E&I Precommissioning job in Angola

https://www.oilandgasjobsearch.com/Oil-and-Gas-Jobs/Electrical-and-Instrument-Designer-Jobs/E-I-Precommissioning/Details/1052196?utm_source=job%2Balert&utm_medium=email&utm_campaign=job%2Balert%2Bemail

I&C Engineer job in Algeria

https://www.oilandgasjobsearch.com/Oil-and-Gas-Jobs/Engineer-Jobs/I-C-Engineer/Details/1052430?utm_source=job%2Balert&utm_medium=email&utm_campaign=job%2Balert%2Bemail

Types of logic block algorithms ( gates)

1. Null (NULL)
2. AND Gate (AND)
3. OR Gate (OR)
4. NOT Gate (NOT)
5. NAND Gate (NAND)
6. NOR Gate (NOR)
7. XOR Gate (XOR)
8. Qualified OR Gate with 2 inputs On (QOR2)
9. Qualified OR Gate with 3 inputs On (QOR3)

1. Compare Equal with Deadband (EQ)
2. Compare Not Equal with Deadband (NE)
3. Compare Greater then with Deadband(GT)
4. Compare Greater then or Equal with Deadband(GE)
5. Compare Less then  with Deadband(LT)
6. Compare less then or Equal with Deadband(LE)  

• Check for Bad(CHECKBAD)

1. Fixed size bulse(PULSE)
2. Pulse with maximum Time Limit(MAXPULSE)
3. Pulse with Minimum Time Limit(MINPULSE)
4. Delay(DELAY)
5. On Delay(ONDLY)
6. Off Delay(OFFDLY)
7. Watchdog Timer(WATCHDOG)
8. Flipflop(FLIPFLOP)
9. Change Detect(CHDETECT)       

How to restart the GUS station ?

• start
• log in- administrator 
• LCN P windows status  under  status  column  power-ON  wait for 2 min
• open native windows 
• select Load button on right corner screen 
• screen will show WN 1,2,3........  then type N then press enter 
• wait 1 min 
• system status will be on screen 

other option 

•      start - enter 
•   select  program 
• select Honeywell TPS
• select native window 
• select control
• then load

screen will show WN 1,2,3........  then type N then press enter 

then screen will show OPR, UND X..  then type O then press enter 

load in progress wait for 2min 

SIL ( Safety Integrity Level )

                    SIL is defined as a relative level of risk reduction provided by a safety function or to specify a target level of risk reduction. In simple terms SIL is a measurement of performance required for a instrumental function.

                     SIL is the functional safety standards based on IEC 61508, SILs are defined,with SIL 4 is the most dependable and SIL 1 is being the least.

                      There are several methods are used to assign a SIL, these are normally used in combination, and may include,
 1. Risk matrices
 2. Risk graphs
 3. Layers of production analysis(LOPA)                
   this 3 are normally used

SIL level chart :

PFD(probability of failure demand ) and RRF(Risk reduction factor )

For Low demand operation:
SIL         PFD                                   PFD(power)                   RRF
  1          0.1-0.01                            10-1 to 10-2                   10-100
  2          0.01-0.001                        10-2 to 10-3                   100-1000
  3          0.001-0.0001                    10-3 to 10-4                   1000-1000
  4          0.0001-0.00001                10-4 to 10-5                   1000-10000

For Continuous  Operation 
SIL         PFD                                                 PFD(power)                    RRF
  1          0.00001-0.0000001                          10-5 to 10-6                  100,000-1,000,0000
  2          0.000001-0.00000001                      10-6 to 10-7                  100,000-10,000,0000
  3          0.0000001-0.000000001                  10-7 to 10-8                  10,000,000-100,000,000
  4          0.00000001-0.0000000001              10-8 to 10-9                  100,000,000-1,000,000,000

ESD(Emergency Shutdown ) System

                 ESD shutdown is required to perform a safe process shut down (trip) if any of the unsafe conditions occur .

                  By the safety standard IEC 61508 the functions of an ESD and a process control system cannot be shared -- the safety system must be separate. 

