General Meeting NB Members Authorized Inspection Agencies Owner-User Inspection Organizations Review Team Leaders Test Lab
 

  Email      Print
   Technical Articles
A Boiler: The Explosive Potential of a Bomb
Acoustic Emission Examination of Metal Pressure Vessels
Anatomy of a Catastrophic Boiler Accident
Austenitic Stainless Steel
Auto-Refrigeration
Basic Weld Inspection - Part 1
Basic Weld Inspection - Part 2
Black Liquor Recovery Boilers - An Introduction
Boiler Efficiency and Steam Quality: The Challenge of Creating Quality Steam Using Existing Boiler Efficiencies
Boiler Logs Can Reduce Accidents
Boiler/Burner Combustion Air Supply Requirements and Maintenance
Carbon Monoxide Poisoning Preventable With Complete Inspection
Combustion Air Requirements:The Forgotten Element In Boiler Rooms
Creep and Creep Failures
Description of Construction and Inspection Procedure for Steam Locomotive and Fire Tube Boilers
Ensuring Safe Operation Of Vessels With Quick-Opening Closures
Environmental Heat Exchangers
Factors Affecting Inservice Cracking of Weld Zone in Corrosive Service
Failure Avoidance in Welded Fabrication
Finite Element Analysis of Pressure Vessels
Fuel Ash Corrosion
Fuel Firing Apparatus - Natural Gas
Grain Boundaries
Heat Treatment - What Is It?
How to Destroy a Boiler -- Part 1
How to Destroy a Boiler -- Part 2
How to Destroy a Boiler -- Part 3
Identifying Pressure Vessel Nozzle Problems
Inspection, Repair, and Alteration of Yankee Dryers
Inspection, What Better Place to Begin
Laminations Led to Incident
Lay-up of Heating Boilers
Liquid Penetrant Examination
Low Voltage Short Circuiting-GMAW
Low Water Cut-Off Technology
Low-Water Cutoff: A Maintenance Must
Magnetic Particle Examination
Maintaining Proper Boiler Inspections Through Proper Relationships
Microstructural Degradation
Miracle Fluid?
Organizing A Vessel, Tank, and Piping Inspection Program
Paper Machine Failure Investigation: Inspection Requirements Should Be Changed For Dryer Can
Pipe Support Performance as It Applies to Power Plant Safety and Reliability
Polymer Use for Boilers and Pressure Vessels
Pressure Vessel Fatigue
Pressure Vessels: Analyzing Change
Preventing Corrosion Under Insulation
Preventing Steam/Condensate System Accidents
Proper Boiler Care Makes Good Business Sense:Safety Precautions for Drycleaning Businesses
Putting a Stop to Steam Kettle Failure
Quick Actuating Closures
Quick-Actuating Door Failures
Real-Time Radioscopic Examination
Recommendations For A Safe Boiler Room
Recovering Boiler Systems After A Flood
Rendering Plants Require Safety
Repair or Alteration of Pressure Vessels
Residential Water Heater Safety
School Boiler Maintenance Programs: How Safe Are The Children?
Secondary Low-Water Fuel Cutoff Probe: Is It as Safe as You Think?
Short-Term High Temperature Failures
Specification of Rupture Disk Burst Pressure
Steam Traps Affect Boiler Plant Efficiency
Steps to Safety: Guide for Restarting Boilers after Summer Lay-Up
Stress Corrosion Cracking of Steel in Liquefied Ammonia Service - A Recapitulation
Suggested Daily Boiler Log Program
Suggested Maintenance Log Program
System Design, Specifications, Operation, and Inspection of Deaerators
Tack Welding
Temperature And Pressure Relief Valves Often Overlooked
Temperature Considerations for Pressure Relief Valve Application
The Authorized Inspector's Responsibility for Dimensional Inspection
The Effects of Erosion-Corrosion on Power Plant Piping
The Forgotten Boiler That Suddenly Isn't
The Trend of Boiler/Pressure Vessel Incidents: On the Decline?
The Use of Pressure Vessels for Human Occupancy in Clinical Hyberbaric Medicine
Thermally Induced Stress Cycling (Thermal Shock) in Firetube Boilers
Top Ten Boiler and Combustion Safety Issues to Avoid
Typical Improper Repairs of Safety Valves
Wasted Superheat Converted to Hot, Sanitary Water
Water Maintenance Essential to Prevent Boiler Scaling
Water Still Flashes to Steam at 212
Welding Consideration for Pressure Relief Valves
Welding Symbols: A Useful System or Undecipherable Hieroglyphics?
What Should You Do Before Starting Boilers After Summer Lay-Up?
Why? A Question for All Inspectors


