The following plant service bulletins (PSBs) can be downloaded in portable document format (PDF) or can be ordered free of charge for delivery to you via postal mail.
PSB#56
E and EL Pulverizer Bottom Ring Assembly
This PSB advises owners and operators of B&W E and EL pulverizers of a revised recommendation for checking the bottom ring and yoke seating surfaces.
PSB#55
Corrosion-Fatigue Failures of Riser Tube Bends
This PSB serves as a safety alert warning advising boiler owners and operators of the immediate need to inspect riser and supply tube bends for evidence of corrosion-fatigue damage on the inside of these bends and to undertake immediate replacement of damaged tubing. (1346K)
PSB#54
Feedwater Pipe Thinning and Rupture
This PSB is a safety alert that advises boiler owners and operators of the need to inspect feedwater piping for evidence of wall thinning. (499K)
PSB#53
Roll Wheel Pulverizer Oil
This PSB advises owners and operators of roll wheel pulverizers on the latest recommendations for roll wheel oil lubricants. This bulletin applies to all mill sizes. (703K)
PSB#52
Master Hand Hole (MHH) Plug Welding Recommendations
This PSB advises owners and operators of B&W equipment on the recommended seal welding procedure for Master Hand Hole (MHH) plugs. (773K)
PSB#51
Lower Convection Pass Casing Enclosure and Economizer Hoppers
This PSB advises owners and operators to inspect the lower convection pass casing enclosure and economizer hopper supports for damage due to erosion, corrosion, excessive ash accumulation or abnormal temperature variations. It also recommends that ash level instrumentation be added to all economizer ash hoppers to avoid overfilling them. (1147K)
PSB#50
Convection Pass Lower Header Closure Plate Cracking
This PSB advises owners to inspect for cracks in closure plates and wall tubes located in the convection pass lower header area of UP and RB boilers. (431K)
PSB#49
Steam-Cooled Spacer Tube Related Cracking of Secondary Superheater Outlet Headers
This PSB advises owners and operators of B&W drum and once-through coal-fired boilers, equipped with secondary superheater steam-cooled spacer tubes, to inspect the secondary superheater outlet header internal surfaces for cracks in the vicinity of the steam-cooled spacer tube entries. (374K)
PSB#48
Pulverizer Roll Wheel Silicone O-Rings and the Use of Synthetic Oils
This PSB advises owners and operators of roll wheel pulverizers of a possible problem with silicone O-rings when using synthetic oils in the roll wheels. (400K)
PSB#47
Feedwater Pipe Thinning
This PSB advises to inspect and test intermediate temperature feedwater piping for internal wall thinning. (577K)
PSB#46
Square Lower Sidewall Headers in Stoker Units
This PSB advises owners and operators of stoker-fired boilers with square lower sidewall headers to inspect these headers for possible cracking. (499K)
PSB#45
E and EL Pulverizer Springs
This PSB advises owners and operators of E and EL pulverizers to inspect dual purpose springs. The dual purpose spring serves two functions: 1) pre-loads the grinding elements, and 2) prevents the upper grinding ring from rotating. (461K)
PSB#44
Chemical Cleaning Guide
This PSB provides guidelines to owners and operators on when to chemically clean boilers and steam generating equipment. (155K)
PSB#43
Refractories, Plastics, Insulation or Textiles Containing Chromium Compounds
The original version of this Plant Service Bulletin was issued in April of 1990 to alert owners and operators of boilers and steam generators that certain materials containing chromium may, under certain operating conditions, produce hexavalent chromium (Cr+6), a carcinogen. It also suggested remedial action and substitute materials. The initial issue of PSB-43 pertained only to chromium-containing refractories. This updated bulletin includes other materials containing chrome such as plastics, insulation and textiles. (454K)
PSB#42