Layers of Protection 

What is vibration?

                                     Mechanical vibration is the dynamic motion of machine components.

                            Vibration measurement is the measurement of this mechanical vibration relative to a known reference. In metric units peak to peak vibration displacement is usually expressed in microns,

            one micron equals one thousandth of a millimeter (0.001 mm).

            It is sometimes expressed in mils, where 1 mil = 0.001 inch

Jobs @ Petrofac – UAE l KSA l OMAN

Jobs @ Petrofac – UAE l KSA l OMAN
UAE - Vacancies
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KUWAIT AL_MEER JOBS

REQUIRE URGENTLY WITH MINIMUM EXPERIENCE OF 3 YEARS IN PROJECT CONSTRUCTION & INSTALATION WORKS IN OIL SECTOR IN GCC COUNTRIES.

1- PLANNING ENGINEER: DEGREE/DIPLOMA
2- MECHANICAL ENGINEER: DEGREE/DIPLOMA
3- ELECTRICAL ENGINEER: DEGREE/DIPLOMA
4- INSTRUMENT ENGINEER: DEGREE/DIPLOMA
5- QA/QC ENGINEER: DEGREE/DIPLOMA
6- CIVIL ENGINEER: DEGREE/DIPLOMA
7- MECHANICAL SUPERVISOR: DIPLOMA
8- ELECTRICIAL SUPERVISOR: DIPLOMA
9- INSTRUMENT SUPERVISOR: DIPLOMA
10- CIVIL SUPERVISOR: DIPLOMA
11- TECHNICAL ASSISTANT: DEGREE
12- DOCUMENT CONTROLLER: DEGREE
13- SAFETY OFFICER: DIPLOMA
14- INSTRUMENT TECHNICIAN: DIPLOMA / ITI
15- ELECTRICIAN: DIPLOMA / ITI
16- MECHANICAL FITTER: ITI
17- INSTRUMENT FITTER: ITI
18- MILLWRIGHT FITTER: ITI
19- LIGHT & HEAVY DRIVERS: KUWAIT LICENSE

Apply Instructions for This Job

Interested candidates to apply by email at: jobs@almeer.com.kw Apply instructions for this job
OR by fax 23980682 / 23986574.
Contact 23986594, ext. 215

http://www.almeer.com.kw/jobs.asp

PETROFAC ONSHORE ENGINEERING & CONSTRUCTION | JOB OPENINGS

•	PROJECT ENGINEERING MANAGER	APPLY HERE
•	COST CONTROL ENGINEER	APPLY HERE
•	MANAGER-PROJECT CONTRAOL	APPLY HERE
•	SENIOR PLANNING ENGINEER	APPLY HERE
•	BUYER	APPLY HERE
•	MATERIALS MANAGER	APPLY HERE
•	PROCUREMENT MANAGER	APPLY HERE
•	PROJECT PROCUREMENT MANAGER	APPLY HERE
•	SENIOR BUYER	APPLY HERE
•	DEPUTY HSE MANAGER	APPLY HERE
•	SENIOR HSSE ADVISOR	APPLY HERE
•	SENIOR ENGINEER - HSE MANAGER	APPLY HERE
•	PRINCIPAL ENGINEER - PROCESS	APPLY HERE
•	SENIOR ENGINEER - PROCESS	APPLY HERE
•	PRINCIPAL ENGINEER- ELECTRICAL	APPLY HERE
•	PRINCIPAL ENGINEER-PIPING	APPLY HERE
•	PRINCIPAL ENGINEER - ROTATING EQUIPMENT	APPLY HERE
•	PRINCIPAL ENGINEER - STATIC EQUIPMENT	APPLY HERE
•	SENIOR ENGINEER - MECHANICAL	APPLY HERE
•	SENIOR ENGINEER - ROTATING EQUIPMENT	APPLY HERE
•	SENIOR ENGINEER - STATIC EQUIPMENT	APPLY HERE
•	DEPUTY MANAGER - CIVIL & STRUCTURAL	APPLY HERE
•	PRINCIPAL ENGINEER - CIVIL & STRUCTURAL	APPLY HERE
•	PRINCIPAL ENGINEER - TELECOM	APPLY HERE
•	SENIOR ENGINEER - TELECOM	APPLY HERE

