Standard practice for cleaning, flushing, and purification. Flush from the highest elevation to the lowest, where possible following the normal flow direction of the system. Drain should be connected to main drainage line or as directed by authorities. If applicable, disconnect your water supply from the water softener and all other treatment devices prior to the start of flushing. Flush the pipe between the d side of the compressor and the inlet of the condenser flush both in the flow direction and opposite the flow direction. Piping and vessels flushing and cleaning procedure slideshare. The purpose of chemical flushing is to remove any dirts, debris, oil, grease, rust, scale, ect form the pipelines. Any proper flush operation includes moving water at a high flow velocity. Whether it is new construction of lube oil, fuel oil piping and hydraulic tubing systems or flushing services.
Procedures for flushing water systems after a drinking. The disinfection and flushing measures taken prior to putting the pipe into service. Unless specified otherwise, the tap shall be made at the top of pipe. Install pipe discharge line with meter from receiving end to storagereceiving tanks or to production process equipment. Based on the comment from the mechanical contractor, there is no way they reached the required velocity with a fire hydrant pushing water through a 16 pipe 1700 long. The basics of high velocity oil flushing clark reliance document. The process has been successful if the free residual chlorine level is not less than 30ppm at the end of this period.
Place the free end of the flushing hose in the used fluid container. Determine the time needed to flush the sample line using the procedure on page 6 i. Flushing will continued until clear water at the drainage side is observed. The increased flow rate scours the water pipe s inner walls and helps to remove buildup of naturally occurring debris and. Flushing through smaller openings, such as drains or vents, is not acceptable. The chosen seals, valves and hoseassemblies are the ones. Flushing is a critical step in the hydraulic piping procedure as it ensures the cleanliness of the piping. This procedure covers the minimum technical requirements for cleaning and. After this vertical pipe, the water was gravimetrically discharged into a 200 l storage tank for recirculation into the system. Screwed pipework unless otherwise stated on approved drawing or specifications, pipe threads shall conform to asme b1.
Mobil shc aware h and mobil shc aware hs series hydraulic oils introduction mobil shc aware h and mobil shc aware hs series hydraulic oils are engineered to protect hydraulic systems and components. All pipe sizes have been matched with a recommended nonwelded connection technology while fulfilling classification society standards. University of washington mechanical facilities services. Water treatment and flushing uw facilities university of. It is an essential maintenance process that is designed to extend the life of rotating. Nfpa 55 tia, cleaning and purging of gas piping systems. Pipe sizes are standardized to reduce the numbers of pipe sizes. Mar 23, 2015 the purpose of flushing and cleaning lines and vessels is to remove loose foreign matter, production residues and surface protection substances from the inside of line and vessels welding rods, sand, earth, pebbles, nuts and bolts, tools, rags, oil and greasy films, etc. The increased flow rate scours the water pipes inner walls and helps to remove buildup of naturally occurring debris and. The pipe system shall be first flushed for at least.
The purpose of flushing and cleaning lines and vessels is to remove loose foreign matter, production residues and surface protection substances from the inside of line and vessels welding rods, sand, earth, pebbles, nuts and bolts, tools, rags, oil and greasy films, etc. Provide flow measurement in flushing water supply line to be used as basis for verification of flow velocities in piping system. Standard practice for cleaning, flushing, and purification of. With the new impulse flushing method which challenges everyone to rethink things. Piping and vessels flushing and cleaning procedure. Summarised below are a selection of low toxicity packages. Procedure for supply pipes, will be necessary to add furtherservice pipes and unvented hot water systems a small diameter plugged and valved branch needs to be fitted at the upstream end of the supplyservice pipe during installation to facilitate disin fection. Pex flushing procedure certification all installations of pex pipe where it is the initial plumbing piping installed in new construction shall be flushed twice over a period of at least one week.
Take first gas sample using vacuum tube and plastic bag 10. In used systems, the emphasis is on the removal of contaminants that are generated during. Flushing of hydraulic and lubrication oil systems is used to ensure that new rotating and. The tables give basic information for normal standard pipe sizes with flow and pressure. Divert flow from overboard to flushing head using inline block valves. The new method for the flushing of pipe networks which will replace. Ensuring that they perform as they should can be helped significantly by following the correct precommission cleaning and flushing procedures of the pipework systems at the prehandover.
The diameter of this pipe shall be at least of the diameter of the main hydronic lines. Installation of sprinkler heads will be done after pipe work flushing is completed. Section 6 pipeline flushing, hydrostatic testing, and. Contractor shall remove all strainer screens prior to flushing all systems. Standard for the inspection, testing, and maintenance of. Water main flushing faq for consumers what is water main flushing. The basics of high velocity oil flushing by john bonner, director of field services, oil filtration systems high velocity oil flushing hvof is performed to remove contaminants from the piping and tubing of critical hydraulic and lube oil systems. Use the above mentioned container to collect the flushing fluid and dirt that comes out.
Flushing machines are available for sale or rental. The type and amount of contaminant that may still enter the pipe s if the cause of contamination is not discovered and stopped, and extent of the spread of the contaminants into the distribution system from the points of intrusion. After installation is completed, the distribution system should be maintained by flushing at a minimum frequency of once per year. Mechanical cleaning shall be used for vessels manual cleaning but also for large. The purpose of this section is to give further guidelines to the company construction specialists, for the procedure to be followed for flushing. High velocity oil flushing services onsite astro pak. Duke university construction standards 2019 q1 section 23 21 page 5 5 4. Since we have ft of 12 inch pipe, were talking about 5,875 gallons of water that needs to be displaced. Oil sampling the single most important preventive maintenance procedure is regular oil sampling and analysis.
