内衬（覆）不锈钢复合钢管管道工程技术规程

1.0.2本规程适用于新建、扩建和改建的市政给水排水、建筑给水排水、工业给水排水、消防给水排水和空调水系统工程中采用内衬（覆）不锈钢复合钢管管道系统1.0.3市政给水排水、建筑给水排水、工业给水排水、消防给水排水和空调水系统工程中采用内衬（覆）不锈钢复合钢管管道系统的程规定外，尚应符合国家现行有关标准和现行中国工程建设标准化协会有关标准的1.0.4城镇燃气管道、采暖蒸汽管道、成品油及空气输送管道系统工程中采用内衬（覆）不锈钢复合钢管管道系统的设计、施工及验收除可采用本规程规定，并应符合国家现行有关标准和现行中国工程建设标又称双金属机械复合钢管，将不锈钢管衬入碳钢管内，在机械压力作用下，在又称双金属冶金复合钢管，采用冶金方式，使内层不锈钢层和外层碳钢层在结2.0.3外包钢增强不锈钢管reinforcedstainlesssteelp依靠外层碳钢管提高机械强度，内层不銹钢管提高防腐能力的内衬不锈钢复合内覆在基层（基管）并与基层（基管）熔合为一体的可满足可满足饮水卫生安2.0.7不锈钢复合钢制对焊管件stainlesssteelcompositesteelbuttweldingpipe2.0.8内衬不锈钢复合钢制对焊管件stainlesssteellinedsteelbuttweldingpipe2.0.9内覆不锈钢复合钢制对焊管件stainlesssteelcladsteelbuttweldingpipe3.1.1内衬（覆）不锈钢复合钢管应符合1用于建筑生活给水系统时，应符合现行行业标准《内衬不锈钢复合钢管》2用于工业给水排水管道时，应符合现行国家标准《流体输送用耐蚀合金复合3用于城镇燃气管道、成品油及空气输送管道时，应符合现行国家标准《流体输送用耐蚀合金复合钢管》GB/T31940、现行行业标准《内覆或衬里耐腐蚀合金复GB/T31940、现行国家标准《石油天然气工业用内覆或衬里耐腐蚀合金复合钢管》3.1.2采用焊接连接的不锈钢复合管件应符合现行3.1.3用于生活饮用水和管道直饮水工程中的管材、管件和密封件还应1管材、管件和橡胶密封件应符合现行国家标准《生活饮用水输配水设备及防2密封件还应符合现行国家标准《生活饮用水管道系统用橡胶密封件》GB/T28604或现行国家标准《橡胶密封件给、排水管3.2.1内衬（覆）不锈钢复合钢管的公称尺寸、公称外径、复合管和复表3.2.1内衬（覆）不锈钢复合钢管的公称尺寸、公称外 —1公称尺寸不大于DN150的复合钢管的最小公称壁厚，应符合《低压流体输4对于埋地使用的内衬（覆）不锈钢复合钢管确定壁厚后，还应按现行国家标准《给水排水工程管道结构设计规范》GB50332、现行协会标准《给水排水工程埋4系统压力大于2.5MPa，应选用无缝钢管或符合现行国家标准《石油天然气ReL（MPa）Rm（MPa）D≤168.3mmD＞168.3mm化学成分（质量分数%）CPSNi——— —L360*化学成分（质量分数%）CPSNiN 3.2.8界面剪切试验和夹持力试验的试验方法及要求应符合1内衬不锈钢复合钢管的试验方法及要求应符合现行行业标准《内衬不锈钢复2内覆不锈钢复合钢管的试验方法应符合现行国家标准《复合钢板力学及工艺1内螺纹管件应采用内衬不锈钢可锻铸铁管件。