It is forbidden to degrease the oil square pipes and pipe fittings in the direct production concentration unit,TczewGalvanized JDG pipe, air separation unit, oil refining and chemical engineering according to the design requirements. The purpose of degreasing is to prevent the transported or stored materials from being contaminated by grease or organic matter; Avoid mixing transported or stored materials with grease or organic matter; Oil content to ensure the activity of the catalyst; The content of oil and organic matter to ensure the purity of the product. The installed square pipe shall be disassembled into pipe sections for degreasing. Pipes that cannot be disassembled after installation shall be degreased before installation. Square pipes with obvious oil stains or serious corrosion shall be cleaned by steam purging, sand blasting or other methods before degreasing.
Functional index analysis of square tube - angular plasticity refers to the power of plastic deformation (permanent deformation) without destruction of square tube data under load.
Tczew.Alloy steel: A. low alloy steel (total alloy element content & le; 5%); b. Medium alloy steel (total alloy element content > 5 ~ 10%); c. High alloy steel (total alloy element content > 10%).
How to reduce the amount of oxide scale is the key to the heating operation of seamless square tube. Especially when it's hot. Starting from the service life of tools and the surface quality of pipes, the requirements are more stringent. For example, hot furnaces are divided into heating furnace and reheating furnace according to their functions; The former is used to heat the blank from normal temperature to processing temperature; The latter is used to reheat the blank to the necessary processing temperature during processing.
.The standard quantity of combustible and nonflammable square pipes is gbt97-1 (gbt97-199). The representative material is l245-l4 pipeline steel. Professional square pipes, square rectangular pipes, seamless square pipes, galvanized square pipes and galvanized pipes are of high quality and low price. They are fire-resistant, waterproof, high temperature resistant, durable, safe and reliable. They are mainly used to transport combustible and nonflammable fluids with high requirements.
The advantages of real bending are small reverse, accurate forming, and as long as the roll shape is accurate, the R of inner corner forming is more accurate.
The tensile test is to make q355b into a sample, pull the sample to fracture on the tensile testing machine, and then measure one or more mechanical properties. Usually, only tensile strength, elongation after fracture and reduction of area are measured. Tensile test is the basic mechanical property test of metal materials. Almost all metal materials have specified tensile test as long as they have requirements for mechanical properties. Especially for those materials whose shape is not convenient for hardness test, tensile test has become the only means to test mechanical properties.
The standard number of spiral square pipe (standard of the Ministry of petroleum) for low pressure transmission is syt5037-2008. The representative materials are q235bq345b and other carbon steel materials. It is mainly used for low-pressure transmission of water, oil natural gas,TczewQ345B seamless rectangular tube, heating and other pipelines.
Steel pipe for geological drilling (yb235-7) is a steel pipe used by geological departments for core drilling. It can be divided into drill pipe, drill collar, core pipe, casing, sedimentation pipe etc.
Now, Fangguan can achieve such good results in the market, which is completely inseparable from the manufacturers' hard work in technology. I believe that the Fangguan market will be better and better in the future.
middleman.The test can be carried out under cold and hot conditions. If the test temperature is not specified the test shall be carried out under normal temperature, but not lower than - 10 ℃.
HDPE plastic square pipe made according to the properties of square pipe has the advantages of light texture, high strength, easy laying, low water resistance, low cost and corrosion resistance. Its service performance and economic benefits far exceed reinforced concrete pipe and general specification iron pipe. It is an updated product of engineering pipe.
When cutting the sample, the surface of the sample shall not be damaged, the properties of the metal shall not be changed due to heating or cold processing, and the edges at the section shall be rounded.
Classification of surface treatment square pipe is divided into hot-dip galvanized square pipe, electro galvanized square pipe, oiled square pipe and pickled square pipe according to surface treatment.
assets.After aluminum deoxidation in molten steel, & omega; When (ALS) is 0.015% ~ 0.025%, calcium treatment can achieve better effect on the denaturation of Al203.
Square tube heating process square tube calculates the chip thickness of 130185 workpiece. After each regrinding, the service life of the saw blade. Regrinding times of the saw blade. When the saw blade is replaced, the main drive AC motor spindle rotates stepless speed change AC motor feed capacity stepless speed change feed fast return to a constant value center system brush device hydraulic 3 saw cutting system system system represents the quality RA flatness, large burr height cutting Chip length tolerance dimension: width and length 0.1 ~ 0.15mm 10 ~ 20m2 8 ~ 10 3 ~ 5min 55kW 34 ~ 90rpm (18 9kw 100 ~ 2000mmmin 8000mmmin 0.1kw 0.12kw 2 & times; 75kW S7 25 & mu; m 0.5100 2mm & plusmn; 1mm about 2850mm about 1200mm about 1920mm high. The total weight of each billet square tube is 70 seconds (including, pipe blank cutting, saw blade return, opening device, pipe blank discharge, head and tail cutting time, but excluding pipe blank transportation time). The large production capacity of the three saws is 500000 T / A. the pipe blank saw has a special reversing device (hydraulic servo device) to reduce vibration and improve the service life of the saw (only during feeding). The sawing machine has two devices distributed at the inlet and outlet (the input area is supported by roller table to ensure the bending of billet) The inlet end after sawing. Open it to ensure that the saw blade does not contact the blank when it returns. & mdash; feed saw gear & mdash; saw gear vibration reduction, which is composed of a fixed gear vibration reduction as a movable vibration reduction to avoid the axial of the saw blade. & mdash; brush and sweep device & mdash; a driving brush and sweep device is installed at the bottom of the saw blade to clean the iron filings on the teeth and will not affect the service life of the saw blade. &Mdash; saw blade. In order to improve the service life of the saw blade, a small amount of high load agent container is atomized by air and poured on the saw blade without residue. & mdash; saw blade cooling device. A special nozzle is used to spray cold air at - 5oC on the saw blade. The cut-off blank is transferred to the buffer chain in front of the loader after passing through the outlet roller table and weighing device (Note: 3# before sawing, there is a feeding bench for single size billets that need to be cut, and after weighing, there is a feeding bench for returned billets). The buffer transfer chain transports the billets to the lower roller table of the loader. The billets are turned over from the chain to the roller table by the turnover hook. The weighed qualified billets are loaded into the annular furnace by the loader, and the weighed unqualified billets are transported from the roller table to the removal bench for removal.
Two main factors should be considered in the design of square pipe section: one is the safety of the section; the other is the economy of the section. For the safety of the section, we require that the ratio of waist thickness to height of H-section steel should not be less than 145. For H-section steel used as column, its economy is expressed by the ratio of torsion radius to its mass.
Tczew.Ordinary carbon steel is divided into Q19 Q2 q23 SS400, 20# steel, 45# steel, etc.
Now in many construction projects, we can see the shadow of q355b square tube, and the performance and quality of deformation, stamping, cutting and other processing are based on hardness, which is also the guarantee of mechanical properties. Based on the above,TczewSquare tube rectangular tube, and then test the indentation depth or size, so as to determine the hardness of the material. Hardness test is simple, rapid and easy to implement in material mechanical property test. Hardness test is non-linear, and there is an approximate conversion relationship between material hardness value and tensile strength value. The hardness value of material can be converted into tensile strength value, which is of great practical significance.