< >

Carbon Hot Rolled Steel Pipe

Hot rolled seamless steel tubes are generally produced on automatic tube rolling units. The solid billet is inspected and cleared of surface defects, cut to the required length, centered on the pierced end face of the billet, and then sent to a heating furnace for heating and piercing on a piercing machine. In the piercing at the same time constantly rotating and forward, under the action of the roll and the top head, the internal cavity of the billet is gradually formed, known as the rough pipe. Then sent to the automatic rolling machine to continue rolling. Finally, the wall thickness is evened out by the equalizing machine, and the diameter is set by the sizing machine to meet the specifications. Utilizing continuous tube rolling unit to produce hot rolled seamless steel pipe is a more advanced method.

Hot rolled seamless steel pipe process mainly includes the following steps:

Heating: The billet is heated to a high temperature (usually 1100°C-1250°C) to make it soft for subsequent processing.

Piercing: A piercing machine is used to punch a hole in the center of the heated billet to form a tubular hollow billet.

Expansion: Further deformation of the perforated billet by extrusion or rolling to enlarge the inner and outer diameters.

Finishing: Straightening of tubes after cooling to ensure uniformity in outside diameter and wall thickness and to remove surface defects.

Heat treatment: Heat treatment is carried out as required to improve the mechanical properties of the pipe.

Inspection: Ensure the quality of the pipe meets the standard through various inspection methods, such as ultrasonic inspection and pressure test.

Surface treatment: Anti-corrosion treatment on the surface of steel pipe, such as painting or galvanizing.

Contact Now E-Mail Telephone WhatsApp

Product Details

Carbon Hot Rolled Steel Pipe is a type of steel pipe classified according to production methods, as opposed to cold-rolled seamless steel pipes. Cold rolling is carried out at room temperature, while hot rolling is carried out above the recrystallization temperature. Seamless steel pipes are made by piercing round steel and then processing them, while welded steel pipes are made by welding steel plates together
The production process of Carbon Hot Rolled Steel Pipe involves heating the steel billet to an appropriate temperature and then rolling it into shape through rollers. This high-temperature rolling method can better improve the internal structure of steel pipes, enhance their mechanical properties and corrosion resistance. Seamless steel pipe is formed by drawing and threading hot-rolled steel billets, and it has a seamless, uniform cross-section and thickness, suitable for use under high pressure, high temperature, and freezing conditions. Welded steel pipes are formed by welding and processing hot-rolled steel plates, and are suitable for use under general pressure and temperature conditions

Carbon Hot Rolled Steel Pipe

Excellent Mechanical Properties: As there is no weld seam, hot rolled seamless steel pipe has uniform mechanical properties and high tensile strength, which can withstand large internal and external pressure.

Good corrosion resistance: The surface treatment of the steel pipe can be selected according to demand, such as hot-dip galvanizing or painting, which enhances its corrosion resistance and prolongs its service life.

High reliability: Seamless design reduces the defects that may occur due to welding, making its performance more stable under high pressure and high temperature environments.

Mechanical engineering: for the manufacture of mechanical components, structural parts and heavy equipment.

Technical parameters:

Material: Q345B, 20#, 45# and other steel grades.

Outer diameter range: 21.3mm - 630mm

Wall thickness range: 2mm - 40mm

Length: conventional 6m - 12m, can be customized according to demand

Standard: GB/T 8162-2008, GB/T 8163-2018, etc.

Packaging and Delivery:

Hot rolled seamless steel pipe is usually transported in bundles or bulk, the specific packaging can be adjusted according to customer requirements. The delivery period depends on the order quantity and production plan, usually within the specified time after the contract is signed.

For detailed inquiry or order, please contact our sales team, we will be happy to provide you with professional service and support.

Leave your messages