Tianjin Kaida Import&Export Co.,Ltd is one of the leading manufacturers and suppliers of erw round tube in China, featured by quality products and low price. Please rest assured to buy cheap erw round tube from our factory. Contact us for discount information.
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Product Name: |
erw round tube |
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Out Diameter: |
Round 0.3mm~650mm |
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Thickness: |
0.4mm~30mm |
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Length: |
5.8m, 6m, 12m or as per customer's requirement |
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Pipe Ends: |
Plain, threaded, beveled. |
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Surface: |
Bare, oil, painting etc. |
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Packing: |
Bundle, or with all kinds of colors PVC or as your requirements |
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Standard: |
ASTM A53, API 5L, BS1387, EN10210, GB/T9711, GB/T3091, DIN 2458 |
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Grade: |
Grade A, B, X42-X70, S235JR, S355JR, ST37, ST52 |
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Application: |
Water, Gas, Stream or other liquid delivery, Construction, Warm house, Mechanical tubing. |
The difference between erw round tube and seamless black steel pipe
Comparing erw round tube and Seamless Black Steel Pipe
The biggest difference between erw round tube and seamless steel pipe is that erw round tube has weld seam, which is the same as welded steel pipe, but seamless black steel pipe does not, nor does welded steel pipe. In addition, the welding line of ERW pipe is the key to the quality of erw round tube. The harder the weld line of the ERW pipe is to identify, the higher the quality of the erw round tube .
There are two methods of eliminating welds: geometrically seamless and physically seamless. Geometric seamless is to eliminate internal and external burrs, and physical seamless is to take measures to make the base metal and metallographic structure uniform. It seems to be more complicated to achieve, but which can be achieved.
Quality Inspection
Packaging & Container Loading
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