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Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Zhengzhou Yu-Long Machinery Equipment Co., Ltd. Quality Control

My dear friend, the goods received are good and hope we can work together for more items.

—— Angelo

Yu-Long company is indeed professional in casting field, and help to improve the design and save the cost for us. Thanks very much.

—— John

The delivery is on time, and cooperation is happy.

—— Christopher

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QC Profile

Our Capability & Service & Quality Control


Abundant resources: we have worked closely together with tens of factories located in different provinces in China for many years. They are individually specialized in casting, forging, stamping, welding, machining, and other manufacturing processes. These suppliers are all certified with ISO9001:2001 Quality Control System, and have professional engineers and production equipments. We can meet the customer’s demands for different materials and structural shapes of the products.


Excellent ability for resource consolidating and organizing: the operation team with rich experiences and extensive social relationships can source and locate appropriate factories to proceed with and optimize the production according to the production and machining requirements of the products, to ensure the quality and minimize the costs and prices.


Strict supplier evaluation procedure: Our internal Suppliers Evaluation Procedure has been approved by our customers and the facts prove that it is a scientific and state-of-art procedure. We will choose the most appropriate factory to develop a certain project. Also we can evaluate the supplier with the customer’s evaluation procedure and issue an objective evaluation report.


Scientific QC system: we have an independent QC department and each step of a project is conducted by technical personnel with standard job procedure to follow up, supervise, and inspect, to avoid any possible quality negligence. Drawing dimensions are strictly measured, technical standards reviewed, production and machining processes optimized, and sample and the parts are inspected in detail before shipping. We strictly control product quality at each step to ensure the quality stability.


We implement PPAP procedure during the sample development stage, implement the Production Control Plan during the production course, and sample and evaluate the parts before shipment and issue reports to our customers. The suppliers will provide the qualified certification for all the goods we supplied, and each part will be traceable during the production.


After-sales service system: the after-sales service team is specially in charge of answering the questions raised by the customers and meeting the different customers’ demands. “Satisfy the customer” is our service tenet.


The manufacturers have large production capacity, perfect and mature production process and advanced management method:

The steel casting foundry have sand casting production line, sodium silicate and silicon gel precision casting production line, bimetal compound casting production line and V-method casting production line. All the casting processes will be simulated with software on the computer.

The iron casting foundries have FBO-III automatic molding production line, phenolic sand molding production line, lost foam molding production line,146 pneumatic microseism squeeze machines,145 microseism squeeze machines, 124 shaking squeeze machines, 954 shell core machines, Z9407EK core shooter.

The aluminum casting foundry have sand casting production line and die casting aluminum production line.

We have advanced production equipments, such as intermediate frequency induction furnaces with 250kg--3000kg capacity, electric arc furnaces with 3000kg capacity and fining furnaces with 10,000kg capacity.

The unit part weight we can make can be as small as 0.1kg, and as large as 5 tons.


Advanced machining equipments: We have different types of machining centers, CNC lathes, drill presses, milling machines, saw machines and so on. We have many machining methods showing superior functions.


Professional inspection equipments and measure tools: We have CMM, digital display tool microscope, magnetic powder tester, direct-reading spectrometer, chromometer, large size metalloscope, aluminum alloy pinhole detecting instrument, x ray flaw detector, γ radial flaw detector and advanced tensile strength tester etc., and are equipped with chemical lab and mechanical lab analyzing chemical compositions, testing the mechanism properties, and analyzing the metallogenetic examination, to ensure the quality meets the customers’ requirements.


Zhengzhou Yu-Long Machinery Equipment Co., Ltd. quality control 0


Zhengzhou Yu-Long Machinery Equipment Co., Ltd. quality control 1


Zhengzhou Yu-Long Machinery Equipment Co., Ltd. quality control 2


Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Email: yuloncasting@163.com

Sales Manager: James Wang

Contact Details
Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

Contact Person: Mr. James Wang

Tel: +86 13213152686

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