| 标准： | ASTM A335/ASME SA335 | 底管材料 | P9 |
|---|---|---|---|
| 鳍片材料 | 11CR | 底管尺寸： | 1” To 12.75” |
| 鳍片高度： | 0.375” To 1.25” | 鳍片厚度： | 20ga (.035″) 至 16ga (.060″) |
| 鳍片宽度： | 5/32″ 或 5/16″ | Fin Pitch： | 每英寸 1 至 7 个鳍 |
| 强光 | Heat Transfer Serrated Fin Tube， Serrated Fin Tube For Heat Transfer | ||
ASTM A335/ASME SA335 P9 11CR Serrated Fin Tube for Heat Transfer
概述：
TONG CHUANG Group's Welded Helical Serrated Finned Tubes are produced in the same manner as solid fin， except that before the fin strip is formed around the tube， the fin strip is cut (or “serrated”) crosswise from one edge (which will become the outer edge of the fin segments) to within 1/4″ of the other edge， leaving an uncut portion that will become a continuous base for the fin segmen ts.
The interval between cuts (which determines the segment width after the strip is formed around the tube) may be specified as either 5/32″ or 5/16″.
After being cut， the fin strip is held under tension and confined laterally as it is formed around the tube， thereby ensuring forceful contact with the tube surface.
As the fin strip is formed around the tube its outer (serrated) edge spreads， opening the segments like petals of a daisy. A continuous weld is applied at the point where the fin strip first begins to bend around the tube diameter using TONG CHUANG Group's unique gas metal arc welding (GMAW) process. This welding process creates the strongest fin to tube attachment in the industry， excellent heat transfer characteristics， low fin-side pressure drop and little to no change in grain microstructure and physical characteristics even when 3%-9% chromium tubes are used.
说明
| 标准 | ASTM A335 及其同等的 ASME、DIN 和 EN 标准 |
| 底管材料 | Gr.P9 |
| 鳍片材料 | 碳钢 |
| 底管外径 | 1'' to 12.75'' |
| 翅片高度 | 0.375'' to 1.25'' |
| 鳍片厚度 | 20GA（0.035 英寸）至 16GA（0.060 英寸） |
| 鳍片间距 | 每英寸 1 至 7 个鳍片 |
| 管端 | 平端，斜端 |
| 裸端 | 按客户要求提供 |
| 焊接工艺 | GMAW |
| 生产能力 | 每天超过 5000 米 |
化学成分
| 等级 | C | 锰 | P | S | Si | Cr | 莫 |
| P9 | 0.15 最大值 | 0.30-0.60 | 最大 0.025 | 最大 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 |
机械性能
| 等级 | 拉伸强度，最小，ksi (MPa) | 屈服强度， 最小， ksi (MPa) | 2 英寸伸长率 或 50 毫米，最小值（%） | 热处理温度， 最小，°F（°C） | |
| 纵向 | 横向 | ||||
| P9 | 60(415) | 30(205) | 30 | 20 | 1250(675) |
申请：
1. Heat Exchangers: These fin tubes are prevalently used in heat exchangers to maximize the efficiency of heat transfer. The serrated fins increase the surface area of the tube， facilitating better heat exchange between the fluid within the tube and the surrounding environment through convection.
2. Boilers: SA335 P9 11CR serrated fin tubes are utilized in boilers to improve heat transfer efficiency. The serrations on the fin tube create turbulent flow， enhancing the transfer of heat from the hot gases to the water inside the tubing.
3. Condensers: In condenser applications， these fin tubes are employed to facilitate the condensation of vapor into liquid form by efficiently transferring heat away from the working fluid. The serrated fins enable better heat dissipation， improving the overall performance of the condenser.
4. Air Coolers: SA335 P9 11CR serrated fin tubes are also used in air cooler units where they help in cooling a hot gas stream by increasing the contact area between the hot gas and the cooling medium (e.g.， air). The serrated fins aid in dissipating heat effectively， leading to efficient cooling.
5. Process Industries: These fin tubes find applications in various process industries such as petrochemical， refinery， and chemical plants where the efficient transfer of heat is crucial for numerous operations like distillation， evaporation， and chemical reactions.
6. Power Plants: SA335 P9 11CR serrated fin tubes play a vital role in power plants for heat recovery applications， such as in steam generators， economizers， and air preheaters. They help in maximizing energy efficiency by increasing the heat transfer rate.
