Hot Tapping And Line Stopping - Furmanitehk

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Furmanite IPSCOSpecialist Hot Tappingand Line Stoppingtechniquescost effective pipeline modificationand repair without the need forshutdown

Hot TappingHot Tapping is a specialist technique employed by Furmanite IPSCO for making a connection to piping or vessels while the system is operating under pressure. Our vast experiencein pipeline intervention techniques, our trained and skilled work force, considerable inventory and our global reach makes us the prime technical resource for pipeline modificationand repair under high pressure, large diameter or subsea. Industries where our expertisehas been successfully deployed include oil exploration and production (both topside andsubsea), refineries and petrochemical plants, gas, power generation and utilities such aswater and waste, in fact any industry where continuous process is paramount.Furmanite IPSCO’s range of specialist engineering services and patented technologies, together with project planning capability and on-site management ensure that uptime is maximised36” hot tap cutter, coupon and pilot drilland assets keep earning.Hot Tapping is a procedure using an under-pressure drilling machine to cut a hole in an operating pipeline to facilitate a new branch connection from the original pipe or vessel. Theprocess is undertaken with no loss, leakage or interruption to flow.Furmanite IPSCO manufactures and operates a complete range of equipment to carry out hottaps from 1/2” (ND 13 mm) to 72” (ND 1800 mm) at pressure ratings up to 1480 psi (102 bar)and temperatures up to 370ºC (700ºF).Typical hot tap procedure involves a fitting designed tocontain system pressure, a valve to control the new connection and a hot tap drilling machine.Removal of coupon8” (200mm) hot tap line stop operationand 2” (50mm) equalisation tapBasic procedure! Install fitting and valve on existing pipeline! Install hot tap machine! Perform hot tap through the open valve(special device retains the ‘coupon’removed during the operation)! Cutter assembly retracted! Hot tap valve closed! Hot tap machine removed to allowconnection to new pipe236” coupon showing bracing support

Basic procedure! Install line stop fitting and hot tap pipeLine Stopping(see basic Hot Tap procedure)Line stopping is a specialistprocedure that temporarily stopsflow within an operating pipeline.The technique can be used toisolate piping systems forrepair, alteration, or! Line stop equipment is installed on thetemporarytapping valve and the valve is opened! Line stop head enters the pipelinethrough the hot tapconnection! Temporary seal is achieved andrelocation. When used inpipeline flow is stoppedconjunction with bypass Installation of sealing element 6” (150mm)lines product flow can be pivoting headmaintained around the isolated section of the pipe ensuring thatproduction is uninterrupted while the section of pipeis repaired or system modified.! Repair, alteration or relocation is per-formed! Line stop head is removed from thepipe via the hot tap connection! Temporary valve is closed and the linestop equipment is removed! Completion plug is installed on the tap-ping machine! Tapping machine is installed on thetemporary tapping valve! Valve is opened, completion plug isinstalled in the branch of the line stopfitting and locked in position! Line stop equipment and temporary tap-ping valve are removed from the linestop fitting! Blind flange is installed on the line stopfittingLine stopping can require dedicated equipment to reflect the pipe size, pressure rating andtemperature of the media within the pipe. Furmanite IPSCO is able to address many challengesusing its extensive inventory, engineering expertise and years of experience in pipelineintervention.Folding head systemThe folding head line stop system, which utilises a reduced branchfitting, is another cost-effective method of line stopping. Thissystem is used in water/wastewater, transmission, oil, gas andpetrochemical industries, Sizes range from 8” (ND 200mm) to 72”(ND 1800 mm) with pressures up to 145 psi (10 bar). Larger sizesupon request.The prime advantage being that the equipment is lighter, morereadily transported to site and reduced workspace is requiredaround the pipe.48”(1200mm) folding head for crude oil line stopFolding head systemSequence of 36" (ND 900mm) folding head installed in steel cylinder reinforced concrete test pipe3

