机电工程安装的管道部分 Piping part of electromechanical engineering installation

　　机电工程安装管道部分包括给排水安装。在施工过程中，应随时与土建、电气负责人协调配合，避免配合不当影响进度。管道、吊架组对时，应随土建提前预埋或预留孔洞。

　　除特殊情况外，墙体或混凝土部分应在业主同意的情况下进行切割和修补，不得留下任何痕迹。业主提供和业主提供的所有设备在运至机电工程安装施工现场前，必须经过现场监理的检查和批准。

　　如果规格不一致，应统一更换。设备运至机电工程安装施工现场后，由专人妥善保管。所有材料未经允许不得露天存放。机电工程安装所越的墙板、屋面时，套管安装及预埋应准确、牢固。机电工程安装在墙上的管道应预留墙槽。小直径钢管采用切割机或型材切割机切割。
　　大口径钢管采用氧乙烯火焰切割，型材必须用型材切割机切割。铸铁管的切割有三种方法，如手用钢锯、型材切割机和刹车斧。PE和PEX管用专用工具切断。型钢下料后，切口应平直、管道螺纹接头，螺纹间应按下列要求加填料。

　　机电工程安装对于冷水管，填充物为细麻布，并涂有加厚的白色涂料。缠绕时，应沿螺纹缠绕3-4层填料，不得将填料压入管内。8钢管对焊时，管口应倒角。电弧焊适用于小直径钢管。较大管径应焊接。焊后应清除焊渣，并修补外观检查中的缺陷。水压试验合格后，对焊缝进行防腐处理。

　　并且支吊架制作时，在型钢上采用机械钻孔和冲孔的方法开孔。不允许使用氧乙炔火焰切割或电弧冲孔。孔径应比螺栓直径大1-2mm。施工准备前的技术准备：各专业工长应认真熟悉施工图纸，做好图纸会审等相关内容的准备。收集施工所需的规范、标准图纸，编制作业指导书、技术交底和工程质量计划。准备施工所需的计量器具。并且 施工场地准备：施工用水、用电及加工场地、办公场地、材料仓库由总承包方规划并提供。 机械准备：施工人员进场后，将机具运至现场，按施工计划定位，然后才好顺利的完成机电工程安装。

　　The piping part of electromechanical engineering installation includes water supply and drainage installation. In the construction process, it should be coordinated with the civil construction and electrical person in charge at any time to avoid improper coordination to affect the progress. Pipes and hangers should be pre-buried or pre-drilled in advance with the civil construction when they are grouped together.

　　Except for special circumstances, wall or concrete parts shall be cut and repaired with the consent of the Owner without leaving any traces. All equipment supplied by the Owner and provided by the Owner shall be inspected and approved by the Site Supervisor before being transported to the construction site for E&M installation.

　　If specifications are inconsistent, they shall be uniformly replaced. After equipment is delivered to the MEP installation construction site, it shall be properly stored by specialized personnel. All materials shall not be stored in the open without permission. When wall panels and roofs are crossed by E&E works installation, casing installation and pre-burial shall be accurate and firm. Wall grooves shall be reserved for pipes installed on the wall for E&M works. Small diameter steel pipe is cut by cutting machine or profile cutting machine.
　　Large-diameter steel pipes are cut by oxyethylene flame, and profiles must be cut by profile cutter. There are three methods for cutting cast iron pipes, such as hand hacksaw, profile cutter and brake axe.PE and PEX pipes are cut with special tools. After the profile is discharged, the cut should be straight and pipe threaded joints, and the threads should be primed between them according to the following requirements.

　　Mechanical and electrical engineering installation For cold water pipes, the filler is fine burlap with thickened white paint. When winding, 3-4 layers of filler should be wound along the threads, and the filler should not be pressed into the pipe.8 When butt-welding steel pipes, the pipe opening should be chamfered. Arc welding is suitable for small diameter steel pipes. Larger pipe diameters should be welded. Welding slag should be removed after welding, and repair the defects in the appearance inspection. After the water pressure test is qualified, the weld is treated with anticorrosion.

　　And when the support hanger is made, the holes are opened in the steel section by mechanical drilling and punching. Oxyacetylene flame cutting or arc punching is not allowed. The diameter of the hole should be 1-2mm larger than the diameter of the bolt. technical preparation before construction preparation: each professional foreman should carefully familiarize with the construction drawings, and make preparations for the drawing review and other related contents. Collect the norms and standard drawings required for construction, and prepare work instructions, technical instructions and project quality plan. Prepare the measuring instruments required for construction. And construction site preparation: construction water, electricity and processing site, office space, material warehouse is planned and provided by the general contractor. Machinery preparation: after the construction personnel enter the site, the machinery and equipment will be transported to the site and positioned according to the construction plan, and then it will be good to complete the installation of electromechanical works smoothly.