Highly Durable ASTM A312 TP316L Stainless Steel Studded Fin Tube
Highly Durable ASTM A312 TP316L Stainless Steel Studded Fin Tube
What is studded fin tube?
Studed fin tube is made by electrical resistance welding specially formed studs(round pins ) in rows around the tube. The Studs can be supplied in a variety of sizes and shapes. Stud tube has a very high heat transfer efficiency. The heat exchange efficiency is equivalent to 2-3 times that of the bare pipe.
Features of a Studded Fin Tube:
-It occupies less space and is, therefore, compact
-Highly durable
-Preferred over Finned tubes as they act as heat transfer systems
-Enhanced performance
Manufacturing Range (Studded Fin Tube):
|
Sr. No |
Particulars |
Range |
|
1 |
Base Tube Material |
Stainless Steel, Carbon Steel, Alloy Steel, Titanium , Copper, Duplex Stainless Steel, Inconel etc. (all material in the theoretical limit) |
|
2 |
Base Tube Outside Diameter |
60 mm to 200 mm |
|
3 |
Base Tube Thickness |
3 mm to 12.70mm Above |
|
4 |
Base Tube Length |
2000 mm Min To 15000 mm |
|
5 |
Stud Material |
Carbon Steel/Stainless Steel/Alloy Steel |
|
6 |
Stud Thickness |
6mm to 16mm |
|
7 |
Stud Density |
15.88mm or 63 Studs Per Plate Per Meter (Can Be Customized to Clients Requirements) |
|
8 |
Stud Height |
12.7mm to 63.5mm |
|
9 |
Bare Ends |
As per Client Requirement |
Size Reference for Different Types of Finned Tubes
| Type | Description | Base tube | Fin specification (mm) | ||
| O.D. (mm) | Fin pitch | Fin height | Fin thick | ||
| Embedded | G-type fin tueb | 16-63 | 2.1-5 | <17 | ~0.4 |
| Extruded | Single metal combined metal | 8-51 | 1.6-10 | <17 | 0.2-0.4 |
| Low fin tube t-type fin tube | 10-38 | 0.6-2 | <1.6 | ~0.3 | |
| Bamboo tube corrugated tube | 16-51 | 8-30 | <2.5 | / | |
| Wound | l/kl/ll type fin tube | 16-63 | 2.1-5 | <17 | ~0.4 |
| String | String fin tube | 25-38 | 2.1-3.5 | <20 | 0.2-0.5 |
| U-type | U-type tube | 16-38 | / | / | / |
| Welding | HF-welding fin tube | 16-219 | 3-25 | 5-30 | 0.8-3 |
| H/HH type fin tube | 25-63 | 8-30 | <200 | 1.5-3.5 | |
| Studed fin tube | 25-219 | 8-30 | 5-35 | φ5-20 | |
Chemical Composition of TP316L
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 316L | Min | - | - | - | - | - | 16.0 | 2.00 | 10.0 | - |
| Max | 0.03 | 2.0 | 0.75 | 0.045 | 0.03 | 18.0 | 3.00 | 14.0 | 0.10 |
Equivalent Material of 316L
| Grade | UNS No | Old British | Euronorm | Swedish SS |
Japanese JIS |
||
| BS | En | No | Name | ||||
| 316L | S31603 | 316S11 | - | 1.4404 | X2CrNiMo17-12-2 | 2348 | SUS 316L |
Physical Properties of ASTM A312 TP 316L Seamless Pipes
| Grade | Density (kg/m3) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) |
Specific Heat 0-1000C (J/kg.K) |
Elec Resistivity (nΩ.m) |
|||
| 0-1000C | 0-3150C | 0-5380C | At 1000C | At 5000C | |||||
| 316/L/H | 8000 | 193 | 15.9 | 16.2 | 17.5 | 16.3 | 21.5 | 500 | 740 |
Mechanical Properties
| Tensile Requirements | TP316 | TP316L |
|---|---|---|
| Tensile Strength min. MPa [ksi] |
515 [75] |
485 [70] |
| Yield Strength min. MPa [ksi] |
205 [30] |
170 [25] |
| Elongation in 2", min, % (*L) |
35 | 35 |
| Elongation in 2", min, %(*T) |
25 | 25 |
Applications:
Steel studded tubes are used instead of finned tubes for heat transfer in the petrochemical industry, generally in furnaces and boilers where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or aggressive cleaning.
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