Home > About Us> Tech & Service>

Thick wall seamless steel tube production process

Thick-walled steel pipe mainly used in petroleum geology drilling pipe, petrochemical cracking with tubes, boiler tubes, pipes and automotive bearings, tractors, aviation structures with high precision tubes.

Thick-walled seamless steel pipe manufacturing process:

Hot-rolled (extrusion seamless steel pipe) round tube perforation → heating → three-roll rolling, rolling or extrusion → detached → sizing (or reducing) cooling → straightening → hydrostatic test (or testing) sign → storage.

The raw material of rolling seamless tube is round. And by conveyor belt to the furnace heating. The billet is fed into the heating furnace, the temperature is about 1200 ℃. Fuel is hydrogen or acetylene. Furnace temperature control is a critical issue. After the round tube furnace to go through the pressure puncher piercing. Generally more common punch is tapered roller punching machine, punching machine such high production efficiency, product quality, perforated expanding capacity, can be worn a variety of steel. After perforation, round tube has been three-roll rolling, rolling or extrusion. To squeeze off the pipe after sizing. Sizing mill into high-speed rotating cone drill through perforated steel embryo formed steel.

Pipe inside diameter is determined by the outside diameter sizing mill drill length. After sizing the pipe into the cooling tower through spray cooling pipe after cooling, it is necessary to be straightened. After straightening the steel conveyor belt to the metal detection machine (or pressure test) for internal testing. If the internal pipe cracks, bubbles and other issues, will be detected. After the selection of steel but also through strict quality control manual. After the steel quality, spray paint on number, size, batch number and so on. By a crane into the warehouse.

English Inglés SpanishEspañol
Tech & service
Sunny Steel Blog

Recommended products

Pipe fittings
Pipe fittings are used to connect pipes.
Welded steel pipes Weld steel pipes
We produce an extensive selection of weld steel pipe
Welded steel pipes Anti corrosion pipe
Anti-corrosio pipe is processed through the preservation
Ceramic-Lined Pipes
from a single spool piece to complete piping systems.
Pipe flanges
Pipe flange are a method of connecting pipes, valves.
Pipe Fitting Accessories
We are passionate in Stub Ends, Bolt Sets, Fasteners

Contac Us

About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

Link exchange