天津闊恒興旺國際(ji)貿易有限公(gong)司

鍍(du)鋅C型(xing)鋼是(shi)指(zhi)采用(yong)高(gao)強度(du)(du)鋼板，經過冷彎，輥壓成型(xing)，具有壁厚均(jun)勻、截面性能優良，強度(du)(du)高(gao)，與傳統熱(re)軋相比(bi)同等強度(du)(du)可節約材料(liao)30%一種新型(xing)鋼材。

鍍鋅(xin)C型(xing)(xing)鋼規格(ge)尺寸可調、抗壓強度大等優點。通過冷彎成(cheng)型(xing)(xing)的型(xing)(xing)鋼，其(qi)斷面尺寸雖然輕(qing)巧，卻(que)極符合屋(wu)面檁條的受力特點，使(shi)鋼材的力學效能(neng)得到光分發揮利用(yong)(yong)。多種配件可連接成(cheng)不同的組(zu)合方式，外型(xing)(xing)美觀，使(shi)用(yong)(yong)型(xing)(xing)鋼檁條，可減輕(qing)建(jian)筑屋(wu)面重量(liang)(liang)，減少(shao)工(gong)程用(yong)(yong)鋼量(liang)(liang)，因而被(bei)稱為經濟鋼材，是替(ti)代角(jiao)鋼、槽鋼、鋼管等傳統鋼檁條的新型(xing)(xing)建(jian)筑材料(liao)。鍍鋅(xin)C型(xing)(xing)鋼廣泛用(yong)(yong)于鋼結構(gou)建(jian)筑的檁條、墻梁(liang)，也(ye)可自行組(zu)合成(cheng)輕(qing)量(liang)(liang)型(xing)(xing)屋(wu)架(jia)、托(tuo)架(jia)等建(jian)筑構(gou)件。此外，還(huan)可用(yong)(yong)于機械輕(qing)工(gong)制造中的柱、梁(liang)和(he)臂等。

哈中二(er)期輸油瞥道(dao)，在(zai)閥(fa)室(shi)安裝鍍鋅(xin)圓鋼及扁鋼作(zuo)為接(jie)地(di)(di)網并與截斷閥(fa)連接(jie)。實際測量(liang)(liang)管(guan)道(dao)電(dian)(dian)(dian)位(wei)為-1 05V CSE（管(guan)道(dao)沿(yan)線有2支鎂(mei)陽極，電(dian)(dian)(dian)位(wei)-1 ssv CSE），外(wai)加電(dian)(dian)(dian)流陰極保(bao)護投用后，30#陰保(bao)站閥(fa)室(shi)處．通電(dian)(dian)(dian)電(dian)(dian)(dian)位(wei)l.195V CSE;距離陰保(bao)站24公里處3l#閥(fa)室(shi)，通電(dian)(dian)(dian)電(dian)(dian)(dian)位(wei)1 129 V CSE，從電(dian)(dian)(dian)位(wei)曲線可以看出，由于閥(fa)室(shi)接(jie)地(di)(di)，該處的電(dian)(dian)(dian)位(wei)值仍然正，但它對兩側的陰極保(bao)護電(dian)(dian)(dian)位(wei)影響不是很大(da)，當然，只有通過測量(liang)(liang)斷電(dian)(dian)(dian)電(dian)(dian)(dian)位(wei)才能終(zhong)確定(ding)保(bao)護是否充分。

在哈(ha)中輸油管(guan)(guan)(guan)道(dao)(dao)一期，沿線閥(fa)(fa)室(shi)(shi)采用石墨接(jie)(jie)地(di)模(mo)塊(kuai)。在36#閩室(shi)(shi)管(guan)(guan)(guan)道(dao)(dao)和接(jie)(jie)地(di)網短(duan)(duan)路(lu)(lu)，該閥(fa)(fa)室(shi)(shi)裝有(you)恒電(dian)(dian)(dian)(dian)位(wei)(wei)儀(yi)，輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)：6 0V，電(dian)(dian)(dian)(dian)流2 0A，通(tong)電(dian)(dian)(dian)(dian)點電(dian)(dian)(dian)(dian)位(wei)(wei)-0. 94V CSE: 36公(gong)里處(chu)閥(fa)(fa)室(shi)(shi), -1.64V;50公(gong)里處(chu)閥(fa)(fa)室(shi)(shi)-1. 42V。將短(duan)(duan)路(lu)(lu)排(pai)除后(hou)(hou)，恒電(dian)(dian)(dian)(dian)位(wei)(wei)儀(yi)輸出(chu)電(dian)(dian)(dian)(dian)壓(ya)：3.19V，輸出(chu)電(dian)(dian)(dian)(dian)流：0 76A，50公(gong)里處(chu)閥(fa)(fa)室(shi)(shi)電(dian)(dian)(dian)(dian)位(wei)(wei)-1. 22r。該例子(zi)可(ke)以說明(ming)，石墨接(jie)(jie)地(di)板短(duan)(duan)路(lu)(lu)，造成保護距離(li)的加大(da)。甚至(zhi)會造成離(li)開通(tong)電(dian)(dian)(dian)(dian)點處(chu)的管(guan)(guan)(guan)道(dao)(dao)過保護。31#閥(fa)(fa)室(shi)(shi)沒有(you)恒電(dian)(dian)(dian)(dian)位(wei)(wei)儀(yi)，管(guan)(guan)(guan)道(dao)(dao)與按地(di)網短(duan)(duan)路(lu)(lu)。短(duan)(duan)路(lu)(lu)排(pai)除前(qian)，電(dian)(dian)(dian)(dian)位(wei)(wei)-0 64V，短(duan)(duan)路(lu)(lu)排(pai)除后(hou)(hou)，電(dian)(dian)(dian)(dian)位(wei)(wei)1.116V。