Quality Assurance


DONGSHANG Stainless holds advanced producing facilities, like auto welding machines, cold drawing machines, cold rolling machines, heat treatment furnace, straightening machines, polishing machines, and other machines.

The Machines have hard strength and accuracy to produce in various types, and special products, like super duplex steel tubes and pipes.

Testing and Inspection

We have full sets of test equipment to inspect our products, the main tests are custom testing and optional testing to ensure our products 100% quality, mill test report shoud be issued after testing, usually EN10204/3.1 certificate.

The tests contain Chemical composition analysis via MPI tester, Tension Test, Flattening Test, Flaring Test, Hardness Test, Visual inspection, Dimensional inspection, Eddy current test, Hydrostatic test, Ultrasonic test, Intergranular corrosion test, Grain size test.

ISO quality management system

From raw material to final product, we completely comply to ISO 9001 quality management system, each operator in the process of manufacturing and testing should be instructed as standard or relative documents, each inspection should be recorded, and offer relative files for customers.