Requirement for Kharafi National - KOC – KUWAIT

Kharafi National - KOC – KUWAIT INTERVIEW

Requirement for Kharafi National - KOC – KUWAIT

www.kharafinational.com

CLIENT INTERVIEW ON -01.06.2014 @ Chennai

1 Mechanical Engineer 800 KD

2 Instrument & Control Engineer 800

3 Electrical Engineer 800 KD

4 Safety Officer (Electrical) 680

5 Senior Instrument & Control Technician 500

6 Senior Electrical Technician 450

7 Senior Mechanic 500 KD

8 Mechanic 370

9 Machinist 290

10 Mechanical Technician (Vibration) 500

11 Rotating Equipment Instrument Technician 450 KD

12 Instrument Technician 400

13 Electrician 350

14 Electrical Mate 200

15 Assistant Mechanical Technician (LD Driver) 200

16 Laborer 110

17 Diesel Mechanic 350

18 Painter Spray

19 CADD Draughtsman 370

20 Grit sandblaster 200

21 Technical Asst. 350

22 Instrument Fitter 270

23 Welder (SS) ONLY EX-KN 300

Candidates with relevant experience in maintenance field in Oil & Gas industry

Ø FREE FOOD AND ACCOMODATION.

Ø FREE TRANSPORT FROM ACCOMMODATION TO SITE AND BACK

Ø ANNUAL PAID LEAVES 30 DAYS / YEAR

Ø TICKET ONCE IN 2 YEARS.

Ø MEDICAL AS PER GOVT LAW.

விவிட் கண்சல்டென்சி,

கே.பி.காம்பிளக்ஸ்,

26,டாக்டர் ராதா கிருஷ்ணன் நகர்,

பூந்தமல்லி நெடுஞ்சாலை,

அரும்பாக்கம்,

சென்னை-600106

மின்னஞ்சல்: vividcareer2@gmail.com

கைபேசி: 7845736741

அலுவலகம்: 044-43328129

பேருந்து நிறுத்தம்: வைஷ்னவா கல்லூரி

பேருந்து எண்: 15 B, 15 F, 27 B, 127, 46, 46 G, 101, 159, 29 E

Proximity sensors:

                    Proximity sensors:

Inductive:
Inductive sensors detect metallic objects at an operating distance of up to 50mm. They are insensitive to external influences and are durable for all applications. They offer high speed, no contact sensing with an extremely long life.

Basic Mode of Operation:
The essential component of the inductive sensors is its oscillator with open coil. When a metallic object approaches the sensor, the oscillation is initially attenued and ultimately interrupted. This effect is detected by a trigger circuit and is forwarded as an output signal.

Capacitive:
Capacitive sensors detect virtually any material (paper, cardboard, plastic, etc.) at any operating distance up to 10mm. They are also suitable for detection of metallic or fluid objects. They offer high speed, no contact
sensing with an extremely long life.

  Basic Mode of Operation:
The heart of the capacitive sensor is an oscillator with open capacitor which generates an electrostatic field. The oscillator does not oscillate if there is no object in the vicinity. If the metallic or non-metallic object to be detected approaches, the capacitance increase and oscillation starts. A trigger circuit detects this change and trips the output signal.  Since different materials influence the electrostatic field differently, the  capacitive sensors should be adjusted accordingly during installation in order to achieve optimum operability. One typical application of capacitive sensors is the detection of fluids in non-metallic containers, e.g. in plastic tanks. Sensors adjustment suppresses any influences resulting from the tank wall.

Qatar Electromechanical company vacancies

STEAM TURBINES

                                STEAM TURBINES:

1.1   A stem turbine is an engine in which the thermal energy of the steam is converted into mechanical energy of rotation. In steam turbine the energy of the steam is transferred into kinetic energy by expansion through nozzles, and the kinetic energy of the resulting jet is in turn converted into force doing work on rings of blades mounted on a rotating part.

