產品詳細介紹

德宏ND鋼管報價資訊

厚(hou)壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的生產(chan)制造工藝可分為(wei)(wei)冷(leng)(leng)拔(ba)冷(leng)(leng)軋熱(re)軋我(wo)(wo)們把(ba)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)和(he)(he)壁(bi)(bi)(bi)厚(hou)之(zhi)(zhi)比小(xiao)于20的鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)稱為(wei)(wei)厚(hou)壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan).山(shan)東聊(liao)(liao)(liao)城(cheng)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠生產(chan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)(deng)質(zhi)(zhi)量高(gao)價(jia)(jia)格(ge)(ge)低(di)現貨(huo)多(duo)規(gui)(gui)格(ge)(ge)全(quan)并(bing)提(ti)供切割零售(shou).厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)我(wo)(wo)們把(ba)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)和(he)(he)壁(bi)(bi)(bi)厚(hou)之(zhi)(zhi)比小(xiao)于20的鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)稱為(wei)(wei)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan).山(shan)東聊(liao)(liao)(liao)城(cheng)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠生產(chan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)大(da)小(xiao)口徑(jing)(jing)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)(deng)質(zhi)(zhi)量高(gao)價(jia)(jia)格(ge)(ge)低(di)現貨(huo)多(duo)規(gui)(gui)格(ge)(ge)全(quan)并(bing)提(ti)供切割零售(shou).厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)我(wo)(wo)們把(ba)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)和(he)(he)壁(bi)(bi)(bi)厚(hou)之(zhi)(zhi)比小(xiao)于20的鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)稱為(wei)(wei)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan).山(shan)東聊(liao)(liao)(liao)城(cheng)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠生產(chan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)大(da)小(xiao)口徑(jing)(jing)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)(deng)質(zhi)(zhi)量高(gao)價(jia)(jia)格(ge)(ge)低(di)現貨(huo)多(duo)規(gui)(gui)格(ge)(ge)全(quan)并(bing)提(ti)供切割零售(shou).20#厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)生產(chan)的生產(chan)制造工藝可分為(wei)(wei)冷(leng)(leng)拔(ba)冷(leng)(leng)軋熱(re)軋我(wo)(wo)們把(ba)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外徑(jing)(jing)和(he)(he)壁(bi)(bi)(bi)厚(hou)之(zhi)(zhi)比小(xiao)于20的鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)稱為(wei)(wei)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan).山(shan)東聊(liao)(liao)(liao)城(cheng)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)廠生產(chan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)無(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)鋼(gang)(gang)(gang)(gang)(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)厚(hou)壁(bi)(bi)(bi)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等(deng)(deng)(deng)質(zhi)(zhi)量高(gao)價(jia)(jia)格(ge)(ge)低(di)現貨(huo)多(duo)規(gui)(gui)格(ge)(ge)全(quan)并(bing)提(ti)供切割零售(shou).

