某管(guan)(guan)廊頂部大口徑管(guan)(guan)線(xian)呈現(xian)拱(gong)形狀，分析原因，是管(guan)(guan)廊頂部管(guan)(guan)道暴露在陽光下，管(guan)(guan)道上部的溫(wen)(wen)度和下部的溫(wen)(wen)度會不(bu)同(tong)，管(guan)(guan)道出(chu)現(xian)熱拱(gong)現(xian)象(xiang)。熱拱(gong)現(xian)象(xiang)影響了管(guan)(guan)線(xian)的安全狀態，需要配管(guan)(guan)設計(ji)時進行設計(ji)處理。

  對于管(guan)(guan)(guan)道(dao)環境(jing)(jing)溫度(du)(du)(du)，有一些參考資料或規(gui)范上寫著20℃。有的(de)工程(cheng)項目按20℃環境(jing)(jing)溫度(du)(du)(du)評定管(guan)(guan)(guan)道(dao)柔性(xing)造成設(she)計事(shi)故發(fa)生。環境(jing)(jing)溫度(du)(du)(du)在管(guan)(guan)(guan)道(dao)應力(li)分(fen)析中是個(ge)很重(zhong)要(yao)的(de)設(she)計條件(jian)，需要(yao)根據工程(cheng)實際情況(kuang)來確(que)定，一般會用(yong)年平均溫度(du)(du)(du)來進(jin)行考慮，但是，真正的(de)環境(jing)(jing)溫度(du)(du)(du)是指工程(cheng)所在地管(guan)(guan)(guan)道(dao)安裝(zhuang)(zhuang)最后焊縫(feng)施工時(shi)的(de)環境(jing)(jing)溫度(du)(du)(du)，這樣(yang)就可以決定安裝(zhuang)(zhuang)的(de)初態。

  某管廊(lang)框架結(jie)構(gou)的(de)荷(he)(he)載條件設計時(shi)，該(gai)設計單(dan)位管道專(zhuan)業給結(jie)構(gou)專(zhuan)業的(de)垂直荷(he)(he)載數據普遍偏大了至少5倍，造成結(jie)構(gou)梁(liang)柱(zhu)比正常粗大了很多，結(jie)構(gou)立面水平(ping)斜撐比正常多了不少。

  某(mou)現(xian)(xian)場管(guan)(guan)線剛投(tou)入(ru)試(shi)運(yun)行幾天(tian)，就發(fa)現(xian)(xian)管(guan)(guan)廊上某(mou)工藝毒(du)性(xing)管(guan)(guan)線泄漏(lou)，幸虧巡檢人員及(ji)時發(fa)現(xian)(xian)，未造成嚴重后(hou)果。經查發(fa)現(xian)(xian)是因為壓力管(guan)(guan)道設計人員遺(yi)漏(lou)了自然補(bu)償彎設計，運(yun)行后(hou)引起管(guan)(guan)線彎頭應力超(chao)標而裂縫(feng)泄漏(lou)。

  GB 50316《工(gong)(gong)業金(jin)屬管(guan)(guan)道(dao)設(she)計(ji)規(gui)范》、SH 3059《石油化工(gong)(gong)管(guan)(guan)道(dao)設(she)計(ji)器材選用(yong)通則》HG／T 20645《化工(gong)(gong)裝(zhuang)置(zhi)管(guan)(guan)道(dao)機械設(she)計(ji)規(gui)定(ding)》、ASME B31.3《工(gong)(gong)藝管(guan)(guan)道(dao)》等(deng)(deng)常用(yong)的標(biao)準規(gui)范詳細(xi)介紹了壓力管(guan)(guan)道(dao)元(yuan)件(jian)的強(qiang)度(du)計(ji)算(suan)，包括下列金(jin)屬管(guan)(guan)道(dao)組(zu)成件(jian)：金(jin)屬直管(guan)(guan)；彎管(guan)(guan)／彎頭及斜接(jie)彎頭；三通；盲板(ban)(ban)與平板(ban)(ban)封(feng)頭；開(kai)孔（支管(guan)(guan)）補(bu)強(qiang)；蒸(zheng)汽夾套管(guan)(guan)端板(ban)(ban)等(deng)(deng)。