At Hangda, we focus on product quality. In order to better ensure product quality, we have established a perfect quality assurance system. For instance, we give our products with various perform performance tests, including spectral analysis, penetration testing, tensile testing, impact testing, fire test, low temperature testing, vacuum testing, radiographic inspection, and more. Through our constant efforts, our products have got API 6D, DNV 9001, CE, API 607, and TS certifications, etc.