1. Both side of all the steel plate of crane are pretreatment by pretreatment production line,

Sand blasting-- Primer spray--Primer drying. Eliminate the innerstress of steel plate, increase the adhesive force of the steel structure. Ensure the appearance and anticorrosion quality.

2. Steel plate cutting adapt whole sets Messer CNC plasma cutting machine from Germany, very fast cutting speed, little deformation, High precision,  Deviation could be controlled within 1mm, it insure the raw material at high quality standard and can reach top level in the industry.

3. The welding of main beam adapt high efficiency and intelligent welding robot, Weihua are No.1 enterprise who adapt this high technology machine. The welding joint inside of the main beam adapt advanced MAG welding, adapt Ar+CO2 mixed protective gas, The 4 welding joint outside of the main beam adapt automatic submerged-arc fillet welding machine.

4. The welding of main beam adapt radiographic inspection and ultrasonic flaw detection for the welding joint and fillet weld position

5. The welding of end beam adapt double gun gantry submerged arc welding, highly welding quality ensure the stable quality of the crane effectively.

6. Adapt the steel plate rolling drum and wireless steel tube, Weihua has a set of steel plate rolling drum producing and processing line which is industry-leading level. From pre-bending by 1250t press machine, to Edge rolling by three-roller plate roll, at last the longitudinal joint and circumferential joint of drum are welded by automatic welding center and drum processed by heavy duty CNC horizontal machine tool.    

7. The wheel and wheel axle and treating by high efficiency quenching and tempering, it can eliminate the internal stress effectively and ensure the processing precision,

The trolley frame, drum, and bogie frame and related big welding structure are treated by Annealing in the natural gas annealing furnace to ensure the Machining accuracy after welding. Weihua have car bottom  natural gas annealing furnace, the furnace chamber inside size (length*width*heigh) is 10000mmx4000mmx4000mm, this annealing furnace can satisfy the Stress-Relieving annealing treatment after welding for the trolley frame, drum, bogie frame, balance beam, spreader and all kinds of welding structure on the crane, Only Weihua has this ability in China Crane Hometown.  

8.Weihua has top advanced processing and manufacturing equipment and processing technology in the crane industry all over China, at the same time, Weihua take the head in achieve the best and better management, best and better manufacturing, Try the best to ensure the Weihua product quality and satisfy the demand of customer.

Quality promise:

1. All products have production permit or recognition permit; no fake or renovated products;

2. Quality of all products reach class A or distinguished class;

3. Main data of the products satisfy related codes;

4. Strictly follow technological requirements in manufacturing;

5. Strictly test products with standard testing devices to prevent unqualified products from leaving the plant;

6. Set up complete files to keep order contract, manufacturing record, test record, material receiving certificate and factory-leaving record;

7. All products to be delivered are no-damage in appearance and painting and are supplied with mating parts to satisfy clients.

After-sales service promise:

1. Quality problems of products sold by our company will be solved as per the " three guarantees" system of our company by the " three guarantees" service team;

2. Related personnel will be sent to the site immediately after receiving quality complaints (by call, letter or oral notice) from clients;

3. Personnel involved in after-sales service shall be serious and considerate in handling the problem to make clients care-free;

4. In addition to solve quality problems, personnel involved in after-sales service shall train clients, answer their technical inquiries and related questions free of charge;

5. Related cost for products with quality problem will be shouldered by our company. Our company charges for quality problems caused by clients (or problems after the warranty term), but the charge will not be higher than the expense (or cost);

Processing technology of major parts of cranes:

1. Main beam will have sandblast derusting and painted with zinc rich epoxy primer;

2. Main beam is cut by plasma numerical control cutting machine;

3. The butt weld of tension flange shall undergo ultrasonic or x-ray flaw detection as specified.