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

TypeSortTest ItermsTest StandardUse Instrument
Petroleum
coke
volatilesSH/T0026—1990Furnace, balance, crucible
ash contentSH/T0029—1990Muffle furnace, balance, crucible
moistureSH/T0032—1990Oven, crucible, balance
actual densitySH/T0336—1990Furnace, crucible,
density bottle, thermometer
Main
Material
Inspection
Coal
pitch
softening pointGB/T2294—1997Thermometer, electric furnace, molten sample spoon, air bath
Toluene
insoluble
matter content
GB/T2924—1997Tester, drawer cylinder, condenser, calculating instrument
QI contentGB/T2292—1997Beaker, dryer, vacuum pump, centrifugal pump, balance, screen
ash contentGB/T2295—1997Furnace,dryer, balance, steam dish
volatilesGB/T2001Crucible, furnace, balance, dryer
moistureGB/T2288Crucible, furnace, balance, dryer
Metallurgical
coke
ash contentGB/T2001Crucible, furnace, balance, dryer
sulfur contentGB/T2286Furnace,dryer,balance,steam dish
volatilesGB/T2001Balance, furnace, dryer, beaker
moistureGB/T2001Crucible, furnace, balance, dryer
Product InspectionGraphite
electrode
resistanceYB/T120-1997Oven,dryer,balance,weighing bottle
flexural
strength
GB/T3074Compression testing machine, long ruler, testing jig, tester, dryer
young's
modulus
GB/T3074.2-82Material testing machine,
cursor length
actual densityGB/T6155-1985Transducer, rack,balance, long ruler
CTEGB/T3074.4-82Balance, oven, cursor length
ash contentGB/T1429-85Balance, ark, crucible, furnace