20號無縫鋼管在100℃與225℃溫度(temperature)的許應力的區(qu)別
20號鋼許用應力(li)(li):20號鋼在(zai)225℃下的許用應力(li)(li):(16-36mm)111-124MPa之間;(6-16mm)之間117-131MPa
20號鋼(gang)(gang)在(zai)100℃下(xia)的(de)許用應力(li):150℃時,20號鋼(gang)(gang)鋼(gang)(gang)管(guan)的(de)許用應力(li)為(wei)130 MPa,20號鋼(gang)(gang)鍛件(jian)的(de)許用應力(li)為(wei)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(gang)(gang)、低合金結構(gou)鋼(gang)(gang)或合金結構(gou)鋼(gang)(gang)軋制,產量最多,主要(yao)用作輸送(song)流體的(de)管道或結構(gou)零件。2、根(gen)據用途不同分三類供應:
A、按化學(xue)(Chemistry)成分(fen)(ingredient)和(he)機械(machinery)性(xing)能(xìng néng)供應;
B、按機械(machinery)性能(xìng néng)供應(ying);
C、按水壓(ya)試驗供應。GB9948無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)主(zhu)要(yao)用(yong)來生產(chan)氣動(dong)或(huo)液壓(ya) 元件的產(chan)品,如(ru)氣缸或(huo)油缸,都是用(yong)無縫(feng)(feng)(feng)(feng)管(guan)。精密無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)的化學成分有碳C、硅Si、錳(meng)Mn、硫S、磷P、鉻Cr。GB5310無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)按照用(yong)途(tu)分為結構用(yong)無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan);輸送用(yong)無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan);鍋爐用(yong)無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan);鍋爐用(yong)高壓(ya)無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan).無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)按照斷面形(xing)(xing)(xing)(xing)狀,無縫(feng)(feng)(feng)(feng)鋼(gang)(gang)管(guan)分圓形(xing)(xing)(xing)(xing)和異(yi)形(xing)(xing)(xing)(xing)兩種,異(yi)形(xing)(xing)(xing)(xing)管(guan)有方(fang)形(xing)(xing)(xing)(xing)、橢(tuo)圓形(xing)(xing)(xing)(xing)、三角形(xing)(xing)(xing)(xing)、六角形(xing)(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)(xing)、星形(xing)(xing)(xing)(xing)、 帶翅(chi)管(guan)多種復雜形(xing)(xing)(xing)(xing)狀。按
A、b類供應的(de)鋼(gang)(gang)管(guan)(guan),如(ru)用(yong)于(yu)承受液體壓(ya)(ya)力(pressure),也要進行水壓(ya)(ya)(特指(zhi):壓(ya)(ya)強)試驗。3、專門用(yong)途的(de)無縫管(guan)(guan)有鍋爐(Boilers)用(yong)無縫管(guan)(guan)、化工(gong)(gong)電(dian)力用(yong),地質用(yong)無縫鋼(gang)(gang)管(guan)(guan)及石(shi)油(petroleum)用(yong)無縫管(guan)(guan)等(deng)多種。 無縫鋼(gang)(gang)管(guan)(guan)具有中(zhong)空(zhōng kōng)截(jie)面(mian),大量(liang)用(yong)作輸送流體的(de)管(guan)(guan)道(Conduit),如(ru)輸送石(shi)油、天然(natural)氣、煤氣(Coal Gas)、水及某些固體物料的(de)管(guan)(guan)道等(deng)。鋼(gang)(gang)管(guan)(guan)與圓(yuan)鋼(gang)(gang)等(deng)實(shi)心鋼(gang)(gang)材(cai)相(xiang)比,在抗彎抗扭強度(strength)相(xiang)同時(shi),重量(liang)較輕(qing),是一(yi)種經濟(Economy)截(jie)面(mian)鋼(gang)(gang)材(cai)。 廣泛(extensive)用(yong)于(yu)制造(zhì zào)結構(Structure)件和(he)機械(machinery)零件,如(ru)石(shi)油鉆桿、汽車(che)(auto)傳(chuan)動軸(zhou)(傳(chuan)動軸(zhou)組成:軸(zhou)管(guan)(guan)、伸縮套和(he)萬向節)、自行車(che)架以及建(jian)筑(Architecture)施工(gong)(gong)中(zhong)用(yong)的(de)鋼(gang)(gang)腳手架等(deng)用(yong)鋼(gang)(gang)管(guan)(guan)制造環形零件,可提高(gao)材(cai)料(Material)利用(yong)率(availability),簡化制造工(gong)(gong)序,節約材(cai)料和(he)加工(gong)(gong)(Processing)工(gong)(gong)時(shi),已(yi)廣泛用(yong)鋼(gang)(gang)管(guan)(guan)來制造。