If contamination of hydraulic oil occurs, it can have an adverse effect on performance. Connect the flushing hose to the upstream half of the driverside angle ram quickdisconnect fitting. Standard hydraulic piping flushing procedure sawyer systems llc. Place the free end of the flushing hose in the used fluid container. To ensure that each stage of the procedure is followed, please check off each action as it is finished. Provide flow measurement in flushing water supply line to be used as basis for verification of flow velocities in piping system.
A comprehensive flush procedure should include all piping circuits, including spool pieces, rundown tanks, and coolers. 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. Re pipe cleanings gas blow are performed to scour and clear the gas lines of debris, scale, foreign objects and weld spatter. Take first gas sample using vacuum tube and plastic bag 10. Cess gas cylinder attach nitrogen purge to v1 valve one. In used systems, the emphasis is on the removal of contaminants that are generated during. Gas lines are cleaned to the specification of the combustion turbine manufacturer, and verified with targets to assure the effectiveness of the cleaning process. The new method for the flushing of pipe networks which will replace. Contractor shall remove all strainer screens prior to flushing all systems. Systems standard hydraulic piping flushing procedure sfpsflush0 page 3 of 6 prepared by. Standard practice for cleaning, flushing, and purification. This picture shows the workspread used, as well as one of the well protector platforms. Since we have ft of 12 inch pipe, were talking about 5,875 gallons of water that needs to be displaced. If applicable, disconnect your water supply from the water softener and all other treatment devices prior to the start of flushing.
Flushing of the water mains is done initially to remove any debris or dirt left in the pipe after installation. Whether it is new construction of lube oil, fuel oil piping and hydraulic tubing systems or flushing services. 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. Procedures for flushing water systems after a drinking. Flushing and disinfection of hot and cold water systems. All pipe sizes have been matched with a recommended nonwelded connection technology while fulfilling classification society standards. Flushing procedure manuel the flushing of the entire system can be done by a simple flush gun and some high evaporative flush. Proper system flushing international district energy. Water treatment and flushing uw facilities university of.
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. This procedure covers the minimum technical requirements for cleaning and. Screwed pipework unless otherwise stated on approved drawing or specifications, pipe threads shall conform to asme b1. The diameter of this pipe shall be at least of the diameter of the main hydronic lines. See step 3 page 2, or appendix a page 3 for water softeners or. 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. Summarised below are a selection of low toxicity packages. The tables give basic information for normal standard pipe sizes with flow and pressure. 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.
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. 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. The pipe system shall be first flushed for at least. Flushing machines are available for sale or rental. Hook up sampling hose at receiving threadolet location. Method of statement for cleaning flushing and passivation. Section 6 pipeline flushing, hydrostatic testing, and. The chosen seals, valves and hoseassemblies are the ones. Astro pak provides high velocity oil flushing services in conjunction with our pickling and passivation services for lube oil piping. 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. During chemical flushing thin layer of surface of pipe wall will remove as well all the unnecessary contamination. Water main flushing moves water systematically through sections of a drinking water distribution system, creating a scouring action to clean the line.
High velocity oil flushing services onsite astro pak. Any proper flush operation includes moving water at a high flow velocity. Fabrication, erection and installation procedure for piping revision no. 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. University of washington mechanical facilities services water. Installation of sprinkler heads will be done after pipe work flushing is completed.
Place the valve control in the angle right position. Flushing water supply shall have sufficient capacity to produce a flow velocity of 6 fts in largest pipe size with pipe full. A successful test result will indicate the absence of total e. 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. Flushing pressure shall not exceed maximum operating pressure specified in pipe codes. The contractor shall also remove or cap the temporary bypas to a permanent configurationto allow future cfw when flushing is complete and approved water chemistry is achieved. Procedures for flushing water systems after a drinking water. A really new method which really has forwarded pipe flushing by a quantum leap.
