1B3 Chapter 4 Pressure Vessel and Piping Repairs

1st Class Power Engineering

What is the main responsibility of individuals or organizations that own or operate pressure vessels and piping?

To comply with all rules and legislation of the municipal or provincial safety authority regarding their equipment.

What are the objectives for compliance with safety codes and regulations for pressure vessels?

To maintain equipment integrity, protect people and the environment, and sustain cost-effective operations.

What does the CSA Code B51-03 provide guidelines for?

It provides guidelines for the operation, maintenance, and repair of pressure vessels and pressure piping.

Which engineering codes are referenced in CSA B51-03 for pressure vessel repairs?

American Society of Mechanical Engineers (ASME), National Board Inspection Code (NBIC) NB-23, and ANSI/API 510 and 570.

What must a first-class power engineer understand regarding pressure vessel repairs?

The safety standards act and regulations of their province or territory.

What is the overall responsibility of the owner of a pressure vessel?

To ensure compliance with safety standards and regulations for the pressure vessel and piping system.

What is required for a pressure vessel to be constructed or operated in Canada?

It must have a Canadian Registration Number (CRN).

What are the key components of a quality assurance/quality control (QA/QC) program?

A detailed description of all requirements for a fully functional QA/QC program as outlined in NBIC NB-23.

What should a preventive maintenance program include?

Clearly defined procedures for maintenance of pressure vessels and piping.

What is the purpose of an inspection program for pressure vessels?

To track and trend the condition of pressure vessels and ensure compliance with safety standards.

Who is responsible for ensuring that inspections and repairs are conducted by qualified individuals?

The owner or plant manager.

What is the first step in the repair process for a pressure vessel?

Carrying out an initial inspection by a qualified person approved by the safety authority.

What must happen after a repair procedure is developed for a pressure vessel?

It must be documented and signed by a certified engineer or qualified individual.

What is required after a repair is completed on pressure equipment?

Post-repair testing procedures must be carried out as specified in the jurisdiction's codes.

What documentation is required after repairs to pressure vessels?

All required reports and documentation must be prepared and copies delivered to the appropriate safety authority.

What is the purpose of tracking and trending inspection data?

To respond to any issues and ensure ongoing compliance with safety standards.

What is the role of a certified inspector in the inspection process?

To perform various inspection processes for pressure vessels and piping according to established qualifications.

What is the significance of the Canadian Registration Number (CRN)?

It indicates that the pressure vessel is registered for construction and operation in Canada.

What must be ensured when choosing a consulting company for repairs?

The company must be approved by the appropriate regulating body or authority.

What is the importance of a clearly defined inspection program?

It helps ensure that inspections are thorough and compliant with safety standards.

What is a common problem area identified during pressure vessel inspections?

Cracks and corrosion.

What must be done before a pressure vessel can be returned to service after repairs?

Follow-up inspection, testing, documentation, and record keeping must be completed.

What is the role of the owner or plant manager in the maintenance of pressure vessels?

To develop, institute, and maintain continuous quality assurance and preventive maintenance programs.

What is the purpose of a preventive maintenance program?

To ensure the ongoing safe operation of pressure vessels and piping.

What is the role of the safety authority in the repair process?

To review and approve the repair procedure before it is implemented.

What type of testing may be required after repairs to pressure vessels?

Hydro-testing, radiography, or other non-destructive examination (NDE) testing.

What is the consequence of failing to comply with safety standards for pressure vessels?

Increased risk of equipment failure, safety hazards, and potential legal repercussions.

What may be required if a repair is significant or alters a pressure vessel?

A new CRN (Canadian Registration Number) and/or a new nameplate.

What is required for a repair company to manage and perform repairs on pressure vessels in most provinces?

The company must be certified and hold an R Stamp from the NBIC or an ASME repair code stamp.

What must non-certified owners or repair companies do when performing repairs?

Repairs must conform to the same rules and regulations governing ASME or NBIC certified shops.

