MS Seamless Pipe, Mild Steel Seamless Pipe Manufacturer & Exporter

Mild Steel (MS) pipes are manufactured using low carbon (less than 0.25%) steel. As MS Pipes are made from mild steel they can easily be welded and formed in various shapes and sizes for pipelining and tubing purposes.

Permanent Steel Manufacturing Co., Ltd is a well-known MS Seamless Pipe Manufacturer, known for its precision engineering, light weight, corrosion resistance, reasonable structure, complex details, and economy. We have set an example in terms of quality and performance by manufacturing and supplying MS seamless pipes. MS seamless pipes are due to their high strength and pressure-bearing capacity. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction.

Features of MS Seamless Pipe 

1. MS seamless pipe is a type of carbon steel with carbon content below 0.25%. It is named mild steel for its low strength, low hardness and soft texture.

2. After annealing, MS seamless pipe consists of ferrite and a small amount of pearlite, featuring low strength and hardness, as well as excellent plasticity and toughness.

3. MS seamless pipe boasts good cold formability and can be processed by crimping, bending, stamping and other cold forming methods.

4. MS seamless pipe offers superior weldability and is easy to process via forging, welding, cutting and other fabrication operations.

Manufacturing Process of MS Seamless Pipe 

The raw material of the MS seamless pipe is a round tube blank. The round tube blank is cut by a cutting machine into a billet with a length of about 1 meter, and is sent to the furnace for heating via a conveyor belt. The billet is fed into the furnace and heated at a temperature of approximately 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key issue.

After the round tube billet comes out of the furnace, it is pierced by a pressure piercing machine. Generally, the more common piercing machine is the tapered roller piercing machine. This type of piercing machine has high production efficiency, good product quality, large perforation diameter expansion, and can wear a variety of steel types.

After piercing, the round tube billet is successively cross-rolled, continuous rolled or extruded by three rolls. After squeezing, take off the tube and calibrate. The sizing machine uses a tapered drill bit to rotate at a high speed into the steel blank to punch holes to form the mild steel seamless pipe. The inner diameter of the steel pipe is determined by the length of the outer diameter of the drill bit of the sizing machine.

After the mild steel seamless pipe is sized, it enters the cooling tower and is cooled by spraying water. After the mild steel seamless pipe is cooled, it will be straightened. After straightening, the mild steel seamless pipe is sent to the metal flaw detector (or hydraulic test) by the conveyor belt for internal flaw detection. If there are cracks, bubbles, etc. inside the mild steel seamless pipe, it will be detected.

After the quality inspection of mild steel seamless pipe, strict manual selection is required. After the quality inspection of the mild steel seamless pipe, paint the serial number, specification, production batch number, etc. with paint. It is hoisted into the warehouse by a crane.

Application of MS Seamless Pipe

MS seamless pipe / mild steel seamless pipe is widely applied in multiple industrial and construction fields.

Regular grade mild steel seamless pipe is commonly used to manufacture building structural parts, storage containers, tanks, industrial furnaces and agricultural machinery equipment. High-quality MS seamless pipe is suitable for producing automobile cabs, engine hoods and other deep-drawn components. It can also be processed into profile bars for manufacturing mechanical parts with specific strength demands.

Normally, mild steel seamless pipe requires no heat treatment before service. For grades with carbon content over 0.15%, carburizing or cyaniding treatment can be adopted. These treated pipes are ideal for making shafts, bushings, sprockets and other parts that need high surface hardness and excellent wear resistance.

Low-carbon MS seamless pipe has relatively low strength, which limits its application scope. Properly increasing carbon and manganese content, plus adding trace alloy elements such as vanadium, titanium and niobium, can significantly enhance its structural strength. Reducing carbon content while adding a small amount of aluminum and boron carbide forming elements can produce ULCB steel, which achieves high strength while retaining good ductility and toughness.

Heat Treatment of MS Seamless Pipe

Low carbon steel tubing with seamless(ms seamless pipe) has a large tendency to aging, both quenching and aging tendencies, as well as deformation and aging tendencies. When the steel is cooled from high temperature, the carbon and nitrogen in the ferrite are supersaturated, and the carbon and nitrogen in the iron can be slowly formed at normal temperature, so that the strength and hardness of the steel are improved, and the ductility and toughness are lowered. This phenomenon is called quenching aging. Low carbon steel tubing with seamless will have an aging effect even if it is not quenched. 

The deformation of low carbon steel tubing with seamless produces a large number of dislocations. The carbon and nitrogen atoms in the ferrite interact elastically with dislocations, and carbon and nitrogen atoms gather around the dislocation lines. This combination of carbon and nitrogen atoms and dislocation lines is called the Cochrane gas mass (Kelly gas mass). It increases the strength and hardness of steel and reduces the ductility and toughness. This phenomenon is called deformation aging. Deformation aging is more harmful to the ductility and toughness of low carbon steel than quenching aging. 
There are obvious upper and lower yield points on the tensile curve of low carbon steel. From the upper yield point until the end of the yield extension, a surface wrinkle band formed on the surface of the sample due to uneven deformation is called the Rydes belt. Many stamping parts are often scrapped. There are two ways to prevent it. A high pre-deformation method, the pre-deformed steel is placed for a period of time and the Rudes belt is also produced when stamping, so the pre-deformed steel should not be placed too long before stamping. The other is to add aluminum or titanium to the steel to form a stable compound with nitrogen to prevent deformation aging caused by the formation of Kodak air mass.

FAQs

1. What are the key features of MS Seamless Pipe?

It is low-carbon steel (<0.25% carbon) with low strength/hardness, good plasticity, cold formability, weldability and processability.

2. How is MS Seamless Pipe manufactured?

Using round tube blanks: cut into 1m billets → heated to 1200℃ → pierced → rolled/extruded → sized → cooled → straightened → flaw-detected → inspected → marked → warehoused.

3. What are the main applications?

Widely used in industry and construction: building parts, containers, auto components, and mechanical parts.

4. What are its advantages?

Good formability, weldability and cost-effectiveness, suitable for various industrial and construction scenarios.

Article source: https://article-realm.com/article/Business/82859-MS-Seamless-Pipe-Mild-Steel-Seamless-Pipe-Manufacturer-and-Exporter.html