Jiangxi HRM International Trade Co., Ltd
+86-0793-2365328
Jiangxi HRM steel tube Co., LTD. was established in November 2006, located in the economic development zone of Yushan County, Shangrao City, Jiangxi Province at the foot of the beautiful "World Natural Heritage" Sanqing Mountain. There are 2 production plants, covering an area of 130,000 square meters, with an annual output of 100,000 tons of steel tubes and 300 employees. It is the only large-scale enterprise specializing in manufacturing precision seamless bearing steel tubes in Jiangxi Province integrating production, learning and research.
Advanced equipment
The company operates 2 automatic bearing forging production lines, 1 automatic spheroidizing annealing furnace line, 8 sets of automatic machining lines, and other supporting facilities such as a mold processing center.
Our certificates
It has obtained 7 invention patents for precision bearing steel seamless steel tubes and 31 practical patents.
Quality control
It has fully passed IATF16949 "Automotive Industry Quality Management System" certification, ISO9001 quality management system, ISO14001 environmental management system certification, ISO45001 occupational health and safety management system, and integration of industrialization and industrialization management system.
Craftsmanship of Seamless Tube：
Hot finished:
In this process, the seamless pipe is formed by piercing a solid billet of the chosen material and then elongating it through a series of rolling mills. This method produces pipes with a smooth surface finish and dimensional accuracy.
Cold finished:
Cold finished seamless pipes are manufactured by drawing the material through a die to reduce its diameter and wall thickness. This process enhances the pipe's mechanical properties and surface finish.
Benefits of Seamless Tube：
Higher strength
Welding involves a heat-affected zone and potential inclusions and impurities, this means the process of creating a welded tube is not as easy to control, and therefore seamless tube is generally of better quality and has better mechanical properties.
Surface finish
The cold drawing process in particular results in a much cleaner finish when compared to the hot processing of some welded tubes, requiring less processing to use in aesthetic or hygienic applications.
Better pressure rating
Because of its superior mechanical strength and homogenous structure, seamless tubes can be used for pressurized systems more readily.
Application Scenarios：
Oil and gas transportation field: Used for high-pressure oil and gas well casings, oil and gas pipelines, suitable for high-pressure and complex environments such as underground or submarine.
Power industry: Used in power station boilers, supermarket tubs, and header tubes, they withstand the long-term effects of high-temperature, high-pressure steam.
Machinery manufacturing: Used for precision components such as machine tool spindles and hydraulic cylinders, relying on high strength and dimensional accuracy to ensure equipment operation.
Chemical industry:
Transporting corrosive media such as acids and alkalis or high-temperature reaction materials, reducing leakage risks with corrosion resistance and sealing properties.
Automobile industry:
Used in automobile drive shafts, shock absorbers, and other components to adapt to vehicle operation requirements with its impact resistance and lightweight properties.
Construction engineering:
Used in high-pressure water pipeline networks, steel structure supports, and other scenarios to meet the dual needs of structural strength and fluid transportation.
Aerospace:
Used as aircraft hydraulic system pipelines, rocket propellant delivery pipes, etc., they are adapted to high precision and reliability requirements under extreme working conditions.
The ends of the pipe can be finished in several ways depending on how it will be joined:
Plain end (PE): The ends are cut square and left unfinished. This is the most basic option suitable for welding or mechanical couplings.
Bevelled end (BE): The ends are cut at an angle, typically 30° or 37.5°, to create a V-groove for welding. The bevel allows for complete penetration of the weld metal into the joint. Bevelled ends are the most common choice for welded construction.
Threaded end (TE): The ends are threaded either externally (male) or internally (female) to allow the pipes to be screwed together. Threaded connections are commonly used for low-pressure applications like water or air lines and temporary or portable installations. The threads can be tapered (NPT) or straight (BSPP or BSPT).
Threaded and coupled (T&C): One end is externally threaded, and a coupling (sleeve) is screwed onto it. The other end of the coupling is internally threaded to accept the next pipe. This allows for quick assembly and disassembly in the field.
Grooved end: A groove is cut around the circumference of the pipe near the end to accept a mechanical coupling. Grooved couplings allow for fast installation and some flexibility in the joint to accommodate thermal expansion or contraction.
We're well-known as one of the leading seamless tube suppliers in China. If you're going to wholesale bulk seamless tube made in China, welcome to get free sample from our factory. Also, customized service is available.
Bearing Steel Tube, Bearing Tubes and Pipes, seamless tube(0/10)
