显示标签为“hydraulic hose assemblys”的博文。显示所有博文
显示标签为“hydraulic hose assemblys”的博文。显示所有博文

2015年2月21日星期六

The package installation and application range of plastic hose connector

Plastic coated metal hose assembly is mainly used in the production and processing of cable protection. Because the plastic coated metal hydraulic hose couplings is light in weight, and flexible with good connecting strength, accessories, electrical properties and oil resistance, water splash and other characteristics, so is widely used in electric power, chemical industry, metallurgy, light industry, machinery and other industries. The package uses plastic hose is the protection of wire and cable as well as for insulation, waterproof, and can increase the cable bending appearance.

2015年2月18日星期三

DPJ external thread connecting metal hose joint structure and properties.

Reliable, connection pipe and the hydraulic hose fittings surface appearance; the metal joint isself fixed type, metal hose connection on the steel pipe to be no threads or non threaded device outlet; adaptation of metal hose: JS type, JSH type, JSB type, JSHG type; adaptation of thin steel wire pipe, steel pipe: Black, galvanized iron pipe (water,gas pipe); selection of DGJ self fixed type hose fittings joint please heed cohesion pipehose specifications, dimensions. Reliable, connection pipe and the metal hose surface appearance; the metal joint for sleeve type, used for metal hose connections on the steel pipe is threaded metal hose; adaptation: JS type, JSH type, JSB type, JSHG type;adaptation: thin steel wire pipe, steel pipe, galvanized iron pipe (water, black the gas pipe); use DKJ card type of metal.
Reliable, connection pipe and the metal hose surface appearance; the metal joint isself fixed type, metal hose connection on the steel pipe to be no threads or non threaded device outlet; adaptation of metal hose: JS type, JSH type, JSB type, JSHG type; adaptation of thin steel wire pipe, steel pipe: Black, galvanized iron pipe (water,gas pipe); selection of DGJ self fixed type metal hose joint please heed cohesion pipehose specifications, dimensions. Reliable, connection pipe and the metal hosesurface appearance; the metal joint for sleeve type, used for metal hose connectionson the steel pipe is threaded metal hose; adaptation: JS type, JSH type, JSB type,JSHG type; adaptation: thin steel wire pipe, steel pipe, galvanized iron pipe (water,black the gas pipe); use DKJ card type metal joint please heed cohesion pipe hosespecifications, dimensions. DGJ self fixed type metal hose joint structure andcharacteristics: DGJ self fixed type metal hose connector, can pipe will be no threadsor non threaded outlet connection equipment export and hose, save the threadingprocess; JINGSHENGFLEX metal joints with zinc alloy material by die casting, the appearance of galvanized, grinding sand, or chromium plating; structure tight, high strength. DKJ card type metal joint structure and characteristics: DKJ card type offlexible metal hose, steel and hose connections will no thread, save the threadingprocess, only the screw is screwed into the can; metal joints with zinc alloy materialby die casting, the appearance of galvanized, grinding sand, or chromium plating;structure tight, high strength. DPJ external thread connecting metal hose jointstructure and characteristics: DPJ external thread connection type metal hose connector is to extend the product JB/GQ0552-83 D95-5 metal joint;JINGSHENGFLEX joint with metal zinc alloy material by die casting, the appearance of galvanized, grinding sand, or chromium plating; structure is strict, non porous, high strength. Reliable connect and metal hose, surface appearance not stingy; the metalconnector for terminating type, used to line linking pieces of metal hose connectionon the box body; adaptation of metal hose: JS type, JSH type, JSB type, JSHG type;recommended by British metal hose connector or metric thread metal joints; can be customized various types of non-standard metal hose connector, particularly a metal joint..

2015年2月15日星期日

Features soft metal joints

1.Corrosion resistance: metal body with soft joints 304 or 316L stainless steel molding, both ends of stainless steel or carbon steel fitting joints with good corrosion resistance. Securing sealing ability. 2. beautiful appearance: the appearance of soft metal joints Cheng Liang, permanent bright as new. 3. The high pressure: Consider the actual operating pressure metal soft joints, using a variety of factors such as environmental conditions and usage, all the parameters have been a careful calculation and trial and error, to ensure their safety at work under pressure. 4. shockproof, anti-dislocation: stainless steel corrugated hydraulic hose assembly has good flexibility and compensation displacement characteristics. 5. Construction is good: for thin-walled metal flexible hose fittings fittings, our main business of stainless steel metal hose, the overall weight, which greatly reduces the load of construction jobs and construction time.

