The term for the two products is different in the knowledge industry. It is said that the fin tube may be a person who has been engaged in the industry for a long time. The substance and structure are not very different. Ordinary steel is welded on seamless steel pipe. It is generally believed that the fin height in the spiral fin tube is higher than that in the spiral fin tube (this is not the main factor, fin height can be customized according to customer requirements). However, the spiral finned tube relative to the spiral finned tube for the use of the harsh environment, the welding process is relatively rigorous. That said, it is only a new product of integral steel spiral finned tube we have not yet known or seen, the current market is basically understood as a product, but the need for employees to know it, easy to serve customers.
What is the difference between spiral finned tube and spiral finned tube?
The main function of finned tube and finned tube is to increase heating surface (or heat dissipation) and improve heat transfer山東中寶金屬材料有限公司(中寶管業) efficiency.
Difference between welding stre網址：www.xrywfgg.comngth and stability
1.1 拉脫力試驗: 大于200MPa 或者鋼管部分撕裂
1.1 pull-out test: greater than 200MPa or partial tear of steel pipe.
1.2焊縫寬度: 大于翅片厚度 即焊著率>99%1.3焊接強度穩定性: 每班首件做焊接試樣 達到2.1 或者2.2的要求
1.2 Weld Width: Thicker than Fin, i.e. Welding Rate > 99% 1.3 Welding Strength Stability: The first part of each shift to do welding specimens to meet the requirements of 2.1 or 2.2
1.4 焊縫抗彎曲試驗: 翅片左右彎曲20度 向左向右彎曲兩次 焊縫無裂紋
1.4 weld bending test: fins bending about 20 degrees to left to right bend two times weld without crack.
1.5 錘擊試驗: 平行于鋼管敲擊翅片上部 直到翅片脫落 翅片本身不得斷裂
1.5 hammer test: parallel to the top of the steel pipe beating the fins until the fins are detached, and the fins themselves must not be broken.
1.6 如果試驗失敗 必須啟用退火功能
1.6 if the test fails, the annealing function must be enabled.
Heat affected zone difference
Measurement with microscope and micro hardness tester
The depth of heat affected zone of steel tube is less than 0.5mm
Product size accuracy difference
3.1 翅片段全長 -1mm ~ +1mm 分段運動精度 -0.5mm ~ +0.5mm
3.1 wing segment full-length -1mm ~ +1mm segmented motion accuracy -0.5mm ~ +0.5mm
3.2 片距 -0.2mm ~ +0.2mm
3.2 slice distance -0.2mm ~ +0.2mm
3.3 翅片和鋼管垂直度 -1度 ~ +1度
3.3 fin and steel tube perpendicularity -1 ~ +1 degrees
3.4 同組對焊翅片平面度 -0.2mm ~ +0.2mm翅片本身厚度公差引起的高度差除外
3.4 the same group of welding fins flatness -0.2mm ~ +0.2mm fin thickness tolerance caused by height difference except.
3.5 同組對焊翅片高度差 -0.2mm ~ +0.2mm 翅片本身尺寸公差引起的高度差除外
3.5 the height difference of the welding fin is the same as that of the -0.2mm group, except for the height difference caused by the size tolerance of the fin +0.2mm.
3.6 雙管中心距離公差 -0.5mm ~ +0.5mm
3.6 double center distance tolerance -0.5mm ~ +0.5mm
3.7在同樣鋼管材料, 同樣片距和片數條件下, 不同翅片管焊接后長度變化一致
3.7 under the same steel tube material, the length of the finned tubes will be changed after welding with the same chip spacing and number of sheets.
Difference of welding speed
基管外徑25~51 翅片厚度2mm 每對焊接時間小于3秒 (不包括上下料時間和退火時間)
Welding time of each pair of fins with 25-51 outer diameter and 2 mm thickness is less than 3 seconds (excluding loading and unloading time and annealing time)信陽無縫鋼管