一(yi)、鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)把1英寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)分(fen)(fen)成(cheng)8等分(fen)(fen)；1/81/43/81/25/83/47/8英寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)——相(xiang)(xiang)當于(yu)通(tong)(tong)常(chang)說的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)1分(fen)(fen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)到(dao)7分(fen)(fen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。更小(xiao)(xiao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)用(yong)(yong)1/16、1/32、1/64來(lai)表(biao)(biao)示(shi)(shi)(shi)，單位還(huan)是(shi)(shi)(shi)(shi)(shi)英寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)。如(ru)(ru)果分(fen)(fen)母和(he)(he)分(fen)(fen)子能(neng)(neng)夠約分(fen)(fen)（如(ru)(ru)分(fen)(fen)子是(shi)(shi)(shi)(shi)(shi)2、4、8、16、32）就(jiu)應(ying)該(gai)約分(fen)(fen)。英寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)示(shi)(shi)(shi)是(shi)(shi)(shi)(shi)(shi)在(zai)(zai)(zai)(zai)(zai)右(you)上(shang)(shang)(shang)角打上(shang)(shang)(shang)兩撇，如(ru)(ru)1/2如(ru)(ru)DN25（25mm，下(xia)(xia)同(tong)(tong)(tong)）的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)是(shi)(shi)(shi)(shi)(shi)英制(zhi)(zhi)(zhi)1的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，也(ye)(ye)是(shi)(shi)(shi)(shi)(shi)解放(fang)前的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)8分(fen)(fen)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。DN15的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)是(shi)(shi)(shi)(shi)(shi)英制(zhi)(zhi)(zhi)1/2的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，也(ye)(ye)是(shi)(shi)(shi)(shi)(shi)解放(fang)前的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)4分(fen)(fen)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。如(ru)(ru)DN20的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)就(jiu)是(shi)(shi)(shi)(shi)(shi)英制(zhi)(zhi)(zhi)3/4的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)，也(ye)(ye)是(shi)(shi)(shi)(shi)(shi)解放(fang)前的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)6分(fen)(fen)水(shui)(shui)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)。一(yi)、尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)：DN15（4分(fen)(fen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN20（6分(fen)(fen)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN25（1寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN32（1寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)2管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN40（1寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)半(ban)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN50（2寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN65（2寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)半(ban)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN80（3寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN100（4寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN125（5寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN150（6寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN200（8寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）、DN250（10寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)）等。二、鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)規(gui)(gui)(gui)(gui)(gui)格(ge)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)：有(you)(you)英制(zhi)(zhi)(zhi)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)和(he)(he)國際標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)兩種(zhong)(zhong)。鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)規(gui)(gui)(gui)(gui)(gui)格(ge)表(biao)(biao)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)術語尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)A、公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)：是(shi)(shi)(shi)(shi)(shi)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)名義尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)，是(shi)(shi)(shi)(shi)(shi)用(yong)(yong)戶(hu)和(he)(he)生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)希望得(de)(de)到(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)理(li)(li)(li)想尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)，也(ye)(ye)是(shi)(shi)(shi)(shi)(shi)合(he)(he)同(tong)(tong)(tong)中(zhong)(zhong)(zhong)(zhong)注(zhu)明的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)訂貨(huo)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)。