DHDZ is the national standard with neck flange manufacturers. The company has strong technical force, can design and manufacture various special specifications of pipe fitting products according to user requirements. With metallographic inspection, physical experiment, chemical analysis, non-destructive testing and other advanced testing equipment and means.
Flange manufacturers are mainly engaged in: gb neck flange, neck flat welding flange, neck butt welding flange, neck non-standard flange and other types of neck flanges. I plant has a large number of pipeline machinery professional backbone personnel, advanced forging equipment and spectral metallography, flaw detection, physical and chemical testing and other complete set of testing equipment, the company strictly implement the quality standard management system. Established a scientific quality assurance system, perfect quality assurance system and scientific manufacturing technology effectively ensure product quality.

DHDZ Flange manufacturers set up quality control department and testing center, with high-pressure pipe fittings and middle and low pressure pipe fittings two testing systems, testing functions complete, testing equipment and instruments are in the international and domestic advanced level, There are X-ray flaw detection, magnetic particle flaw detection, ultrasonic flaw detection, metallographic analysis, chemical test, mechanical property test, impact test, water pressure test, spectral test, infrared monitoring and other testing items.
China gb neck flange manufacturers - win by quality, small profits but quick turnover principle, constantly forge ahead, in the fierce market competition, with good cooperation and sincere service spirit to win the majority of customers trust and rapid development. To forge ahead, the pursuit of excellence, continuous learning, never satisfied with the belief of our customers to create a double win situation, create a better future.