[Phase 1 of Time-Limited Quick Response Contest] 063 [Completed]

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Rules: 1. If you want to answer immediately, give a score of +1 wealth to Floor 1 and write your answer in the “Reason for action” field (only the content inside the parentheses); see the figure below for details. 2. One “*” represents 1 Chinese character (or 1 digit), and the answer must match exactly to be considered correct. 3. The first person to answer correctly will receive +10 wealth points; please reply in the replies on floor 2 or below to claim the reward ； 4. The scope of questions covers the commonly used standards and experience manuals for the process and piping fields ； 5. The difficulty level of the questions increases from easy to difficult. 6. Lower-grade students are welcome to participate actively. Question for this issue: 063. The pipeline grade of the valves and fittings at the openings of liquefied hydrocarbon storage tanks should not be lower than (***) MPa, and the gaskets used should be of type (*****). Standard answer: 2.0; Spiral-wound gasket. Winner: Wei Xiaobao. This post was last edited by hutom123 on March 28, 2009, at 20:08.]