Quality Control

– Raw Material Selection (Porcelain insulator)

Contune International has strict policies for product quality control.  With essential background investigation for buer&seller can largely reduce the risk and problems during our cooperation with clients. Instead of pursuing extremely cheap products, we aim at providing cost-efficient products for our clients based on the line that all products are inspected and tested accordingly.

From the very beginning section, raw material selection to producing technics, till items are taken to ex-works tests and packing,contune intl cares about every aspect and details for customers’ concern.

– Standard Applied

The ceramic insulator:  mostly according to ANSI  standard C.29 with all required aspects.

Polymeric insulators: conform with IEC standard 60383 61109.

Metallic Fittings: Mainly follow IEC standard for transmission line and distribution line.

– Tests of insulators

Type Test: Type tests are done by third-party labs which are acknowledged as Chinese national laboratories, mainly from Beijing and Wuhan.

Factory Acceptance Test / Routine Test: All products supplied by Contune International Corp are tested before coming out from the workshop, including visual inspection,electrical-mechanical tests of 50% SML.

Sample Test: Samples are randomly picked out from mass production and sent into a lab for full electrical and mechanical tests on professional devices. Higher voltage and mechanical load are applied to samples until they break to see the limitation of the product and make sure products will not fail under the real circumstances.

>>View testing equipment of insulators


Contune Intl offers more than products. Our service is one of the important aspects that differentiate us from ordinary Chinese companies.

– Design / Research / Development:
Contune International invests a great sum of funds every year on research, design, development to improve our testing machine products to improve user experience.

– Logistic and Insurance Covering
With stable and long term collaboration with insurance company PICC and shipping company, we provide safe and cost-effective solutions to clients on goods transportation. From packing in the workshop,  inland delivery to ocean/air freight, our consideration covers all the way long to ensure products are well received by end-user. The cost is also lower than those solutions from a single delivery business in the buyer’s country.

– Free Online Technical Support

We provide online support of insulator testing equipment and insulator production equipment via chatting tools, telephone and e-mails. Any questions during the usage of our testing facilities are free to inquiry and customers’ requests will be well noted and solved.

– Free Software Update
We have been improving our software of insulator testing machines to achieve even better performance, most easy operation and highest efficiency. Software updates will be duly tested and released to our users for free.