Pipe expansion process

Hot expansion steel pipe mandrel surface pulsating spray device is a device to a thermal expansion pipe mandrel surface spray lubricant, which is characterized by injection device body ring parts with lubricant reservoir burglary, in Chu burglary ring wall open lubricationagents enter the hole, motor Chu burglary side installation, its spindle by driving wheel and the middle with a lubricant output hole pulsating ring phase, the lower part of the output hole placement beam radio regulatory group equipped with a beam of radio regulation.

Pipe expansion process

What is seamless steel pipe and thermal expansion pipe?

Technically speaking, any seamless steel pipe can be called thermal expansion pipe, thermal expansion process is major production process of seamless steel pipe; while there is another type of thermal expansion pipe-large diameter seamless steel pipe, as it is not possible to reach desired diameter in one pipe thermal expansion process, this process have to be taken 2 times.

The main steel grades of the production pipes are: carbon (B/C/6), alloy (P11/P12/P22), high alloy (P5/P9/P91), and EN material (P235GH/P265GH). We also provide line pipes grades such as API 5L B / X42 in PSL 1 and 2.

As of today, the applications of these products are in petrochemistry, refineries and power generation projects. Our products are responding to the needs of our customers to reduce the global weight of their structures, in order to save time on construction.
The expander has the advantage of completing the range of products of both companies and allows us to offer packages.

Advantages are:

using spray lubricant to the mandrel surface, can reduce the frictional resistance between the tube rolling mandrel and steel pipe to reduce the pressure load of the mill and the mill's power consumption to extend the life of the mandrel, to improve the quality of the steel pipe rolling.

Hot expansion pipe with two-step push tube expanding machine set conical die expanding technology, digital intermediate frequency induction heating technology, hydraulic technology in a machine with a reasonable process, low energy consumption, lower capital investment, good product quality, a wide range of applicability of the raw material and product specifications, flexible variable cost of production volume, adaptability, replace the traditional steel industry, of Pullout expanding technology. difficult to resolve in the near future, the supply of large diameter steel pipe, thermal expansion pipe to become the source of the shortage of large-diameter steel pipe products. ease the tight supply situation of the large diameter pipe market.

Thermal expansion pipe has low density and high contraction property; It could replace part of the steel profiles; Saves about 1/3 of steel material, reduces protection layer area, lower the investment and maintenance cost.

Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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

Copyright © 2011 Sunny Steel Enterprise Ltd.  All Rights Reserved ICP No.:08010763