INSTRUMENTATION DEP STANDARDS:
1. DEP 32.30.20.11-Gen.
Fire, gas and smoke detection systems
2. DEP 32.30.20.13-Gen.
Foundation™ Fieldbus - Design and configuration
3. DEP 32.30.20.15DGen.
DCS basic application standards
4. DEP 32.31.00.32-Gen.
Instruments for measurement and control
5. DEP 32.31.00.34-Gen.
Instrumentation documents and drawings
6. DEP 32.31.09.31-Gen.
Instrumentation for equipment packages
7. DEP 32.37.20.10-Gen.
Instrument signal lines
8. DEP 32.37.10.11-Gen.
Installation of on-line instruments
9. DEP 62.10.08.11-Gen.
Inspection and functional testing of instruments
10. DEP 32.80.10.10-Gen.
Instrumented protective functions (IPF)
11. DEP 32.10.03.10-Gen. Instrumentation symbols and identification on process
engineering flow schemes
12. DEP 32.36.01.17-Gen.
Control valves - Selection, sizing and specification
13. DEP 80.00.10.10-Gen.
Area classification
14. DEP 31.37.00.11-Gen.
Instrument air supply
Question and Answers:
1.What are the responsibilities of QC Inspector?
Inspect the incoming Materials and all the activities from the field to Control Room based on the
Approved Inspection test plan.
Implementation and supervision of all procedures and work instructions.
Implementation and supervision of all sub-contractor’s quality plan, inspection plan, procedures and
work instructions.
Maintaining records of calibration, inspection and testing and equipment.
2.What is the minimum requirement for instruments installed in the field?
Zone 1 Group II B Temp Class T4 as per SP 1243 Version 4.
3.What are the Standards for Hazardous Area Classification?
SP2311 Version 1 and DEP 80.00.10.10 FEB 2017.
4.What is the minimum requirement of IP for Outdoor and Indoor?
IP54 for Outdoor and IP20 for Indoor.
5.What is the DEP for Instrument Signal lines?
32.37.20.10
6.What is the IP66?
First digit means dust tight and second digit means water Jet.
7.what is the separation distance for crossing cable instrument and electrical?
300mm
8.what is the separation distance for parallel electrical and instrument cable?
600 to 750mm.
9.what is the separation distance from hot pipes without insulated?
200mm.100 mm for each 100 deg centigrade.
10.what is the trench depth for road?
1metre.
11.howmany signal level class for instrument?
6 level.
12.Explain each signal level class?
Class 1: Analog low level/Medium level (mv/TC /RTD/Computer bus signals)
Class 2: Analog high level – 1 to 10 vdc-Electronic instrumentation loops
Binary low level – 24vdc -Actuating logic systems/annunciators
Digital low level – Turbine meters and proximity sensors
Class 3: Digital high level – Tank gauging system / Vibration sensors.
Class 4: less than 50 volt- 24volt solenoid
Class 5: 110v solenoid
Class 6: digital (fibre optic) – communication
13.What is the zone 0?
A place in which an explosive atmosphere continuously present.
14.What is the zone 1?
A place in which an explosive atmosphere is likely to occur in normal operation occasionally.
14.What is the zone 2?
A place in which an explosive atmosphere is not likely to occur in normal operation, but if it does
only occur for short periods.
15.What is the type of Protection?
Intrinsic safety Exi – Exia to be used in Zone 0,1 and 2
Exib to be used in Zone 1 and 2
Flame proof Exd – to be used in Zone 1 and 2
Increased safety Exe - to be used in Zone 1 and 2
Pressurisation Exp - to be used in Zone 1 and 2
Encapsulation Exm - - to be used in Zone 1 and 2
Oil immersed Exo - to be used in Zone 1 and 2
Powder filling Exq - to be used in Zone 1 and 2
Non-sparking Exn - to be used in Zone 2
16.what are the pdo golden rules?
Comply with the law, standards and procedures.
Intervene or unsafe or non-compliant actions.
Respect our neighbours.
16.what are the pdo lifesaving rules?
Permit to work-work with a valid work permit when required.
Gas test – conduct gas test when required.
Verify isolation – verify the isolation before work begins and use specified life protecting equipment.
Confined space – obtains authorisation before entering a confined space.
System override – obtain authorisation before overriding or disabling safety critical equipment.
Working at height – protect yourself against a fall when working at height.
No walk under the load – do not walk under a suspended load.
No smoking – do not smoke outside designated smoking areas.
Journey management – follow prescribed journey management plan.
Seal belt – wear your seat belt.
Speed limit – do not use your phone and do not exceed speed limit.
Drugs or Alcohol – no alcohol or drugs while working or driving.
17.what are the pdo emergency number?
2438 5555 or 24675555