NEWS
一(yi)(yi)、插管(guan)(guan)（stub-in）的選用(yong)(yong)及工程應用(yong)(yong) 插管(guan)(guan)不是配(pei)管(guan)(guan)附件，其(qi)實是另一(yi)(yi)種接(jie)支(zhi)管(guan)(guan)方法(fa)，插管(guan)(guan)可與(yu)主管(guan)(guan)口徑相同或比主管(guan)(guan)口徑小(xiao)。這種方法(fa)經常(chang)使用(yong)(yong)，但其(qi)應力均集中在連接(jie)口，因此(ci)不適用(yong)(yong)于高(gao)(gao)溫或高(gao)(gao)壓場(chang)合。插管(guan)(guan)比三通便宜，也比三通少兩個焊(han)縫。在支(zhi)管(guan)(guan)的相鄰兩插管(guan)(guan)，距離可由...
①.三(san)通(tong)接頭是(shi)(shi)管(guan)件的一種，它的連接形式(shi)就是(shi)(shi)直接將三(san)通(tong)與鋼管(guan)對(dui)焊(han)，三(san)通(tong)接頭的主要制造(zao)標(biao)準一般是(shi)(shi)GB/T12459《鋼制無(wu)縫焊(han)接管(guan)件》、GB/T13401《鋼板制對(dui)焊(han)管(guan)件》、ASMEB16.9《工廠(chang)制造(zao)的鍛軋(ya)制對(dui)焊(han)管(guan)配件》、SH3408《鋼制對(dui)焊(han)無(wu)縫...
彎(wan)(wan)頭常用于管(guan)道的彎(wan)(wan)曲部位，用以改變(bian)管(guan)道的走向，常用的有(you)45°彎(wan)(wan)頭和90°彎(wan)(wan)頭。一般情況下，應優先(xian)采(cai)用長半徑彎(wan)(wan)頭（longradiuselbow），短(duan)半徑彎(wan)(wan)頭（shortradiuselbow）多用于尺寸受(shou)限制的場合。其最(zui)高工作壓(ya)力(li)不宜超過同規格長半...
a.以材質(zhi)劃分：有碳(tan)鋼(gang)(gang)［ASTMA234（中、高溫用(yong)鍛制(zhi)碳(tan)鋼(gang)(gang)和合金鋼(gang)(gang)管(guan)道配(pei)件(jian)）WPB、WPC］、合金鋼(gang)(gang)（ASTMA234WP1、WP12、WP11、WP22、WP5、WP91、WP911）、不銹鋼(gang)(gang)［ASTMA403（鍛制(zhi)奧氏體不銹鋼(gang)(gang)管(guan)配(pei)件(jian)）...
①.鋼制(zhi)對焊無縫管(guan)(guan)件和鋼板制(zhi)對焊管(guan)(guan)件彎(wan)(wan)(wan)頭(tou)、三(san)通、異徑管(guan)(guan)、管(guan)(guan)帽等管(guan)(guan)件的材質、壓(ya)力等級或(huo)管(guan)(guan)子表號（壁厚(hou)）應與所連接的管(guan)(guan)子一致或(huo)相(xiang)當。 ②.彎(wan)(wan)(wan)頭(tou)宜選用長(chang)半徑彎(wan)(wan)(wan)頭(tou)，當采用短半徑彎(wan)(wan)(wan)頭(tou)時，其最(zui)高(gao)工作壓(ya)力不宜超過(guo)同規格長(chang)半徑彎(wan)(wan)(wan)頭(tou)允許最(zui)高(gao)工作...
①.由于各國(guo)管(guan)(guan)(guan)(guan)(guan)件標(biao)準化程度(du)不同，分支(zhi)管(guan)(guan)(guan)(guan)(guan)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)方(fang)式(shi)(shi)及(ji)管(guan)(guan)(guan)(guan)(guan)件的(de)選擇也不盡(jin)相同。一般情況下(xia)，支(zhi)管(guan)(guan)(guan)(guan)(guan)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)多采(cai)用成形(xing)(xing)支(zhi)管(guan)(guan)(guan)(guan)(guan)連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)件、焊(han)接(jie)(jie)(jie)(jie)的(de)引出口連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)件以(yi)及(ji)支(zhi)管(guan)(guan)(guan)(guan)(guan)直(zhi)接(jie)(jie)(jie)(jie)焊(han)接(jie)(jie)(jie)(jie)在(zai)主(zhu)管(guan)(guan)(guan)(guan)(guan)上(shang)等連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)形(xing)(xing)式(shi)(shi)。值得注意的(de)是(shi)選用支(zhi)管(guan)(guan)(guan)(guan)(guan)直(zhi)接(jie)(jie)(jie)(jie)焊(han)接(jie)(jie)(jie)(jie)在(zai)主(zhu)管(guan)(guan)(guan)(guan)(guan)上(shang)這一種連(lian)(lian)(lian)接(jie)(jie)(jie)(jie)形(xing)(xing)式(shi)(shi)，要(yao)(yao)核(he)算(suan)管(guan)(guan)(guan)(guan)(guan)子是(shi)否需要(yao)(yao)補強。補強方(fang)法參見SH305...
