This is the description of astm a53 gr a gr b hot gal steel pipe
Standard ASTM A53
Size OD(inch):1/2-10
ZINC COATED (g/m2):210-500
Length 4.0M,5.8M, 6M, 11.8M, 12M or customized length
End plain end or threaded and one end plastic cap,one end coupling
Application Structural purpose, construction industries,ect
Packing In bundle according to therequirements of the customers
Company Information Name:DongPengBoDa Steel Pipe Group
Type:Manufacturer and Trading Company

Chemical properties

  Carbon Manganese Phosphorus Sulfur Copper Nickel Chromium Molybdenum Vanadium
Grade A 0.30  1.20  0.05  0.045 0.40  0.40  0.40  0.15  0.08 
Type E(electric-resistance-welded)
Grade A 0.25  0.95  0.05  0.045 0.04  0.04  0.04  0.15  0.08 
Grade B 0.30  1.20  0.05  0.045 0.04  0.04  0.04  0.15  0.08 
Type F (fumace-welded pipe)

1.As a sophisticated steel pipe producer in China, we often conduct the second testing in advance. Before production, choosing and checking the suitable raw material is fundamental to the overall construction project. In terms of checking, do you know the testing aspects it contained? At first, we may check the surface of our products to avoid obvious scratching or rusting. It is well known to us that steel pipe surfaces should be evenly without grease or oil. Smooth surface is benefit to make a tight-fitting components. Secondly, gauging thickness is also involved in the testing process. Thickness must be precise in order to accord with the requirement of you. Besides, zinc layer is also very important for customers. Last but not the least, we can have third party checked our steel pipes according to the request of customers.

2.Our pipes undergo a Chromic Acid passivation treatment for the surface of galvanized steel pipe. As a rule, hydrogen treatment and passivation treatment are the two major methods for the final effective painting treatment of galvanized pipe, in order to further improve the corrosion resistance of the zinc layer or maintain the original property of the coating. Furthermore, it also helps to prolong the durable years of the pipes. Generally speaking, our pipes can be used for at least 3 ~ 5 years, sometimes even up to 20 years. In that regard, there alsohas much to do with the specific environment in the actual applications.

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