1.2   Classification of Steam turbines:

Based on exhaust condition:

a.          Condensing

b.         Non condensing

c.          Automatic extraction

d.         Mixed pressure

e.          Regenerative extraction

f.          Reheat

Based on stage design:

a.          Impulse

b.         Reaction

Based on steam flow:

a.          Axial flow

b.         Radial flow

c.          Mixed flow

Based on stages:

a.          Single stage

b.         Multi stage

Based on casing or shaft design:

a.        Single casing

b.        Tandem casing (two or more)

c.        Cross compound

Based on exhaust stages in parallel:

1. Double flow
2. Triple flow

Based on type of drive:

1. Generator
2. Mechanical drive

1.               Operation principle of steam turbine: Steam turbine develops mechanical work by converting heat energy into work in the steam expansion. The heat energy is converted in two steps. The steam expands in nozzle and expands at a high velocity, converting the available heat energy into velocity energy. The high velocity steam strikes moving blades, converting the velocity energy into work.

               Main advantages with steam turbines:

1.      The economical generation of high temperature and pressure steam is required to reduce the pressure to utilize for various purposes. This will be done by steam turbine there by developing power to run pump etc.

2.      A pump driven by turbine can be operated over a wide speed range utilizing the turbine governor system.

3.      The use of steam turbine driver permits operation of the driven pump is independent of electric power or distribution system.

4.      A turbine may be used as stand by drive system.

5.      The steam turbine controls-governor system and over speed trip system are inherently spark proof.

6.      Steam turbines are inherently self-limiting with respect to power developed. Special protective devices are not required to prevent damaging the turbine because of over load condition.

1.2      Single stage turbine:                In which the conversion of the kinetic energy to mechanical work occurs with a single expansion of the steam in the turbine. A turbine stage consists of a stationary set of blades called as nozzles, and a moving set adjacent thereto, called buckets or rotor blades. These rotating and stationary blades act together to allow the steam flow to do work on the rotor.

1.2       Multiple stage turbine:                In which the conversion of the energy occurs with two or more expansions of steam within the turbine.

1.2      Impulse Turbine:                In impulse stage the steam expands only in the fixed nozzles and kinetic energy is transferred to the rotating buckets as the steam impinges on the buckets while flowing through the passage between the buckets. The steam pressure is constant and the steam velocity relative to the bucket decreases in the bucket passages.

1.2    Reaction stage:                     The steam expands in both the fixed nozzles and the rotating buckets. The kinetic energy is transferred to the rotating buckets by the expansion of the steam in the passages between the buckets. The steam pressure decreases as the steam velocity relative to the bucket increases in the bucket passages.

1.3  Parts and functions of steam turbine:

-          Rotor

-          Stem chest

-          Casing

-          Over speed trip system

-          Governor system

1.3.           Steam chest and the casing:                    Connected to higher pressure steam supply line and the low pressure steam exhaust line respectively. The steam chest connected to casing, houses the governor valve and the over speed trip valve. The casing contains the rotor and nozzles through which the steam is expanded and directed against the rotating buckets.

1.3              Rotor:                     Consists of shaft and disk assemblies with buckets. The shaft extends beyond the casing through the bearing cases. One end of the shaft is used for coupling to the driven pump. The other end of the shaft serves the speed governor and the over speed trip system.

         The bearing cases:              Supports the rotor and assemble casing and steam chest. The bearing cases contain the journal bearings and the rotating oil seals, which prevent outward oil leakage and the entrance of water, dust, and steam. The steam end bearing case contains the rotor positioning bearing and the rotating components of the over speed trip system. An extension of the steam end bearing housing enclose the rotating components of the speed – governor system.

1.             Casing sealing glands:          Seal the casing and the shaft. Spring backed segmental carbon rings used for this and supplemented by a spring backed labyrinth section for higher exhaust-steam.