Recovering Boiler Systems After A Flood


August 1993 Infoletter  

Category: Operations

Summary: The following article is a part of the National Board Classic Series, and it was published in the National Board BULLETIN. (3 printed pages)

 


 

The article below, originally published in the August 1993 National Board Infoletter, was written to aid in the recovery of boiler systems affected by flooding.

After the waters recede, people will begin the long process of cleaning and restoring their property. The following information is provided to assist in recovery of boiler systems affected by the flooding.

  1. Safety of the personnel performing inspections and repairs is the highest priority. Flood waters contain many hazardous chemicals and bacteria, therefore personnel safety procedures should be developed and enforced.
     
  2. All utilities in the boiler room should be turned off until inspection and necessary repairs of the individual systems allow reactivation.
     
  3. A careful visual inspection of the entire boiler system should be made, both internal and external, with notations of obvious problems and any special equipment or personnel needed to facilitate repairs.
     
  4. Keep in mind that some equipment may only be repaired by the original manufacturer or its licensed agents in order to maintain warranties and/or certification.
     
  5. The boiler setting or foundation should be examined closely to determine if it has been weakened or undermined. Any movement of the boiler or building will have an adverse effect on piping and other equipment connected to both the boiler and building structure.
     
  6. Waterlogged insulation will hasten external corrosion of boilers and pipes. If removal is deemed necessary, remember that asbestos is still present in many boiler rooms and requires handling by specially licensed personnel. If the insulation is left in place and the boiler is fired before thoroughly drying, steam can be generated within the insulation layers thereby creating the potential for explosive damage to the external lagging.
     
  7. Refractory and fire brick should be checked for deterioration or loosening.
     
  8. Feedwater and condensate return systems should be thoroughly cleaned of any mud, silt or debris. After the boiler is put back in operation, the water quality should be checked often for contamination of any kind.
     
  9. Pressure relief devices should be checked for corrosion or any damage which could cause binding and failure to operate. Only qualified personnel should perform disassembly or repair of a pressure relief device. Some jurisdictions require this work to be performed by a company holding the National Board "VR" symbol stamp. The outlet and discharge line of the pressure relieving device should be inspected for blockage.
     
  10. All drains and blow-off lines should be inspected to ensure there is no blockage by debris.
     
  11. Electric/electronic controls should be evaluated for replacement or repair as needed. Flame safeguard controls, ignition transformers and safety shut off valves on the fuel system which have the potential for causing furnace explosions should be replaced. Other fuel system components should be drained and cleaned or replaced as necessary. All work performed on the fuel system and safety devices must comply with jurisdictional requirements.
     
  12. All electric motors and wiring should be inspected closely to determine if repair or replacement is necessary. All electrical work must comply with jurisdictional requirements.
     
  13. Check to make sure air inlets and exhaust stacks are clear of any blockage and are not damaged. 

The items listed above are not intended to be all inclusive, since boiler systems and equipment vary in design and operation. However, this list could be used as a catalyst to developing individual inspection and repair guidelines to fit many systems affected by the flooding.

This article was inspired by information obtained from various sources. We would like to acknowledge The Locomotive, published by Hartford Steam Boiler Inspection and Insurance Company, and the National Board technical staff.

 


 

 

Editor's note: Some ASME Boiler and Pressure Vessel Code requirements may have changed because of advances in material technology and/or actual experience. The reader is cautioned to refer to the latest edition of the ASME Boiler and Pressure Vessel Code for current requirements.







About Us   |  Get Directions   |  Contact Us   |   Disclaimer   |   Logo & Marks Policy   |   Privacy Statement   |   Terms of Use   |   Site Map

Copyright 2017 The National Board of Boiler and Pressure Vessel Inspectors | 1055 Crupper Avenue Columbus, OH 43229 Ph.614.888.8320