Cold-rolled seamless steel pipe is a kind of steel pipe with high precision and excellent performance, which is widely used in various industries.
Cold-rolled seamless steel pipes have high dimensional accuracy, with small tolerances in outer diameter and wall thickness, which can meet the strict requirements of different engineering applications,automobile Industry
REHOND is a seamless steel pipe manufacturer and supplier.We focus on providing wholesale carbon steel pipe services to customers in over 20 countries worldwide.
When considering manufacturer seamless steel pipes,contact our experts directly. We can advise you on dimensions, tolerances, specifications, quantities, etc.
| Product Name | Seamless Steel Pipe/Tube |
|---|---|
| Manufacturing Standard | ASTM A106, ASTM A53, ASTM A179, DIN2391, EN10216, JISG3454, JISG3441 etc. |
| Steel Grade | GR.A, GR.B, GR. C, 10#, 20#, 35#, 45#, STK 500/540, STK 500, SPTG370, STPG410, STS370/410/480, 1008, 1020, 1013, 4140, 5130 etc. |
| Product Types | Engineering Pipe, Tubing and Casing, Roller Pipe, Drilling Pipe, Automobile pipe, etc. |
| Outer Diameter | 10 - 120mm |
| Wall Thickness | 0.5mm ~ 20mm |
| Length Range | 0.5 - 12M |
| Surface Coating | Oiling, Lacquering, Hot-Dip Galvanizing, Powder Painted, Electro-Galvanized |
| Pipe End Type | Square End, Bevelled End, Threaded End, Grooved End, Shouldered End |
| Cold drawn / hard (+C) | No heat treatment after last cold forming process. |
|---|---|
| Cold drawn / soft | After last heat treatment there is a light finishing pass (cold drawing). |
| Cold drawn (+SR) | After the final cold forming process the tubes are stress relieve annealed. |
| GBK (+A) | After the final cold forming process the tubes are annealed in a controlled atmosphere. |
| NBK (+N) | After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere. |
The round steel bar is used to produce seamless pipe. After heating the bar to a high temperature, a probe is put into the bar to produce a hole. The cylinder is then moved to rollers that shape it to the required diameter and wall thickness.

Seamless pipes are made from high-quality steel. It is cast into a round shape and then pierced at the center. Then, it goes through rolling and heat treatment. After that, it is cut into different sizes based on the need. These pipes are devoid of any welding joint, which enhances their structural integrity. Seamless pipes are durable. They can handle high heat and pressure. They also resist corrosion. They have uniform properties throughout their length, making them better than welded pipes.
• Higher investment cost compared to welded options
• No welding seam on the entire tube body
• Manufactured from solid round steel bars
• Extremely high OD and ID dimensional tolerances
• Engineered to withstand high-pressure environments
• Stable and highly accurate wall thickness tolerance
• More economical option compared to seamless pipes
• Features a visible welding seam along the tube
• Raw materials are primarily steel coils and strips
• High production efficiency for rapid delivery
• Thickness tolerance is moderately precise
• Primarily used for low to medium pressure applications