Who reviews and approves the details of repairs before they commence?

The regional safety manager under whose jurisdiction the equipment resides.

What is the purpose of evaluating and inspecting pressure vessels and piping?

To ensure long-term operational integrity.

What document provides guidelines for Fitness for Service in pressure equipment?

API 579.

Which industries specifically use the API 579 standard?

Oil and gas, and petrochemical industries.

What do the codes and standards for pressure vessels cover?

Original engineering, design, and construction processes.

What does Fitness for Service help owners and users to do?

Make risk-based decisions about the existing integrity of pressure equipment.

What are the key components of a Fitness for Service program?

Standardization, outlining objectives, auditing methods, follow-up methods, and feedback systems.

What is included in the baseline data for a Fitness for Service program?

Detailed design, installation, construction data, and equipment specifications.

What does MAWP stand for?

Maximum Allowable Working Pressure.

What should the inspection requirements matrix be based on?

Levels of risk, original designs, current operating parameters, environmental conditions, historical data, and accepted engineering practices.

What is the purpose of a response matrix in a Fitness for Service program?

To identify minimum allowable wall thickness and trends indicating high risk.

What should be standardized in a Fitness for Service program?

Timing of inspections, NDE evaluation methods, and areas to be inspected.

What does NDE stand for?

Non-Destructive Examination.

What is the goal of quantifying corrosion and damage in pressure vessels?

To objectively analyze and interpret the results for maintenance decisions.

What is the significance of historical data in a Fitness for Service program?

It helps in assessing the condition and trends of the equipment over time.

What should be included in the action plan activation system?

Components that identify minimum allowable wall thickness and trends indicating high risk.

What is a critical aspect of maintaining a Fitness for Service program?

Implementing a systematic method of feedback and program enhancement.

What does the term 'fitness for service' refer to?

The ability of pressure equipment to operate safely and effectively under specified conditions.

What is the role of the American Petroleum Institute in pressure vessel safety?

To issue standards like API 579 for Fitness for Service.

What is the importance of site-specific knowledge in a Fitness for Service program?

It ensures the program addresses unique issues related to the facility and equipment.

What does the acronym ASME stand for?

American Society of Mechanical Engineers.

What does the term 'corrosion allowance' refer to?

The extra thickness of material included in the design to account for expected corrosion.

Why is it important to standardize methods for tracking and trending inspection data?

To ensure consistency and reliability in data analysis and decision-making.

What is the objective of an inspection program for pressure vessels?

To identify wear, metal or material loss, corrosion or erosion, and any thermal, mechanical, or chemical actions that may compromise integrity.

What are the key components of a repair strategy for pressure vessels?

Quality control program, flow chart for tracking repairs, accepted repair practices and standards, testing methodology post-repair, and management of change program.

What is the importance of visual inspection in pressure vessel maintenance?

It allows for quick identification of patterns and trends, covering internal and external surfaces effectively.

What are the two stages of visual inspection?

Stage one: Inspect for leaks and potential issues without disturbance. Stage two: Inspect cleaned surfaces for specific discontinuities.

What does Magnetic Particle Testing (MPT) detect?

Surface discontinuities such as cracks by using magnetic fields to attract particles to defects.

How does Liquid Penetrant Testing (LPT) work?

A colored penetrant is applied to the surface, allowed to seep into voids, then a developer highlights discontinuities.

What is the purpose of a management of change program in equipment repairs?

To manage changes to equipment, processes, or operating parameters associated with repairs.

What is the significance of ASME Section V in inspection programs?

It provides detailed information on non-destructive examination (NDE) practices and qualifications for inspectors.

What does API 570 and 510 detail?

Inspection methods and practices for pressure piping and pressure vessels, respectively.

What is the role of documentation in an inspection program?

To record data in a standardized format that is clear, easy to understand, and can be tracked and trended.

What is the first step in a visual inspection process?

Inspect for leaks, potential flow patterns, and visual stress areas before any disturbance.

