应用化学每日一题8-21

2017-08-21View Original

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应用化学相关知识，包括（分析化学，物理化学，化工原理,CAD制图），特此推出（每日一题）活动，回复即可查看。为鼓励大家持续的参与！回复即有3财富奖励！答对5点财富！希望大家积极参与，共同学*，共同进步！！！ DN80 SCH20 公称壁厚多少？ 4.5

Reply #22017-08-21

SCH20是代表一种壁厚等级，不同公称通径的同一等级的壁厚不同的。在ANSI/ASME B36.10M（19M）中8英寸以下的无SCH20等级之分，大于等于8英寸的对壁厚才有规定例：8英寸的SCH20的壁厚为0.250英寸而GB12459中DN50及以上管路才有SCH20的相关壁厚规定。例：DN50的SCH20的壁厚为3.2毫米

Reply #32017-08-21

没有该尺寸该等级的管道！

Reply #42017-08-21

标准中没有sch20, 如果插值的话应该是3.58-3.96之间.参考标准ASME B36.10

Reply #52017-08-21

4㎜（SH3406中没有具体的要求）

Reply #62017-08-21

DN80 SCH20的壁厚是4.5mm

Reply #72017-08-21

dn80管标号sch20管壁厚4.5

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应用化学每日一题8-21

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