2014年12月24日星期三

Joint metal hose

Stainless steel metal hose joint effects first was the net sleeve are connected into integration, and the corrugated pipe, joint is also a metal hydraulic hose assembly and metal hose or other fittings, equipment connected components. It ensure that the medium in pipeline system in normal operation. Joint data usually with bellows, net sets of data, multiple stainless steel based. In order to decrease production cost, some of the larger diameter metal hydraulic hose fitting in the delivery of corrosion is not strong or non corrosive medium, joint can be used for carbon steel manufacturing; joint metal hose on the corrosive medium task conditions, corresponding measures if the description is adopted, and the medium to avoid the touch, can also choose carbon steel to manufacture. The layout mode of joint generally divided into spiral, flange type and fast type three categories:
1, screw type: diameter 50 mm below the joint metal hose, high pressure in an operation under the condition of multi thread based on, when tightening the threaded in the future, close cooperation of two joints on the inner and outer taper surface, complete seal. The cone angle is usually 60 degrees, 74 degrees is also useful. The layout, good sealing, but the device when necessary ensure the concentricity of the two docking part. In order to deal with engineering practice is often seen repeated disassembly and assembly and not easy to be concentric and other issues, will also be described as conical and ball head joint cooperation.
2, the flange disc: diameter for the joint metal hose is more than 25 mm, often in an operation under pressure, with flanged mainly, which cooperate to mortise way seal. Along the radial change, also capable of sliding along the axial direction of the looper flange connection of two bodies in the fastening bolt tension effect. The layout of the sealing function is good, but the processing difficulty, simple sealing surface bumps. Special occasions quick release in need, can cut the fastening bolt through hole, made quick detachable flange.
3, express: diameter for the joints of various metal hose 100 mm below the condition of using requirements, in rapid loading and unloading, usually choose fast type. O shaped it commonly used fluorine plastic or special rubber seal ring seal. When the handle to move the view must be in the future, the equivalent of multiple threads of fingers locked; the O shaped sealing ring is pressed more tightly, the sealing function is better. The layout in the fire, war and other necessary for fast loading and unloading is most suitable for the occasion. In seconds, not to be matched with any special tools, can butt or open a group of joint.

2014年12月9日星期二

The difficulties and challenges to the development of the industry of stainless steel metal hose

Stainless steel metal hydraulic hose fitting played an important role in modern industry, the application in civil field has a lot of. Under the new situation, the development of the industry is facing many difficulties and challenges, major companies have to show a positive attitude to deal with.
1, technical improvement and independent R & D capacity further enhanced.
A to speed up the construction of industrial innovation system, promote the development of the technology of stainless steel metal hydraulic hose manufacturers and industrial application;
The development of B production of environmental protection and recycling economy, the implementation of national and industry targets of energy saving and emission reduction task, to ease the resource and environmental constraints;
C promotes the stainless steel metal hose industry in a combination of fiber, high-end equipment, energy saving and environmental protection, brand marketing and other aspects of the national strategic emerging industry, cultural industry, especially stainless steel metal hose products in new materials, new energy, energy saving and environmental protection, new strategic innovation in the field of development and application of fiber industry and closely integrated development model.
Enhanced 2, property right consciousness. The relevant government departments to vigorously popularize the knowledge of intellectual property rights, enhance the awareness of intellectual property of metal hose of stainless steel of small and medium sized enterprises. To carry out special training, develop intellectual property management personnel for metal hose of stainless steel of small and medium sized enterprises. Patent counseling, patent agency, patent early warning and patent service stainless steel metal hose is small and medium-sized enterprise activities, cultivate and form a group with independent intellectual property rights of the advantage of the metal hose of stainless steel of small and medium-sized enterprises, improve the industry of small and medium-sized enterprise creation, utilization, protection and management ability of intellectual property.
3, improve the quality and standard management. Small and medium enterprises in the industry to carry out quality commitment activities, establish a quality credit system, improve the quality of honesty and self-discipline level. Small and medium-sized enterprises to strengthen brand building guidance, provide technical support for the stainless steel metal hose of small and medium - sized clothing enterprises to enhance brand value. Promote the industry of small and medium-sized enterprises to actively carry out activities to create a standardized good behavior enterprises, improve standardization level of management.
To be the common role of the government and enterprises development of stainless steel metal hose industry, in government for the industry overall macro control, the difficulties and challenges will be transformed into effective motivation development.

