Finned Tube ASTM A335 Grade P5 Alloy Steel Studded Pin Pipe For
Heat Exchanger
Studded Pipe also called studded tubes, Nailhead Pipe or stud Pipe. Studded
pipes are used as an alternative to finned tubes in heat exchangers
mainly in the petrochemical industry where the surface is exposed
to particular corrosion and aggression by gasses and vapors.
Studded pipe advantages:
Studded pipe advantages:
Because of their relatively thicker Cross-section as compared to
fins, Studded pipe is one of the mechanically Strongest
extended-surfaces Available. Although strength may not be a
consideration for heat Transfer performance, it may be important
when the application requires the extended surface to carry the
weight of the tube at supports, or where severe mechanical abuse is
expected in service or during cleaning.
Fin Tube Specification
| PRODUCT | TYPE | NAME | BARE TUBE MATERIAL | FIN MATERIAL |
| Heat Exchanger Finned Tube | EMBEDDED | G-TYPE FIN TUBE | CARBON STEEL, COPPER, STAINLESS STEEL, ALLOY | ALUMINUM |
| EXTRUDED | SINGLE METAL GOMBINED METAL | CARBON STEEL, COPPER, STAINLESS STEEL, ALLOY | COPPER, ALUMINUM |
LOW FIN TUBE T-TYPE FIN TUEB | CARBON STEEL, COPPER, STAINLESS STEEL, ALLOY | / |
BAMBOO TUBE CORRUGATED TUBE | CARBON STEEL, COPPER, STAINLESS STEEL, ALLOY | / |
| WOUND | L/KL/LL TYPE FIN TUBE | CARBON STEEL, COPPER, STAINLESS STEEL, ALLOY | COPPER,ALUMINUM |
| STRING | STRING FIN TUBE | ALUMINUM, COPPER, CARBON STEEL, STAINLESS STEL | ALUMINUM, COPPER, CARBON STEEL, STAINLESS STEL |
| U-TYPE | U-TYPE TUBE | CARBON STEEL, COPPER, STAINLESS STEEL | / |
| WELDING | HF WELDING FIN TUBE | CARBON STEEL, STAINLESS STEEL, ALLOY | CARBON STEEL, STAINLESS STEEL, ALLOY |
| H/HH TYPE FIN TUBE | CARBON STEEL, STAINLESS STEEL, ALLOY | CARBON STEEL, STAINLESS STEEL, ALLOY |
| STUDDED FIN TUBE | CARBON STEEL, STAINLESS STEEL, ALLOY | CARBON STEEL, STAINLESS STEEL, ALLOY |
Alloy Steel Chemical Compositions
| Grade | UNS Designation | Composition, % |
| Carbon | Manganese | Phosphorus, max | Sulfur, max | Silicon | Chromium | Molybdenum |
| P1 | K11522 | 0.10-0.20 | 0.30-0.80 | 0.025 | 0.025 | 0.10-0.50 | -- | 0.44-0.65 |
| P2 | K11547 | 0.10-0.20 | 0.30-0.61 | 0.025 | 0.025 | 0.10-0.30 | 0.50-0.81 | 0.44-0.65 |
| P5 | K41545 | 0.15MAX | 0.30-0.60 | 0.025 | 0.025 | 0.50MAX | 4.00-6.00 | 0.45-0.65 |
| P9 | K90941 | 0.15MAX | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 1.00-1.50 | 0.44-0.65 |
| P11 | K11597 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| P12 | K11562 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.5MAX | 0.80-1.25 | 0.44-0.65 |
| P15 | K11578 | 0.05-0.15 | 0..30-0.60 | 0.025 | 0.025 | 1.15-1.65 | -- | 0.44-0.65 |
| P21 | K31545 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50MAX | 2.65-3.35 | 0.80-1.06 |
Technical Details/Base Tube Details
Tube Diameter : 20 mm OD Min to 219 mm OD Max.
Tube Thickness : Minimum 2 mm up to 16mm
Tube Material : Carbon Steel, Stainless Steel, Alloy Steel, Corten
steel, duplex Steel, Super Duplex Steel, Inconel, High Chrome High
Nickle & Incolloy, CK 20 material and some other material.
Fin Details
Fins Thickness : Min. 0.8 mm to Max. 4 mm
Fins Height : Min 0.25” (6.35 mm) To Max.1.5” (38 mm)
Fin Density : Min 43 Fins Per Meter To Max. 287 Fins Per Meter
Material : Carbon Steel, Stainless Steel, Alloy Steel, Corten
steel, Duplex Steel and Incolloy.
For a rapid quotation, plz send with following requirement:
Number of pieces,
base tube: Diameter, thickness, length and material specification.
Fins: material specification, type (solid or serrated), height,
thickness, spacing, finned length and unfinned sections. Weld prep
details if required.
Delivery period required.
Advantages of Studded Tubes
1. As the pin rib of the studded tubes is a cantilever structure
with a compact structure, the pin rib will vibrate under the impact
of the air flow, making it difficult to accumulate soot.
2. due to the strong turbulent flushing of flue gas, the studded
tubes heat exchange element has high heat transfer efficiency and
strong self ash removal capability.
Application
The mainly applications for studded tubes is the process heat
recovery of the petrochemical industry, in areas of convection
ovens, vacuum generators for chemical processing, specially used in
petroleum applications. Studded pipes high resistance in the harsh
environments, such as sections of Sulfuric Acid atmospheres, makes
it very useful for the industries mentioned.
- Economizer
- Boilers
- Heat exhangers
- Tube Bundles
- Radiators
- Air Coolers
- Air Preheater
