Product Specification

Product Description

Seamless pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow pipe.The billet has to be heated first, then stretched and finally pushed or rolled over a frame or form until the pipe is hollow. A seamless steel pipe is a circular pipe having a hollow section and no seams around it. The seamless steel pipe is made of carbon steel, alloy steel, stainless steel ingot or solid tube blank, and then is made by hot rolling, cold rolling or cold drawing. Seamless pipes are considered superior to welded pipes as they are built using monolithic steel billets, with intrinsic mechanical strength, without seam welds.Seamless steel pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, used mainly to convey substances which can flow — liquids and gases (fluids), slurries, powders and masses of small solids.
Seamless steel pipes are characterized by a perfect finishing that is flawless and desirable, resulting in higher demand. They are manufactured in circular, rectangular, or square shapes, and the pipes are tubular (hollow) since most of them carry flowing substances such as gases, liquid, slurries, and powders.Seamless steel is strong and durable because it does not weld, neither does it have joints; this implies that the pipe has a uniform structure that ensures even distribution of strength.Seamless steel pipes (ASTM and API 5L) adopt their shape by passing through a perforated tube.A hot rolled seamless steel pipe manufacture is from forging billet, perforating, rolling, and shaping. The tubing is manufactured through an industrial extrusion process and is used to manufacture thick-walled seamless steel pipes and large diameter pipes.
On the other hand, cold drawn seamless steel pipes use the cold-drawn technology, which is suitable for pipes that are of small diameter and thin-walled since they have a lower material strength. It is also useful when the goal is to manufacture a stunning pipe with a smooth internal surface. During the extrusion process, the seamless steel pipes can only roll using a low alloy structure, carbon structural steel, or an alloy structure.
The international standards for seamless steel pipes include API 5L, API 5CT, ASTM A106, ASTM A179, ASTM A789, DN17175, EN10216, etc.If you have detailed standards or tech requirements, please contact us. We will discuss them in depth.

Advantages
1.No welds: Seamless steel pipes are made from one piece of steel billet, without any welds. This avoids welds that might happen during welding. By eliminating potential weaknesses from welding, the pipe becomes stronger overall.
2.Higher compressive strength: Seamless steel pipes have higher strength. They lack welds, so their structure is more even. This gives them higher compressive strength. This makes seamless steel pipes more suitable in high-pressure and high-temperature environments.
3.Better corrosion resistance: Seamless steel pipes have a smooth surface, reducing the chance of corrosion. The welds are even. Seamless steel pipes are more reliable in applications that need corrosion resistance.
4.Suitable for high and low-temperature environments: Seamless steel pipes are good for high and low-temperature environments. They don’t crack easily.
5.Precise dimensions and stable shape: Seamless steel pipes are usually more precise in size and more stable in shape than welded ones. This is better for bigger applications, like making precision machinery and equipment.

Process of SS316 304 Seamless well casing satinless steel pipes line:

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