1. Stainless seamless tube
2.Stainless welded tube
304 stainless is the most common stainless steel type. In stainless steel industry, it is called 18/8. Due to its good heat-resisting performance and processing performance. It is widely used in decoration, furniture industry and food industry; for example, luxury stainless steel tableware, bathroom and kitchen appliances. It is a universal stainless steel used for different situations which need high corrosive resistance. It contains at least 16% chromium and 8% nickel. 304 stainless steel is a grade produced in accordance with the ASTM standard stainless steel.
Specifications of 304 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
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 304 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 304 tube diameter <50mm, Shanghai Yieh United Corporation strictly test every welded 304 tube in order to guarantee the quality for our customers.
Applications of 304 Stainless Steel Pipes/Tubes:
1).Petroleum, Chemical enterprise, super heater of boiler, heat exchanger
- For 304 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 304 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.