides a bolted connection between mating components and allows equipment sections to be assembled and disassembled for inspection, maintenance, or tube bundle servicing.
Unlike standard pipeline flanges, heat exchanger tube side flanges may require customized outside diameter, thickness, bolt hole arrangement, hub geometry, bore dimensions, and sealing surfaces. Therefore, the final dimensions are normally manufactured according to approved engineering drawings and project specifications.
ASME SA266 covers carbon steel forgings for pressure vessel components, and Grade 2 is one of the commonly specified grades for forged pressure equipment components.
Material Standard: ASME SA266 / ASTM A266
Material Grade: Grade 2N
Material Type: Carbon Steel Forging
Product Type: Tube Side Flange
Manufacturing: Forging and Machining
Application: Shell and Tube Heat Exchanger
The designation Gr.2N generally indicates Grade 2 material supplied in the normalized condition, subject to the applicable material and purchase requirements.
For Grade 2 material, the applicable chemical composition and mechanical property requirements should be verified against the specified edition of ASME SA266 and the project documentation. Existing product data for this grade identifies Grade 2 as a carbon steel forging used for pressure vessel components and heat exchanger parts.
In a shell and tube heat exchanger, the tube-side flange forms part of the connection between the channel, tube-side cover, tubesheet assembly, or other mating pressure components, depending on the exchanger configuration.
The flange design may include:
The actual configuration should follow the heat exchanger general arrangement drawing and pressure equipment design requirements.
A bolted flange connection allows the connected section to be removed when the equipment requires:
The connection design, bolt load, gasket type, and sealing surface requirements should be determined according to the applicable equipment design specification.
SA266 Grade 2 carbon steel is forged into a flange blank with sufficient machining allowance according to the required component dimensions.
The forging process is suitable for manufacturing pressure equipment components with customized geometry.
The Gr.2N designation is associated with a normalized supply condition.
The final heat treatment procedure should comply with the applicable material specification, component size, and purchase requirements.
Machining operations may include:
The finished flange can be inspected according to project requirements for:
| Item | Specification |
|---|---|
| Product Name | ASME SA266 Gr.2N Forged Carbon Steel Tube Side Flange |
| Material Standard | ASME SA266 / ASTM A266 |
| Material Grade | Grade 2N |
| Material Type | Carbon Steel Forging |
| Product Type | Heat Exchanger Tube Side Flange |
| Manufacturing | Forged & Machined |
| Dimensions | Customized According to Drawing |
| Application | Shell and Tube Heat Exchanger |
The flange can be manufactured according to customer drawings and equipment specifications.
| Parameter | Specification |
|---|---|
| Outside Diameter | Customized |
| Bore Diameter | Customized |
| Thickness | Customized |
| Bolt Hole Arrangement | According to Drawing |
| Flange Facing | According to Design Requirement |
| Hub / Neck Geometry | Customized |
| Machining Allowance | According to Drawing |
| Inspection | According to Project Requirement |
For custom heat exchanger flanges, the applicable dimensional standard should be determined by the actual flange configuration and project specification rather than automatically applying a standard piping flange dimension. The existing product page also identifies the component as customizable for heat exchanger use.
ASME SA266 Gr.2N tube side flanges can be used in shell and tube heat exchanger assemblies where a forged carbon steel flange is specified for the tube-side or channel-side connection.
Typical equipment includes:
SA266 carbon steel forgings are also used for pressure vessel components manufactured according to applicable engineering and project requirements.
Depending on the specified material selection and operating conditions, the component may be used in:
Inspection may include:
Key inspection parameters may include:
According to project requirements, inspection may include:
Additional examination requirements can be applied according to the pressure equipment specification
