化(hua)工(gong)鋼制(zhi)(zhi)無縫(feng)(feng)對焊(han)管(guan)(guan)(guan)件(jian)(jian)是以碳(tan)鋼、低合金鋼材料或(huo)無縫(feng)(feng)鋼管(guan)(guan)(guan)制(zhi)(zhi)造(zao)的無縫(feng)(feng)管(guan)(guan)(guan)件(jian)(jian),管(guan)(guan)(guan)件(jian)(jian)與管(guan)(guan)(guan)子的連接采用(yong)對焊(han)式。管(guan)(guan)(guan)件(jian)(jian)的品(pin)種(zhong)包括三通(等(deng)徑(jing)(jing)與異(yi)徑(jing)(jing))、90°彎頭(長(chang)半徑(jing)(jing)與短半徑(jing)(jing))、異(yi)徑(jing)(jing)管(guan)(guan)(guan)或(huo)異(yi)徑(jing)(jing)接頭(同(tong)心(xin)(xin)與偏(pian)心(xin)(xin))和管(guan)(guan)(guan)帽4種(zhong),尺寸分公(gong)制(zhi)(zhi)和英制(zhi)(zhi)兩個系列。此種(zhong)管(guan)(guan)(guan)件(jian)(jian)主要用(yong)于化(hua)工(gong)及石油化(hua)工(gong)企業(ye)。


1. 印記內容


  管件在(zai)包裝前應打印記(ji)作標(biao)志,印記(ji)應包括(kuo)以下內(nei)容:


   a. 公稱直(zhi)徑;


   b. 公(gong)稱壓力或管標號;


   c. 材料(liao):以鋼(gang)號(hao)表示,如(ru)20、15CrMo、16Mn;


   d. 制造(zao)廠代號(hao)或商(shang)標(打在上述各(ge)項之后)。


2. 印記示例


   三通(tong)(或異徑(jing)管(guan))公(gong)(gong)稱(cheng)直徑(jing)100mm×80 mm,公(gong)(gong)稱(cheng)壓力(li)2.5 MPa(25 bar),材(cai)料15CrMo,則三通(tong)(或異徑(jing)管(guan))的印記為:100×80-25-15CrMo


   英制(zhi)90°長半徑彎頭(tou)(tou)公(gong)稱直徑6in,管(guan)標號(hao)40,材(cai)料20號(hao)鋼,則英制(zhi)90°長半徑彎頭(tou)(tou)印記為6-Sch40-20-90L;英制(zhi)90°短半徑彎頭(tou)(tou)印記為:6-Sch40-20-90S


   管(guan)帽(mao)(mao)公(gong)稱直徑100mm,公(gong)稱壓力4.0 MPa(40bar),材(cai)料(liao)20號鋼,則管(guan)帽(mao)(mao)印記為(wei):100-40-20。


3. 印記位置(zhi)


   印記的位(wei)置(zhi)見圖(tu)(tu)15-9(圖(tu)(tu)中虛線位(wei)置(zhi))


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