Quality Inspection and Assurance
Jinsh Company built up an integrated system of supervision & control, measuring & testing equipment, and quality assurance from raw materials, semi-finished goods to finished goods.
We have gone through the GB/T 19001-2016/ISO 9001:2015 quality system certification. International standard on management has been achieved in production management, quality control, safe operation, technology development, occupational health, product sales, logistic statistics and customer service.
Production inspection and delivery inspection
TEST ONE-Take sample of raw materials;
TEST TWO-Purchase qualified raw materials;
TEST THREE-Put in storage Calcining of petroleum coke;
TEST FOUR-Put in storage Calcined coke crushed to powder;
TEST FIVE-Pitch preparation test Pitch processing;
TEST SIX-Cool material test Batching Kneading;
TEST SEVEN-Forming test First Baking;
TEST EIGHT-Impregnation Second Baking;
TEST NINE-Graphitization test Machining;
TEST TEN-Finished product storage;
TEST ELEVEN-Packing Deliver goods.
Inspection details of production process
Type | Sort | Test Iterms | Test Standard | Use Instrument |
Petroleum coke | volatiles | SH/T0026—1990 | Furnace, balance, crucible | |
ash content | SH/T0029—1990 | Muffle furnace, balance, crucible | ||
moisture | SH/T0032—1990 | Oven, crucible, balance | ||
actual density | SH/T0336—1990 | Furnace, crucible, density bottle, thermometer | ||
Main Material Inspection | Coal pitch | softening point | GB/T2294—1997 | Thermometer, electric furnace, molten sample spoon, air bath |
Toluene insoluble matter content | GB/T2924—1997 | Tester, drawer cylinder, condenser, calculating instrument | ||
QI content | GB/T2292—1997 | Beaker, dryer, vacuum pump, centrifugal pump, balance, screen | ||
ash content | GB/T2295—1997 | Furnace,dryer, balance, steam dish | ||
volatiles | GB/T2001 | Crucible, furnace, balance, dryer | ||
moisture | GB/T2288 | Crucible, furnace, balance, dryer | ||
Metallurgical coke | ash content | GB/T2001 | Crucible, furnace, balance, dryer | |
sulfur content | GB/T2286 | Furnace,dryer,balance,steam dish | ||
volatiles | GB/T2001 | Balance, furnace, dryer, beaker | ||
moisture | GB/T2001 | Crucible, furnace, balance, dryer | ||
Product Inspection | Graphite electrode | resistance | YB/T120-1997 | Oven,dryer,balance,weighing bottle |
flexural strength | GB/T3074 | Compression testing machine, long ruler, testing jig, tester, dryer | ||
young's modulus | GB/T3074.2-82 | Material testing machine, cursor length | ||
actual density | GB/T6155-1985 | Transducer, rack,balance, long ruler | ||
CTE | GB/T3074.4-82 | Balance, oven, cursor length | ||
ash content | GB/T1429-85 | Balance, ark, crucible, furnace |