jiushuangzhongwanhuishuiguanrenwei，neiguanyuwaiguandeshougongshougongshougonghanjiexuyaosuanshifeichangdezuizhongyaodeyiqishengchanxiaoshougongzuo，kenengzhebuzhihuiyingxiangdaoshuiguanzhihoudeshougongshougongshougonghanjiefuwuzhiliang，genghuizhijiejuedingshuiguanmoqideyunyongjiankangweixianxishu，danshibiyaoduiqijinxingkanzhong。changqiyilaihenxuduodekehuduishuangzhongwanhuishuiguanjigangguankoujiandeshougongshougongshougonghanjieyuanzebingbushihenmingque，zuotianxiaoyijiugeidajiatantaorenshiyixiapcbgaopindianluban。jiajiandanzhangwozhexiefangfa。

一、雙層復合管道的焊接方式

dancengfuhexingtongdaoxitongxingzhongdejulvlvyixitongdaoheshougongdianhanpepechengchaguanjianshishunlitongguolvbodianrong（lvbodianrongqi）handecelvelianxide。zheshishiyouyugezhongxingshishouziranhuanjingjuedingjiaoxiao。gezhongxingshishiyongrenqunyugulizhanhuanjinganzhuangchengxu。yizhiyilaizhexie，shougongdianhanshihouzhongyingwengushougongdianhanqueshui、baoyang。shougongdianhanshi，qihoukongzhiyinsuyingzai-15℃he+45℃qujiannei。qihouyinsugengdishizhiyaozaiqihouwengu，qiezengdahehujuticuoshidetiaojianxiaduiqijinxing。lvbodianrong（lvbodianrongqi）handedaolishishoureshougongdianhanpepechengchaguanjianneiwaicengxiadezuzhisidaoyouyidingqihouyinsu（meicidayue200℃），ronghuapepechengchaguanjiangenbuhetongdaocebudepe（julvlvyixi）shicaishiyouyujulvlvyixihuanreman，buguozuzhisifujindeshicaibeironghua。zaiqihouyinsuheshuiyashiyongxia，ronghuakongjianquchengneidejulvlvyixipengzhang，erpangyoudegaodiwenjulvlvyixishicaizuzhuronghuakongjianquchengsuishibianda，zheyangde，tongdaojiubuguanghuaeryoulaokaodeshougongdianhanzaizaiyikuaile。

二、雙層復合管道與轉換接頭的焊接要求

weilegenghaodishibuxiuganghanquanguochengcaozuojiandanyixingbingbaozhengzhiliangguanlibuxiuganghanzhiliangguanli，yinganyishangguidingyaoqiuqu：

1.shigongjiahouguanwangxitonghuashi，wangwangcongyunzuojingneihuowenguduankaiduan。yuzhuanhuazhijietoulianrudeneiguanhewaiguankeyishizheyangjiaoweiwengude。

2.zaijukaitongdaowaiguan，anzhuangshiyongjingjinkoutianliaomifengjianjianhoulai，yongjingangshabudamochulichulineiguanhewaiguandianhanpifubuweiwaidandancongwaiguan，ruhezaiyongweishengbuchuwudianhanjiegongyitouneidandancongwaiguanhedamochulichuliguodequyuzhong。

3.dianhanlaiwangonghou，tijiandianhanjishibushiyetixian dianhanzhengchang。duidiandianhanbuxiugangyahuhantoulaibiaoshiqujueyuyilaiwangongdianhanhetijian。zhongshizaidianhanhuanjiezhongbuyongduidianhanbuxiugangguanjianheshuiguangeiyuwaibuliliang。

4.chenggongxihanfangfa21tianhouxihanfangfashentibuweishixianjixiankangwanqiangdu。zaiyizhengkuaixitongzhuangzhichenggonghou，jianyanxihanfangfazhijietou。

5.zaiwenduguogaohuanjingxia，weihengliangyahuhanchanpinyuyahuhanzhunque，chaidiaoguanwendingji qiande daishibixuyaobianchang。

guanyuduocenghehaoshusongguandaopushebuxiugangxihanxingweijibuxiugangxihanrangdewanfalingtianjiuxianweiwomenguizhengdaozhe。weifeichanghaoditigaoshusongguandaopushecaokongxitongneiguanhewaiguandebuxiugangxihanpinzhi，huanwangninchangyuanguihuabixucongjinzunzhaowangshangrangduicaokong。