Recently, the e-commerce platform of State Grid Corporation of China released the Notice of State Grid Anhui Electric Power Co., Ltd. on the Handling of Suppliers' Bad Behaviors（ two thousand and nineteen year six Month). The processing results show that the insulation shrinkage of cable samples from a cable enterprise in Jiangsu is found unqualified through sampling inspection, and the bid winning qualification is suspended in the bidding procurement activities of State Grid Anhui Electric Power Co., Ltd two Months.
Similar things happen from time to time, and the bid suspension seems to be an inevitable problem for some enterprises. However, for enterprises, being suspended is not only an economic loss, but also a damage to the reputation of enterprises. How to prevent problems before they occur, how to conduct self inspection and self inspection, and how to improve oneself before the products are found unqualified? Check the cable enterprise's self inspection eight Large process and forty-six Quality inspection points!
one Stranding process
one Check the diameter of single wire before putting it on line, and the diameter deviation of single wire must be within the range specified by the process;
two . Check the appearance quality of the single line, which should be smooth and clean, free of oil stain, serious mechanical damage, and no serious oxidation of the copper wire;
three Check whether the selected pressing wheel, wood mold and steel mold meet the process requirements;
four . Check the number, arrangement, stranding pitch and stranding direction of single stranded wires, which shall comply with the process regulations;
five . Check the geometric dimensions of the stranded compression core, which should conform to the process regulations;
six . Check the appearance quality of the wire core, which shall be compact and round, without damage to the burrs and sharp edges of the insulation layer, and without raised and broken single wires;
seven Check the single line joint, which must be welded, and the distance between two joints shall not be less than 300mm ；
eight Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
two Insulation process
one Check whether the selected mold meets the process requirements;
two . Check the thickness of the insulation layer. The average value of six points and the thinnest point shall comply with the process regulations;
three Check the identification mark of insulated wire core, and the colored mark shall be clear in color; The digital signs are clear and wear-resistant; The identification of finished cable shall be clear and continuous, and the content shall meet the requirements of process and plan;
four . Check the quality of the insulation layer. It is required that the insulation layer should be plasticized well, the appearance should be smooth, and there should be no visible bubbles, impurities, and cracks;
five . Check the extrusion quality. The insulation layer shall be tightly extruded on the conductor, and there shall be no flattening, bruise, bulge, loose sleeve or crease;
six Check the implementation of spark test. It is required that all insulated wire cores must pass spark test and the applied test voltage should comply with the process regulations;
seven Insulated wire cores that have been broken down by spark test must be rewound and repaired, and spark test must be carried out again, otherwise they are not allowed to flow down.
eight Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
three Cross linking process
one Check whether the selected mold meets the process requirements;
two . Check the thickness of the inner and outer semiconductors, and the thinnest point shall comply with the process regulations;
three . Check the insulation thickness. It is required to check each axle of cable, and its average value and thinnest point shall comply with the process regulations;
four Each axle of cable shall be subject to cross-linking test, and the test results shall comply with the process regulations;
five . Check the appearance quality of the insulation layer. It is required that the surface should be flat, free of knots, bubbles and impurities;
six Check the surface quality of the external semiconductor, which shall be smooth and flat without impurities, wrinkles and scratches.
seven Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
four Shielding process
one . Check the number, direction and overlap rate of copper tape wrapping layers, which should conform to the process regulations;
two . Check the wrapping quality, which shall be flat and tight, without wrinkles, curling, missing wrapping and bumping defects;
three Check the copper strip welding quality, and the copper strip joint must be welded;
four Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
five Cabling process
one Check the arrangement, pitch and direction of the insulated cable cores to ensure that they meet the process requirements;
two Check the specifications, dimensions, layers and wrapping methods of the wrapping tape, which should conform to the process regulations;
three . Check the appearance quality after cabling, and ensure that the wrapping belt is tight and free of any fold, damage or missing wrapping; The filling shall be full, the cable appearance shall be round, and the out of roundness shall meet the process requirements.
four Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
six Spacer sleeve
one Check whether the selected mold meets the process requirements;
two . Check the thickness of the isolation sleeve, and the thinnest point shall comply with the process regulations;
three . Check the appearance quality of the isolation sleeve, which shall be round and free of loose sleeve, bulge and leakage;
four Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
seven Kaining process
one Check the specifications, dimensions, layers, wrapping direction and wrapping clearance of the steel strip, which shall comply with the process regulations;
two Check the welding quality of the steel strip. It is required that the steel strip joints must be welded, and the joints should be flat and firm, without burrs, warping edges, and holes;
three Check the wrapping quality and ensure that it is round and tight without any missing wrapping;
four Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
eight Outer sheath
one Check whether the selected mold meets the process requirements;
two . Check the thickness of the sheath, and the thinnest point shall comply with the process regulations;
three . Check the quality of the protective layer, and there shall be no poor plasticization, burning, bubbles, and impurities;
four Check the appearance of the sheath. It is required that the sheath shall be tightly squeezed on the cable core, and the surface shall be round and smooth without flattening, loosening, bulging, missing and scratching;
five Check the cable identification marks, which shall be clear and continuous, and the contents shall meet the requirements of the process and plan;
six Check the implementation of spark test. It is required that the outer sheath of armored cable must pass the spark test, and the test voltage meets the process requirements;
seven Check the quality of cable arrangement and ensure that it is flat without crossing or stacking.
