ASTM SA266 GR.2N Channel Cover Flange Tube Sheet For Heat Exchanger Parts
ASTM SA266 GR.2N Channel Cover Flange Tubesheet
What is tubesheet ?
A tube sheet is a plate which is used to support the tubes in a shell-and-tube heat exchanger. The tubes are aligned in a parallel way, and supported and held in place by tube sheets. The tube sheet is a circular plate which is perforated so that the tubes can fit through the openings.
Description
ASTM SA266 GR.2N is a specification for carbon steel forgings for pressure vessel components. In this context, a Channel Cover Flange Tubesheet would refer to a component used in the construction of heat exchangers or pressure vessels.
The Channel Cover Flange Tubesheet would typically be made from ASTM SA266 GR.2N material, which is a low carbon steel grade suitable for high temperature and pressure applications. This material offers good strength and corrosion resistance, making it a suitable choice for use in demanding environments.
The ASTM SA266 GR.2N Channel Cover Flange Tubesheet would be a critical component in the construction of pressure vessels, ensuring the e and efficient operation of the equipment. It is important to ensure that the material and design specifications meet the required standards for the specific application.
Chemical Composition Requirements
| Item | Chemical Req. for ASTM A266, % | ||
| Gr. 1 & 2 | Gr. 3 | Gr. 4 | |
| C | ≤ 0.30 | ≤ 0.35 | ≤ 0.30 |
| Mn | 0.40~1.05 | 0.80~1.35 | 0.80~1.35 |
| P | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| S | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| Si | 0.15~0.35 | 0.15~0.35 | 0.15~0.35 |
Heat Treatment
After forging and before reheating for heat treatment, the forgings in accordance with ASTM A266 shall be cooled in such a manner as to prevent injury and to accomplish transformation. All the ASTM A266 forgings shall be heat treated by one of the four processes: annealing, normalizing, normalizing and tempering, or liquid quenching and tempering. When tempering is performed, it shall be at a subcritical temperature, but no less than 1100°F [595°C].
Mechanical Properties
| Tensile Requirements |
Gr. 1 | Gr. 2 & 4 | Gr. 3 |
|---|---|---|---|
| T.S min. ksi [Mpa] |
60~85 [415~585] |
70~95 [485~655] |
75~100 [515~690] |
| Y.S min. ksi [Mpa] |
30 [205] |
36 [250] |
37.5 [260] |
| EL. in 2" or [62.5 mm] min. % |
23 [21] |
20 [18] |
19 [17] |
| R.o.A min. % |
38 | 33 | 30 |
| ASTM A266 Grade |
Brinell Hardness HBW |
|---|---|
| 1 | 121~170 |
| 2 | 137~197 |
| 3 | 156~207 |
| 4 | 137~197 |
Application
- Heat Exchangers and Condensers
- Seawater Systems
- Oil and Gas Industry
- Chemical Processing
- Power Generation
- Desalination Plants
- Petrochemical Industry
- Shipbuilding
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