B、實際尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)：是(shi)(shi)(shi)(shi)(shi)生(sheng)(sheng)產(chan)(chan)過程中(zhong)(zhong)(zhong)(zhong)所(suo)(suo)得(de)(de)到(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)實際尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)，該(gai)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)往(wang)往(wang)大于(yu)或(huo)小(xiao)(xiao)于(yu)公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)。這種(zhong)(zhong)大于(yu)或(huo)小(xiao)(xiao)于(yu)公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)現象(xiang)(xiang)稱(cheng)(cheng)(cheng)為(wei)(wei)(wei)偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)。C、米(mi)(mi)重：每(mei)米(mi)(mi)重量=0.02466*壁(bi)(bi)(bi)(bi)厚*（外(wai)(wai)(wai)徑(jing)(jing)-壁(bi)(bi)(bi)(bi)厚）偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)和(he)(he)公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)A、偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)：在(zai)(zai)(zai)(zai)(zai)生(sheng)(sheng)產(chan)(chan)過程中(zhong)(zhong)(zhong)(zhong)，由于(yu)實際尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)難于(yu)達(da)到(dao)公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)要(yao)(yao)(yao)求，即(ji)往(wang)往(wang)大于(yu)或(huo)小(xiao)(xiao)于(yu)公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)，所(suo)(suo)以(yi)(yi)(yi)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)了(le)實際尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)與(yu)公(gong)(gong)(gong)(gong)(gong)稱(cheng)(cheng)(cheng)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)之間允(yun)許(xu)有(you)(you)一(yi)差(cha)(cha)(cha)(cha)(cha)值(zhi)。差(cha)(cha)(cha)(cha)(cha)值(zhi)為(wei)(wei)(wei)正值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)叫(jiao)(jiao)(jiao)正偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)，差(cha)(cha)(cha)(cha)(cha)值(zhi)為(wei)(wei)(wei)負值(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)叫(jiao)(jiao)(jiao)負偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)。B、公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)：標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)正、負偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)值(zhi)值(zhi)之和(he)(he)叫(jiao)(jiao)(jiao)做公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)，亦(yi)叫(jiao)(jiao)(jiao)公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)帶(dai)。偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)是(shi)(shi)(shi)(shi)(shi)有(you)(you)方(fang)(fang)(fang)向(xiang)(xiang)性的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，即(ji)以(yi)(yi)(yi)正或(huo)負表(biao)(biao)示(shi)(shi)(shi)；公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)是(shi)(shi)(shi)(shi)(shi)沒有(you)(you)方(fang)(fang)(fang)向(xiang)(xiang)性的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，因(yin)此，把偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)值(zhi)稱(cheng)(cheng)(cheng)為(wei)(wei)(wei)正公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)或(huo)負公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)叫(jiao)(jiao)(jiao)法(fa)是(shi)(shi)(shi)(shi)(shi)錯誤的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。交貨(huo)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)交貨(huo)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)又(you)稱(cheng)(cheng)(cheng)用(yong)(yong)戶(hu)要(yao)(yao)(yao)求長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)或(huo)合(he)(he)同(tong)(tong)(tong)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)。標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)對交貨(huo)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)有(you)(you)以(yi)(yi)(yi)下(xia)(xia)幾種(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)：A、通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)（又(you)稱(cheng)(cheng)(cheng)非(fei)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)）：凡(fan)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)在(zai)(zai)(zai)(zai)(zai)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)范(fan)(fan)(fan)(fan)圍(wei)內(nei)而(er)且無固定(ding)(ding)(ding)(ding)(ding)(ding)(ding)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)要(yao)(yao)(yao)求的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，均(jun)稱(cheng)(cheng)(cheng)為(wei)(wei)(wei)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)。例(li)(li)如(ru)(ru)結(jie)構(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)：熱軋（擠壓(ya)、擴）鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)3000mm～12000mm；冷拔（軋）鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)2000mmm～10500mm。