Stainless steel pipe(stainless steel welded pipe) is a kind of hollow long cylindrical steel, which is mainly used as a pipeline for conveying fluids. Widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial pipelines and mechanical structural components.

Factors that affect the corrosion resistance of large-diameter rectangular tubes include chloride ion corrosion, lack of solution treatment and natural intergranular corrosion.

Two main factors should be considered when designing a square tube section: one is the safety of the section; the other is the economy of the section.

Seamless steel pipe for fire fighting is resistant to weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, also called stainless acid resistant steel pipe. What about the oxide skin of seamless steel pipe for fire fighting in long-term use?

The bevel form of square tube has a very important role in controlling the internal quality of the weld and the manufacturing quality of the welded structure.

Drill pipe is a steel pipe with a thread at the end, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. The purpose of the drill pipe is to transport the drilling mud to the drill bit and together with the drill bit raise, lower or rotate the bottom hole device.

SSAW steel pipe is made by rolling low-carbon carbon structural steel or low-alloy structural steel strip at a certain helix angle (called forming angle) into a tube blank, and then welding the pipe seams. Steel produces large diameter pipes. The connection methods of ssaw steel pipe include flange connection and groove connection.

There are often some wastes such as automobile oil and dust on the surface of the rectangular tube, which will affect its quality. Therefore, it is very necessary to clean the rectangular tube. The cleaning methods generally include caustic soda solution cleaning, caustic soda solution immersion, electrolytic cleaning, boiling water immersion, etc.

In the processing of stainless steel seamless pipe, we know that for many chemical elements content is standard, the phenomenon of inaccurate element content should be adjusted in time, otherwise it will have a great impact on the quality of steel pipe.

According to the requirements of the LSAW steel pipe produced, reasonably select the steel type, specification, allowable deviation and production method of the required raw materials.

Rectangular tubes are made of hot-rolled or cold-rolled strip or coil as the base material, cold bent and then high-frequency welded sections of square cross-sectional shape and size, with various specifications.

Rectangular tube is a kind of hollow long steel, also known as flat tube, flat square tube or square flat tube. A large number of pipes are used for conveying fluids, such as oil, natural gas, water, gas, steam, etc.

Common anti-corrosion architectural coatings for square pipes include asphalt, polyurethane materials, styrene epoxy resin, zinc-rich architectural coatings, chlorosulfonated high pressure polyethylene and epoxy resin glue.

The seamless square tube is a square steel tube with four corners. It is a square steel tube formed by cold drawing and extrusion of a seamless steel tube. Steel pipes have hollow sections and are used in large numbers as pipes for transporting fluids.

The difference between seamed steel pipe and seamless steel pipe is mainly in terms of definition, processing technology, use, appearance, pressure and price.

Rectangular/ Square hollow section are formed from coils and then ran through a series of dies. They are are welded from the inside to form their shape.

Phosphating is a whole process of organic chemical and electrochemical corrosion to generate polyphosphate conversion film. The established polyphosphate conversion film is collectively referred to as phosphating film. It can play a very large effect and can improve the anti-corrosion ability of the q345b square tube. What should we pay attention to when we carry out phosphating treatment of q345b square tube?

The use of compressed air and spray gun to atomize the paint to construct the rectangular tube is called the spray method, which is characterized by the uniform thickness of the coating film obtained, the appearance is smooth, and the production efficiency is high.

The surface quenching and tempering heat treatment of erw steel pipe is usually carried out by induction heating or flame heating. The main technical parameters are surface hardness, local hardness and effective hardened layer depth.

Square tubes are classified by use: square tubes for decoration, square tubes for machine tools, square tubes for machinery industry, square tubes for chemical industry, square tubes for steel structures, square tubes for shipbuilding, square tubes for automobiles, square tubes for steel beams and columns , special purpose square tube.