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 |