1. Stainless seamless tube
2.Stainless welded tube
Specifications of Stainless Steel Tubes:
1. Standard: GB, ASTM, JIS, DIN
2. Grade: 201,202,301, 321, 304, 304L, 316, 316L, 409, etc
3. OD range: 8mm-279.4mm
4. Wall thickness range: 0.3mm-30mm
5. Length: max.18000mm or as demand
6. Surface finish: Polishing (180#,220#,240#,320#400#,600#), Hairline, aid pickling No.1 and so on
7. Manufacture technology: cold drawn/cold rolled
8. Type: Seamless & Welded
400 series stainless steel is a Carbon-Chromium ally, which has martensitic structure and iron, therefore, they have magnetic properties. Meanwhile, they have a good heat processing and anti-oxidization performance. Compared to carbon steel, 400 series stainless steel have a a further improvement on its physical and mechanical properties. Most 400 series can be heat treated.
Most 400 series stainless steel has 18% Chromium, 410 and 420 stainless steel has 13% Chromium.
1. Cheaper than 300 series, and higher corrosive resistance than 200 series.
2. Higher corrosive resistance than 300 series under Chloride environment.
3. With Niobium, Titanium, copper, and aluminum elements added, the drawability, weldability, corrosion resistance
1. Raw material choices.
All of raw stainless steel coils are from YUSCO, Baosteel, TISCO.
From slitting to production, we care more about the tolerance and raw material mechanical parameters to guarantee the tube quality control.
2. Various mold choices
With years of development, shanghai Yieh United Corporation is able to produce various OD tubes with different thickness.
For OD<50mm, Shanghai Yieh United Corporation has induced automatic welding machine. The daily production is 150 tons.
For OD>50mm，Shanghai Yieh United Corporation apply advantageous manual welding process.
3. Surface Polishing.
Shanghai Yieh United Corporation can offer different tube and pipe surface from No.1 to #400 surface based on customers' requirement.
4. Pipe Surface Pickling.
5. Quality Control(Water pressure check)
For every welded tube diameter <50mm, Shanghai Yieh United Corporation strictly test every welded tube in order to guarantee the quality for our customers.
Applications of Stainless Steel Pipes/Tubes:
1).Petroleum, Chemical enterprise, super heater of boiler, heat exchanger
- For tubes, Shanghai Yieh United Corporation offer polishing and bending service.
1. polishing surface(No.4, 8K)
2. Bending(based on customers' requirement)
This is Shanghai Yieh United Corporation standarded package.
Curently, Shanghai Yieh United Corporation has three different production lines including welding, cold drawing, and cold rolling.
2. Cold drawin and Cold rolling for seamless stainless steel tube and pipe.
Based on customers requirement, Shanghai Yieh United Corporation has two production lines.
For OD<100 mm, cold rolling is applied to guarantee the surface and tolerance requirement.
For OD> 100mm, cold rolling is applied to reach the tube diameter.
The overall production Process:
Every batch from Shanghai Yieh United Corporation has been tested with meticulous experiment.