其外坯管件的材料、镀锌层dtL½¾1dtL2342外螺纹管件（内接头）可采用不锈钢铸造管件，其应符合现行国家标准《低3.3.3管道工程中配套使用的内衬不锈钢沟槽式复合管件和内衬不锈钢1外坯管件的标记、结构尺寸、基本参数、壳体材料、耐压强度等应符合现行2消防使用的外坯管件的标记、结构尺寸、基本参数、壳体材料、耐压强度等4配套连接的所使用的卡箍应符合现行国家标准《卡箍式柔性管接头型式与dt包装、运输、贮存等应符合现行协会标准《不锈钢复合钢制对焊管件》T/CECS2采用复层材质的不锈钢材质的管件进行对焊管件使用时，其应符合现行国家标准《钢制对焊管件类型与参数》GB/T12459和《钢制对焊管件技术规范》2特殊需求法兰的设计、制造等技术要求可按照其他现行国家行业标准的规定3.4.2平焊法兰和平焊环与内衬（覆）不锈钢复合钢管的兰和平焊环，在法兰内孔和管体外层碳钢管端面应采用不锈钢焊条或焊丝进行封dhXt3.4.3设计工作压力大于41采用加衬不锈钢的钢制带颈螺纹法兰2采用加衬不锈钢的可锻铸铁制带颈螺纹法兰。其外坯法兰应满足现行国家标准《带颈螺纹铸铁管法兰》GB/T17241.3的规定，并且法兰密封面端应具有能够添1采用加衬不锈钢的带颈法兰。其外坯管件应满足现行国家标准《沟槽式管路3.5.1对埋地使用的内衬（覆）不锈钢复合钢管管道系统的外防腐措施1采用涂塑或覆塑层防腐的，塑层材料和塑层厚度应符合现行国家标准《流体3采用熔结环氧粉末防腐的，塑层材料和塑层厚度应符合《钢质管道熔结环氧4采用石油沥青涂料、环氧煤沥青涂料、环氧树脂玻璃进行钢管外防腐的，涂层材料和涂层厚度应符合现行国家标准《给水排水管道工程施工及验收规范》GB5涂覆前应对钢管内外表面进行抛（喷）射除锈。处理后的表面应无铁锈、焊3.5.2对室内使用的内衬（覆）不锈钢复合钢管外表面宜采用镀锌防腐4.1一般规定4.1.1管道系统设计工作压力和设计工作温度的确定、水力设计、4.1.2管道系统设计工作压力和设计工作温度的确定，壁厚设计并4.1.3内衬（覆）不锈钢复合钢管可采用螺纹连接、沟槽连接、法4.2设计工作压力和设计工作温度件4.2.3焊接连接管件的设计应符合现行协基坯管件符合《可锻铸铁管路连接件》GB/T4.3水力计算4.3.1室外给水管道水力计算应符合现行国家标准《室外给4.3.2室外排水管道的水力计算应符合现行国家标准《室外排4.3.3建筑给水排水管道水力计算应符合现行国家标准《建筑给i=105C-1.85d-4.87qg1.854.3.6消防给水管道水力计算应符合现行国家标准《消防给水及消4.4管道布置与敷设4.4.1室外埋地管道管顶最小4.4.2建筑室内给水管道的布置应符合现行国家标准《建筑给4.4.3室内管道穿越楼板、梁和墙时，管道产生的荷载应计入载。管道穿越混凝土、砌体等承重构件时，应设置保护不宜穿越建筑物之间的沉降缝。管道接头不得埋设在承重1室外明露或室内可能冰冻的场所安装后应进行保温，并在保温层外加设金属2室内明露热水管道应采取相应的保温绝热措施。对有可能结露的部位宜采取2管道的伸缩补偿可选用曲挠橡胶接头、波纹伸缩节等补偿器，后在分流端设3热水水平干管与水平支管连接、水平干管与立管连接、立管与每层热水支管5.1一般规定2对安装所需管材、管件、焊材、仪表密封圈等配件已核对产品合格证、质量保证书、规格型号、品种和数量，并进行外5.1.2施工人员应经内衬（覆）不锈钢复合钢管管道安装的5.1.4内衬（覆）不锈钢复合钢管施工应符合《给排水管道5.1.5管道穿越楼板、墙壁、屋面及嵌墙敷设时，应配合土建2管道嵌墙内暗敷时，管槽宽度可5.2螺纹连接2螺纹应采用圆锥形管螺纹且符合现行国家标准《55°密封管螺纹第2部分：3螺纹加工（套丝）应采用自动套丝机，采用润滑油润滑，并应采用标准螺纹5.2.3管端的螺纹清理加工后，应进行防腐、密封处理，宜采缠绕螺纹或液体生料带涂覆螺纹或两种组合的N×m在确认配件接口已插入内衬（覆）不锈钢复合钢管后，用管钳进行管子与管件的连3管材与给水栓、卫生器具及设备附件连接时，应采用不锈钢或黄铜材质的外螺纹接头进行过渡。过渡后，外螺纹接头在依次连接5.3沟槽连接连接。