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2019-09-01View Original

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Reply #22019-09-01

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Reply #32019-09-02

"Einige Fragen zu den Metkstoffvererhitzungspuffern für HGGH699699 9",

Reply #42019-09-02

"RT：（G）HGGH69696规定了金属包覆垫的使用范围PN N~PN63，也就是说如果如果选择金属包覆垫片，法兰的公称压力至少应该是PN63的，低于此公称压力的的法兰是不能选择此类垫片，而GB/TG5669的金属包覆垫片的使用范围是PN5~PN63，同时HGGH69699的规范性引用文件里面有GBT56611的也就是说HGGH69699实际上是参考了GB/T56611的一些内容但是为什么两个标准对PN系列管法兰在使用金属包覆垫片的配套法兰的公称压力适用范围有这样的差别？？？

Reply #52019-09-02

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