Maintenance Engineering

JELLALI Mohamed

** *********** ******, **** ******

**** ******, *****

Phone: 002**-**-***-***

Email: acr3ac@r.postjobfree.com

CURRICULUM VITAE

WORK EXPERIENCE From October, 2010 - until now:

Mechanical engineer at Tunisian chemical group (Groupe Chimique Tunisien)

-Management and organization of the turbo-machinery and rotating equipments division of the plant mechanical maintenance department.

Accountabilities:

TURBO MACHINERY EQUIPMENTS

-Assessment and planning of Major and minor periodic overhauls, retrofit of machine trains

(high speed turbo-compressors TBs and turbo-generator TG sets) during regular downtimes with the technical support of the equipment manufacturers such as ALSTOM power service, Thermodyn-GE, Howden, FLENDER-Graffenstaden and JEUMONT Electric. Exp. Expertise of machinery elements (rotors, casings and other machinery components). Restoration, mounting and adjusting of steam turbines, compressors and generator rotors for turbo-generator and turbo-compressors sets. Modification and retrofit of turbines and gearboxes rotors for new disc-elements couplings adaptation. Machines disassembly, repair, reassembly and adjusting\tuning works, commissioning, start up, etc.

-Development and check of end performance specifications requirements CPT (objects, technical specifications, work scope extents, inspections and controls, documentation, etc.) relative to the works and supplies for planned major and minor overhauls.

-Development and check of general technical specifications requirement CCT (foreword, condition of participation, provision / realization, deadlines, commissioning, guarantees, penalties, payment, etc.) relative to the needs for planned maintenance (supplies and services) and retrofit.

-Negotiation and approval of specifications in collaboration with the relevant committees related to the company’s engineering and procurement divisions.

-Participation in the technical and financial bids evaluation.

-Contract enforcement and assistance to shop testing according to the contract terms and other relative standards in contractors or equipment manufacturers’ workshops. Exp. shop balancing, overspeed testing, mechanical performances testing, etc.

-Commissioning, writing of correspondences and end of works reports, timesheets check and signature. Exp. New turbo-compressors’ lub oil systems and gland steam condensers commissioning with TMS

(turbomaschinenservice) Gmbh, turbo-generator new gearbox commissioning with FLENDER Granffenstaden and FGGS.

-Preparation of general and special technical specifications requirements (objects, technical specifications, work scope extents, diagnosis equipments and reporting) relative to enhanced machine trains conditions monitoring and assessment works with the aim to identify malfunctions for any future maintenance operations planning needs. Exp. conditions assessment and diagnosis conducted by GE-measurement & control by use of Bently Nevada ADRE408 standalone multichannel dynamic analyzer for machines faults (Exp. rotors bow, cracks, rubs and other fluid and oil induced instabilities) diagnosis.

-Coordinate with the equipment manufacturers and contractors for the urgent and special needs in terms of machines’ parts purchase and of repair works for machine trains rehabilitation. Exp. steam turbines junction planes repairs (surfaces preparation, surfacing, machining and heat treatment), etc.

-Direct, oversee and provide guidance and support during routine assets shutdowns, such as:

Machines inspections (steam turbines, gearboxes, compressors, and generator). Exp. Inspection and controlling of machines’ sets and subset (journal bearings, thrust bearings, servomotors, steam inlet valves, stop valves, speed regulator, couplings, gears, compressors sealing systems etc.).

Hot and cold tuning and checking of machines’ adjustments. Exp. Bearings’ clearances, probes gaps, gearbox teeth contact, backlash, soft foot, steam inlet valves adjustments, etc.

Lub oil systems maintenance. Exp. Oils tanks, gear and centrifugal oil pumps, accumulators, control valves, pipe systems, filters, water separators,, run down oil systems, coolers, etc.

Turbines’ casings and steam systems maintenance. Exp. piping and piping fittings servicing

(valves, check valves, safety valves, etc), welding works and pipes flushing, heat insulation, etc.

& other tasks. Exp. machines alignment (Laser and hand precision measuring tools (micrometers, dial indicators, calipers, gauge blocks, etc), pipes accosting), etc.

-Conduct vibration surveys, plots analysis and rotors balancing. Exp. Routes analysis, site-balancing.

-Supervise and cooperate with other maintenance teams (electrical and instrumentation teams) during electrical and instrumentation set up and troubleshooting operation. Exp. vibration measuring systems (probes, cables, proximitors, vibration monitors), temperature and pressure measuring systems, control cabinets, generator insulation, etc.

