FreeportHot dip galvanized steel pipeIf you want to improve processing efficiency

Application of square tube products: for mechanical equipment, solar energy equipment, steel structure, automobile parts, bridge ground pile, guardrail and ship internal structure.

The surface compressive stress characteristics of the square tube will be obtained after isothermal quenching.

Freeport.Generally, chemical and electrolytic methods are used

In case of doubt about the strength of solid q355b square tube, it can be based on tb10426 & mdash; 200 the compressive strength of q355b square tube on the surface of the structure is indirectly measured by the post loading method. The measurement should be carried out at the age of about 56 days, and the measured average strength is required to be not lower than the design value or the specified value. When the requirements are not met, the core drilling sampling method can be used for verification.

.Strictly feed Si Ca wire quantity to ensure effective & Omega in steel; When (CA) is about 0.002%, the inclusions can be fully denatured without generating more high melting point inclusions.

The raw material for rolling square tube is round tube blank. For a long time, square tube,FreeportPrice of galvanized square pipe 100, rectangular tube, seamless square tube, galvanized square tube and galvanized tube have complete products, excellent quality and favorable price. The round tube embryo shall be cut and processed by cutting machine, it should be pierced through the pressure piercer. Generally, the more common piercer is the conical roll piercer. This piercer has high production efficiency, good product quality, large perforation expansion and can wear a variety of steel grades.

In different environments, the use efficiency of square tubes is different. According to the quality of square tubes, we will conduct progressive research on them, hoping to develop better square tubes. No matter what environment, we will make square tubes suitable for use. Then what is the role of shot blasting and sand blasting in each other's pipe? Next, let's introduce it to you.

At present, and are widely used in many scientific and technological fields. Therefore strong corrosion resistance and heat resistance, even so, wise people still do not stop studying the surface adhesion resistance of square tubes. Square tubes in the future will have better performance and make more important contributions to development.

Square tube has a wide range of application fields. Its main field is the construction industry, the production design of square tube hole is also different. Next I will introduce in detail the types of tube hole design below.

Stainless steel q355b square pipe for mechanical structure,FreeportGalvanized square pipe rectangular pipe, Standard No.: gbt12770-1991. Representative material 0Cr 1cr1 00cr19ni 1Cr18Ni 0cr18ni11nb, automobile, bicycle, furniture, hotel and restaurant decoration and other mechanical parts and structural parts.

Discount.During the storage of square tubes, pay attention to the stacking layers of square tubes to avoid local stress at the tube end caused by too many layers, resulting in radial plastic deformation and layer damage of square tubes. It is recommended that the stacking layers of smooth pipes refer to apirp 5l1-2009 Recommended Practice for railway transportation of square pipes for pipelines or apirp 5lw-2009 Recommended Practice for ship and sea vessel transportation of square pipes for pipelines. It can also be determined by test or implemented according to the safe stacking height of square pipes. The stacking layers of pipes shall be implemented according to GBT 23257-2009 polyethylene layer of buried steel pipelines.

High hardness square tubes mainly bear fatigue load, so they must have high hardness. Therefore quenching, surface quenching or chemical heat treatment shall be carried out, followed by low-temperature tempering treatment.

After the process of polishing, the surface effect of the square tube is quite good. The quality of the polishing process directly affects the external image of the square tube. Therefore, we must choose the appropriate polishing according to the above, and pay more attention to the polishing process of the square tube.

Formulate the documents stored by the square tube for a long time and implement them in accordance with.

Convenient and efficient.Spiral square pipe for low-pressure transmission (standard of the Ministry of petroleum), with the standard number of syt5037-2008. The representative material is q235bq345b and other carbon steel materials. It is mainly used for low-pressure transmission of water, oil, natural gas, heating and other pipelines.

Section shape classification square tubes are classified according to section shape: simple section square tubes & mdash& mdash; Square tube, rectangular tube and complex section square tube & mdash& mdash; Surface treatment classification of flower shaped square pipe, open square pipe, corrugated square pipe and special-shaped square pipe square pipe is divided into hot-dip galvanized square pipe, electro galvanized square pipe, oil coated square pipe and pickling square pipe according to surface treatment. Square pipe is classified according to purpose & mdash& mdash; Square tubes for decoration, machine tools and equipment, machinery industry, chemical industry, steel structure, shipbuilding, automobile, steel beam and column and special purpose are classified by wall thickness & mdash& mdash; Super square tube, square tube and thin-walled square tube plasticity refers to the ability of metal materials to produce plastic deformation (deformation) without deformation under load.

In terms of hot working, repeated upsetting and multi-directional rolling of ingot can not only reduce the level of carbide segregation in square tube, but also improve the anisotropy of steel.

Freeport.The iron filings and burrs on the cutting section shall be completely removed with a file or appropriate tools to prevent the iron filings and burrs from scratching the rubber O-ring and other accessories when connecting another part.

At the same time, the heating temperature and heating time will also have a great impact on the performance of square tube. The heating of square tube blank is the key process to ensure that the square tube blank has enough plasticity and complete the smooth perforation. If the heating temperature is too high or the heating time is too long, the billet of the square tube will be burned and decarburized, and even the chemical composition of the square tube will be unqualified (unqualified carbon content), which is easy to cause batch quality problems and seriously affect the product qualification rate.

In fact, the casting cleaning is not just shot blasting. For large parts, the drum sand cleaning is carried out first, that is, the riser of the casting is cut off and rolled in the drum, and the square tubes collide with each other in the drum to remove most of the sand on the surface before shot blasting or shot blasting.