a) C: 3.4 - 3.7%
b) Si: 2.0 - 2.4%
c) P: <0.08%
d) S: <0.015
B.Pull strength: >420MPa
C.Yield: >10%
D.Hardness: <230HB
E.Process and testing:
a) Blast furnace (Analysis of raw materials test )
b) Mg treatment (Micro & chemical composition test)
c) Pipe spinning (Temperature test)
d) Heat treatment (Micro structure; Flattening test)
e) Zinc coating (Thickness testing)
f) Dimensional checks (Thickness & Dia. testing)
g) Hydraulic test (Pressure test)
h) Internal lining (Thickness testing)
i) External coating (Thickness test)
1. Are you manufacturer or trading company?
We are manufacturer. No need worry.
2. Are your price is competitive?
Different quality means different prices. But we are doing our best to control the cost by the purchasing materials, processing, efficiency of processing, land freight, sea freight etc.
3. How is your quality?
Our technician will make a best draft according to your project. You can finish your project at lowest cost.
4. What is your warranty?
Warranty period is one year. For any problem, you can contact our sales people. They will help you to solve the problem.
5. Can I get free sample?
Yes, we would like to supply free sample. If you are sincere customers, we will try to pay the post charge.
6. How is the shipment time?
We have stock for regular size for prompt shipment. If the size you demand is special, usually we can arrange shipment in 20 days.
7. Our money is safe or not?
We have factory. And our factory won’t close just for your some money, right?
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