几种单层保温弯管施工技术

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英文篇名：Construction Technology of Several Single-layer Thermal Insulation Bending Pipes 作者：纪亮 英文作者：Ji Liang; 关键词：单层保温弯管 ; 分段浇注 ; 预制半瓦 英文关键词：single-layer heat preservation elbow;;sectional casting;;prefabricated half-tile 中文刊名：WGTX 英文刊名：Chemical Engineering Design Communications 机构：中海油能源发展股份有限公司管道工程分公司; 出版日期：2019-07-28 出版单位：化工设计通讯 年：2019 期：v.45;No.205 语种：中文; 页：WGTX201907021 页数：2 CN：07 ISSN：43-1108/TQ 分类号：39+95

摘要

单层保温管施工常用的"一步法"和"管中管"工艺无法在弯管上实现。因此,为了得到小角度的单层保温冷弯管,最直接的方式就是单层保温管的直接弯制。但是,由于聚氨酯泡沫的机械强度较低,直接弯制会造成保温层开裂、分层等问题。为此,又通过试验验证了几种单层保温冷弯管的施工工艺,解决了保温层破坏的问题,但降低了施工效率,增加了施工成本。综合考虑项目整体情况,可以采用多种工艺结合的方式进行施工,以满足项目要求。
        The common "one-step method" and "pipe-in-pipe" technology in the construction of single-layer insulation pipe can not be realized in the elbow.Therefore,in order to obtain a small angle of single-layer thermal insulation cold bending pipe,the most direct way is the direct bending of single-layer thermal insulation pipe.However,due to the low mechanical strength of polyurethane foam,the direct bending will cause insulation layer cracking and delamination.For this reason,several construction techniques of single-layer heat preservation cold bending pipe are verified through experiments,which solves the problem of damage of heat preservation layer,but reduces the construction efficiency and increases the construction cost.Considering the overall situation of the project,we can adopt a combination of various technologies to carry out construction to meet the project requirements.

引文

[1]周星凯,吴月先.土库曼斯坦输气弯管预制保温模块供给技术方案[J].新疆石油科技,2013,23(2):63-64.
    [2]高国军,杜宝银.国外海底单层保温管一体式成型新工艺[J].科技创新导报,2013(31):77-78.
    [3]丁泉允,王秋萍.大口径管道防腐保温“一步法”工艺研究[J].全面腐蚀控制,2017,31(7):68-71.