2014年11月26日星期三

Difficulties and challenges in the development of stainless steel metal hose industry

Core Tip: Stainless steel metal hydraulic hose  plays an important role in modern industry, used in civilian areas are also many. Under the new situation, the industry is facing many difficulties and challenges, major enterprises
Stainless steel metal hydraulic hose and fittings plays an important role in modern industry, used in civilian areas are also many. Under the new situation, the industry is facing many difficulties and challenges, the major companies have demonstrated a positive attitude to deal with.
1, technical improvements and R & D capabilities further enhanced.
A accelerate industrial innovation system, promote the development of stainless steel metal hose and industrial applications;
B development of environmentally friendly production and recycling economy, the implementation of national and industry energy conservation objectives, tasks, resources and environmental constraints ease;
C promote stainless steel metal hose industry in fiber, high-end equipment, energy saving and environmental protection, brand marketing and other aspects of national strategic emerging industries, cultural industries combined, especially prominent stainless steel metal hose products in new materials, new energy, energy saving and environmental protection strategy The new innovations in the field of development and application of optical fiber industry closely integrated development model.
2, property conscious. Government departments vigorously outreach intellectual knowledge and improve awareness of intellectual property stainless steel metal hose SMEs. Conduct special training, training for stainless steel metal hose IPR SME managers. Counseling on patents, patent agents, patent and patent warning service stainless steel metal hose SME activities, fostered a number of stainless steel metal hose SMEs proprietary advantage, improve industry SME creation, utilization, protection and management of intellectual property rights ability.
3, improve the quality and standard management. SMEs to carry out activities in the industry's commitment to quality, build quality and integrity of the system, to improve the quality level of integrity and self-discipline. Strengthening SME brand building guide, stainless steel metal hose clothing SMEs to enhance brand value and provide technical support. SMEs to actively promote the industry standard of good conduct business activities to create and improve the management level of standardization.
Development of stainless steel metal hose industry enterprises and governments to be joint action, in the government's macro-control of the overall situation of the industry, the difficulties and challenges will be transformed into an effective driving force for development.

2013年12月16日星期一

The use of high-pressure hose size

When the high-pressure hose be withheld , will always produce withhold too tight or too loose phenomenon, and these phenomena often lead to adverse effects of high pressure hose . Today we say it is the size of the amount withheld would it have any effect on the high-pressure hydraulic hose assemblys . We carried out by the following detailed understanding .Withhold the amount and rate of withholding high pressure hose and fittings assembly when the improper or joint structure and material , size selection is unreasonable, can lead to high pressure hydraulic hose fitting and fittings withholding too tight or too loose will cause early damage to the joints .
When assembled , if the withholding amount is too small, that is between the high pressure hose connector and cut through the loose , high pressure hose there may emerge in the role of oil in the early use from the joint ; If withholding is too large, then the connector and hydraulic hose fittings too tight , easily lead to hose inner being localized damage, cracks , directly into the high-pressure oil from the ruptured steel layer , and then he went to the wire along the gap between the spray coat tails , or has fled somewhere along the wire layer build up , so that the outer layer of plastic to produce drum kits and even rupture . Hoses and connectors in the assembly, if the withholding too fast, likely to cause damage to the plastic layer and the wire break, so that premature failure of the hose in use .
The above information is very detailed description of the effect of the size of the amount withheld for the use of high-pressure hose produced , so we need considerable attention when using this withholding his dosage size is accurate, whether the mutation will produce high pressure hose , etc. problems should close attention.

2013年12月8日星期日

Shrink cable joint processing preventive measures and treatment

After stripping the cable insulation , the main application of fine sandpaper carefully polished surface of the insulation layer , making it smooth and no marks, no semiconductor residual points . The insulation must be cleaned with a cleaning solvent shield direction from the core to the semiconductor , do not use the shield layer in contact with the semiconductor cleaning paper to clean the main insulation layer on the surface .After crimping wire core , application file, sandpaper carefully polished to eliminate edges and tip , and pay attention to metallic particles may not remain on the surface of the insulating layer .Special attention should be in the process of making the cable connector to keep clean , and should try to shorten production time , after stripping the cable cut , exposed in the air longer, the possibility of invasion of impurities , water , gas , dust, etc. , the greater , thus impact of joint quality . Therefore required before construction to do all the preparatory work to ensure the production of non-stop , go.
    
Before making
hydraulic hose fittingto carefully check the cable accessories and cable facilities, so as to strictly control the amount of interference shrink silicone rubber insulating sleeve , to ensure that they have sufficient grip force , close contact with the interface , there is no gap .
    
Semiconductor adhesive tape were wrapped in shrink after each phase of silicone rubber composite insulating sleeve two port. Thus , both the silicone rubber outer casing outside the semiconductor layer and semiconductor XLPE cable shield good contact , but also play a role in the axial waterproof .
    
