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  隨著經濟的(de)不(bu)斷(duan)提高，管(guan)材(cai)產品的(de)使用不(bu)斷(duan)增多，下(xia)面ppr管生產(chan)廠家為大家介紹有關管材(cai)DN與De的參照表。

  管(guan)材(cai)的(de)(de)(de)直(zhi)(zhi)(zhi)徑可分(fen)(fen)為(wei)(wei)外(wai)徑、內徑、公(gong)(gong)稱直(zhi)(zhi)(zhi)徑。一(yi)般來說，管(guan)子的(de)(de)(de)直(zhi)(zhi)(zhi)徑可以分(fen)(fen)為(wei)(wei)外(wai)徑（De），內徑（D），公(gong)(gong)稱直(zhi)(zhi)(zhi)徑（DN）。管(guan)材(cai)為(wei)(wei)無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)的(de)(de)(de)管(guan)子的(de)(de)(de)外(wai)徑用(yong)(yong)字母D來表(biao)示(shi)，其(qi)后(hou)附加外(wai)直(zhi)(zhi)(zhi)徑的(de)(de)(de)尺(chi)寸和壁(bi)厚，例如(ru)(ru)外(wai)徑為(wei)(wei)108的(de)(de)(de)無(wu)縫(feng)(feng)鋼(gang)(gang)管(guan)，壁(bi)厚為(wei)(wei)5MM，用(yong)(yong)D108*5表(biao)示(shi)，塑料管(guan)也(ye)用(yong)(yong)外(wai)徑表(biao)示(shi)，如(ru)(ru)De63，其(qi)他如(ru)(ru)鋼(gang)(gang)筋(jin)混凝土管(guan)、鑄鐵管(guan)、鍍(du)鋅鋼(gang)(gang)管(guan)等采用(yong)(yong)DN表(biao)示(shi)，ppr管(guan)生產廠家在設計(ji)圖紙中一(yi)般采用(yong)(yong)公(gong)(gong)稱直(zhi)(zhi)(zhi)徑來表(biao)示(shi)，公(gong)(gong)稱直(zhi)(zhi)(zhi)徑是為(wei)(wei)了設計(ji)制造和維修的(de)(de)(de)方便人為(wei)(wei)地規(gui)定(ding)的(de)(de)(de)一(yi)種標(biao)準，也(ye)較(jiao)公(gong)(gong)稱通徑，是管(guan)子（或者(zhe)管(guan)件）的(de)(de)(de)規(gui)格(ge)名稱。
  管子(zi)的公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)和其(qi)內(nei)(nei)徑(jing)(jing)(jing)、外徑(jing)(jing)(jing)都不(bu)相(xiang)等(deng)，例如：公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)為100MM的無(wu)縫鋼管郵(you)102*5、108*5等(deng)好幾種(zhong)，108為管子(zi)的外徑(jing)(jing)(jing)，5表(biao)示(shi)管子(zi)的壁(bi)厚，因(yin)此(ci)，該(gai)鋼管的內(nei)(nei)徑(jing)(jing)(jing)為（108*5-5）＝98MM，但是它不(bu)完全等(deng)于(yu)(yu)鋼管外徑(jing)(jing)(jing)減兩倍壁(bi)厚之差，也可以(yi)(yi)說，公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)是接近于(yu)(yu)內(nei)(nei)徑(jing)(jing)(jing)，但是又不(bu)等(deng)于(yu)(yu)內(nei)(nei)徑(jing)(jing)(jing)的一種(zhong)管子(zi)直(zhi)徑(jing)(jing)(jing)的規格(ge)名稱(cheng)，在設計圖紙中(zhong)所以(yi)(yi)要用公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)，目(mu)的是為了根(gen)據公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)可以(yi)(yi)確定管子(zi)、管件、閥(fa)門(men)、法(fa)蘭、墊(dian)片等(deng)結構尺寸與連接尺寸，公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)采用符號DN表(biao)示(shi)，如果ppr管生產廠家在設計圖紙中(zhong)采用外徑(jing)(jing)(jing)表(biao)示(shi)，也應(ying)該(gai)作出管道(dao)規格(ge)對照表(biao)，表(biao)明(ming)某種(zhong)管道(dao)的公(gong)(gong)(gong)稱(cheng)直(zhi)徑(jing)(jing)(jing)，壁(bi)厚。
  以上(shang)是ppr管(guan)(guan)生產廠家分享有關管(guan)(guan)材(cai)DN與De的參照(zhao)表(biao)的相關知識(shi)，如(ru)果想了解更多相關知識(shi)，請(qing)關注本(ben)網站。希(xi)望小編(bian)的分享能幫(bang)助到(dao)大家。