[Phase 1 of Time-Limited Quick Response Contest] 029 [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 within parentheses); see the image 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 and below to claim the reward ； 4. The scope of questions covers the commonly used standards and experience manuals in the fields of process engineering and piping ； 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: 029. For pipes with a design temperature of (***)°C or lower and a nominal pressure of less than or equal to (***) MPa, flat welding flanges should be used ； For pipes with a design temperature greater than (***) °C or a nominal pressure of greater than or equal to (***) MPa, butt-weld flanges should be used. Standard answer: 300 ； 2.5 ； 300 ； 4.0 Winner: savefaith2008 This post was last edited by hutom123 on 2009-3-25 09:52]
For pipes with a design temperature of 300°C or lower and a nominal pressure of 2.5 MPa or less, flat welding flanges should be used； For pipes with a design temperature greater than (300)°C or a nominal pressure of 4.0 MPa or higher, butt-weld flanges should be used.
300； 2.5 ； 300 ； 4.0
For pipes with a design temperature of 300°C or lower and a nominal pressure of 2.5 MPa or less, flat welding flanges should be used； For pipes with a design temperature greater than (300)°C or a nominal pressure of 4.0 MPa or higher, butt-weld flanges should be used.