about zhengnai
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Why choose us?

The quality assurance system consists of the following steps.

Inspection and Control of incoming raw materials quality

According to the chemical content,raw materials are classified into different levels to ensure quality of graphite electrode first.


Inspection and control of the process

During the production,graphite electrodes will be tested for physical and chemical properties by advanced test facilities,weighed and measured.


Inspection of product Standardization of quality

Inspection of product Standardization of quality by process control and experimentation.


Quality audit by quality management

Before delivery, the inspectors will inspect appearance of graphite electrode again in factory.


Qualified and experienced engineers

Qualified and experienced engineers are strong back for our quality assurance system.Further, regular quality audit carried out ensures product quality within required norms.


Perfect Service System and Craftsman Spirit

Service aspect: perfect service system, professional scheme provider.
Management: Perfect Management System.
Scientific Research: Serious Professional Spirit.

About ZhengNai

Zhengzhou Zhengnai Industry co., LTD (For short: ZhengNai) was located at litang Town, Xinmi City, Henan Province of People’s Republic of China, one of the key enterprises in refractory industry in China.

About us

ZhengNai is a well-known supplier in Graphite Electrode field in China for its large scale, environmental protection and high level equipment. The main products are Regular Power Graphite Electrode/high power Graphite Electrode/Ultra High Power Graphite Electrode/Super High Power Graphite Electrode/Electric ARC Furnace Graphite Electrode .

About us

The company appointed and employed the well-known expert  as the technical adviser, and established technology R&D center for the production and new products and materials’ research. The main managers in different divisions of the company are all have the corresponding senior or middle professional titles. They have professional ability to communicate with customers timely and can handle with customers’ demands effectively. Also there are specialists who are responsible for the customers’ after-sales work.

Our Services
1.Zhengnai Industrial has established complete quality system and conducted quality control 
2.Our Products with excellent performance, to meet the needs of users, users have produced huge economic and social benefits, by the user's trust and praise, some products won the ministry of excellence, provincial excellence title. 
3.We have our own professional insulation construction team, construction guidance technical personnel, so that users use our products in the process of rest assured, at ease.