Astm A103 Gr B Seamless Steel Pipe Round square Hollow bar Big Diameter 250mm Diameter

Seamless Steel Pipe

We have stock seamless steel pipe.

Can also do steel pipe fabrication according to drawings, super fast delivery time. Accept inspect the products before shipping.

Carbon steel pipe, alloy steel pipe, boiler steel pipe, thin wall steel pipe and thick steel pipe.

Steel Pipe Bending

can bend the steel pipe into special section, and do welding.

Steel Pipe Cutting

can cut steel pipe into demand length.

Steel Pipe Painting

painting steel pipe depend on demands.

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 pipe 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.

astm a103 gr b seamless steel pipe round square hollow bar big diameter 250mm diameter