| physical property物理特性 |
| pipe property | unit | value | standard |
| heat conduction coefficient热传导系数 | btu.in/(hr.ft2.℉) | 2.3 | hvtm |
| w/m.℃ | 0.33 | hvtm |
| heat expansion coefficient热膨胀系数 | 10ˉ6in/in/℉ | 8.7 | astm d696 |
| 10ˉ6mm/mm/℃ | 15.7 | astm d696 |
| flow coefficient流量系数 | hazen williams | 150 | hvtm |
| absolute roughness绝对粗糙度 | 10ˉ6 in | 60 | hvtm |
| 10ˉ6 m | 1.5 | hvtm |
| density密度 | ib/in3 | 0.073 | astm d792 |
| g/cm3 | 1.93 | astm d792 |
| toroidal elastic modulus环向弹性系数 | gpa | 22.8 | astm d2105 |
| axial elastic modulus轴向弹性系数 | gpa | 13.8 | astm d2105 |
| hoop poisson’s ratio环性泊松比 | - | 0.4 | astm d2105 |
| amine tg | ℃ | ≥145 | api |
| safety coefficient（ high pressure）安全系数（高压） | mpa | 2 times of working pressure）工作压力的2倍 | api 15hr |
| safety coefficient（low pressure）安全系数（低压） | mpa | 3 times of working pressure）工作压力的3倍 | api 15lr |
product manual: