精密無縫鋼管是一種通過冷軋或冷拔處理后的高精密的鋼管;全稱：冷軋或冷拔精密無縫鋼管。由于精密無縫鋼管內外壁無氧化層、承受高壓無泄漏、高精度、高光潔度、冷彎不變形、擴口、壓扁無裂縫等優點，所以主要用來生產氣動或液壓 元件的產品，如氣缸或油缸，都是用無縫管。

　　精密(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)的(de)化(hua)學(xue)成分有碳C、硅Si、錳Mn、硫S、磷P、鉻Cr。厚壁無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)按照用(yong)(yong)(yong)(yong)途分為結構(gou)用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);輸送用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);鍋(guo)爐用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);鍋(guo)爐用(yong)(yong)(yong)(yong)高壓無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);化(hua)肥設備用(yong)(yong)(yong)(yong)高壓無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);地質磚(zhuan)探用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);石油(you)磚(zhuan)探用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);石油(you)裂(lie)化(hua)用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);船舶用(yong)(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);冷拔(ba)冷軋精密(mi)(mi)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan);各(ge)種(zhong)合金管(guan)(guan)(guan)。

　　按(an)照使用(yong)方法(fa)，無縫(feng)鋼管用(yong)鋼可分為四類(lei)：

　　1、制造機械零件(jian)和結構(gou)用鋼(gang)(gang)：這類包(bao)括低(di)碳素鋼(gang)(gang)、中碳素鋼(gang)(gang)、低(di)合(he)金鋼(gang)(gang)以(yi)及合(he)金鋼(gang)(gang)。

　　2、石油地質鉆探管用鋼(gang)：這類鋼(gang)包(解釋:鋼(gang)水包用于(yu)煉鋼(gang)廠進行(xing)澆注作(zuo)業(ye))括有中碳鋼(gang)、低合金(jin)鋼(gang)以及合金(jin)鋼(gang)。

　　3、制造各類工具用的碳素和合金工具鋼。

　　4、特(te)殊性能(neng)的鋼(gang)種(zhong)：不(bu)銹鋼(gang)不(bu)銹耐酸鋼(gang)、耐熱鋼(gang)、耐酸鋼(gang)、低溫用鋼(gang)以及其他有(you)特(te)殊性能(neng)要求的鋼(gang)種(zhong)。