Latest Event Updates

Plumbing Engineering Notes

Posted on Updated on

  1. What are the Plumbing System in Buildings and Malls?
    1. Water Supply and distribution Sytem
    2. Sanitary Drainage and Diposal System
    3. Storm Drainage System
    4. Plumbing Fixtures
    5. Fire Protection System
    6. Fuel and Gas Piping System
  2. What are the types of Pipes used in Plumbing and their application?pipe Material
  3. What is the Plumbing Cycle?Plumbing Cycle-1
  4. What are the types of pumps used in plumbing?
    1. Centrifugal Pump
    2. Reciprocatting Pump
    3. Turbine Pump
    4. Submersible Pump
  5. What are the different types of  Fixtures used in Plumbing and their uses?
    1. Water Closets ( Western)
    2. Water Closets ( Eastern)
    3. Wall hung Urinals
    4. Wall hung basins
    5. Pedestal type lavatories
    6. Kitchen Sinks
    7. Showers
    8. Floor Drains
    9. Clean Outs
    10. Grease Interceptors
      • Grease-Trap-Interceptor
    11. Backflow Preventers
      • Backflow Preventerbackflow-prevention-rev
    12. Water Pressure Regulators
    13. Water Hammer Arrestor
      • Water_Hammer_Arestor.png
    14. Thermostatic Mixing Valves
      • Thermostatic valve
  6. What are the types of pipe supports in plumbing?piping-supports-hangers-clamps - Corzan.png
    • Source: Corzan
  7. What are the symbols and terms used in Plumbing?
    1. Floor Sink (FS)
      • Floor Sink - Plumberex
    2. Floor Drain (FD)
      • Floor Drain - Basika Floor Drains.png
    3. Roof Drain (RD)
      • Roof Drain - Mesa, AZ - The Roof Medics.JPG
    4. Two Ways Control Valve
    5. Shut-off Valve
      • SutOffValve - Paradigm Plumbing Services
    6. Flow Control Valve
      • Control Valve Operation - Dwyer Instruments
    7. Water Meter
      • water Meter Assembly.jpg
    8. Strainer
      • basket-filters-y-type-strainer-500x500
    9. Strainer with blow-off valve
      • Strainer with Blow-off Valve.png
    10. Relief/Safety Valve
      • safety-valve-in Operation
    11. Solenoid Valve
      • Solenoid Valve - Duda Diesel.jpg
    12. Pressure Reducing Valve
    13. Gas Pressure Regulator
    14. Pipe Anchor
    15. Expansion Joint
    16. Union
    17. Flange Connection
    18. Hose Bib
    19. Non Freeze Wall Hydrant
    20. Air Vent / Vaccum Relief Valve
    21. Pressure/ vaccum Switch
    22. Elbow with Shut-off Valve
    23. TEE with Shut-off valve
    24. Recirculating Pump
    25. P-Trap
    26. Gas Cock
    27. Trap Primer
    28. Trap Primer with Distribution Unit
  8. When Insulations are used and what are the types of insulation?
    • Insulations are used for cold and hot services to control heat losses.
    • Most Common type of insulation materials are
      • Mineral Fiber
      • Flexible Elastomeric
    • Thickness is based on sizes 20mm to 30mm
  9. What are the documents to be verified during execution of Plumbing and their purposes?
  10. What is the general Layout  of Each plumbing System?
  11. What are the Pipe material chosen for each service?
    • Pipe Material Selection-1
  12. What is the difference between Drain, Wastage and Vent?

Phases of Plumbing

Posted on Updated on

  1. Phase – 1 Under ground Rough -in
  2. Phase -2 Above ground Rough -in  (Top-out or stack-out)
  3. Phase -3 Finish (Trim-out or trim finish)
  4. Phase -4 Services and Maintenance

General Terms – In Plumbing

Posted on Updated on

  1. Aboveground Rough-In – ” The Second phase of plumbing project, during this phase, holes are cut in walls, ceiling and floor for supply and waste pipes to be attached or hung so they can be connected to fixtures. It is also referred as Stack out or top-out.”

  2. Appurtenances – Apparatus or Accessories

  3. Aqueduct – A man made channel used to carry water

  4. Backflow – The flow of contaminated water into fresh water system resulting from cross-connection between potable and non-potable system

  5. Backflow Preventer – A device which prevents a non-potable water system into potable water supply

  6. Chlorine – A heavy, greenish yellow gas used as disinfectant in water treatment

  7. Code – A requirement published by local and state government for construction enforced as a law.

  8. Cross-connection – An arrangement between potable and non potable water system.

  9. Disinfection – A Process of destroying harmful organism from potable water

  10. Drain, Waste and Vent – A piping system contains sanitary drainage with vent.

  11. Filtration – A Process of cleaning water from particles and chemicals

  12. Finish – A third phase of plumbing where installation of fixtures, appliances, water purification systems, water heaters and controls takes place. it is also called trim finish

  13. Fixtures – A device that receives water supply from water supply line like sinks, shower stalls and toilets

  14. Potable – Water Safe for cooking and drinking

  15. Softening – A process of removing magnesium and sodium salts that causes scale inside pipes and fittings

  16. Trim-out – the phase of plumbing project during which the engineer locates all supply and waste connections from the building systems to public utilities and establishes from where these systems enter or leave the buildings.