Spiral Bevel Gear Bolts Roll Wheel Pulverizer - Gearbox
This PSB alerts owners and operators of roll wheel pulverizers of a possible problem with the bolts on the spiral bevel gear. (474K)
PSB#41
UP Boiler Mix Stud Plate Cracking
This PSB advises customers to inspect for cracks in wall tubes located in the furnace enclosure mix areas of Universal Pressure (UP) boilers that were designed prior to 1973. (272K)
PSB#40
Drain Stub Bore Hole Cracking
This PSB alerts customers to inspect drain line stub bore holes for radial cracking. (783K)
PSB#39
E/EL Pulverizer Bottom Ring Lifting Clamp
This PSB alerts customers on safety procedures when using the B&W bottom grinding ring lifting clamp for E/EL pulverizers. (333K)
PSB#38
Roll Wheel Pulverizer Loading Rods/Cables
This PSB alerts customers to inspect the loading rods and cables on roll wheel pulverizers. (346K)
PSB#37
Reheaters: Out-of-Service Corrosion
This PSB advises customers of the potential for out-of-service corrosion damage in reheaters, which may cause forced outages and reduced reliability. (715K)
PSB#36
Economizer Hoppers
This PSB advises customers of the importance of inspecting economizer hopper supports. (597K)
PSB#35
Flashtanks
This PSB advises customers to inspect flashtanks and associated piping installed in once-through boiler bypass systems. (334K)
PSB#34
Once-through Boiler Bypass Stop Valves (B&W 200)
This PSB alerts customers to a potential problem with the once-through (UP) boiler bypass stop valves (B&W 200) and provides a recommended solution for the problem. (407K)
PSB#33
Burners
This PSB alerts customers to known mechanical problems with burners and provides recommended corrective actions. (1192K)
PSB#32
Oil Lighters (Steam/Air Atomized)
This PSB alerts customers to potential oil lighter problems, identifies probable causes, and provides solutions for improving operation. (1502K)
PSB#31
Mechanical Oil Lighters
This PSB advises customers of potential problems, identifies probable causes, and provides solutions for resolving problems associated with mechanical oil lighters. (777K)
PSB#30
High Energy Ignitor System & Lighter Controls
This PSB lists common problems, probable causes and recommended solutions for high energy ignitor systems and oil lighter controls. (827K)
PSB#29
Stress-Assisted Corrosion: Boiler Waterside
This PSB provides information and recommendations concerning waterside corrosion of boiler tubing; with emphasis on recovery boilers due to the potential hazards associated with tube leaks. (1074K)
PSB#28
Membraned Wall Corner Tube Failures
This PSB provides information for preventing membraned wall corner tube failures. (688K)
PSB#27
UP Boiler Downcomer Strainers
This PSB advises customers to inspect for deterioration of downcomer strainer baskets. (717K)
PSB#26
Tube Thickness Evaluation Repair or Replacement Guideline
This PSB assists customers in evaluating existing boiler tube wall thicknesses and defining when repair or replacement is recommended. (453K)
PSB#25
Boiler Water Phosphate Chemistry
This PSB re-emphasizes to all utility boiler operators the potential chemistry control problems that can lead to serious furnace tube corrosion. Monitoring boiler water chemicals has always been necessary. However, units operating at high drum pressures require even closer monitoring. (673K)
PSB#24
Spray Attemperators for Industrial Boilers
This PSB advises owners and operators of known superheater attemperator problems and provides recommendations for corrective action. (1270K)
PSB#23
Welded Plate Elbows in High Temperature Applications
This PSB advises customers of the potential for steam leaks and rupture at the longitudinal weld joints in high temperature steam piping. It also advises customers that they may have welded plate elbows installed in the high temperature components of their steam lines. (297K)
PSB#22
Economizer Inlet Header Cracking
