Overview
What is TUBESHEET? ASTM A182 F316L TUBESHEET, which the tubesheet is a hole slightly larger than the outer diameter of the tube drilled on the circular steel plate, a fitting that inserts and welds the pipe to fix it. The accuracy of tube sheet processing, especially the tube hole spacing and tube diameter tolerance, verticality, and smoothness greatly affect the assembly and performance of the chemical equipment listed above. A tube sheet may be covered in a cladding material which serves as a corrosion barrier and insulator. Low carbon steel tube sheets can include a layer of a higher alloy metal bonded to the surface to provide more effective corrosion resistance without the expense of using the solid alloy,which means it can save a lot of cost.
Among the most common types of heat transfer equipment used in industrial applications are the various configurations of shell-and-tube heat exchangers. Suitable for a range of pressure and temperature conditions, shell-and-tube heat exchangers can be robust enough to handle corrosive or even lethal fluids.
The shell-and-tube heat exchanger design allows heat transfer between two independent, pressurized chambers through the walls of the tubes. The design consists of an array of tubes, which is connected on each side to a flat plate called a tubesheet. The tubesheet also separates the shell and tube sides of the exchanger. Baffles on the outside of the tubes direct the flow of the shell-side fluid back and forth across the tubes to promote heat transfer. The process fluid can flow through either the shell or tube side, with the opposite side typically acting as the service side (usually a heating or cooling medium). The exchanger also can have a process fluid on both sides.
Specification
ASTM A182/A182M-21 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service.
ASTM A182 standard specification is for forged and rolled alloy and stainless steel pipe flanges, fittings, valves and parts for high temperature service. Common grades of alloy steel is Grade F5, F9, F11, F22, stainless steel F304/L and F316/L. The standard applies to forged low alloy steel and stainless steel pipe parts for use in pressure systems. These include flanges, fittings, valves and similar parts that meet specified size or size standards. And it includes several grades of low carbon alloy steel and ferritic, martensitic, austenitic and ferritic-austenitic stainless steels. So it should be selected according to the design and use requirements.
ASTM A182 F316L TUBESHEET Equivalent Grades
| TANDARD | WERKSTOFF NR. | JIS | BS | GOST | AFNOR | EN |
| SS 316 | 1.4401 / 1.4436 | SUS 316 | 316S31 / 316S33 | – | Z7CND17‐11‐02 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| SS 316L | 1.4404 / 1.4435 | SUS 316L | 316S11 / 316S13 | 03Ch17N14M3 / 03Ch17N14M2 | Z3CND17‐11‐02 / Z3CND18‐14‐03 | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| SS 316H | 1.4401 | |||||
| SS 316Ti | 1.4571 | SUS 316Ti | 320S31 | 08Ch17N13M2T | Z6CNDT17‐123 | X6CrNiMoTi17-12-2 |
Chemical Composition
| Grade | Cr | Mo | C | Mn | Si | P | S | Ni |
| 316 | 16.00 –18.00 | 2.00 –3.00 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 11.00 –14.00 |
| 316L | 16.00 –18.00 | 2.00 –3.00 | 0.035 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 10.00 –14.00 |
| 316H | 16.00 –18.00 | 2.00 –3.00 | 0.10 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 10.00 –14.00 |
| 316Ti | 16.00 –18.00 | 2.00 –3.00 | 0.08 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 10.00 –14.00 |
Mechanical Properties
| Grade | Tensile Strength | Melting Point | Yield Strength (0.2%Offset) | Density | Elongation |
| 316 | Psi – 75000 , MPa – 515 | 1400 °C | Psi – 30000 , MPa – 205 | 8.0 g/cm3 | 35 % |
| 316L | Psi – 75000 , MPa – 515 | 1399 °C | Psi – 30000 , MPa – 205 | 8.0 g/cm3 | 35 % |
| 316H | Psi – 75000 , MPa – 515 | 1400 °C | Psi – 30000 , MPa – 205 | 8.0 g/cm3 | 35 % |
| 316Ti | Psi – 75000 , MPa – 515 | 1399 °C | Psi – 30000 , MPa – 205 | 8.0 g/cm3 | 35 % |
Applications
- Tubular Heat Exchanger.
Boiler.
Pressure vessel.
Steam turbine.
Large central air conditioning.
Other industries.