Line Stoppingcont’dSure-stop systemFurmanite IPSCO’s Sure-stop sealing is a well proven cylinder-wedge stopper method used bymany customers for its positive mechanical seal. Traditionally limited from 4” (ND 100 mm) to12” (ND 300 mm) pipe, this method is now available for larger diameter pipes, from 14” (ND350 mm) to 46” (ND 1150 mm).The positive mechanical seal provides two distinct advantages:! Sealing on the machine edge eliminates potential problems related to erosion/corrosion, internal pipebuild-up or out-of-roundness! The mechanically wedged seal allows new sections of pipe to be pressure tested betweenstoppers.20” (500mm) Sure-stop bottom-out fitting withcompletion plug installedHTP stopPositive sealing for high temperature and pressure pipe systemsDouble 20” (500mm) Sure-stop on natural gas linewith 14” (350mm) bypassThe HTP stop provides a metal-to-metal seal at the pipe face, eliminating problems fromerosion/corrosion, internal pipe build-up or out-of-roundness, creating a ‘block and bleed’system allowing modifications or valve replacement to be undertaken downstream. As thesealing surface is metal-to-metal, the line stop can be left on the line longer than elastomer sealswould allow.HTP stops are effective at temperatures up to 370ºC (700ºF) and pressure ratings up to 1480psi (102 bar).Sure-stop line stop head8” (200mm) HTP line stop on steam condensateline4

Typical Line Stop applicationsDouble-stop and bypass for valve insertionUtilising two fittings, the system flowis maintained through a bypass from14” (350mm) line stop with bypassone line stop machine to another.Once the line is isolated, drained andcut, the new valve is installed, thetemporary bypass disassembled, theline stop machines removed and theblind flanges are installed.Double-stop and bypass for permanent relocation using 3-way teesThis method of relocation uses aSpherical Tee line stop fitting with side outletfor permanent relocationlong branch nozzle with outlet or 3way fitting and shows how twofittings may be used instead of four.Permanent valves are not used andflow can be maintained while theplugging operation is on-going.The old section is plugged and endcapsinstalledforpermanentisolation, the plugging machineremovedandblindflangesinstalled.Line stop, equalisation and bypass fittings formultiple line relocationsDouble-stop and bypass for permanent relocationA typical pressure layout using twohot tap fittings with valves and twoline stop fittings for the installationof a new section of pipe.The Line stop machines are in placeand the flow is stopped in theoriginal line. The section of originalpipe is removed.The relocation is complete and theline stop machines are replacedwith blind flanges.5

Offshore and subsea applicationsFurmanite IPSCO’s global expertise is geared to serve the offshore sector’s specificoperational requirements both topside and subsea.Furmanite IPSCO understands that maintaining production and minimising disruption iscritical to the profitability of the operation. Furmanite IPSCO’s hot tapping and line stoppingtechniques are geared to share in this ethos.Subsea applications bring new and unique challenges due to the need for diver interventionand pressure variations at depth. Furmanite IPSCO is able to perform hot taps and line stopssubsea at depths up to 1,000 ft, including single line stops through to double line stops withbypass on high-pressure natural gas and crude lines.It is within this environment that Furmanite IPSCO has carriedout its largest double hot tap connection on a 36” highpressure gas line at 500 ft. Other projects have included adouble 20” line stop with 12” bypass on HP gas line at 700ft,multiple subsea hot taps and line stops off the coast of Egypt,as well as multiple hot taps to float a submerged fuel storagecell at 650 ft.914XL hot tap machine is lowered in toNorth Sea for 16” hot tapSummaryFurmanite IPSCO has considerable experience around theglobe working to tight timescales, mobilisation/demobilisationschedules, restricted space and potentially hazardousenvironments. Our current capability includes;! Subsea hot taps up to 36” Class 900! Subsea line stops up to 36”Our global reach includes! North Sea! Gulf of Mexico! Arabian Gulf! Red Sea! Gulf of Guinea (West Africa)914XL hot tap machine with hot tap fitting624” x 12” mechanical hot tap fitting,ANSI 600 for subsea application6” (150mm) line stop being evacuated andraised to the surfaceMechanical hot tap tee with hot tap machine fitted is lowered intoGulf of Mexico

