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发表于 2009-2-24 13:59
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来自: 中国上海
1. steel,titanium,composites
2. relatively, because it is too long, always taken as flexible.
3.the pressures are different in different categories
the following categories of risers are typically used for exploitation of hydrocarbons:
-production riser
-injection riser
-gas lift riser
-service riser
-export/import riser
-completion/workover riser
-marine drilling riser system
-subsea control umbilical
-integrated production umbilical
an example in dnv code, the workin pressure of a Drilling riser is:1034bar (15000 psi)
4 The maximum diameter I have read is: 38 inch (965 mm) diameter marine riser |
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