This PSB advises owners and operators to inspect economizer inlet headers. Inspections have sometimes revealed cracking on the inside diameters of tube stubs and header bore holes. (526K)
PSB#20
UP Boiler Furnace Protection
This PSB provides customers with additional instructions for start-up firing and cool-down rates for once-through UP boilers. (223K)
PSB#19
Roll Wheel Pulverizer Shaft Retainer Bolt
This PSB advises customers about problems experienced with retainer bolts breaking on roll wheel shafts. (470K)
PSB#18
Ligament Cracking of 2-1/4Cr-1Mo (SA-335 P22)
This PSB advises customers to inspect superheater and reheater outlet headers made of 2-1/4Cr-1Mo (SA-335 P22) material. (693K)
PSB#17
Threaded Connections on HIgh Temperature Applications
This PSB advises customers of problems encountered with threaded connections (radiograph plugs, thermowells, drains or pressure connections) in high temperature applications. (457K)
PSB#16
Pulverized Fuel System Fires
This PSB advises customers and field personnel of additional recommendations concerning pulverizer fuel system fires. This supplements information provided in PSB-10. These recommendations include fire detection systems, actions to be taken when a fire occurs, inerting systems for various coal classifications and fire extinguishing procedures for air swept pulverizer systems. (659K)
PSB#15
Spray Attemperators
This PSB advises customers and field personnel about superheater attemperator problems and provides recommendations for corrective action. (749K)
PSB#13
Roll Wheel Pulverizer Low-Speed Shaft Cover
This PSB advises customers of the potential problem associated with corrosion of the roll wheel pulverizer gear-reducer low-speed shaft cover as a result of pulverizer operation and maintenance. (526K)
PSB#12
Subcooling in Cycling Boilers
This PSB provides information concerning possible furnace tube failures caused by subcooling in drum type (RB) boilers that are subject to cycling operation. It also provides recommendations for preventive action on a particular boiler. (146K)
PSB#11
Rothemuhle Air Heater Sootblower Spherical Swivel Joints
This PSB advises owners and operators of the possibility of cap screws coming loose. (461K)
PSB#10
Pulverized Fuel System Fires
This PSB advises of the potential hazards of fires that may result in air-swept pulverized-fuel systems. (417K)
PSB#9
Rothemuhle Air Heater Core Door
This PSB advises owners and operators that the core access door must be closed and secured properly. (492K)
PSB#8
Roll Wheel Pulverizer - Viking Lube Oil Pumps
This PSB advises owners and operators on causes of oil pressure problems with Viking 124 and 125 Lube Oil Pumps used with roll wheel gearboxes. (476K)
PSB#7
Thermal Quenching of Hopper Tubes
This PSB provides information on potential causes for furnace hopper tube failures. (178K)
PSB#6
ITT Grinnell Constant Support Hangers
This PSB advises customers of a possible problem with ITT Grinnell constant support spring hangers. (281K)
PSB#5
Rothemuhle Air Heater Collar Seal Shoe Hang-Up
This PSB advises of the potential for collar seal shoe hang-up as a result of air heater water washing. Collar seal shoe hang-up will lead to increased air heater leakage and fan power consumption. (477K)
PSB#4
Roll Wheel Pulverizer Assembly O-Ring Sizing
This PSB advises owners and operators of a possible problem when using undersized O-rings during roll wheel rebuilds. (284K)
PSB#3
Roll Wheel Pulverizer Assembly Pivot Block Orientation
This PSB advises of a potential problem with incorrectly installed roll wheel pivot blocks. (457K)
PSB#2
Out-of-Service Corrosion Failure of Horizontal Downcomer, Supply and Riser Pressure Part Connections
This PSB provides awareness of the corrosion failure of horizontal downcomer, supply and riser pressure part connections. (947K)
PSB#1
Creep Fatigue and Ligament Cracking of 1-1/4 Cr-1/2 Mo-Si (T11 and P11) Pressure Parts
This PSB provides awareness of creep swelling and ligament cracking of 1-1/4 Cr-1/2 Mo-Si (T11 and P11) pressure parts. (354K)
