tank vessel cassion的区别? got the following from another forum: the primary difference between the two terms is the design ... actually, tank may also be designed to operate under pressure, http:///dep/rpp/brp/dp/downloads/dphs_tank_testing_guide_2010.pdf field-erected steel aboveground storage tanks operated under pressure field-erected steel aboveground storage tanks operated under pressure must follow api 510, “pressure vessel inspection code: in-service inspection, rating, repair, and alteration”. this includes tanks containing liquids as well as tanks containing gases that are hazardous substances including, but not limited to, anhydrous ammonia and chlorine. api 510 is a maintenance inspection, rating, repair and alteration standard for pressure vessels. it is applicable to vessels constructed and maintained in accordance with asme section viii or other recognized pressure vessel codes. facilities following the api 510 inspection standard must follow all aspects of the current edition of the code. this includes, but is not limited to, maintenance, repair, alteration and inspection of these tanks and, a tank operated under pressure do not necessarily have flat bottom http:///subs/tech/tech01.html#pressure ballast this is a topic about the mechanism of floating & diving of submarines, which involves the use of "tank", of course, that is unrelated to chemical engineering, just for fun 查看更多