Installation of air-conditioning water system pipes in clean room workshops
Installation of air-conditioning water system pipes in clean room workshops
Pipe installation in clean room should be based on the principle of pressure pipe, no pressure pipe, small pipe and big pipe. , It should be cleaned before installation, and degreasing treatment should be carried out for oil-free pipelines before installation;...
Text label: clean room plant installation, air conditioning water system piping
Clean room pharmaceutical cleanroom air conditioning water system piping installation
Pipe installation in clean room should be based on the principle of pressure pipe, no pressure pipe, small pipe and big pipe. , should be cleaned before installation, and degreasing should be carried out for oil-free pipelines before installation; all kinds of pipes and valve parts should be inspected to pass the inspection, and there should be no defects such as blisters, cracks, heavy skin, interlayer, severe corrosion, etc. in the appearance inspection; clean room pipes The cutting size should be the actual size measured on site. The cutting methods include manual cutting, mechanical cutting, and oxyacetylene flame cutting. Pipes with a nominal diameter less than or equal to 50mm should be cut by hand or with a cutter. The cut surface of the pipe should be flat and there should be no cracks. , Heavy skin, burrs, convex and concave, iron oxide, iron filings, etc. should be removed, the incision surface inclination deviation should be 1% of the pipe diameter, but not more than 3mm; pipes and pipe fittings should be cleaned before installation. When the pipeline installation is interrupted, the open nozzle should be closed in time.
Between the hot and cold water pipes and the support and hanger, there should be a thermal insulation pad, the thickness of which should not be less than the thickness of the thermal insulation layer, the width should be greater than the width of the support surface of the support and hanger, the surface of the pad should be flat, and the pad joint should be The gap on the surface should be filled; the bending radius of the pipe bending pipe should not be less than 3.5 times the outer diameter of the pipe, the cold bending should not be less than 4 times, the welding pipe should not be less than 1.5 times, and the stamping pipe should not be less than 1.5 times. Less than 1 times, the difference between the maximum outer diameter and the minimum outer diameter of the elbow should not be greater than 8/100 of the outer diameter of the pipe, and the thinning rate of the pipe wall should not be greater than 15%; When it is greater than 1MPa, the threaded connection of plastic-coated welded steel pipe can be used, and the connection depth and torque with the pipe fittings should meet the regulations; when the working pressure of the system is 1-2.5MPa, the flange connection or groove type of plastic-coated seamless steel pipe can be used. The connection and pipe fittings are all seamless steel pipe plastic-coated pipe fittings; if the main pipe is fixed by elevators, before installing the pipes, the elevators in the trench or ceiling must be put on the profile steel in the order of slope direction, and the pipelines must be installed. First put the elevator on the pipe according to the card distance, lift the elevator, adjust the length of the elevator according to the slope, then put on the bolt and nut, and install the pipe; when installing the pipe on the bracket, put the pipe first. On the bracket, put the first tube on the U-shaped clip before installing the tube, and then install the second tube, and do the same for each tube section. Zhongjing Global Purification can provide clean room and clean pharmaceutical cleanroom consulting, planning, design, construction, installation, transformation and other supporting services.
The installation procedure of the welded connection pipe in the clean room is the same as that of the wire connection pipe. Starting from the first section of the pipe, straighten and smooth the pipe, so that the direction of the opening is the same, aligning with the nozzle, and it can be fixed by electric welding after straightening. Then the welding is officially carried out; the installation of the pipeline should start from the entry point or branch point. Before installation, check whether there is any debris in the pipe, apply lead oil at the wire head, and wrap the hemp wire. One person is leveling the pipe at the end, and the other Fix the first section of the pipe relatively at the interface, align it with the thread, and slowly turn the thread according to the natural taper of the thread. When it cannot be turned by hand, use a pipe wrench to bite the pipe fitting, and use another pipe clamp to put on the pipe. , the tightness is moderate, it is better to expose 2-3 buckles, and finally remove the hemp head; after the pipeline is installed, first check whether the coordinates, elevation, diameter, tee, slope position, etc. are correct, check with a level ruler, and compound the slope. After passing, fix the pipe firmly.
Before installing the branch pipe, check the installation position of each equipment and the elevation and position of the reserved opening of the riser, and make a record; the fan coil unit and the inducer should be connected with a flexible connection, and when the flexible short pipe comes with a looper connection, Unions shall not be used, otherwise they should be increased; check the slope of the branch pipe and the size of the distance from the wall with a steel ruler, a spirit level, and a wire drop, re-check whether the riser and equipment have moved, and fix the pipe and plug the gap in the wall hole after passing the test; When installing, first check and review whether the reserved holes and casings of each layer are on the same straight line; check whether the elevation and angle of each reserved opening of the riser are accurate and flat, and put the pipe into the riser pipe after confirmation. Tighten, and then fill the copper pipe gaps or reserve holes. The reserved nozzles will not be constructed for the time being, and protective measures must be taken.
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