1. Stainless seamless tube
2.Stainless welded tube
Specifications of Stainless Steel Tubes:
316L stainless steel is Mo-contained material, the overall mechanical performance is better than 301 and 304. In the high temperature environment with sulfuric acid(C%<15% or C%>85%), 316L stainless steel sheet has a good performance. Meanwhile, 316L stainless steel also has good resistance to chloride corrosion performance, it is usually used in the marine environment.
the low carbon version of 316 and is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.
Chemical Parameter of 316L Stainless Steel Tube
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 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.
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Applications of Stainless Steel Pipes/Tubes:
Conditions for nuclear fuel reactor environment is extremely harsh. The inner tube environment will undertake a high temperature. The liquid sodium reach up to 600 ℃. the internal pressure will reach to 100 times of atmospheres; the whole flux for the tube reach to 10 to (14) neutron irradiation ~ 10 ~ (15) nv . In such harsh conditions, materials should have good corrosion resistance and good durability under thermal stress conditions and thermal shock which result from thermal cycling and temperature difference . Therefore, many countries have been doing many test and research cladding tube. Based on these studies, the current deformation rate of 316L stainless steel tube reach to 15 to 20% in the application of fast fuel reactor. In fact, the actual production and application of 316L stainless steel seamless steel pipe can undertake higher temperature than 304. It also can undertake more corrosion resistant and occupy a certain market share.
1).Petroleum, Chemical enterprise, super heater of boiler, heat exchanger
1. polishing surface(No.4, 8K)
2. Bending(based on customers' requirement)
This is Shanghai Yieh United Corporation standarded package.
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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.