家用给水铜管应用分析

指出了家用给水铜管在设计、安装和市场应用中具有的自身特点.从认识和技术层面相结合的基础上,分析了家用给水铜管应用中的若干问题.这些问题是:给水铜管的经济性、铜绿与毒的问题、给水铜管热水管的伸缩问题、铜管的连接方式与焊接、光铜管(裸铜管)与覆塑铜管、铜管与其他金属管材的连接.     

住宅中给水铜管的应用

介绍了给水铜管的优点,分析了住宅中给水铜管在设计、安装和市场应用中具有自身的特点.从家装给水铜管的实际情况出发,结合现阶段家装安装的水平,掏出了家用给水铜管应用的有关技术措施.     

铜管在民用建筑给水系统中的应用探讨

简要介绍了铜管的特性、施工技术。并结合工程实例，对铜管、PP-R管和铜管在民用建筑给水系统中的应用进行了市场分析，提出了铜管推广应用范围。     

铜管直埋在室内燃气工程的应用

阐述铜管直埋的施工工艺技术(铜管的选择、管件的选择、钎料的选择、钎剂的选择、铜管主要连接方式及钎焊)及工艺过程。总结铜管直埋在室内燃气工程中的应用经验。     

薄壁铜管在新建住宅中的应用

介绍了薄壁铜管的应用现状、特性及经济性分析,探讨了薄壁铜管在绿色住宅给水设计中应该注意的问题。     

浅谈铜管在建筑给排水工程中的应用

随着人们生活条件的提高，铜管作为给水管应用到普通住宅已成为可能。铜管具有强度高、韧性好、延展性强的特点。本文将对铜管在使用时应注意的问题做以简述。     

铜管对流散热器的分析

针对对流散热器的工作特性,全面分析了铜管铝片对流散热器在实际工程中应用的优势,并提出应当重视和推进铜管对流散热器的开发应用。     

绿色住宅给水管材的新选择——薄壁铜管

介绍了薄壁铜管的应用现状、特性及经济性分析，探讨了薄壁铜管在绿色住宅给水设计中应该注意的几个问题。     

专家指出：我国建筑用铜管生产发展空间巨大

据《中国建材报》报道我国著名铜管专家、中国有色金属加工工业协会铜业部主任王碧文教授。一直从事铜加工生产技术研究和领导工作，对我国铜加工业的发展了如指掌。他认为：虽然我国建筑用铜管的应用处于起步阶段，但通过技术创新．我国已是全球建筑用铜管的生产技术强国。随着经济发展、生活水平的提高，铜管在我国有着更大的发展空间。     

住宅给水管分水布置的4种管材比较

介绍了住宅给水管分水布置技术,通过对住宅工程实例中应用的铜管与塑料管(PB、PEX和铝塑管)等4种给水管材进行经济分析得出,4种给水管材在分水并联布置时的总预算造价中铜管和PEX管相对较低,并对给水铜管和塑料管的分水布置方式进行了技术分析.     

铜管在建筑给水中的合理设计

介绍了铜管水头损失的计算过程，针对铜管的特点，结合实际多方面加以分析总结，并从铜管的布置与敷设、铜管穿越混凝土的处理等方面，提出了铜管在生产环节的一些建议。     

室内燃气铜管暗装施工技术探讨

分析了铜作为住宅燃气管材的优势,介绍了室内燃气铜管暗装施工的安装要求和管道的连接要求,从管道加工、管道敷设、钎焊连接等方面,详细地阐述了管道的安装,最后就管道的试验与验收进行了探讨,以推广铜管在住宅燃气中的应用。     

铜管换热器内颗粒状污垢生长特性试验分析

污水源热泵系统的节能减排效益显著,污水的管内换热特性急需掌握。基于污垢热阻法建立光滑铜管管内污垢生长特性试验台,试验得出了人工污水颗粒状污垢管内的生长特性,并建立了其渐近型污垢积聚预测模型。试验发现,该人工污水在光滑铜管结垢的诱导期为21 h,污垢热阻稳定时间为95 h,稳定污垢热阻为1.5×10-5m2.K/W。     

