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 |