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Thermanit 20/16 SM / M12

General Welding Consumables · Welding Consumables

Class-certified type (DNV register) · technical data sheet not yet verified

Thermanit 20/16 SM / M12 by voestalpine Böhler Welding Germany GmbH. DNV TA certificate TAW00005US.

Inspection

Inspector Detail

Common issues

  • Moisture pickup in electrode coating or flux leading to hydrogen-induced cracking risk
  • Incorrect storage (humidity, temperature) degrading consumable condition
  • Use outside the approved welding position or process range
  • Porosity from contaminated base metal or inadequate re-drying
  • Mismatch of consumable to base material on dissimilar joints, risking cracking or reduced corrosion resistance
  • Loss of batch/heat traceability, jeopardising weld procedure qualification records
  • Use beyond approved shelf life or opened-package exposure limit without re-drying

Inspection checklist

  • Verify batch/heat certificate matches DNV Type Approval TAW00005US and the applicable WPS
  • Check storage conditions against manufacturer requirements (heated cabinet/holding oven)
  • Confirm re-drying procedure was followed before use
  • Visual check of coating/wire surface for damage, rust or contamination
  • Confirm consumable is within shelf life and opened-package exposure window
  • Cross-check that the WPS approval covers this consumable
  • Verify welder qualification covers this consumable and process
  • Retain batch number traceability in the weld/repair log for class review

Service intervals

Re-drying before use (low-hydrogen types)per manufacturer instruction, generally required if exposed beyond stated ambient time
Holding oven temperature checkeach shift/use
Stock rotation (FIFO) and shelf-life reviewannual
Holding/drying oven calibrationper equipment maintenance schedule

Critical spares

  • Spare stock of the same certified batch/heat to maintain WPS continuity for an ongoing repair
  • Calibrated hygrometer/thermometer for the storage or holding cabinet
  • Spare holding oven or heated quiver for site use if welding away from the main store

Safety

  • Fume inhalation from high-alloy stainless welding, including hexavalent chromium exposure - use fume extraction/PPE
  • Fire and electric shock hazards during welding
  • Hydrogen embrittlement risk in the weld if storage/re-drying procedure is not followed
  • Confined space welding requires forced ventilation and gas monitoring
  • Arc flash/UV exposure to eyes and skin

Class survey

DNV Type Approval certificate TAW00005US must be current and specifically matched to the WPS/PQR being used. Class surveyors check consumable certificates against welding procedure documentation for repair and newbuilding work, and require batch traceability. As a high-alloy stainless combination (20Cr/16Ni type per designation), re-drying and storage records may be requested by the surveyor. Note: critical_spares, typical_wear_limits and estimated_lifetime_hours are omitted - this is a consumable filler metal, not a machinery component, and those fields do not meaningfully apply.

Classification

DNV type approval

Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.

CertificateTAW00005US
Open the certificate at DNV
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