| 1 | Dimensional accuracy | Confirm nominal diameter of 200 mm and length of 1,800 mm, together with agreed diameter, length, straightness, and end-face tolerances. | Product drawing, inspection method, and batch measurement report. | Critical |
| 2 | Grade and intended application | Check that the offered grade and electrode design suit the furnace process, operating conditions, and connection system; do not assume grade equivalence from size alone. | Grade specification, application guidance, and written confirmation of the proposed grade. | Critical |
| 3 | Physical and electrical properties | Compare the quoted limits for properties such as bulk density, electrical resistivity, flexural strength, and coefficient of thermal expansion. Values depend on grade and manufacturing specification. | Current technical data sheet and representative test results, with units and test methods stated. | Critical |
| 4 | Threading and nipple compatibility | Verify the connection type, thread dimensions, machining quality, and compatibility with the intended nipple or electrode system. | Connection drawing, thread inspection details, and confirmation of matching components. | Critical |
| 5 | Quality control and traceability | Check how the supplier controls incoming materials, production, machining, final inspection, and identification of each shipment lot. | Quality-system documentation, inspection plan, sample certificate, and batch-traceability example. | High |
| 6 | Packaging and transport protection | Assess protection against impact, moisture, and handling damage; confirm packing suits the transport route and unloading method. | Packaging specification, loading photographs or plan, and written damage-claim procedure. | High |
| 7 | Delivery, commercial terms, and support | Compare confirmed production and transit lead times, minimum order quantity, quotation validity, payment terms, delivery terms, and response to quality claims. | Itemized quotation, delivery schedule, applicable Incoterms, and written warranty or claims terms. | High |