B、定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)：定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)應(ying)在(zai)(zai)(zai)(zai)(zai)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)范(fan)(fan)(fan)(fan)圍(wei)內(nei)，是(shi)(shi)(shi)(shi)(shi)合(he)(he)同(tong)(tong)(tong)中(zhong)(zhong)(zhong)(zhong)要(yao)(yao)(yao)求的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)某一(yi)固定(ding)(ding)(ding)(ding)(ding)(ding)(ding)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)。但實際操(cao)作中(zhong)(zhong)(zhong)(zhong)都切(qie)出(chu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)是(shi)(shi)(shi)(shi)(shi)不大可(ke)(ke)(ke)能(neng)(neng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，因(yin)此標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)對定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)了(le)允(yun)許(xu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)正偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)值(zhi)。以(yi)(yi)(yi)結(jie)構(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)為(wei)(wei)(wei)：生(sheng)(sheng)產(chan)(chan)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)比(bi)(bi)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)成(cheng)材(cai)率(lv)(lv)下(xia)(xia)降(jiang)(jiang)幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)較大，生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)提(ti)出(chu)加(jia)(jia)(jia)價(jia)要(yao)(yao)(yao)求是(shi)(shi)(shi)(shi)(shi)合(he)(he)理(li)(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。加(jia)(jia)(jia)價(jia)幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)各企(qi)(qi)(qi)業(ye)不盡(jin)一(yi)致，一(yi)般(ban)為(wei)(wei)(wei)基(ji)(ji)價(jia)基(ji)(ji)礎上(shang)(shang)(shang)加(jia)(jia)(jia)價(jia)10%左右(you)。C、倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)：倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)應(ying)在(zai)(zai)(zai)(zai)(zai)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)范(fan)(fan)(fan)(fan)圍(wei)內(nei)，合(he)(he)同(tong)(tong)(tong)中(zhong)(zhong)(zhong)(zhong)應(ying)注(zhu)明單倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)及(ji)構(gou)成(cheng)總長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)倍(bei)(bei)數(shu)（例(li)(li)如(ru)(ru)3000mm×3，即(ji)3000mm的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)3倍(bei)(bei)數(shu)，總長(chang)(chang)(chang)(chang)(chang)(chang)為(wei)(wei)(wei)9000mm）。實際操(cao)作中(zhong)(zhong)(zhong)(zhong)，應(ying)在(zai)(zai)(zai)(zai)(zai)總長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)基(ji)(ji)礎上(shang)(shang)(shang)加(jia)(jia)(jia)上(shang)(shang)(shang)允(yun)許(xu)正偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)20mm，再加(jia)(jia)(jia)上(shang)(shang)(shang)每(mei)個(ge)單倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)應(ying)留(liu)切(qie)口(kou)(kou)余量。以(yi)(yi)(yi)結(jie)構(gou)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)為(wei)(wei)(wei)例(li)(li)，規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)留(liu)切(qie)口(kou)(kou)余量：外(wai)(wai)(wai)徑(jing)(jing)≤159mm為(wei)(wei)(wei)5～10mm；外(wai)(wai)(wai)徑(jing)(jing)159mm為(wei)(wei)(wei)10～15mm。若標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)無倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)及(ji)切(qie)割余量規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)時，應(ying)由供(gong)需雙方(fang)(fang)(fang)協(xie)商并(bing)在(zai)(zai)(zai)(zai)(zai)合(he)(he)同(tong)(tong)(tong)中(zhong)(zhong)(zhong)(zhong)注(zhu)明。倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)同(tong)(tong)(tong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)一(yi)樣(yang)，會給生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)帶(dai)來(lai)成(cheng)材(cai)率(lv)(lv)大幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)降(jiang)(jiang)低，因(yin)此生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)提(ti)出(chu)加(jia)(jia)(jia)價(jia)是(shi)(shi)(shi)(shi)(shi)合(he)(he)理(li)(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，其(qi)加(jia)(jia)(jia)價(jia)幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)同(tong)(tong)(tong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)加(jia)(jia)(jia)價(jia)幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)基(ji)(ji)本相(xiang)(xiang)同(tong)(tong)(tong)。