... door, windows, handrail, ladder, furniture and so on.2. heat-exchanger, condenser, boiler pipeline parts and superheater.3. pressure pipelines, petroleum transmission ... tubes, including 201, 202, 301, 304, 316L, 2205 and so on.As regards to the product standard, we produce the stainless ... pipes/tubes shall be cold worked either in both weld and base metal or in weld metal only. The method of cold ...