Engineering, manufacturing andquality managementFurmanite IPSCO has an extensive engineering and manufacturing capability both in the UKand the US and is able to supply dedicated equipment such as hot tapping machines andancillary equipment for customer use, ranging from drilling and plugging machines, splitsleeve self-sealing clamps and contingency supplies. All customerrequirements are reviewed and validated to ensure that design codes,manufacturing tolerances and safety considerations are met and thatthe ISO9001 Quality Management System is maintained.48” (1200mm) line stop fitting with completion plug installed on crude lineFittingsFurmanite IPSCO manufactures split tees,shaped nozzles and close-sure line stopfittings in a variety of sizesandcombinations for hot/wet tapping and linestopping. Fittings are available for size-onsize or reduced branch applications fromThree-way line stop tee foruse on flare linesSpherical three-way teeoutlet from side or bottomMechanical line stop fitting withblind flange2” (ND 50 mm) to 60” (ND 1500 mm). Customdesigned fittings are available on request.Our fittings are designed and manufacturedin accordance with ANSI standards.Customer specific requirements can beconsidered upon request.EquipmentFurmanite IPSCO also manufacturers acomplete line of hot tapping equipmentfrom 1/2” (ND13 mm) to 72” (ND 1800 mm)and line stopping equipment from 4” (ND100 mm) to 72” (ND 1800 mm) with maximumSure Stop tee with bottom outletprepped for weldingTapping machine with capabilities from 13mm to 300 mmrating to 1480 psi (102 bar) at 100 F (38 C)700 psi (48 bar) at700 F (370 C). Wemanufacture a complete line of linestoppingequipmentwhichincludesactuators, pivoting heads, sandwichtype valves, sealing elements, cutters, pilotdrills and other related items. Individualequipmentspecificationsheetsandequipment packages are available tomeet your specific requirements and canPurge equalisation fittings(screw lock nipples)Split teeClose-Sure completion flangebe prepared on request.7

Optimise your assets by eliminatingunscheduled downtimeFurmanite’s skills and supportservices include;! CONTROLLED BOLTING (PSIM)Furmanite helps companies across all industries worldwide achieve maximum process! ON-LINE LEAK SEALINGefficiency and effective asset management - adding value not cost - bringing a breadth of! TRANSFORMER LEAK SEALINGexperience plus a raft of products and services, using the latest materials, techniques andtechnologies, and engineering dedicated solutions where required. All are designed toincrease process efficiency, extend production runs, minimise scheduled downtime, and! FURMASEAL- SELF SEALING REPAIR CLAMPS- PIPE END CONNECTORS! PIPELINE INTERVENTIONavoid unscheduled shutdowns.From working alongside an in-house maintenance team, or project-managing allmaintenance or specialist requirements, through to providing a full-time Furmanitetechnician or team on-site, Furmanite will work with its customers to meet theirrequirements.- HOT TAPPING- LINE PLUGGING- PIPE FREEZING- GROUTED TEES! VALVE REPAIR! TREVITEST ON-LINE VALVE TESTINGFor over 75 years, Furmanite has been the name behind innovative leak-sealing techniques,providing major players in the oil and gas, power generation, mining and petrochemicalindustries with an unrivalled level of expertise. On-call 24/7 for emergency repairs and! ON-SITE MACHINING! METAL DISINTEGRATION! SILK SPECIALIST MACHINESplanned shutdown support.Today, Furmanite is the world's preferred engineering partner, delivering on-line, on-siteengineering services and advanced patented technologies, saving companies millions ontheir bottom line by maximising asset uptime.! HEAT EXCHANGER MANUFACTUREAND REPAIR! TANK ROOF REPAIRS! SMART SHIM CONDUCTOR ANALYSISAND CHOCKINGFurmanite delivers! COMPOSITES REPAIRS AND! Support through asset life! Multi-skilled workforce! Project managing maintenance! Real cost savings on operationalschedulesbudgetsPRODUCTSFK 1284. FIL 08/07. KiT/2MFurmaniteAsia Ltd.Furmanite EastIPSCOE-mail:! PASSIVE FIRE PROTECTION! ENVIRONMENTAL/SAFETY! Permanent on-site presenceUnitsA & B,Intervention18/F, Nathan Tower,PipelineDivision518-520 Nathan Road, Kowloon, Hong KongSunningdale House, Sunningdale RoadTel: 852 2388 3366Scunthorpe DN17 2TY UKFax: 852 2388 5023Tel: 44 (0)1724 849 904 Fax: 44 (0)1724 861 033E-mail:

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