The purpose of this section is to give further guidelines to the company construction specialists, for the procedure to be followed for flushing operations prior to, and or, in preparation for hydrotesting. The hydrant sampler referred to in this procedure was designed to allow the hydrant valve to be fully open while collecting samples in a controlled, safe manner. Over 96% of all hydraulic failures can be traced directly to oil that has been improperly cared for. Astro pak provides high velocity oil flushing services in conjunction with our pickling and passivation services for lube oil piping. The main objective of flushing process is to remove, as much dirt and debris from the pipe works system as possible, in order to reduce the livelihood of the system blockage and create the best possible circumstances for successful chemical clean and subsequent water treatment regime. Whether it is new construction of lube oil, fuel oil piping and hydraulic tubing systems or flushing services to maintain equipment, we can perform the work. Sfpsflush4 sawyer systems standard hydraulic flushing. Pipe tap connections, where required, shall be drilled through the pipe wall and be smooth inside. Standard hydraulic piping flushing procedure sawyer systems llc. Oil flushing hydratight utilises inhouse designed flushing skids fs, which are selfcontained units that include an onboard pump, heater, mixing tank, reverse flow manifold, and filtration system to capture insoluble matter.
In new systems, the emphasis is on the removal of contaminants introduced during the manufacture, storage, field fabrication, and installation. Method of statement for cleaning flushing and passivation. The flushing pump is located on the jackup boat, and a hose connects the pump to the pipeline via a hose that runs across the gangway. Guide to flushing and precommission cleaning of pipework. A really new method which really has forwarded pipe flushing by a quantum leap. Flush about a pint of fluid through the flushing hose, or until no contaminants. Fill the system with clean water and drain the water after 30 minutes of circulation. Thoroughly flush the system to remove any flux residue, swarf or other. Re pipe cleanings gas blow are performed to scour and clear the gas lines of debris, scale, foreign objects and weld spatter. Pipetap connections, where required, shall be drilled through the pipe wall and be smooth inside. Proper system flushing international district energy. After final flushing, representative water samples will be taken by the wt sp for lab tests of coliform presence or absence. Connect the flushing hose to the upstream half of the driverside angle ram quickdisconnect fitting.
In the event of a conflict with specific project requirements, the latter shall prevail. This picture shows the workspread used, as well as one of the well protector platforms. Flushing procedure manuel the flushing of the entire system can be done by a simple flush gun and some high evaporative flush. When flushing is completed, dewater the system and dry as soon as possible. Arrangements for draining the flushed water to be made before starting the flushing process. Flushing pressure shall not exceed maximum operating pressure specified in pipe codes. The basics of high velocity oil flushing clark reliance. The type and amount of contaminant that may still enter the pipes if the cause of contamination is not discovered and stopped, and extent of the spread of the contaminants into the distribution system from the points of intrusion.
Flushing water supply shall have sufficient capacity to produce a flow velocity of 6 fts in largest pipe size with pipe full. This way is fully acceptable and in many situations better than flushing in a closed loop where the dirt will simply just be flushed around in the entire ac system. Gas lines are cleaned to the specification of the combustion turbine manufacturer, and verified with targets to assure the effectiveness of the cleaning process. Upon close observation, the central facility platform is visible in the background. Place the valve control in the angle right position. If contamination of hydraulic oil occurs, it can have an adverse effect on performance. Systems standard hydraulic piping flushing procedure sfpsflush0 page 3 of 6 prepared by. Fabrication, erection and installation procedure for piping revision no. A successful test result will indicate the absence of total e. All threading shall be carriedout after bending, forging or heat treatment, but. Flushing of the water mains is done initially to remove any debris or dirt left in the pipe after installation. University of washington mechanical facilities services water. Corporation curb stop taps used for flushing, pressure testing, and disinfecting shall comply with service tap requirements for ductile iron pipe or c900 pvc pipe. Flushing guidance for premise plumbing and service lines to avoid.
To ensure that each stage of the procedure is followed, please check off each action as it is finished. Water main flushing moves water systematically through sections of a drinking water distribution system, creating a scouring action to clean the line. Certification files for all pressure relief valves, test gauges, and particle counter. During chemical flushing thin layer of surface of pipe wall will remove as well all the unnecessary contamination. A comprehensive flush procedure should include all piping circuits, including spool pieces, rundown tanks, and coolers. See step 3 page 2, or appendix a page 3 for water softeners or. Given the variety of hydraulic systems, it is important that the relevant professionals are present at a very early stage to set the right goals for the level of purity. Apply the ptfe tape only to the male portion of the sprinkler and install the upright sprinkler head using the wrench provided by the manufacturer, and in such a way that the arms are parallel to the branch pipe. The purpose of this procedure is to remove air and moisture from the gas lines before.
Refer to 336300 underground steam and condensate system design guidelines. The pipe network will be flushed to ensure that the pipes are clear from debris ad other residual materials. Procedures for flushing water systems after a drinking water. On gas piping, remove water from the entire systems after flushing and use the following pneumatic cleaning method to dry the system. Hook up sampling hose at receiving threadolet location. Flushing and disinfection of hot and cold water systems.