某熱水管(guan)線(xian)墊(dian)片(pian)(pian)設計(ji)時(shi),選用(yong)的是非金(jin)屬墊(dian)片(pian)(pian)(ethylene-propylene-dienetripolymer,EPDM),EPDM中文(wen)名稱(cheng):乙(yi)烯(xi)-丙烯(xi)-環(huan)戊二烯(xi)三元共(gong)聚(ju)物(wu)(三元乙(yi)丙橡膠)),共(gong)計(ji)118片(pian)(pian)。后來,在施工(gong)階段,考慮到如果運行時(shi)熱水管(guan)道出現問題,需要停車檢修,影響較大(da),決定(ding)更換(huan)墊(dian)片(pian)(pian)為石(shi)墨復合墊(dian),更換(huan)后材料柔性石(shi)墨復合墊(dian)片(pian)(pian) HG/T 20627 304S.S/GRAP.PN2.0MPa RF 1.5 mm。




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