某管(guan)(guan)(guan)廊頂(ding)部大口(kou)徑管(guan)(guan)(guan)線(xian)呈現拱(gong)形狀(zhuang)，分析原因，是管(guan)(guan)(guan)廊頂(ding)部管(guan)(guan)(guan)道(dao)暴露在陽(yang)光下(xia)，管(guan)(guan)(guan)道(dao)上(shang)部的溫(wen)(wen)度和下(xia)部的溫(wen)(wen)度會不同，管(guan)(guan)(guan)道(dao)出現熱拱(gong)現象。熱拱(gong)現象影響了管(guan)(guan)(guan)線(xian)的安全狀(zhuang)態，需(xu)要配管(guan)(guan)(guan)設計(ji)時進(jin)行(xing)設計(ji)處理。
對于管(guan)(guan)道(dao)環(huan)境(jing)(jing)溫度，有一些參考資料或(huo)規范上(shang)寫著20℃。有的(de)工(gong)程(cheng)項目按20℃環(huan)境(jing)(jing)溫度評(ping)定(ding)管(guan)(guan)道(dao)柔(rou)性造成設計事故(gu)發生。環(huan)境(jing)(jing)溫度在管(guan)(guan)道(dao)應(ying)力分析(xi)中是(shi)個(ge)很重要的(de)設計條(tiao)件，需(xu)要根據工(gong)程(cheng)實際情況(kuang)來(lai)確定(ding)，一般會用年平均(jun)溫度來(lai)進行(xing)考慮，但是(shi)，真正的(de)環(huan)境(jing)(jing)溫度是(shi)指工(gong)程(cheng)所在地管(guan)(guan)道(dao)安裝最后焊(han)縫施工(gong)時(shi)的(de)環(huan)境(jing)(jing)溫度，這(zhe)樣就(jiu)可以決(jue)定(ding)安裝的(de)初態。
某管(guan)廊框架結(jie)構的荷(he)載條件(jian)設計時，該設計單(dan)位管(guan)道專業給(gei)結(jie)構專業的垂直荷(he)載數據(ju)普遍偏大(da)了至少5倍，造(zao)成(cheng)結(jie)構梁柱(zhu)比正常(chang)粗大(da)了很多(duo)，結(jie)構立面水(shui)平斜撐(cheng)比正常(chang)多(duo)了不少。
某現(xian)(xian)場管線(xian)剛投入試運(yun)行幾天，就發現(xian)(xian)管廊上(shang)某工(gong)藝(yi)毒(du)性管線(xian)泄(xie)漏，幸虧巡檢人員(yuan)及時發現(xian)(xian)，未(wei)造成嚴重(zhong)后果。經查發現(xian)(xian)是(shi)因為壓力管道設計人員(yuan)遺漏了(le)自(zi)然補償彎設計，運(yun)行后引(yin)起(qi)管線(xian)彎頭應力超標而裂(lie)縫(feng)泄(xie)漏。
GB 50316《工(gong)業金(jin)屬(shu)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)設計規范》、SH 3059《石油化工(gong)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)設計器材選用(yong)通則(ze)》HG／T 20645《化工(gong)裝置管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)機(ji)械(xie)設計規定》、ASME B31.3《工(gong)藝管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)》等常(chang)用(yong)的(de)(de)標準規范詳細介紹了壓力(li)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)元件的(de)(de)強度計算，包括(kuo)下列金(jin)屬(shu)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)(dao)組成件：金(jin)屬(shu)直管(guan)(guan)(guan)(guan)(guan)；彎(wan)管(guan)(guan)(guan)(guan)(guan)／彎(wan)頭(tou)(tou)及斜(xie)接彎(wan)頭(tou)(tou)；三通；盲板(ban)與平板(ban)封頭(tou)(tou)；開孔(kong)（支管(guan)(guan)(guan)(guan)(guan)）補(bu)強；蒸汽夾套管(guan)(guan)(guan)(guan)(guan)端板(ban)等。