MEP – Plumbing Basics

Posted on Updated on

Plumbing is system that helps the movement of fluid through pipes and consists of valves, plumbing fixtures, tanks and other accessories

Plumbing Applications

  1. Heating and Cooling Systems
  2. Rain water, surface and sub-surface water drainage
  3. potable cold water and hot water supply
  4. Water recovery and treatment systems
  5. Fuel Gas Piping
  6. Waste Removal

Plumbing Fixtures – In general

  • Bathtubs
  • Bidets
  • Channel drains
  • Drinking fountains
  • Hose bib (connections for water hoses)
  • Janitor sinks
  • Kitchen sinks
  • Lavatories
  • Showers
  • Pipes
  • Tapware – an industry term for that sub-category of plumbing fixtures consisting of tap valves, also called water taps (British English) or faucets (American English), and their accessories, such as water spouts and shower heads.
  • Terminal valves for dishwashers, ice makers, humidifiers, etc.
  • Urinals
  • Utility sinks
  • Water closets (WC)
  • A112.18.1 Plumbing Supply Fittings Standard, American Society of Mechanical Engineers (ASME)
  • A112.18.2 Plumbing Waste Fittings Standard, American Society of Mechanical Engineers (ASME)

Types of Plumbing Valves

  1. Gate Valve
  2. Ball Valve
  3. Globe Valve
  4. Check Valve
  5. Air Release Valve
  6. Butterfly Valve
  7. Angle Valve
  8. Needle Valve
  9. Diaphragm Valve

Types of Plumbing Pipes

    1. PEX
    2. PVC -Polyvinyl Chloride
    3. Rigid Copper
    4. ABS
    5. Flexible Copper Tubing
    6. Galvanized Steel
    7. Cast Iron









Manpower and Equipment Histograms

Posted on Updated on

  1. Histogram (For both Manpower and Equipment)


Project Execution Plan – Content

Posted on Updated on

Every project its own execution plan based on its environment, conditions and contract type.

So it is necessary to create an execution plan before start to perform efficiently

Here is the Sample content to be included in any execution plan

Project Execution Plan – Content




Pre-Qualification of Contractors -KOC

Posted on

Process of Pre-Qualification of Local Sub Contractor

  1. Check  KOC E-business Website for the news and announcement of Contractor Pre-Qualification
  2. Pay KD: 100 as Participation Fee
  3. Submit application to SRM Team
  4. Application received and reviewed
  5. Application will be reviewed by LCEC Members
  6. Site visit to Contractor’s office
  7. Site visit to Contractor’s workshop
  8. LCEC Members meet to finalize the site visit report
  9. Dully sign will be sent for M(CS) Approval
  10. Approved reports will be sent to SRM
  11. Notify Applicants with the Result
  12. Publish Approved List in KOC’s Website

Evaluation Aspects

PQ application evaluation consists of the following aspects:

1) Commercial Evaluation

2) Technical Evaluation

3) Financial Evaluation

4) QA/QC Evaluation

5) HSE Evaluation (for contractors only)

Key Terms:

  1. SRMT – Supplier Relation Management Team
  2. LCEC – Local Contractors Evaluation Committee (LCEC)
  3. KOCPC Tenders – KOC Procurement Committee
  4. KPCHPC Tenders – KPC Higher Procurement Committee
  5. CAPT Tenders – Central Agency for Public Tenders
  6. CS – Commercial Support

KOC Categories for Pipeline/ Piping Works


250100 – Pipelines Exceeding 12″ Diameter, Major Manifold Construction and Associated Work


2-A_-_Pipelines_Exceeding_12_Diameter,_Major_Manifold_Construction_and_Associated_Works (1) 



16 – EPC Major Onshore Oil and Gas Pipeline Projects

00_Cat-16 – EPC of Major Onshore Oil & Gas Pipeline Projects

Applicants Financial Status 

Pre-Qualification Documents Requirement for

Work Category – 16

Invitation & Guidelines         Invitation_Cat-16-EPCofMajorOnshoreOilGasPipelineProjects

HSE Requirements HSE_Cat-16-EPCofMajorOnshoreOilGasPipelineProjects-Copy

Technical Requirements Technical_Cat-16-EPCofMajorOnshoreOilGasPipelineProjects

ORGANIZATION AND STRUCTURE PQ-ApplicantOrganizationandStructure

Letter Of Submittal PQ-LetterofSubmittal1499144846413

Financial Requirements – Status Excel Form – 01_ApplicantFinancialStatus

Financial Requirements – PQ-FinancialSection1498981136749


Source Website: KOC ebusiness