1.對(dui)焊(han)管(guan)(guan)(guan)件 通常用(yong)(yong)于(yu)(yu)DDN≥50mmm的管(guan)(guan)(guan)道(dao)，廣泛(fan)應用(yong)(yong)于(yu)(yu)石油化工裝置中(zhong)的易(yi)燃、可(ke)燃介(jie)質(zhi)以(yi)及高的溫度-壓(ya)力參數的其他介(jie)質(zhi)管(guan)(guan)(guan)道(dao)。對(dui)焊(han)管(guan)(guan)(guan)件比(bi)其他連(lian)(lian)接(jie)形式(shi)的管(guan)(guan)(guan)件連(lian)(lian)接(jie)可(ke)靠、施工方便、價格(ge)便宜、沒有泄(xie)漏點(dian)。管(guan)(guan)(guan)件的壁厚等級用(yong)(yong)管(guan)(guan)(guan)子(zi)表號表示，常用(yong)(yong)的管(guan)(guan)(guan)子(zi)表號...
①.管(guan)(guan)(guan)(guan)道(dao)材料等級(ji)中管(guan)(guan)(guan)(guan)道(dao)的(de)連(lian)接形式，應根(gen)據工藝物料特性和工藝要(yao)求確(que)定。 ②.由于(yu)管(guan)(guan)(guan)(guan)法蘭處容易泄(xie)漏，對(dui)于(yu)高(gao)溫、高(gao)壓管(guan)(guan)(guan)(guan)道(dao)除(chu)必須(xu)用(yong)法蘭連(lian)接外，其他應避免(mian)用(yong)法蘭連(lian)接。焊接連(lian)接的(de)管(guan)(guan)(guan)(guan)道(dao)是保(bao)證(zheng)管(guan)(guan)(guan)(guan)道(dao)無滲漏的(de)最佳(jia)、最經(jing)濟的(de)方法。對(dui)焊連(lian)接適(shi)用(yong)于(yu)公(gong)稱直徑大于(yu)等于(yu)DN50的(de)管(guan)(guan)(guan)(guan)...
①.管(guan)件的(de)選(xuan)擇是指根據管(guan)道級（類(lei)）別、設計條件（如設計溫度(du)、設計壓力）、介質(zhi)特(te)性、材(cai)料加工工藝性能、焊接性能、經濟(ji)性以及(ji)用途來合理確定管(guan)件的(de)溫度(du)-壓力等級、管(guan)件的(de)連(lian)接形式(shi)，并以公稱壓力或者管(guan)表(biao)號、壁厚(hou)表(biao)示(shi)該管(guan)件的(de)等級。 ②.通...
各(ge)種管(guan)(guan)件(jian)(jian)標(biao)準，對焊(han)無縫和(he)(he)鋼(gang)板制(zhi)對焊(han)管(guan)(guan)件(jian)(jian)均等效采用ASMEB16.9和(he)(he)ASMEB16.28。鍛鋼(gang)制(zhi)承插焊(han)和(he)(he)螺紋管(guan)(guan)件(jian)(jian)均等效采用ASMEB16.11。但各(ge)標(biao)準同類管(guan)(guan)件(jian)(jian)的(de)(de)結構(gou)尺寸不盡相同。 常(chang)用的(de)(de)儀表(biao)管(guan)(guan)口有(you)直(zhi)式溫度計管(guan)(guan)口、直(zhi)式雙(shuang)金屬...
管件在管系中(zhong)起著改(gai)變(bian)(bian)走向、改(gai)變(bian)(bian)標高(gao)或改(gai)變(bian)(bian)直徑、封(feng)閉管端以(yi)及(ji)由主管上引出支(zhi)管的(de)作用(yong)。在石油化工(gong)(gong)裝置中(zhong)管道品種多(duo)，管系復雜，形狀各異，簡繁不(bu)等，所用(yong)的(de)管件品種、材質、數(shu)量(liang)也(ye)就很(hen)多(duo)，選用(yong)時需要考慮的(de)因(yin)素也(ye)多(duo)，如圖16.21所示。一(yi)般按用(yong)途、連接方式、材料(liao)、加工(gong)(gong)...
一、低溫(wen)(wen)(wen)閥(fa)門(men)的(de)(de)定(ding)義 不同標準對低溫(wen)(wen)(wen)閥(fa)門(men)有不同定(ding)義。BS6364《低溫(wen)(wen)(wen)用(yong)閥(fa)門(men)》適用(yong)于介(jie)質溫(wen)(wen)(wen)度范圍為-50～-196℃。MSSSP134《對低溫(wen)(wen)(wen)閥(fa)門(men)及其閥(fa)體(ti)／閥(fa)蓋加長體(ti)的(de)(de)要求》對低溫(wen)(wen)(wen)定(ding)義為-100～-195℃。GB／T24925《低溫(wen)(wen)(wen)閥(fa)門(men)技術(shu)條件》規定(ding)介(jie)質溫(wen)(wen)(wen)度范圍...
