某管(guan)廊頂部(bu)大口徑管(guan)線(xian)呈(cheng)現(xian)拱(gong)(gong)(gong)形狀(zhuang)，分析(xi)原(yuan)因，是管(guan)廊頂部(bu)管(guan)道暴露在陽光下，管(guan)道上(shang)部(bu)的溫度(du)和下部(bu)的溫度(du)會(hui)不同，管(guan)道出現(xian)熱(re)拱(gong)(gong)(gong)現(xian)象(xiang)(xiang)。熱(re)拱(gong)(gong)(gong)現(xian)象(xiang)(xiang)影響了管(guan)線(xian)的安全狀(zhuang)態，需要配(pei)管(guan)設計時進(jin)行設計處(chu)理。

  對于(yu)管道(dao)環(huan)(huan)境溫(wen)(wen)(wen)度(du)(du)，有一(yi)些參考資料或規(gui)范上寫(xie)著(zhu)20℃。有的(de)(de)(de)工程(cheng)(cheng)項(xiang)目(mu)按(an)20℃環(huan)(huan)境溫(wen)(wen)(wen)度(du)(du)評定管道(dao)柔(rou)性造成設計(ji)(ji)事(shi)故發生(sheng)。環(huan)(huan)境溫(wen)(wen)(wen)度(du)(du)在(zai)管道(dao)應(ying)力分析中是個很重要的(de)(de)(de)設計(ji)(ji)條件(jian)，需(xu)要根(gen)據工程(cheng)(cheng)實際情況(kuang)來(lai)確定，一(yi)般會用年平均溫(wen)(wen)(wen)度(du)(du)來(lai)進行考慮，但是，真正的(de)(de)(de)環(huan)(huan)境溫(wen)(wen)(wen)度(du)(du)是指工程(cheng)(cheng)所在(zai)地管道(dao)安裝(zhuang)最(zui)后(hou)焊縫施(shi)工時(shi)的(de)(de)(de)環(huan)(huan)境溫(wen)(wen)(wen)度(du)(du)，這(zhe)樣就可以決定安裝(zhuang)的(de)(de)(de)初態。

  某管(guan)廊框(kuang)架結(jie)(jie)構的荷(he)載(zai)條件設(she)(she)計時，該設(she)(she)計單位管(guan)道專(zhuan)業給結(jie)(jie)構專(zhuan)業的垂直荷(he)載(zai)數(shu)據普遍(bian)偏大(da)了(le)至少(shao)5倍，造成結(jie)(jie)構梁柱比正常粗大(da)了(le)很多，結(jie)(jie)構立面(mian)水平斜(xie)撐比正常多了(le)不少(shao)。

  某現(xian)(xian)(xian)場管(guan)線剛投入(ru)試運行幾天，就發(fa)現(xian)(xian)(xian)管(guan)廊上某工藝毒(du)性管(guan)線泄漏，幸(xing)虧巡檢人員及時(shi)發(fa)現(xian)(xian)(xian)，未造成嚴重(zhong)后果。經查發(fa)現(xian)(xian)(xian)是因為(wei)壓力管(guan)道設(she)計人員遺漏了自(zi)然補償彎(wan)設(she)計，運行后引起(qi)管(guan)線彎(wan)頭應力超標而(er)裂縫泄漏。

  GB 50316《工(gong)業金(jin)屬管(guan)道設(she)(she)計規(gui)(gui)范(fan)》、SH 3059《石油化工(gong)管(guan)道設(she)(she)計器材選用通則》HG／T 20645《化工(gong)裝(zhuang)置管(guan)道機械(xie)設(she)(she)計規(gui)(gui)定》、ASME B31.3《工(gong)藝管(guan)道》等常用的標準規(gui)(gui)范(fan)詳(xiang)細(xi)介紹(shao)了壓力管(guan)道元件的強度計算，包括(kuo)下列金(jin)屬管(guan)道組成件：金(jin)屬直管(guan)；彎(wan)管(guan)／彎(wan)頭(tou)(tou)及斜接彎(wan)頭(tou)(tou)；三(san)通；盲板(ban)(ban)(ban)與平板(ban)(ban)(ban)封頭(tou)(tou)；開孔（支(zhi)管(guan)）補強；蒸汽夾套管(guan)端板(ban)(ban)(ban)等。