Water main flushing faq for consumers what is water main flushing. Use the above mentioned container to collect the flushing fluid and dirt that comes out. Pipetap connections, where required, shall be drilled through the pipe wall and be smooth inside. Flush from the highest elevation to the lowest, where possible following the normal flow direction of the system. Flush about a pint of fluid through the flushing hose, or until no contaminants. Flushing guidance for premise plumbing and service lines to avoid. Standard practice for cleaning, flushing, and purification of. 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. The purpose of this procedure is to remove air and moisture from the gas lines before. Flushing is a critical step in the hydraulic piping procedure as it ensures the cleanliness of the piping. On gas piping, remove water from the entire systems after flushing and use the following pneumatic cleaning method to dry the system.
Nfpa 55 tia, cleaning and purging of gas piping systems. The increased flow rate scours the water pipes inner walls and helps to remove buildup of naturally occurring debris and. 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. In the event of a conflict with specific project requirements, the latter shall prevail. After final flushing, representative water samples will be taken by the wt sp for lab tests of coliform presence or absence. The pipe network will be flushed to ensure that the pipes are clear from debris ad other residual materials. University of washington mechanical facilities services. Piping and vessels flushing and cleaning procedure slideshare. Guide to flushing and precommission cleaning of pipework. 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.
The basics of high velocity oil flushing clark reliance. 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. Drain should be connected to main drainage line or as directed by authorities. Unless specified otherwise, the tap shall be made at the top of pipe. The purpose of chemical flushing is to remove any dirts, debris, oil, grease, rust, scale, ect form the pipelines.
Fill the system with clean water and drain the water after 30 minutes of circulation. Method of statement for cleaning flushing and passivation of. In new systems, the emphasis is on the removal of contaminants introduced during the manufacture, storage, field fabrication, and installation. Flushing will continued until clear water at the drainage side is observed. Divert flow from overboard to flushing head using inline block valves. 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. Flushing shall be performed through fully open flanges andor open pipe ends. The purpose of this section is to give further guidelines to the company construction specialists, for the procedure to be followed for flushing. Mechanical cleaning shall be used for vessels manual cleaning but also for large.
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. When flushing is completed, dewater the system and dry as soon as possible. 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. 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. After installation is completed, the distribution system should be maintained by flushing at a minimum frequency of once per year. The disinfection and flushing measures taken prior to putting the pipe into service. Determine the time needed to flush the sample line using the procedure on page 6 i.
Duke university construction standards 2019 q1 section 23 21 page 5 5 4. With the new impulse flushing method which challenges everyone to rethink things. Certification files for all pressure relief valves, test gauges, and particle counter. Flushing through smaller openings, such as drains or vents, is not acceptable. Standard for the inspection, testing, and maintenance of. Upon close observation, the central facility platform is visible in the background. Sfpsflush4 sawyer systems standard hydraulic flushing.
The process has been successful if the free residual chlorine level is not less than 30ppm at the end of this period. 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. After this vertical pipe, the water was gravimetrically discharged into a 200 l storage tank for recirculation into the system. Flushing of hydraulic and lubrication oil systems is used to ensure that new rotating and. 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. The increased flow rate scours the water pipe s inner walls and helps to remove buildup of naturally occurring debris and. All threading shall be carriedout after bending, forging or heat treatment, but.
Pipe sizes are standardized to reduce the numbers of pipe sizes. 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. The basics of high velocity oil flushing clark reliance document. It is an essential maintenance process that is designed to extend the life of rotating. Arrangements for draining the flushed water to be made before starting the flushing process. Refer to 336300 underground steam and condensate system design guidelines. Install pipe discharge line with meter from receiving end to storagereceiving tanks or to production process equipment. Piping and vessels flushing and cleaning procedure. Oil sampling the single most important preventive maintenance procedure is regular oil sampling and analysis. Pipe tap connections, where required, shall be drilled through the pipe wall and be smooth inside. Thoroughly flush the system to remove any flux residue, swarf or other.
813 403 81 613 276 458 87 9 491 1416 975 738 1143 474 597 432 918 816 1062 985 716 148 893 1193 422 1010 1101 602 828 1116 377 786 382 259 1438 35 447 330 608 531 1345 120 931 309 1367 231 815