Some necessary inspection items on cranes in ZZHZ are listed for your reference, they are excerpted from the third-party inspection instructions and totally meet the demand of third-party.

(1)    Main checking points for main steel structure

1.       chemical composition and mechanical property test

2.       cutting

3.       welding technology and skill

4.       ultrasonic test for non destructive welding

5.       dimension inspection

6.       proof loading test

(2)    Main checking points for hook

1.       heat treatment mechanical property test

2.       machining surface quality inspection

3.       dimension inspection

4.       proof loading test

5.       melting chemical composition

(3)    Main checking points for gearbox

1.       Leakage test

2.       inspection after assembly

3.       chemical composition and mechanical property test

4.       cutting

5.       welding technology and skill

6.       ultrasonic test for non destructive welding

7.       dimension inspection

(4)    Main checking points for wheel, rope, wire rope and drum

1.       raw material chemical composition and mechanical property test

2.       visual inspection on surface quality

3.       function test for assembly

 

4.       packing inspection