1                 Governor system:             Governor systems are speed-sensitive control systems that are integral with the steam turbine. The turbine speed is controlled by varying the steam flow through the turbine by positioning the governor valve. Consists of spring-opposed rotating weights, a steam valve, and an interconnecting linkage or servo motor system. The governor sense turbine shaft speed through direct connection, worm/worm wheel, or magnetic impulse from a gear. The turbine speed is compared to some predetermined set point and the governor output signal to a servo motor. Change in the turbine inlet and exhaust-steam conditions, and the power required by the pump will cause the turbine speed to change. The change in speed results in repositioning the governor weights and subsequent repositioning of the governor valve.

5         Over speed trip system:           The trip mechanism acts independently of the governor controlled system and closes the trip valve to stop the flow of steam to the turbine in the event of over speed condition. Consists of a spring-loaded pin or weight mounted in the turbine shaft on a collar, a quick-closing valve which is separate from the governor valve and interconnecting linkage. The centrifugal force created by rotation of the pin in the turbine shaft exceeds the spring loading at a preset speed. The resultant movement of the trip pin causes knife-edges in the linkage to separate and permit the spring loaded trip valve to close. Over speed governors is arranged to trip at 10 percent over normal speed actuating a quick closing stop valve to shut off the steam supply to the turbine.

       Labyrinth seal:            Labyrinth is a means of reducing leakage from high pressure side to low pressure side by allowing a small amount of leakage. The clearance between labyrinth and shaft is kept at the minimum possible. Gases enter the narrow passage between shaft and labyrinth expand because of space available in the first space resulted to less pressure p1 from p. Similarly the gases enter second space through the restricted passage and expand to less pressure. Thus in last stage, the pressure will be on slightly above atmospheric which will be very small. Thus labyrinths are used for minimizing leakage of gases from high pressure side to low pressure side.

            Carbon ring seals:          Consists of carbon ring segments and these segments held together by retaining spring. Anti rotation stops fit in the notches in the bottom half interstage diaframs

(casing) and carbon rings prevents the rotation.

1.3          Nozzle ring and reversing blade assembly:               The nozzle ring is bolted to the inside bottom half of the steam end casing. The nozzles located in the nozzle ring, direct the steam flow from the steam chest to the Curtis stage first row blades. The reversing blade assembly is located between the blade rows of the Curtis stage (the Curtis stage has two rows of blades) and is bolted to the nozzle ring. The reversing blades reverse the steam flow as it exits the first row of blades and directs the steam into the second row of blades of the Curtis stage. The reversing blade assembly is positioned axially by spacers.

  

1.                    Diaframs:              Stationary diaframs separate the inner stages, contain the interstage nozzles and interstage seals. The nozzle expand the steam and direct it against the following rows of rotating blades. The diaframs are adjusted on assembly to allow for rotor deflection and to assure that the seals are concentric with the shaft. The bottom half of diaframs are located vertically in the casing grooves by shims at the bottom of the grooves and laterally by means of adjusting screws at the horizontal joint. The top halves of the diaframs are fixed in the casing by the same arrangement and lift with the casing cover.

1                Sentinel valve:            This is warning device located on the top of the exhaust end turbine casing, indicates excessive turbine exhaust end casing pressure. In the event the casing pressure exceeds a predetermined setting above the normal operating pressure, the valve releases a small amount of visible steam to the atmosphere, causing an audible sound. This valve will not serve as a relief valve.

1.3             Auxiliary steam valves:        Auxiliary valves are used to achieve more efficient operation with varying load or steam conditions. The valves are provided in the steam passage way (in the bottom half of the steam end turbine casing) between the steam chest and nozzle ring. The passage is cast in three separate compartments. One compartment is continuously open for steam flow to a bank of nozzles in the nozzle ring. The other two are fitted with auxiliary hand valves to control the flow of steam to two other banks of nozzles in the same nozzle ring.

                       Turning Gears:              Large turbines are equipped with turning gears to rotate the rotors slowly during warm up, cool off. This is to maintain the shaft or rotor at an approximately uniform temperature circumferentially, so as to maintain straightness and preserve the balance.