Professional Manufacturing

DONGSHANG Stainless holds advanced producing facilities, including auto welding machines, cold drawing machines, cold rolling machines, heat treatment furnace, straightening machines, polishing machines, auto welding machines and bright annealing device, these machines have hard strength and accuracy to produce wide range size and material products.

Welded Tube & Pipe


Seamless Tube & Pipe


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, 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.

Visual inspectionNDTStandard
Material identificationNDTE1476Standard
Tensile StrengthDestructiveA370Standard
Flattening testDestructiveA370Standard
Flare testDestructiveA370Standard
Flange testDestructiveA370Standard
Reverse BendDestructiveA370Standard
Eddy Current testNDTE309Standard
Ultrasonic testNDTE213Option
Hydrostatic testNDTA1016Option
Corrosion testDestructiveA262-EOption


A213 TP316L Seamless Stainless Steel Tube
  • Bundles, outside with plastic bag
  • Small bundles in plywood case
  • Steel frame case
  • Plywood case
  • Plastic bag for single large diameter pipes
  • U bending tubes package
  • Tube ends with caps, each tube with plastic bag