Flange plays a vital role in pipeline connection, it is an important link connecting valves and pipelines.

Flange is an important part for pipe connection, usually fixed by bolts and sealed with gaskets. It is not only used for the connection of pipelines, but also widely used for the import and export connection of equipment.

Steel pipe in the process of welding, should pay attention to a lot of matters, ignoring any link may lead to product quality problems or safety risks.

ASTM A335 is a standard specification for seamless ferritic alloy steel tubes for high-temperature service. The pipe is suitable for bending, welding, flanging and other forming operations, widely used in electric power, petrochemical, oil refining and other industries, especially suitable for boiler and superheater pipeline and other high temperature and high pressure conditions.

The ASTM A192 specification specifies minimum wall thickness standards for seamless carbon steel tubes for high pressure boilers and superheaters, which are ideal for use in high, medium and low pressure environments.

Pipeline is widely used in petroleum, chemical industry, construction, energy, transportation and other fields, the selection of pipeline materials can directly affect the safety, economy and service life of the pipeline system.

Hot-rolled seamless steel pipe is a kind of non-weld steel pipe made by perforating the whole round steel. According to different production processes, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes and pipe jacking and other types.

API 5CT is a standard technical specification for steel casing and tubing used in oil and gas industry oil Wells, among which API 5CT oil casing is a pipeline for conveying raw materials such as oil and gas Wells, mainly used in the drilling and exploitation process of oil and gas Wells, and plays the role of supporting the well wall, isolating the fluid and transmitting force.

ASTM A179 is a low carbon steel standard for cold-drawn seamless steel pipes used in the manufacture of heat exchangers, condensers and other heat exchange equipment requiring high precision and high pressure resistance. These tubes are designed to withstand high pressures and temperature differences while ensuring efficient heat transfer.

Hollow profile pipe has the characteristics of corrosion resistance, safety, weldability and easy to use, so the product is suitable for various industries. Rectangular tubes, as one of them, are very popular in many mechanical and construction steels, and they are widely used in metal fabrication and joining because of their unique flat surface.

Cold-drawn precision steel pipes are favored in industries that require high precision, durability and excellent performance because of their excellent performance.

Precision seamless steel pipe is a kind of high-precision steel pipe produced by cold rolling or cold drawing process, and its full name is cold-rolled or cold-drawn precision seamless steel pipe.

Seamless square tube is a kind of hollow steel with rectangular cross-section, made of seamless process, with high strength and excellent performance. Seamless square pipe and welded square pipe have the essential difference, compared with solid steel such as round steel, in the bending and torsional strength is the same, the weight is generally light, is an economic cross-section steel.

Square tube, a type of tube often used in building materials and structural decoration. It is usually square or rectangular in cross-section and is usually made of steel plates or strips that are machined, welded, cold-drawn or cold-rolled.

The manufacturing process of large diameter seamless steel tube is mainly divided into two types: direct forming method (generally through hot rolling and extrusion), expanding method (thermal expansion), its manufacturing process is more complex than ordinary seamless steel tube, and it needs to combine material characteristics and application requirements, so as to ensure its dimensional accuracy and mechanical properties.