管道系统的工作压力不得大于沟槽式管接头的公1管端沟槽轧制加工过程应符合现行协会标准《沟槽式连接管道工程技术套，硅橡胶密封套、堆焊等，不锈钢密封套在沟槽加工后应与管端固定成为一体，不应脱落。不锈钢密封钢套可由不锈钢和密封圈组成。防腐措施应能将整个管端与水接触部位包裹，彻底解决基管端面与水接触而产生电化学腐蚀的问题。连接所用5.4法兰连接2现场配接法兰时，应采用连接方式转换的方式进行，符合本技术规程3.4.44连接法兰的螺栓应使用相同规格，而且安装方向应一致，螺栓应从钢管对称工厂进行制作，在施工现场一次性进行安装。不应在施工现场在复合钢管上焊接法5.5焊接连接//5.5.3焊接坡口应采用机械加工方法，出厂管端坡口应满足30°~35°,对接焊65°±5°5) ) 321115.5.4焊前应采用机械方法及有机溶剂（如丙酮、酒精、香和焊接坡口两侧应不小于20mm范围内的油污、锈迹、氧化膜及其他污物。钢管对层材料的填充焊丝或焊条，都应为焊接复层材料对应的焊丝和焊条材料。应采用比5相同强度等级的碳素钢、低合金钢相焊的焊接材料应保证焊缝金属的力学性6对于有防晶间腐蚀要求的焊接接头应采用熔敷金属中含有稳定化元素Ti、5.5.7当设计施工技术条件要求进行焊接工艺评定时，在焊度不宜大于150℃;对奥氏体-铁素体双相不锈钢，复层焊接层间温度不宜大于1封焊时应注意观察熔池，如果发现熔池由里往外冒气泡，或是发生爆裂时，1先焊复层，再焊过渡层，最后焊基层。对于大口径管道，焊工在管内进行对对管口进行加热，使其水蒸气和空气尽可能排出，然钢基层。在打底焊结束后，采用不锈钢刷或角向5.5.11打底焊（根焊）和内盖2焊接电流应合适，一般控制在80A～100A；过小的电流容易造成未焊透，3对于打底焊的缺陷，通常需要将焊道磨穿才能将缺陷清除。如果打底焊返修1过渡层焊接时，过小的电流容易造成层间未焊透及熔敷金属合金浓度梯度过大，过大的电流易将根部或封焊层烧穿；焊接过渡层时，应采用较小直径的焊条或2过渡层的厚度不小于2mm，过渡层焊接时可采用复层焊接材料或打底焊材5.5.13外盖面焊缝控制焊缝余高5.5.17与管道连接的弯头、三通、异径管（4焊接连接时，管端在出厂时应进行封焊或堆焊，且对接焊缝内壁不能露出碳6对内衬（覆）不锈钢复合钢管主管需连接支管时，应采用能确保复合管端面7管道系统的支承体、紧固件应采用热浸镀锌金属件或碳钢件加防腐漆；沟槽5.6.2运输和安装过程中损坏的防腐层、管道连接部位联聚乙烯热收缩带、辐射交联聚乙烯补伤片、无溶剂液体涂料、聚合物胶粘带或弹6.0.1内衬（覆）不锈钢复合钢管管道工程应按现行国家标6.0.2中间验收、竣工验收前施工单位应进行自检。验收时1焊缝无损检测按照现行国家标准《金属熔化焊焊接接头射线照相》GB/T2焊缝的无损检测的检测范围及合格标准，应符合设计图纸和技术条件规定，3试验管段所有敞口应封闭，不得有渗漏水现象；试验管段注满水后，宜在不6.0.5管道试压合格后，应将管道系统内的存水放空，放空时应开启进气孔，并进行管道清洗。输送生活饮用水和饮用净水的管道还应消毒。消毒后的管道通水水质12341234过的钢材表面和全面清除原有涂层后的钢材表面的锈蚀等级和处理等级》GB/T8923.1的规定，目测或样板对比评定钢管涂装前表面除锈质量。目测或用五倍放大D——钢管的公称外径，单位为毫米（mmK——不同标准规定的许用应力和上屈服强度的比例，详见表A.1-2；H——高温下许用应力与室温下许用力相比的下降系数，详见表A.1-3。下屈服强度*ReL（MPa）--D>508mm表A.1-3高温下许用应力与室温下许用力相比的下降系数H下降系数H1≤200℃≤300℃含Cl-水含Cl-水— 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