20號無縫鋼管在(zai)100℃與225℃溫(wen)度(temperature)的許應力的區(qu)別
20號鋼許(xu)用(yong)應力:20號鋼在225℃下的許(xu)用(yong)應力:(16-36mm)111-124MPa之間;(6-16mm)之間117-131MPa
20號鋼(gang)在100℃下的許(xu)用應(ying)(ying)力:150℃時,20號鋼(gang)鋼(gang)管的許(xu)用應(ying)(ying)力為130 MPa,20號鋼(gang)鍛件的許(xu)用應(ying)(ying)力為108MPa
無縫鋼管用途很廣泛(extensive)。一般用途的無縫鋼管由(you)普通的(de)碳(C)素結構(gou)(Structure)鋼、低合金結構(gou)鋼或(huo)合金結構(gou)鋼軋制,產(chan)量最多,主(zhu)要用(yong)(yong)作輸送流體的(de)管道或(huo)結構(gou)零件。2、根(gen)據用(yong)(yong)途不同分三類(lei)供應:
A、按(an)化學(Chemistry)成分(fen)(ingredient)和機械(machinery)性能(xìng néng)供應(ying);
B、按機械(machinery)性能(xìng néng)供應;
C、按水壓試驗供(gong)應。GB9948無(wu)(wu)(wu)(wu)縫鋼管(guan)主要用(yong)(yong)來(lai)生產(chan)氣(qi)動或液壓 元件的產(chan)品,如氣(qi)缸(gang)或油(you)缸(gang),都是用(yong)(yong)無(wu)(wu)(wu)(wu)縫管(guan)。精(jing)密無(wu)(wu)(wu)(wu)縫鋼管(guan)的化學(xue)成分(fen)有(you)碳C、硅Si、錳(meng)Mn、硫S、磷P、鉻Cr。GB5310無(wu)(wu)(wu)(wu)縫鋼管(guan)按照用(yong)(yong)途分(fen)為結(jie)構用(yong)(yong)無(wu)(wu)(wu)(wu)縫鋼管(guan);輸送用(yong)(yong)無(wu)(wu)(wu)(wu)縫鋼管(guan);鍋(guo)爐用(yong)(yong)無(wu)(wu)(wu)(wu)縫鋼管(guan);鍋(guo)爐用(yong)(yong)高壓無(wu)(wu)(wu)(wu)縫鋼管(guan).無(wu)(wu)(wu)(wu)縫鋼管(guan)按照斷面形(xing)(xing)(xing)狀(zhuang),無(wu)(wu)(wu)(wu)縫鋼管(guan)分(fen)圓形(xing)(xing)(xing)和異形(xing)(xing)(xing)兩種,異形(xing)(xing)(xing)管(guan)有(you)方形(xing)(xing)(xing)、橢圓形(xing)(xing)(xing)、三角形(xing)(xing)(xing)、六角形(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)、星(xing)形(xing)(xing)(xing)、 帶翅管(guan)多種復雜形(xing)(xing)(xing)狀(zhuang)。按
A、b類供應的(de)(de)鋼(gang)(gang)管(guan),如(ru)用(yong)于(yu)承受液體壓力(pressure),也(ye)要(yao)進行(xing)水壓(特指:壓強(qiang))試驗。3、專(zhuan)門用(yong)途的(de)(de)無(wu)縫(feng)管(guan)有鍋(guo)爐(Boilers)用(yong)無(wu)縫(feng)管(guan)、化(hua)工(gong)(gong)電力用(yong),地質(zhi)用(yong)無(wu)縫(feng)鋼(gang)(gang)管(guan)及石(shi)油(petroleum)用(yong)無(wu)縫(feng)管(guan)等多種(zhong)。 無(wu)縫(feng)鋼(gang)(gang)管(guan)具有中空(zhōng kōng)截面(mian),大量(liang)用(yong)作輸(shu)送(song)流體的(de)(de)管(guan)道(Conduit),如(ru)輸(shu)送(song)石(shi)油、天(tian)然(natural)氣、煤(mei)氣(Coal Gas)、水及某(mou)些固體物(wu)料的(de)(de)管(guan)道等。鋼(gang)(gang)管(guan)與圓鋼(gang)(gang)等實心(xin)鋼(gang)(gang)材(cai)相比(bi),在抗(kang)彎抗(kang)扭強(qiang)度(strength)相同時,重量(liang)較(jiao)輕,是一種(zhong)經濟(Economy)截面(mian)鋼(gang)(gang)材(cai)。 廣泛(fan)(extensive)用(yong)于(yu)制造(zao)(zhì zào)結構(Structure)件和(he)機(ji)械(xie)(machinery)零件,如(ru)石(shi)油鉆桿(gan)、汽車(auto)傳動軸(zhou)(傳動軸(zhou)組成:軸(zhou)管(guan)、伸(shen)縮(suo)套和(he)萬向節)、自行(xing)車架以及建(jian)筑(Architecture)施工(gong)(gong)中用(yong)的(de)(de)鋼(gang)(gang)腳手架等用(yong)鋼(gang)(gang)管(guan)制造(zao)環(huan)形零件,可(ke)提(ti)高(gao)材(cai)料(Material)利用(yong)率(availability),簡化(hua)制造(zao)工(gong)(gong)序,節約材(cai)料和(he)加工(gong)(gong)(Processing)工(gong)(gong)時,已(yi)廣泛(fan)用(yong)鋼(gang)(gang)管(guan)來制造(zao)。