铜管在建筑中的应用

介绍了铜管在建筑中应用的优点，结合目前技术发展状况，阐述了管道接口的选择方法，并对其应用前景作了分析，提出了铜管在建筑中推广应用的几点建议。     

新型室内燃气管道管材及安全评估

介绍了国内外标准、规范对不锈钢波纹管、铜管和铝塑复合管等新型管材在室内燃气管道中应用的规定。分析了《城镇燃气设计规范》与国内外标准的异同。     

热水地面辐射采暖常用加热管材水力计算

介绍了热水地面辐射采暖常用管材的水力计算方法,得出了6种常用管材的水力计算表并绘制了水力线算图。对塑料管材和金属Cu管材进行水力比较,结果表明相同条件下Cu管材水力较优;在塑料类管材中,PE—X管材水力较优。     

Effect of pipe corrosion scales on chlorine dioxide consumption in drinking water distribution systems

Previous studies showed that temperature and total organic carbon in drinking water would cause chlorine dioxide (ClO(2)) loss in a water distribution system and affect the efficiency of ClO(2) for Legionella control. However, among the various causes of ClO(2) loss in a drinking water distribution system, the loss of disinfectant due to the reaction with corrosion scales has not been studied in detail. In this study, the corrosion scales from a galvanized iron pipe and a copper pipe that have been in service for more than 10 years were characterized by energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The impact of these corrosion scale materials on ClO(2) decay was investigated in de-ionized water at 25 and 45 degrees C in a batch reactor with floating glass cover. ClO(2) decay was also investigated in a specially designed reactor made from the iron and copper pipes to obtain more realistic reaction rate data. Goethite (alpha-FeOOH) and magnetite (Fe(3)O(4)) were identified as the main components of iron corrosion scale. Cuprite (Cu(2)O) was identified as the major component of copper corrosion scale. The reaction rate of ClO(2) with both iron and copper oxides followed a first-order kinetics. First-order decay rate constants for ClO(2) reactions with iron corrosion scales obtained from the used service pipe and in the iron pipe reactor itself ranged from 0.025 to 0.083 min(-1). The decay rate constant for ClO(2) with Cu(2)O powder and in the copper pipe reactor was much smaller and it ranged from 0.0052 to 0.0062 min(-1). Based on these results, it can be concluded that the corrosion scale will cause much more significant ClO(2) loss in corroded iron pipes of the distribution system than the total organic carbon that may be present in finished water.     

Microbiology, chemistry and biofilm development in a pilot drinking water distribution system with copper and plastic pipes

We studied the changes in water quality and formation of biofilms occurring in a pilot-scale water distribution system with two generally used pipe materials: copper and plastic (polyethylene, PE). The formation of biofilms with time was analysed as the number of total bacteria, heterotrophic plate counts and the concentration of ATP in biofilms. At the end of the experiment (after 308 days), microbial community structure, viable biomass and gram-negative bacterial biomass were analysed via lipid biomarkers (phospholipid fatty acids and lipopolysaccharide 3-hydroxy fatty acids), and the numbers of virus-like particles and total bacteria were enumerated by SYBR Green I staining. The formation of biofilm was slower in copper pipes than in the PE pipes, but after 200 days there was no difference in microbial numbers between the pipe materials. Copper ion led to lower microbial numbers in water during the first 200 days, but thereafter there were no differences between the two pipe materials. The number of virus-like particles was lower in biofilms and in outlet water from the copper pipes than PE pipes. Pipe material influenced also the microbial and gram-negative bacterial community structure in biofilms and water.     

Pipeline materials modify the effectiveness of disinfectants in drinking water distribution systems

We studied how pipe material can modify the effectiveness of UV- and chlorine disinfection in drinking water and biofilms. This study was done with two pipe materials: copper and composite plastic (polyethylene, PE) in a pilot scale water distribution network. UV-disinfection decreased viable bacterial numbers in the pilot waterworks and outlet water of pipes on average by 79%, but in biofilms its disinfecting effect was minor. Chlorine decreased effectively the microbial numbers in water and biofilms of PE pipes. In outlet water from copper pipes, the effect of chlorination was weaker; microbial numbers increased back to the level before chlorination within a few days. In the biofilms present in the copper pipes, chlorine decreased microbial numbers only in front of the pipeline. One reason for weaker efficiency of chlorine in copper pipes was that its concentration declined more rapidly in the copper pipes than in the PE pipes. These results means that copper pipes may require a higher chlorine dosage than plastic pipes to achieve effective disinfection of the pipes.