而民(min)營企(qi)(qi)業對市(shi)(shi)場(chang)(chang)(chang)更(geng)加。“該不該上(shang)馬項(xiang)目(mu)(mu)，上(shang)多大(da)(da)的(de)項(xiang)目(mu)(mu)；如(ru)果虧損該不該停工(gong)，停工(gong)的(de)話停多少(shao)。中小型民(min)企(qi)(qi)在考慮這些問題時(shi)，更(geng)加尊重市(shi)(shi)場(chang)(chang)(chang)規律，不會做(zuo)違背市(shi)(shi)場(chang)(chang)(chang)的(de)事(shi)(shi)情(qing)，因為(wei)(wei)事(shi)(shi)關投資(zi)者(zhe)的(de)錢袋子。”前述山東某民(min)營鋼(gang)企(qi)(qi)的(de)中層說。 淺談目(mu)(mu)前天津(jin)大(da)(da)邱(qiu)莊方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠市(shi)(shi)場(chang)(chang)(chang)面(mian)(mian)臨的(de)困(kun)境進入(ru)4月(yue)份(fen)，稅改已(yi)塵埃(ai)落定，3月(yue)底積壓的(de)下(xia)游需求也(ye)陸續釋放(fang)(fang)，加上(shang)近(jin)日(ri)期鋼(gang)強勢(shi)上(shang)行，帶動方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)現(xian)貨市(shi)(shi)場(chang)(chang)(chang)迎來(lai)一(yi)(yi)波上(shang)漲行情(qing)。盡管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)螺紋鋼(gang)等(deng)相關品種走(zou)高，但是(shi)(shi)大(da)(da)邱(qiu)莊方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)價格依舊波瀾(lan)不驚，市(shi)(shi)場(chang)(chang)(chang)也(ye)仍是(shi)(shi)不溫不火。 究其緣由，主要還是(shi)(shi)目(mu)(mu)前天津(jin)大(da)(da)邱(qiu)莊方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)市(shi)(shi)場(chang)(chang)(chang)處于以下(xia)困(kun)境：今(jin)年(nian)以來(lai)天津(jin)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)市(shi)(shi)場(chang)(chang)(chang)與唐山市(shi)(shi)場(chang)(chang)(chang)差價一(yi)(yi)直(zhi)(zhi)處于200-300元/噸之間，南北(bei)差價一(yi)(yi)直(zhi)(zhi)偏低(di)，1-2月(yue)房屋新(xin)開工(gong)面(mian)(mian)積18814萬平方(fang)(fang)(fang)(fang)米，同(tong)比增(zeng)長6.0%，增(zeng)速(su)回(hui)落11.2個(ge)百(bai)分(fen)(fen)(fen)點；而3月(yue)份(fen)工(gong)程機械(xie)市(shi)(shi)場(chang)(chang)(chang)指數即CMI為(wei)(wei)141.95，同(tong)比降低(di)11.01%。 各(ge)項(xiang)數據顯示2019年(nian)一(yi)(yi)季度下(xia)業用鋼(gang)需求并未完全恢復(fu)，整體(ti)(ti)較為(wei)(wei)一(yi)(yi)般(ban)。體(ti)(ti)現(xian)在天津(jin)大(da)(da)邱(qiu)莊方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)市(shi)(shi)場(chang)(chang)(chang)成交方(fang)(fang)(fang)(fang)面(mian)(mian)也(ye)很(hen)明顯，據廣東型鋼(gang)商(shang)家(jia)反饋，3月(yue)份(fen)市(shi)(shi)場(chang)(chang)(chang)出(chu)貨一(yi)(yi)直(zhi)(zhi)未有放(fang)(fang)量(liang)，出(chu)貨量(liang)僅為(wei)(wei)正(zheng)常水平的(de)50%-70%之間。天津(jin)大(da)(da)邱(qiu)莊方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)成交難以放(fang)(fang)量(liang)，對價格上(shang)漲形(xing)(xing)成較大(da)(da)阻力。 淺談方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)的(de)多種方(fang)(fang)(fang)(fang)法都是(shi)(shi)什(shen)么。方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)方(fang)(fang)(fang)(fang)法有很(hen)多，可(ke)以按(an)(an)材(cai)質、工(gong)藝(yi)、口徑、形(xing)(xing)狀、用途等(deng)多個(ge)方(fang)(fang)(fang)(fang)面(mian)(mian)劃分(fen)(fen)(fen)，下(xia)面(mian)(mian)為(wei)(wei)大(da)(da)家(jia)總結一(yi)(yi)下(xia)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)是(shi)(shi)怎么分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)的(de)。方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)生(sheng)產工(gong)藝(yi)分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)生(sheng)產工(gong)藝(yi)分(fen)(fen)(fen)：熱軋無(wu)縫(feng)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、冷拔無(wu)縫(feng)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、無(wu)縫(feng)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、焊(han)(han)(han)接(jie)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。 其中鍍鋅方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)又(you)分(fen)(fen)(fen)為(wei)(wei)：(a)按(an)(an)工(gong)藝(yi)分(fen)(fen)(fen)——電弧焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、電阻焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(高頻、低(di)頻)、氣焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、爐焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(b)按(an)(an)焊(han)(han)(han)縫(feng)分(fen)(fen)(fen)——直(zhi)(zhi)縫(feng)焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、螺旋焊(han)(han)(han)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)材(cai)質分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)材(cai)質分(fen)(fen)(fen)：普碳鋼(gang)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、低(di)合金方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。普碳鋼(gang)分(fen)(fen)(fen)為(wei)(wei)：Q195、Q215、Q235、SS400、20#鋼(gang)、45#鋼(gang)等(deng)；低(di)合金鋼(gang)分(fen)(fen)(fen)為(wei)(wei)Q345、16Mn、Q390、ST52-3等(deng)。 方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)斷(duan)(duan)(duan)面(mian)(mian)形(xing)(xing)狀分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)斷(duan)(duan)(duan)面(mian)(mian)形(xing)(xing)狀分(fen)(fen)(fen)類(lei)(lei)(lei)(lei)：(1)簡單斷(duan)(duan)(duan)面(mian)(mian)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)——方(fang)(fang)(fang)(fang)形(xing)(xing)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、矩形(xing)(xing)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(2)復(fu)雜斷(duan)(duan)(duan)面(mian)(mian)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)——花(hua)形(xing)(xing)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、開口形(xing)(xing)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、波紋形(xing)(xing)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、異型方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)按(an)(an)表面(mian)(mian)處理分(fen)(fen)(fen)：熱鍍鋅方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、電鍍鋅方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、涂(tu)油方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)、酸洗方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)方(fang)(fang)(fang)(fang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)用途。