20#大口徑厚壁鋼管廠家-20#大口徑厚壁鋼管現貨-20#大口徑厚壁鋼管規格

　　20#大口徑厚壁鋼管切割零售價

　　由整塊金(jin)屬制成的，表(biao)面上沒有(you)(you)接縫(feng)(feng)的鋼管(guan)(guan)(guan)，稱為(wei)無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)。根據生產方法，無(wu)縫(feng)(feng)管(guan)(guan)(guan)分熱(re)軋(ya)管(guan)(guan)(guan)、冷(leng)軋(ya)管(guan)(guan)(guan)、冷(leng)拔(ba)管(guan)(guan)(guan)、擠壓管(guan)(guan)(guan)、頂管(guan)(guan)(guan)等。按照斷(duan)面形(xing)(xing)(xing)(xing)(xing)狀，無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)分圓(yuan)形(xing)(xing)(xing)(xing)(xing)和異(yi)形(xing)(xing)(xing)(xing)(xing)兩種(zhong)，異(yi)形(xing)(xing)(xing)(xing)(xing)管(guan)(guan)(guan)有(you)(you)方形(xing)(xing)(xing)(xing)(xing)、橢圓(yuan)形(xing)(xing)(xing)(xing)(xing)、三角(jiao)形(xing)(xing)(xing)(xing)(xing)、六角(jiao)形(xing)(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)(xing)、 帶翅管(guan)(guan)(guan)多種(zhong)復雜形(xing)(xing)(xing)(xing)(xing)狀。最大直徑達650mm，最小直徑為(wei) 0.3mm。根據用(yong)途不同， 有(you)(you)厚壁管(guan)(guan)(guan)和薄壁管(guan)(guan)(guan)。無(wu)縫(feng)(feng)鋼管(guan)(guan)(guan)主要用(yong)做(zuo)石(shi)油(you)地質鉆探(tan)管(guan)(guan)(guan)、石(shi)油(you)化工用(yong)的裂化管(guan)(guan)(guan)、鍋 爐管(guan)(guan)(guan)、軸(zhou)承管(guan)(guan)(guan)以及汽車、拖拉機(ji)、航空用(yong)高精度(du)結(jie)構鋼管(guan)(guan)(guan)。

　　沿其橫(heng)截(jie)面的周邊上無(wu)接縫的鋼(gang)管(guan)(guan)。根據(ju)生產方法不同分(fen)為(wei)熱軋管(guan)(guan)、冷軋管(guan)(guan)、冷拔管(guan)(guan)、擠壓管(guan)(guan)、頂管(guan)(guan)等，均有各自工藝規定。材質(zhi)有普通(tong)和優質(zhi)碳素結(jie)構鋼(gang)(Q215-A～Q275-A和10～50號鋼(gang))、低合金鋼(gang)(09MnV、16Mn等)、合金鋼(gang)、不銹耐酸鋼(gang)等。按用(yong)(yong)(yong)途(tu)分(fen)為(wei)一(yi)般(ban)用(yong)(yong)(yong)途(tu)的(用(yong)(yong)(yong)于(yu)輸水、氣(qi)管(guan)(guan)道和結(jie)構件、機械零件)和專用(yong)(yong)(yong)的(用(yong)(yong)(yong)于(yu)鍋爐、地質(zhi)勘探、軸承、耐酸等)兩類。

　　大口徑厚壁無縫鋼管用(yong)(yong)(yong)(yong)(yong)途很廣泛。一般用(yong)(yong)(yong)(yong)(yong)途的無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)由普通(tong)的碳素結構(gou)鋼(gang)(gang)、低合金(jin)結構(gou)鋼(gang)(gang)或合金(jin)結構(gou)鋼(gang)(gang)軋制，產量最多，主要(yao)用(yong)(yong)(yong)(yong)(yong)作輸送流(liu)體(ti)的管(guan)(guan)(guan)道(dao)或結構(gou)零件。.2、根據(ju)用(yong)(yong)(yong)(yong)(yong)途不同分三(san)類(lei)供(gong)(gong)(gong)(gong)應(ying)：a、按化學成分和機械性(xing)能(neng)供(gong)(gong)(gong)(gong)應(ying);b、按機械性(xing)能(neng)供(gong)(gong)(gong)(gong)應(ying);c、按水壓(ya)試驗(yan)供(gong)(gong)(gong)(gong)應(ying)。按a、b類(lei)供(gong)(gong)(gong)(gong)應(ying)的鋼(gang)(gang)管(guan)(guan)(guan)，如用(yong)(yong)(yong)(yong)(yong)于承受液體(ti)壓(ya)力，也(ye)要(yao)進行水壓(ya)試驗(yan)。3、專門用(yong)(yong)(yong)(yong)(yong)途的無(wu)(wu)縫(feng)管(guan)(guan)(guan)有(you)鍋爐(lu)用(yong)(yong)(yong)(yong)(yong)無(wu)(wu)縫(feng)管(guan)(guan)(guan)、化工(gong)電(dian)力用(yong)(yong)(yong)(yong)(yong)，地質用(yong)(yong)(yong)(yong)(yong)無(wu)(wu)縫(feng)鋼(gang)(gang)管(guan)(guan)(guan)及石油用(yong)(yong)(yong)(yong)(yong)無(wu)(wu)縫(feng)管(guan)(guan)(guan)等多種。

　　無縫鋼(gang)管具有中空(kong)截面，大量用作輸送(song)流體的管道，如輸送(song)石油(you)、天然氣、煤氣、水及某些固(gu)體物料的管道等。無縫鋼(gang)管與圓鋼(gang)等實心(xin)鋼(gang)材(cai)相(xiang)比，在抗彎抗扭強度相(xiang)同時，重量較輕，是一種(zhong)經(jing)濟(ji)截面鋼(gang)材(cai)。

　　廣(guang)(guang)泛用(yong)于制造(zao)結構件和機械零件，如石油鉆桿、汽車傳動軸、自(zi)行車架以及(ji)建筑施工(gong)(gong)中用(yong)的鋼腳手架等(deng)用(yong)鋼管制造(zao)環(huan)形零件，可提高材(cai)料(liao)利用(yong)率(lv)，簡化制造(zao)工(gong)(gong)序，節約材(cai)料(liao)和加工(gong)(gong)工(gong)(gong)時，已廣(guang)(guang)泛用(yong)鋼管來制造(zao)。

　　①熱軋無縫鋼管主要生產工序(xu)(xu)(△主要檢(jian)驗工序(xu)(xu))：

　　管(guan)(guan)坯準備及檢查△→管(guan)(guan)坯加熱(re)→穿(chuan)孔→軋(ya)管(guan)(guan)→鋼管(guan)(guan)再加熱(re)→定(減)徑(jing)→熱(re)處理(li)△→成品管(guan)(guan)矯直→精(jing)整→檢驗△(無損、理(li)化、臺檢) →入庫

　　②冷(leng)軋(拔)無縫鋼管主要生產(chan)工序(xu)：

　　坯料(liao)準(zhun)備→酸洗潤(run)滑→冷軋(拔)→熱處理→矯(jiao)直→精整→檢驗(yan)