1. Sheath thickness: Outer diameter before extrusion x 0.035+1 (compliant with)power cableThe nominal thickness of the sheath for single core cables should not be less than 1.4mm, and the nominal thickness for multi-core cables should not be less than 1.8mm
2. Online measurement of sheath thickness: sheath thickness=(circumference after sheath extrusion - circumference before sheath extrusion)/2 π
Or sheath thickness=(circumference after extrusion sheath - circumference before extrusion sheath) × 0.1592
3. Thin insulation thickness: nominal value x 90% -0.1
4. Thin point of single core sheath: nominal value × 85% -0.1
5. Thin point of multi-core sheath: nominal value x 80% -0.2
6. Steel wire armor: quantity=
{π× (outer diameter of inner sheath+wire diameter) ÷ (wire diameter × λ)
Weight=π × wire diameter 2 × ρ × L × number of wires × λ
7. Weight of insulation and sheath=π× (outer diameter before extrusion+thickness) × thickness × L × ρ
8. Weight of steel strip={π× (outer diameter before wrapping+2 × thickness -1) × 2 × thickness × ρ× L}/(1+K)
9. Weight of the packaging tape={π× (outer diameter before wrapping+number of layers × thickness) × number of layers × thickness × ρ× L}/(1 ± K)
Among them, K is the overlap rate or gap rate. If it is overlap, it is 1-K; if it is gap, it is 1+K
ρ is the specific gravity of the material; L is the length of the cable; λ twisting coefficient