Steel pipe fabrication is the process of cutting, bending, and shaping steel alloy to create a product. Steel Supply strives to be a one stop shopping experience for all of your steel needs. In doing so we provide state of the art services such as shearing, sawing and plasma cutting.
Steel pretreatment is to remove rust and add protection layer on the steel pipe surface. This process can enhance mechanical properties and corrosion resistance of the pipes by optimizing the steel surface condition. It includes shot blasting, paint spraying and coating.
Cold and hot simmer bending uses a complete set of dies to bend the pipes, one popular product is steel elbow, which is widely used in transmission of oil, gas or other fluids.
Steel pipe beveling is mainly used to obtain better welding conditions, same as steel plate beveling, it can improve the weld joint quality.
- Types of bevels
- Beveling methods
- Choosing the right method
Threaded pipe has the advantages of easier assemble with no welding treatment, it is one major processing method in pipe production. Threading pipe ends use the corresponding coupling the pipe connected. Threaded connections required to connect high strength, good air tightness to prevent leakage of pipe breakage and transport medium. Steel wire in the car before the end usually after machining include: cutting, car cylindrical, boring, chamfering and face processing. These processes are generally a dedicated threading machines at once, and some can also be done on two machines. In order to ensure compliance with standards thread size, oil drill pipe using pipe threaded ends, factory various instruments required rigorous testing, test items include snails moment, tooth height, tooth, thread length, taper, tight moments and so on.
Pipe end sizing
The purpose of pipe end sizing is to reduce the ellipticity of steel pipe to ensure that the steel pipe after machining the dimensional accuracy, mainly for oil casing. After the end of the diameter of the casing, the end of the car when the black leather buckle (leaving the leakage surface of the thread) a small number, can improve the finished product rate.
Pipe end sizing is a cold deformation process, the commonly used sizing method has a punch diameter and punch diameter + diameter ring compression two. The effect of reducing the ellipticity of the pipe when the punch is enlarged depends to a large extent on the uniformity of the wall thickness of the pipe. On the uneven thickness of the hot rolling pipe, such as the cycle of rolling mill rolling pipe (see the cycle of rolling mill rolling mill), the punch after the expansion of the pipe surface quality deterioration. Therefore, in order to eliminate the influence of uneven wall thickness and reduce the ellipticity of steel pipe, should adopt the punch diameter + sizing ring compression method. As the cold diameter, the tube end not only produce elastic deformation but also a small amount of plastic deformation. After the sizing, there may be different degrees of residual stress in the transition zone with diameter and non-expanding diameter, and the internal and external surface scratches caused by the punch and the sizing ring may occur, resulting in slight stress corrosion. Therefore, try to improve the dimensional accuracy of hot-rolled steel pipe, to avoid the use of pipe diameter method.