Our in-house testing center has been formally recognized by CNAS (Registration No. CNAS L21287), with test results supported under the ILAC MRA and APAC MRA mutual recognition framework.

Overview

Qingyuan, Guangdong, China — The Testing Center of Guangdong Xin Tongshi Group Co., Ltd. (TONGSHI) has been granted Laboratory Accreditation by the China National Accreditation Service for Conformity Assessment (CNAS), under Registration No. CNAS L21287. The accreditation recognizes the center's competence to undertake the testing services described in the official schedule attached to the certificate, in accordance with ISO/IEC 17025:2017, the international standard for the competence of testing and calibration laboratories.

What the Accreditation Means

CNAS is authorized by the Certification and Accreditation Administration of the People's Republic of China (CNCA) to operate the national accreditation scheme for conformity assessment. Accreditation to ISO/IEC 17025:2017 means the testing center has been assessed against internationally recognized requirements covering laboratory management, technical competence, personnel qualification, equipment traceability, test methods, record keeping and reporting impartiality. It is a formal, third-party-validated statement that the center operates competently and can produce reliable, traceable test results within its accredited scope.

What This Means for Our Customers

• Documented competence: testing procedures, equipment and personnel are maintained under a management system aligned with ISO/IEC 17025:2017.

• Reliable validation: products are verified against defined methods before delivery, supporting consistency in quality.

• Export confidence: accreditation under the ILAC/APAC mutual recognition framework strengthens credibility for OEM and aftermarket buyers serving overseas markets.

• Transparency: the accredited scope and certificate validity can be verified directly through the CNAS public directory.

Supporting Our Thermal Management Product Range

The testing center supports the company's thermal management and heat-exchange product portfolio, which includes radiators, AC condensers, intercoolers, oil coolers, heaters and evaporators. The specific tests, parameters and product categories covered by this accreditation are listed in the official schedule attached to Certificate No. CNAS L21287, which forms an integral part of the certificate.

About Guangdong Xin Tongshi Group Co., Ltd.

Guangdong Xin Tongshi Group Co., Ltd. (TONGSHI), based in Fogang, Qingyuan, Guangdong, is engaged in the development, manufacturing and quality control of automotive and industrial heat-exchange products. The CNAS accreditation reflects the group's ongoing investment in in-house testing capability and its commitment to supplying products with verifiable, standards-based quality assurance.

Work With Us

Looking for a heat-exchange supplier with an accredited testing foundation? Contact the TONGSHI team to discuss your radiator, condenser, intercooler or oil cooler requirements.