| 标准： | ASTM A179 | 类型 | U 形弯曲翅片管 |
|---|---|---|---|
| 无损检测： | HT/UT/ET | 申请： | 锅炉 |
ASTM A179/ ASME SA179 CARBON STEEL SEAMLESS U BEND TUBE， FIN TUBE WITH BLACK PAINTING
概述
The ASTM A179 / ASME SA179 Seamless Tubes has similar grades and standards like ASTM A179/ A179M. It is viable in types like seamless / cold drawn / hot drawn etc. This tube product is available in custom-made size， diameter， and thickness. The Carbon Steel A179 Heat-Exchanger Tubes is strictly subjected to various tests in order to ensure the quality of the product. This grade of the tube is packed in wooden box or case in order to avoid external damage during the last stage of production. What's more， these tubes are used in various industrial applications and are available in market leading prices.
These Seamless Tube mainly find applications in Pressure Vessels， Cryogenic Pressure Vessels， High pressure Equipments， Tube Sheets of Heat Exchangers， Boilers， Air Pre Heater， Finned Tubes， Air Cooler Tubes， etc. They are used in Industries like Refineries， Power Plants， Steel Plants， Chemical Factories， Fertilizer plants， and Ship Building etc.
U Tubes are manufactured after the Straight Tubes are manufactured. The Bending is done in Cold State on an Automatic U Bending Machine. To ensure that wall thinning and diameter ovality are kept in control， bending of tubes Is done with a mandrel inserted in the tubes. Furthermore the U – Bend portion of the U-Tube is Stress Relieved in controlled conditions and cycle to give longer life.
The U bent tubes are finally 100% Tested for Hydrostatic Leak Test and then finally DP tested. These tubes are vulnerable to getting damaged in transit and hence are required to be handled with care. We ensure this by packing tubes in specially designed steel frames. These frames are fit into the wooden box o further ensure safety of the tubes.
规格
ASTM A179/A179M Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes.
化学成分
| C， % | 锰， % | P， % | S， % |
| 0.06-0.18 | 0.27-0.63 | 0.035 最大值 | 0.035 最大值 |
机械性能
| 拉伸强度，兆帕 | 屈服强度，兆帕 | 延伸， % | 硬度，HRB |
| 325 min. | 180 min. | 35 min. | 最大 72 |
Outside Diameter & Tolerance
| 外径，毫米 | Tolerance， mm |
| 3.2≤OD＜25.4 | ±0.10 |
| 25.4≤OD≤38.1 | ±0.15 |
| 38.1＜OD＜50.8 | ±0.20 |
| 50.8≤OD＜63.5 | ±0.25 |
| 63.5≤OD＜76.2 | ±0.30 |
| 76.2 | ±0.38 |
Wall thickness & Tolerance
| Outside Diamter， mm | 公差， % |
| 3.2≤OD＜38.1 | +20/-0 |
| 38.1≤OD≤76.2 | +22/-0 |
应用：
- Pharmaceutical Equipment.
- Chemical Equipment.
- Sea Water Equipment.
- 热交换器。
- Condensers.
- 纸浆和造纸工业
- Off-Shore Oil Drilling Companies.
- Power Generation.
- Petrochemicals.
- Gas Processing.
- Specialty Chemicals.
- Pharmaceuticals.
