Metallurgical Services

POWER REFINING PULP & PAPER

Failure Analysis

  • Visual inspection
  • Dimensional and hardness measurements
  • Metallography
  • Scale thickness/oxide/pit measurement(s)
  • Establish failure mechanism
  • Recommend corrective action

 

       

Basic Boiler Tube Analysis

  • Visual inspection
  • Dimensional and hardness measurements
  • Metallography
  • Scale thickness/oxide/pit measurement(s)
         

Life Assessment

  • Visual inspection
  • Dimensional and hardness measurements
  • Metallography
  • Scale thickness/oxide/pit measurement(s)
  • Larson Miller Parameter evaluation for steam-touched tubes only
         

Mill Re-Certification- Mechanical Properties

  • Visual inspection
  • Metallography
  • Material Verification
  • Mechanical Testing (Flaring/Flattening/Tensile)
  • Dimensional and hardness measurements
         

 Weld Analysis 

  • Visual Inspection
  • Metallography
  • Condition of the attachment/pad welds
  • Illustrate any weld defects
         

ID Deposit Weight Density (DWD)

  • Deposit removed and weighed using ASTM and NACE standards to determine need for boiler cleaning
  • Separate measurements for hot and cold sides
         

ID Deposit Analysis

  • Elemental analysis by energy dispersive spectroscopy (EDS)
  • Analysis via ion chromatography (IC) for soluble ions
         
             

OD Deposit Analysis

  • Elemental analysis by energy dispersive spectroscopy (EDS)
         

Scanning Electron Microscopy

  • Fracture surface examination, analysis of inclusions or foreign material, coatings, morphology of oxide and deposits, frequently needed as part of a failure analysis
           

Material Verification

  • Optical emission spectroscopy (OES) for composition compared to ASME standards
           
             

Replication Assessment

  • Reveals presence of creep and similar degradation at  the surface of  high-energy components
         

Mechanical Testing

  • Quantify properties including yield strength, ultimate tensile strength (UTS), elongation, and reduction in area
  • Hardness values utilizing Rockwell B equipment and/or Vickers Microhardness
  • Charpy test for toughness
  • Flaring and flattening formability tests
     
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