D、范(fan)(fan)(fan)(fan)圍(wei)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)：范(fan)(fan)(fan)(fan)圍(wei)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)在(zai)(zai)(zai)(zai)(zai)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)范(fan)(fan)(fan)(fan)圍(wei)內(nei)，當用(yong)(yong)戶(hu)要(yao)(yao)(yao)求其(qi)中(zhong)(zhong)(zhong)(zhong)某一(yi)固定(ding)(ding)(ding)(ding)(ding)(ding)(ding)范(fan)(fan)(fan)(fan)圍(wei)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)時，需在(zai)(zai)(zai)(zai)(zai)合(he)(he)同(tong)(tong)(tong)中(zhong)(zhong)(zhong)(zhong)注(zhu)明。例(li)(li)如(ru)(ru)：通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)為(wei)(wei)(wei)3000～12000mm，而(er)范(fan)(fan)(fan)(fan)圍(wei)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)為(wei)(wei)(wei)6000～8000mm或(huo)8000～10000mm。可(ke)(ke)(ke)見(jian)，范(fan)(fan)(fan)(fan)圍(wei)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)比(bi)(bi)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)尺(chi)(chi)(chi)(chi)和(he)(he)倍(bei)(bei)尺(chi)(chi)(chi)(chi)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)要(yao)(yao)(yao)求寬松(song)，但比(bi)(bi)通(tong)(tong)常(chang)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)加(jia)(jia)(jia)嚴很(hen)多，也(ye)(ye)會給生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)帶(dai)來(lai)成(cheng)材(cai)率(lv)(lv)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)降(jiang)(jiang)低。因(yin)此生(sheng)(sheng)產(chan)(chan)企(qi)(qi)(qi)業(ye)提(ti)出(chu)加(jia)(jia)(jia)價(jia)是(shi)(shi)(shi)(shi)(shi)有(you)(you)道(dao)理(li)(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，其(qi)加(jia)(jia)(jia)價(jia)幅(fu)(fu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)一(yi)般(ban)在(zai)(zai)(zai)(zai)(zai)基(ji)(ji)價(jia)上(shang)(shang)(shang)加(jia)(jia)(jia)價(jia)4%左右(you)。壁(bi)(bi)(bi)(bi)厚不均(jun)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)壁(bi)(bi)(bi)(bi)厚不可(ke)(ke)(ke)能(neng)(neng)各處相(xiang)(xiang)同(tong)(tong)(tong)，在(zai)(zai)(zai)(zai)(zai)其(qi)橫截面(mian)及(ji)縱向(xiang)(xiang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)體上(shang)(shang)(shang)客觀存在(zai)(zai)(zai)(zai)(zai)壁(bi)(bi)(bi)(bi)厚不等現象(xiang)(xiang)，即(ji)壁(bi)(bi)(bi)(bi)厚不均(jun)。為(wei)(wei)(wei)了(le)控制(zhi)(zhi)(zhi)這種(zhong)(zhong)不均(jun)勻(yun)性，在(zai)(zai)(zai)(zai)(zai)有(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)了(le)壁(bi)(bi)(bi)(bi)厚不均(jun)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)允(yun)許(xu)指標(biao)(biao)，一(yi)般(ban)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)不超過壁(bi)(bi)(bi)(bi)厚公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)80%（經(jing)供(gong)需雙方(fang)(fang)(fang)協(xie)商后(hou)執行）。橢(tuo)圓(yuan)(yuan)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)在(zai)(zai)(zai)(zai)(zai)圓(yuan)(yuan)形鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)橫截面(mian)上(shang)(shang)(shang)存在(zai)(zai)(zai)(zai)(zai)著(zhu)外(wai)(wai)(wai)徑(jing)(jing)不等的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)現象(xiang)(xiang)，即(ji)存在(zai)(zai)(zai)(zai)(zai)著(zhu)不一(yi)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)互相(xiang)(xiang)垂(chui)直(zhi)(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)外(wai)(wai)(wai)徑(jing)(jing)和(he)(he)小(xiao)(xiao)外(wai)(wai)(wai)徑(jing)(jing)，則(ze)外(wai)(wai)(wai)徑(jing)(jing)與(yu)小(xiao)(xiao)外(wai)(wai)(wai)徑(jing)(jing)之差(cha)(cha)(cha)(cha)(cha)即(ji)為(wei)(wei)(wei)橢(tuo)圓(yuan)(yuan)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)（或(huo)不圓(yuan)(yuan)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)）。為(wei)(wei)(wei)了(le)控制(zhi)(zhi)(zhi)橢(tuo)圓(yuan)(yuan)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)，有(you)(you)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)了(le)橢(tuo)圓(yuan)(yuan)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)允(yun)許(xu)指標(biao)(biao)，一(yi)般(ban)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)為(wei)(wei)(wei)不超過外(wai)(wai)(wai)徑(jing)(jing)公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)80%（經(jing)供(gong)需雙方(fang)(fang)(fang)協(xie)商后(hou)執行）。彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)在(zai)(zai)(zai)(zai)(zai)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)方(fang)(fang)(fang)向(xiang)(xiang)上(shang)(shang)(shang)呈曲(qu)(qu)(qu)(qu)(qu)線(xian)(xian)狀(zhuang)，用(yong)(yong)數(shu)字表(biao)(biao)示(shi)(shi)(shi)出(chu)其(qi)曲(qu)(qu)(qu)(qu)(qu)線(xian)(xian)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)即(ji)叫(jiao)(jiao)(jiao)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)。