Product Name: China market astm a53 gr a gr b hot galvanized steel pipe Size:OD (mm):16mm-273mm Wall Thickness (mm):1.0mm-16.0mm ZINC COATED (g/m2):200-500 Standard:ASTM A53 Material:Gr a.Gr b Section shape:Round Type:ERW Pipe Length:5.8M, 6M, 11.8M, 12M or customized length
Seamless pipe production procedure and methods:
1. Hot rolled seamless steel pipe
using hot rolled steel pipe billet to make heating and piercing, elongating, sizing and stranghtening, cooling, finally hollow bars finished, this is the type most commonly used. Because it is hot rolled, so cost is lowest, but it is suit for large quantity, for small quantity, have to make cold drawn or round bar piercing. size: outer diameter 32mm- 499mm, wall thickness 4mm- 80mm
2. Cold drawn seamless steel pipe
for outer diameter not over than 63.5mm, small size hollow bar, when demanded quantity is under 5 tons, usually make cold drawn hollow bar, using larger size hot rolled hollow bar to draw to the size demanded.
some size can be finished only by one time drawing, but some other sizes might need twice or three times to finish drawing, it takes time, so the cost is higher.
cold drawn size outer diameter 16mm- 63.5mm
3. Hot- expanding seamless steel piper
For hollow bar sizes are special, not common sizes, have to use smaller thick wall hollow bar to hot expand to be larger size hollow bar, but the technical property for hot-expanded hollow bar will be lower than the original hollow bar. Size: outer diameter over 356mm.
Liaocheng Bangrun Metal Material CO.,LTD is located in water city.Liaocheng.in shandong province. The city near Beijing to Guangzhou railway and Jinan to Liaocheng high way. You can go to Beijing or Shanghai and come back within in one day. bangrun is committed to service in good customers at home and abroad. The main business is kinds of steel pipes , steel sheet pilings , steel profiles , pipe fittings and steel related products.
We have very rich experience supply Product about Oil refining project. Power plant project and Chemical plant.etc We can easily make the factory production products according to customer's requirements, because we know the international standard very well. Choose us.We will give you professional, efficient, convenient, win-win services!