TDF-E316L(B) / CO2
TDF-E316L(B) / CO2 by Shandong Tengda Special Steel Wire Technology Co., Ltd.. DNV TA certificate TAW000061V.
Inspector Detail
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Common issues
- Data note: this listing is categorised as 'Rotary Vane Steering Gear', but the manufacturer (a special steel wire/welding consumable producer) and the product code TDF-E316L(B)/CO2 identify a stainless steel welding wire/electrode (316L grade, CO2-shielded process), not a steering gear component. The points below address the actual product - a welding consumable, not a machine.
- Moisture pickup in flux-cored/covered wire leading to porosity in the weld
- Incorrect shielding gas flow or contamination during CO2-shielded welding causing porosity
- Wire feed issues (birdnesting, inconsistent feed) with solid wire spools
- Batch/heat traceability records not retained after use on class-relevant repairs
- Storage beyond shelf life or in humid conditions degrading weld quality
Inspection checklist
- Verify the DNV Type Approval certificate (TAW000061V) and expiry before use on class-relevant work
- Check batch/heat number traceability against the certificate
- Confirm correct storage (sealed packaging, dry, controlled temperature) prior to use
- Verify welder qualification covers this consumable/process combination (316L, CO2/MAG)
- Inspect completed welds per the applicable procedure (visual, and NDT where specified)
- Confirm shielding gas purity and flow rate for the CO2 process at time of use
Service intervals
| Certificate/expiry check | before each use on class-relevant repair work |
| Stock rotation (FIFO) and storage condition check | at each stores inventory, typically quarterly |
Critical spares
- This is a consumable stock item, not a machine with spare parts - the points below are stock items to keep on hand, not spares
- Correct-grade (316L) wire/electrode stock in the diameters actually used aboard
- Matching CO2 or Ar/CO2 shielding gas cylinders for the process
- Contact tips and liners for the wire feed gun, sized to the wire diameter in use
- Dedicated stainless-only wire brushes and grinding discs to avoid carbon steel contamination
- Sealed, dry storage container/cabinet to protect opened packs from moisture pickup
Safety
- Welding fume exposure, including hexavalent chromium from stainless steel welding - use fume extraction and appropriate respiratory protection
- CO2 shielding gas can displace oxygen in confined/enclosed spaces - ventilate and monitor
- Arc flash/UV exposure and hot metal burns during welding operations
Class survey
As a welding consumable, this item is not itself a Continuous Survey Machinery component. Class relevance is through the DNV Type Approval of the consumable and the qualified welding procedure/welder used for any structural or pressure-part repair - keep the certificate and batch traceability with the repair records for survey.
Components & Design
Component data being added…
Technical Data
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Maritime Network →DNV type approval
Verified against the DNV Approval Finder — the certificate below is issued by DNV, not by us.
- Certificate
- TAW000061V