不(bu)銹鋼管(guan)(guan)(guan)件在管(guan)(guan)(guan)系中(zhong)(zhong)起著改變(bian)走向、改變(bian)標高或改變(bian)直徑、封閉管(guan)(guan)(guan)端(duan)以及(ji)由(you)主(zhu)管(guan)(guan)(guan)上(shang)引(yin)出支管(guan)(guan)(guan)的(de)作用(yong)。在石油化(hua)工裝(zhuang)置中(zhong)(zhong)管(guan)(guan)(guan)道品(pin)種多(duo),管(guan)(guan)(guan)系復雜、形狀(zhuang)各異、簡(jian)繁(fan)不(bu)等,所用(yong)的(de)管(guan)(guan)(guan)件品(pin)種、材質、數量也就很(hen)多(duo),選用(yong)時需要考慮的(de)因素也很(hen)復雜。
非金屬管件和襯里管件的標準化程度不如不銹鋼管件高,使用時要注意各制造廠在制造工藝、規格尺寸、各種性能等方面的差異。本節主要介紹鋼制(zhi)管件,需要選用非金屬管件和襯里管件時可從有關的標準規范中查找。
管件的用途見表4-25。
根據管(guan)(guan)(guan)件(jian)端(duan)部連接形式(shi)可(ke)將管(guan)(guan)(guan)件(jian)分為對焊(han)連接管(guan)(guan)(guan)件(jian)(簡稱(cheng)對焊(han)管(guan)(guan)(guan)件(jian))、承插(cha)焊(han)連接管(guan)(guan)(guan)件(jian)(簡稱(cheng)承插(cha)焊(han)管(guan)(guan)(guan)件(jian))、螺紋連接管(guan)(guan)(guan)件(jian)(簡稱(cheng)螺紋管(guan)(guan)(guan)件(jian))、法蘭(lan)連接管(guan)(guan)(guan)件(jian)以及其他管(guan)(guan)(guan)件(jian)。
壓力管(guan)(guan)(guan)道設計中,常用(yong)對(dui)焊管(guan)(guan)(guan)件(jian)、支(zhi)管(guan)(guan)(guan)臺、承插焊及螺紋連(lian)接管(guan)(guan)(guan)件(jian)的(de)形式。法(fa)蘭(lan)(lan)管(guan)(guan)(guan)件(jian)多用(yong)于特(te)殊(shu)場合(he),使用(yong)范(fan)圍及數量相(xiang)對(dui)比較少。需(xu)要時可根據《鋼制法(fa)蘭(lan)(lan)管(guan)(guan)(guan)件(jian)》(GB/T17185)的(de)規定選用(yong)。