-Conduct and assistance in rotors maintenance and check works. Exp. journals check, collars and coupling hubs disassembly, reassembly and check, mechanical overspeed trigger system check and adjustment, etc.

-Inspect finished and ongoing works to assure job quality, including off-site work performed by vendors or contractors at their facilities.

-Development and sketching of technical details of any necessary improvements and repairs during the adjustment operations and reassembly of sets and subset of turbo-machinery.

-Assistance in mechanical parts and rotors non-destructive examinations. Exp. rotor journals crack penetrant testing, rotors deflection check, run-outs check, gears cracks check with fluorescent magnetic particle testing, etc.

-Assistance in shop-balancing works. Exp. gears’ LS and HS shafts balancing, coupling and couplings’ parts balancing, etc.

-Monitor of the turbo-machinery maintenance proceedings compliance with the manufacturers’ technical requirements and other best practices.

-Contribute to the company’s CMMS. IVARA Asset management software. Others achievements:

-Purchase, planning and installation of new disc-elements low speed LS and high speed HS couplings for the turbo-compressors sets.

-Design and construction of the new oils units for turbo-compressors sets (oil tanks design improvement, oil units removal from inside the machines building, oil connections to new oil units design, etc.). Other ongoing projects:

-Upgrading and modernization of steam turbines control systems for turbo-compressors sets

Sequential controls, alarms and security control logic upgrade from hardwired relay to programmable logic controls PLC with standard communication interfaces connecting redundantly with operator stations, plant SCADA and distributed control system DCS.

Replacement of old hydraulic woodward PG-PL speed controllers with new fully digital systems.

Install of electric actuators and double acting hydraulic cylinders instead of old fully hydraulic servomotors SVM with use of independent and separate oil systems.

Upgrade and install of new local (machinery spaces) and remote (control rooms) control cabinets with standard communication interfaces connecting with plant SCADA and distributed control system DCS.

Install of overspeed SIL certified redundant security modules.

Upgrade and replacement of hydraulic combined trip systems.

Local and remote human machine interfaces HMI and other control panels install.

Etc.

-Purchase and installation of new complete compressors packages for turbo-compressors sets.

-Purchase and implementation of rotating machinery condition monitoring software platform.

& OTHER VARIOUS ROTATING EQUIPMENTS

Boilers feed water pumps & other different pumps. Exp. sea water pumps, circulating pumps (sulfuric acid and phosphoric acid pumps), sulfur guns feed pumps, etc.

Screw compressors.

Process fans. Exp. phosphate reactors’ induced draft fans, boiler air supply fan, etc.

Mixers and mixers drive.

2009 – 2010:

Project engineer at Sbf / EPC (engineering, procurement & construction) Accountabilities:

-Prepare, schedule, coordinate and monitor the assigned engineering projects.

-Monitor compliance to applicable codes, practices, QA/QC policies, performance standards and specifications.

-Interaction with the client to interpret their needs and requirements and represent them in the field.

-Perform overall quality control of the work (budget, schedule, plans, and personnel’s performance) and report regularly on project status.

-Cooperate and communicate with project manager and other project participants to provide assistance and technical support.

-Review engineering deliverables and initiate appropriate corrective actions. EDUCATION 2006 – 2009:

Mechanical engineering studies at National Engineering School of Tunis (ENIT). Mechanical engineering diploma.

2004 – 2006:

Preparatory studies at Preparatory Institute for engineering studies of Nabeul (IPEIN). High engineering schools admission certificate.

SKILLS Turbo machinery Repair and overhaul, Steam turbines (back pressure and condensing steam turbines), compressors, generator, gearboxes, fans, turbo machinery installation, control systems, Lubrication oil Systems, control systems, condition monitoring, vibration analysis, balancing, instrumentation, design, commissioning, project management, API Stds 611; 612; 613; 614; 617; 670; 671; 686, ISO Stds 7919, 10816. Other skills:

Piping, welding and machining.

& Computer skills:

-Modeling 3D, 2D: Catia v5r19, Autocad.

-Motion simulation: Catia v5r19.

-Manufacturing: Catia v5r19.

-FEA (Finite elements analysis): Catia v5r19.

-Planning: MS project.

-CMMS: IVARA asset management system.

LANGUAGES Arabic : mother tongue.

French : fluent; spoken and written.

English : fluent; spoken and written.

German : beginner.

PERSONAL ATTITUDES Autonomous, dynamic, good learning abilities, innovative, appreciate team-work. INTERESTS Sports, science and travel.

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