What is the purpose of a flow chart in a repair strategy?

To track the repair process from problem identification to final documentation.

What type of issues can be identified through visual inspections?

Leaks, corrosion, erosion, and stress areas.

What is the main advantage of having the same inspector for visual inspections each year?

The inspector becomes trained to recognize patterns and trends specific to that equipment.

What does the term 'non-destructive examination' (NDE) refer to?

Inspection methods that do not damage the equipment being tested.

What is the significance of a quality control and assurance program in repairs?

To ensure that repairs meet established standards and practices.

What is the purpose of testing methodology after repairs?

To prove the integrity of the equipment before it is reinstated for service.

What is the role of the chief engineer during inspections?

To oversee the inspection process and ensure all potential issues are addressed.

What is the benefit of using a variety of NDE processes?

To best suit the metallurgy and processes being inspected.

What is the typical outcome of a well-executed inspection program?

Enhanced integrity of pressure vessels and reduced associated risk levels.

What is the purpose of the developer in Liquid Penetrant Testing?

To draw the penetrant from surface discontinuities, highlighting problem areas.

What does the term 'accepted repair practices' refer to?

The codes and standards that must be followed during repairs.

What is the main focus of Radiographic Testing?

To detect discontinuities in materials and inspect welds for defects.

What is the importance of a standardized inspection process?

To ensure consistency and reliability in evaluating the condition of pressure vessels.

What is the role of visual stress areas in inspections?

They indicate potential points of failure or concern in the pressure vessel.

How does the inspection program contribute to facility safety?

By identifying issues that could compromise the operation and integrity of pressure vessels.

What is the significance of tracking and trending inspection data?

To identify patterns over time and improve maintenance strategies.

What is the purpose of radiographic testing?

To inspect the integrity of materials by using gamma rays or x-rays to reveal flaws.

How does radiographic testing reveal discontinuities?

Discontinuities appear as dark lines or overexposed spots on the film due to varying ray penetration.

What is required to compare the integrity of a weld during radiographic testing?

A reference piece of metal of the same thickness and metallurgy as the vessel wall.

What is the retention period for exposed films from inspections?

From 5 years to the life of the facility, depending on codes and regulations.

What does ultrasonic testing (UT) use to detect flaws?

High frequency sound waves that bounce back upon hitting a surface or discontinuity.

What is the role of a calibration block in ultrasonic testing?

To check the accuracy of the UT device after a specific number of tests.

What does metallographic testing evaluate?

The condition of the metal microstructure after polishing and etching the surface.

What is the purpose of acoustic emission testing?

To collect transient acoustic emissions generated by energy release from localized sources.

How does eddy current testing (ECT) work?

It uses magnetic fields generated by AC currents to detect discontinuities and material loss.

What is a critical requirement for effective eddy current testing?

There must be prior knowledge of what is being tested for specific results.

What is one function of a deaerator in pressure vessels?

To remove undesirable gases like oxygen and carbon dioxide from feedwater.

What environmental conditions can affect deaerators?

Hot, damp environments with external vibrations and airborne contaminants.

What type of corrosion can occur in deaerators due to hydrogen ions?

Hydrogen embrittlement and hydrogen cracking.

What is the impact of fluctuating temperature and pressure on deaerators?

It promotes vibration and cyclic action on the metal and its components.

What can cause underdeposit corrosion in deaerators?

Concentration of chemicals in various places within the vessel.

What is the effect of changing fluid flow rates in a deaerator?

Increased potential for washing and channeling of fluids.

What is the significance of a high-powered field microscope in metallographic testing?

It allows for detailed evaluation of the metal's microstructure.

What is the relationship between the intensity of rays and the darkness of the film in radiographic testing?

The darkness of the film is directly proportional to the volume or intensity of rays that pass through.

What is the primary advantage of ultrasonic testing?

It provides highly accurate detection of flaws beneath the surface.

What must be done before performing ultrasonic testing?

The surface must be cleaned and usually a gel is applied.