童車專用(yong)管(guan)(guan)(guan)(guan)(guan)現場批發零售焊接鋼(gang)管(guan)(guan)(guan)(guan)(guan)，又稱(cheng)(cheng)焊管(guan)(guan)(guan)(guan)(guan)，是由(you)鋼(gang)板或(huo)帶鋼(gang)經卷邊(bian)成(cheng)型(xing)后制成(cheng)的鋼(gang)管(guan)(guan)(guan)(guan)(guan)，固定(ding)長(chang)度為(wei)6米(mi)(mi)。焊接鋼(gang)管(guan)(guan)(guan)(guan)(guan)生(sheng)(sheng)產工藝簡單，生(sheng)(sheng)產效(xiao)率高，品種規(gui)(gui)格多，設備投資少，但綜合強(qiang)度低(di)于(yu)無縫鋼(gang)管(guan)(guan)(guan)(guan)(guan)。普通焊管(guan)(guan)(guan)(guan)(guan)：一(yi)般焊管(guan)(guan)(guan)(guan)(guan)用(yong)于(yu)輸送(song)低(di)壓流體。它由(you)q195a、q215a和(he)Q235a鋼(gang)制成(cheng)。它也可以由(you)其他容(rong)易焊接的低(di)碳鋼(gang)制成(cheng)。鋼(gang)管(guan)(guan)(guan)(guan)(guan)應進行水壓、彎曲、壓扁等試驗(yan)。表(biao)面質量有一(yi)定(ding)的要(yao)求(qiu)。一(yi)般交(jiao)(jiao)貨長(chang)度為(wei)4-10米(mi)(mi)，通常需要(yao)固定(ding)長(chang)度(或(huo)多個長(chang)度)交(jiao)(jiao)貨。焊管(guan)(guan)(guan)(guan)(guan)規(gui)(gui)格用(yong)公稱(cheng)(cheng)直徑(mm或(huo)英寸)表(biao)示。公稱(cheng)(cheng)直徑與實(shi)際(ji)直徑不同。根據規(gui)(gui)定(ding)的壁(bi)厚，焊管(guan)(guan)(guan)(guan)(guan)有普通鋼(gang)管(guan)(guan)(guan)(guan)(guan)和(he)加厚鋼(gang)管(guan)(guan)(guan)(guan)(guan)兩種，按(an)管(guan)(guan)(guan)(guan)(guan)端形式分(fen)為(wei)有螺紋(wen)和(he)無螺紋(wen)兩種。
鍍(du)(du)(du)鋅(xin)鋼(gang)(gang)(gang)管(guan)(guan)：為提高鋼(gang)(gang)(gang)管(guan)(guan)的耐(nai)腐蝕(shi)性，一(yi)般(ban)鋼(gang)(gang)(gang)管(guan)(guan)(黑管(guan)(guan))采用鍍(du)(du)(du)鋅(xin)。鍍(du)(du)(du)鋅(xin)鋼(gang)(gang)(gang)管(guan)(guan)分為熱浸鍍(du)(du)(du)鋅(xin)和電鍍(du)(du)(du)鋅(xin)。熱鍍(du)(du)(du)鋅(xin)層厚，鍍(du)(du)(du)鋅(xin)成(cheng)本低。光亮焊管(guan)(guan)高頻(pin)焊管(guan)(guan)自(zi)行車(che)管(guan)(guan)嬰(ying)兒車(che)專用管(guan)(guan)現(xian)貨(huo)批發(fa)零售