標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)中(zhong)(zhong)(zhong)(zhong)規(gui)(gui)(gui)(gui)(gui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)一(yi)般(ban)分(fen)(fen)為(wei)(wei)(wei)如(ru)(ru)下(xia)(xia)兩種(zhong)(zhong)：A、局部彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)：用(yong)(yong)一(yi)米(mi)(mi)長(chang)(chang)(chang)(chang)(chang)(chang)直(zhi)(zhi)尺(chi)(chi)(chi)(chi)靠(kao)量在(zai)(zai)(zai)(zai)(zai)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)處，測其(qi)弦(xian)高（mm），即(ji)為(wei)(wei)(wei)局部彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)數(shu)值(zhi)，其(qi)單位為(wei)(wei)(wei)mm/m，表(biao)(biao)示(shi)(shi)(shi)方(fang)(fang)(fang)法(fa)如(ru)(ru)2.5mm/m。此種(zhong)(zhong)方(fang)(fang)(fang)法(fa)也(ye)(ye)適用(yong)(yong)于(yu)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)端(duan)部彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)。B、全長(chang)(chang)(chang)(chang)(chang)(chang)總彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)：用(yong)(yong)一(yi)根細繩，從管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)兩端(duan)拉(la)緊，測量鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)處弦(xian)高（mm），然后(hou)換(huan)算(suan)成(cheng)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)（以(yi)(yi)(yi)米(mi)(mi)計(ji)(ji)）的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)百分(fen)(fen)數(shu)，即(ji)為(wei)(wei)(wei)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)方(fang)(fang)(fang)向(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)全長(chang)(chang)(chang)(chang)(chang)(chang)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)。例(li)(li)如(ru)(ru)：鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)為(wei)(wei)(wei)8m，測得(de)(de)弦(xian)高30mm則(ze)該(gai)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)全長(chang)(chang)(chang)(chang)(chang)(chang)彎(wan)(wan)(wan)曲(qu)(qu)(qu)(qu)(qu)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)應(ying)為(wei)(wei)(wei)：0.03÷8m×=0.375%尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)超差(cha)(cha)(cha)(cha)(cha)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)超差(cha)(cha)(cha)(cha)(cha)或(huo)叫(jiao)(jiao)(jiao)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)超出(chu)標(biao)(biao)準(zhun)(zhun)(zhun)(zhun)(zhun)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)允(yun)許(xu)偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)。此處的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)主要(yao)(yao)(yao)指鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)外(wai)(wai)(wai)徑(jing)(jing)和(he)(he)壁(bi)(bi)(bi)(bi)厚。通(tong)(tong)常(chang)有(you)(you)人把尺(chi)(chi)(chi)(chi)寸(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)(cun)超差(cha)(cha)(cha)(cha)(cha)習(xi)慣叫(jiao)(jiao)(jiao)公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)出(chu)格(ge)，這種(zhong)(zhong)把偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)和(he)(he)公(gong)(gong)(gong)(gong)(gong)差(cha)(cha)(cha)(cha)(cha)等同(tong)(tong)(tong)起來(lai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)叫(jiao)(jiao)(jiao)法(fa)是(shi)(shi)(shi)(shi)(shi)不嚴密的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，應(ying)叫(jiao)(jiao)(jiao)偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)出(chu)格(ge)。此處的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)可(ke)(ke)(ke)能(neng)(neng)是(shi)(shi)(shi)(shi)(shi)正的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，也(ye)(ye)可(ke)(ke)(ke)能(neng)(neng)是(shi)(shi)(shi)(shi)(shi)負的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，很(hen)少在(zai)(zai)(zai)(zai)(zai)同(tong)(tong)(tong)一(yi)批(pi)鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)中(zhong)(zhong)(zhong)(zhong)出(chu)現正、負偏(pian)(pian)(pian)差(cha)(cha)(cha)(cha)(cha)均(jun)出(chu)格(ge)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)現象(xiang)(xiang)。注(zhu)：計(ji)(ji)算(suan)常(chang)用(yong)(yong)型(xing)材(cai)理(li)(li)(li)論(lun)重量計(ji)(ji)算(suan)公(gong)(gong)(gong)(gong)(gong)式：m=F×L×ρm—質量Kg；F—斷面(mian)積m2/m；L—長(chang)(chang)(chang)(chang)(chang)(chang)度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)m；ρ—密度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)*Kg/m3☆其(qi)中(zhong)(zhong)(zhong)(zhong)：F斷面(mian)積計(ji)(ji)算(suan)方(fang)(fang)(fang)法(fa)：1、方(fang)(fang)(fang)鋼(gang)(gang)(gang)F=a22、鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)(guan)F=3.1416×$（D-$）D—直(zhi)(zhi)徑(jing)(jing)$—厚度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)3、鋼(gang)(gang)(gang)板(ban)、扁鋼(gang)(gang)(gang)F=a×$a—寬度(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)(du)