冷鍍鋅無縫鋼管相信很多人都見過，那么大家是否了解冷鍍鋅無縫鋼管的標準都有哪些嗎?下(xia)面詳細為大家介紹：

　　一(yi)般來說，管(guan)(guan)(guan)(guan)(guan)子(zi)的(de)(de)(de)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)可分為(wei)(wei)外(wai)(wai)徑(jing)(jing)(jing)(jing)、內(nei)徑(jing)(jing)(jing)(jing)、公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)。管(guan)(guan)(guan)(guan)(guan)材為(wei)(wei)無縫鋼(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)管(guan)(guan)(guan)(guan)(guan)子(zi)的(de)(de)(de)外(wai)(wai)徑(jing)(jing)(jing)(jing)用(yong)字母D來表示(shi)，其后附加外(wai)(wai)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)的(de)(de)(de)尺(chi)寸和(he)壁(bi)厚，例如(ru)外(wai)(wai)徑(jing)(jing)(jing)(jing)為(wei)(wei)108的(de)(de)(de)無縫鋼(gang)管(guan)(guan)(guan)(guan)(guan)，壁(bi)厚為(wei)(wei)5MM，用(yong)D108*5表示(shi)，塑(su)料管(guan)(guan)(guan)(guan)(guan)也(ye)(ye)用(yong)外(wai)(wai)徑(jing)(jing)(jing)(jing)表示(shi)，如(ru)De63,其他(ta)如(ru)鋼(gang)筋混凝土管(guan)(guan)(guan)(guan)(guan)、鑄鐵管(guan)(guan)(guan)(guan)(guan)、鍍(du)鋅鋼(gang)管(guan)(guan)(guan)(guan)(guan)等(deng)(deng)采用(yong)DN表示(shi)，在設(she)(she)(she)計(ji)圖紙(zhi)中(zhong)一(yi)般采用(yong)公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)來表示(shi)，公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)是(shi)(shi)(shi)為(wei)(wei)了設(she)(she)(she)計(ji)制造和(he)維修的(de)(de)(de)方便(bian)人(ren)為(wei)(wei)地規(gui)定的(de)(de)(de)一(yi)種(zhong)標準，也(ye)(ye)較公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)通徑(jing)(jing)(jing)(jing)，是(shi)(shi)(shi)管(guan)(guan)(guan)(guan)(guan)子(zi)(或者管(guan)(guan)(guan)(guan)(guan)件(jian))的(de)(de)(de)規(gui)格名(ming)稱(cheng)(cheng)(cheng)。管(guan)(guan)(guan)(guan)(guan)子(zi)的(de)(de)(de)公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)和(he)其內(nei)徑(jing)(jing)(jing)(jing)、外(wai)(wai)徑(jing)(jing)(jing)(jing)都不相等(deng)(deng)，例如(ru)：公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)為(wei)(wei)100MM的(de)(de)(de)無縫鋼(gang)管(guan)(guan)(guan)(guan)(guan)郵102*5、108*5等(deng)(deng)好幾種(zhong)，108為(wei)(wei)管(guan)(guan)(guan)(guan)(guan)子(zi)的(de)(de)(de)外(wai)(wai)徑(jing)(jing)(jing)(jing)，5表示(shi)管(guan)(guan)(guan)(guan)(guan)子(zi)的(de)(de)(de)壁(bi)厚，因此(ci)，該(gai)鋼(gang)管(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)內(nei)徑(jing)(jing)(jing)(jing)為(wei)(wei)(108*5-5)=98MM，但(dan)是(shi)(shi)(shi)它不完(wan)全等(deng)(deng)于(yu)鋼(gang)管(guan)(guan)(guan)(guan)(guan)外(wai)(wai)徑(jing)(jing)(jing)(jing)減兩倍(bei)壁(bi)厚之差(cha)，也(ye)(ye)可以說，公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)是(shi)(shi)(shi)接(jie)近(jin)于(yu)內(nei)徑(jing)(jing)(jing)(jing)，但(dan)是(shi)(shi)(shi)又不等(deng)(deng)于(yu)內(nei)徑(jing)(jing)(jing)(jing)的(de)(de)(de)一(yi)種(zhong)管(guan)(guan)(guan)(guan)(guan)子(zi)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)的(de)(de)(de)規(gui)格名(ming)稱(cheng)(cheng)(cheng)，在設(she)(she)(she)計(ji)圖紙(zhi)中(zhong)所以要用(yong)公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)，目的(de)(de)(de)是(shi)(shi)(shi)為(wei)(wei)了根據公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)可以確定管(guan)(guan)(guan)(guan)(guan)子(zi)、管(guan)(guan)(guan)(guan)(guan)件(jian)、閥門、法蘭、墊片等(deng)(deng)結構尺(chi)寸與(yu)連接(jie)尺(chi)寸，公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)采用(yong)符(fu)號DN表示(shi)，如(ru)果在設(she)(she)(she)計(ji)圖紙(zhi)中(zhong)采用(yong)外(wai)(wai)徑(jing)(jing)(jing)(jing)表示(shi)，也(ye)(ye)應該(gai)作出管(guan)(guan)(guan)(guan)(guan)道規(gui)格對照表，表明某種(zhong)管(guan)(guan)(guan)(guan)(guan)道的(de)(de)(de)公(gong)(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)直(zhi)(zhi)(zhi)徑(jing)(jing)(jing)(jing)，壁(bi)厚。