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Selection , Commissioning & Maintenance of Shutdown , Blowdown , Severe Service & Choke Valves

  • Schedule : Online
  • Who is this for: Mechanical Engineering Students , Professionals

Duration: 5-8 Hours
Schedule: Online
Level: Beginner
Rs: 29,000

Course Overview

Objectives

  • Gain an understanding of ShutDown Valve (SDV) and BlowDown Valve (BDV) criticality in the context of a safety system, valve inherent reliability, availability requirements and operational constraints
  • Valve design codes including ISO 14313, API 6D, ISO 17292 • Material selection for SDV, BDV and severe service/choke valves body and trim including NACE requirements
  • Seat leakage classifications and standards (ANSI, IEC, ISO, BS)
  • Size actuators and understand torque requirements
  • The use of smart positioners 

  • Introduction
  • Types of SDV / BDV Valves
  • Actuators
  • Considerations for Utilizing Actuators & Accumulators
  • Specification , Selection , Procurement & Factory Witness Testing (FWT) of SDV / BDV Valves
  • Commissioning , Maintenance & Operational Performance Testing of SDV / BDV Valves
  • Riser Emergency Shutdown Valves (RESDV)
  • High Integrity Protection Systems (HIPPS)
  • Considerations for Utilizing HIPPS
  • Severe Service Control Valves
  • Wellhead Choke Valves
  • Considerations for Utilizing Wellhead Choke Valves

 

 

Topics covered are

  • Basic concepts of SDV/BDV valves and their use as part of an Emergency Shutdown System
  • Requirements of Safety Standards applicable to SDV/BDV valves: IEC16508/ IEC16511
  • SIL levels, failure rates, MTBF, hardware fault tolerance, avoiding systematic failures, failure to operate on demand, redundancy
  • Availability requirements
  • Reliability requirements of SDV/BDV valves
  • Valve cycle times
  • Applicable codes and regulations
  • Definitions and terminolog
  • Full bore ball valve
  • Reduced bore valve: sizing considerations
  • Butterfly valve
  • Control valves
  • Linear vs rotary
  • Valve sizing considerations for liquid and gases
  • Maximum noise calculations
  • Material selection: body, trim, seals, O-rings, gaskets
  • Valve end connection options: flanged/ clamplock
  • Valve trim
  • Leak rates: maximum allowable seat and backseat leakage
  • Fire safe valves, standards, codes and tests
  • Types of actuators: pneumatic, hydraulic, electric, spring return, dual action, scotch yoke
  • Selection: prolonged position (long stand still) break torque requirement
  • Sizing
  • Actuator trim
  • Torque requirements for blowdown valves: spring start to open torque, opening torque, running torque, start to close (air start torque), reseat torque (end of close stroke)
  • Torque requirements for shutdown valves: spring start to close torque, closing torque, running torque, start to open (air start torque), reseat torque (end of open stroke)
  • Stem shear torque
  • Minimising size on offshore applications: dual acting hydraulic
  • Maximum operating pressure and maximum allowable working pressure
  • Actuator dimension limitations
  • Pneumatic hookups: closed loop breathing systems
  • Hydraulic systems for remote operation of SDV/BDV Valves
  • Fire safe actuators and fire blankets
  • Accumulators: uses
  • Types of accumulators: hydraulic/electric
  • Selection: bladder accumulators, piston accumulators, diaphragm accumulators, other
  • Sizing and other considerations
  • Preparation of a detailed technical specification
  • Data sheets for SDV/BDV
  • Accessories for SDV/BDV: solenoid valves, redundant solenoid valves, exhaust valves, smart positioners, position switches and indicators
  • Purchase order details: handling and transportation, spare requirements, quality assurance requirements, certification of materials, supplier documentation requirements, instructions to suppliers, weight control (offshore)
  • Protective coating specification
  • “As Built” updates to documentation
  • Testing: performance testing, leak test, verification of fire safe testing, inspector competency
  • Commissioning of SDV/BDV valves: considerations during pressure testing and flushing, construction waste and sea water issues
  • Failure to operate on demand: jerky operation, slow operation, failure to fully open or close, valve leakage
  • Operational performance testing of SDV/BDV valves: proof testing periods, reliability centred maintenance techniques, partial stroke testing
  • The use of “Smart Positioners” to verify valve status
  • Maintenance of SDV/BDV valves: preparation of a standard for factory overhaul of SDV/BDV valves to return valve and actuator to “As New” specification
  • Requirements, description, associated systems and parts
  • Valve design
  • Regulatory requirements
  • Reopening criteria: “Locked Closed” until authorised via independent master control panel
  • Achieving maximum reliability
  • Common mode failure points: failure modes effects and criticality analysis
  • RESDV valve selection: maximum reliability, availability and durability.
  • Actuator requirements: spring return, closing thrust requirement
  • Valve closure rate
  • Protection for fire, explosion and impact, active and passive fire protection, RESDV fire safe time period, fire protection failure criteria specific engineering requirements
  • Ensuring fail safe operation: protection and redundancy of control lines
  • Factory witness testing: full pressure and leakage test, competency of inspecting test verification engineer