Surrounding the self-adhesive waterproof tape, shrink
Hydraulic pipe fittings seal is proof key to a semi- joint overlap method from one end to the other end wrapped and then wrapped in the opposite direction from one end to the starting side, wrapped in two layers. After each wrapped with both hands clasped in turn again, to make it better bonding. Be sure to pull when properly wrapped , so tightly wrapped seamless .

2013年12月5日星期四

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

factors that affect the use of the hose assembly

Many factors will affect the use of the hose assembly . The first is the size of the hose . Inner diameter of the hose to the right, if it is too small, will affect efficiency. If the inside diameter is too large, will affect the overall system performance of the play. Therefore , it is important to select the appropriate inner diameter . Second ,hydraulic adapter  will also affect the temperature range of use. If the hydraulic hose working environment temperature exceeds the specified range , then the hydraulic hose pressure capacity will thus be greatly reduced. Experts suggest that if the high or low temperature working environment , should be put on the hydraulic hydraulic hose fitting jacket . In addition to the above two factors , the use of hydraulic hose assembly Hose working pressure is also affected by the impact stress and fatigue life , impact bending radius and chemical compatibility and other factors.Hydraulic hose assembly in our lives is very wide, in the mining industry , agriculture and industrial sectors have a lot of use . It is transmitted through water and gas or oil substance hydraulic power to ensure adequate fluid energy during operation.

2013年11月27日星期三

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

By utilizing high pressure hose and connector assembly and pressing speed selection

By utilizing high pressure hose and connector assembly and pressing speed selection, or joint structure and material, size selection is not reasonable, can lead to high pressure hose and fittings withhold too tight or too loose, can cause joint damage early.The assembly, if the withholding amount is too small, the joint and the high pressure hose pressure too loose, under the action of oil pressure hose at the initial stage of use is likely to emerge from hose fittingthe joint; if the withholding amount is too large, joint and hose pressure too tight, easily lead to hose inner layer by local damage, crack, high pressure oil from the ruptured directly into the wire layer, then along the rear of the jet slot channeling to coat steel wires, or has been along the wire layer channeling somewhere accumulates, the outer layer of hydraulic tube fittingsdrum kits and even cracking. Hose and connector in the assembly, if press speed too fast, easy to cause damage and fracture of the glue in the wire layer, so that the hose damage early in use.
The above information is very detailed description of the effect of the size of the withholding amount produced using high-pressure hose, so we use the press to considerable attention, he dose size is accurate, if the high pressure hose mutate and so on should pay close attention.

2013年11月21日星期四

Copper brazed directly Problems

Direct Copper brazing mainly two: the need to use corrosive aluminum brazing agent to remove the oxide film, moisture absorption flux residues form an electrolyte constituting the strong corrosive; aluminum, copper atoms diffuse faster, easier plastic Hydraulic adaptersconnector in the package forming fusible eutectic brittle, leading to joint strength is low, and the electrode potential than the electrode potential is high, prone to intergranular corrosion. Thus, aluminum and copper is generally believed that direct brazing is difficult. In order to prevent oxidation of solder joints, preferably in an inert atmosphere, the production of furnace, heating by hydraulic hose fittingresistance heating or flame brazing.
In order to avoid the formation of aluminum and copper brittle compounds, aluminum and copper atoms necessary to avoid direct contact, and to avoid corrosive flux caused by corrosion problems, can be coated on the surface layer of metal (such as nickel), and then with Brazed , to avoid the formation of aluminum and copper brittle compound, but also can be used corrosive or non-corrosive flux, thus increasing the joint strength and corrosion resistance.

Pack plastic hose connector installation and application

Plastic coated metal hose is mainly used for the production, processing cable protection. Because plastic coated metal hydraulic hose assemblys with light weight, good flexibility and strength of the connection accessories, electrical properties and oil, splash water and other features, so often widely used in electric power, chemical industry, metallurgy, light industry, machinery and other industries. hydraulic hose fittings plastic bag purpose is to protect the wire and cable and insulation, waterproof, can increase the cable bend beautiful.Although compressible metal hose can stretch, but if you do not install the correct position, it will soon break, reduce the service life. Hose plastic bag selection, reference should be corrosion hose material machines and corrugated plastic coated metal hose DN, use, the first cable wires through the pipes, matched with the corresponding model DPJ type connector that available.

2013年11月12日星期二

High pressure hose for the oil and rubber inner wall

High pressure hose for the oil and rubber inner wall , in the middle of braided steel wire ( steel braided hose ) or winding wire ( wire winding hose ) . Poor quality of the hose will appear : plastic wall of uneven thickness ; steel braided too tight ( wire stroke is small ) , too loose ( steel travel large ) or wire root too few ;hydraulic ferrule pressurized deformation ( elongation , shortening or bending deformation ) larger ( national standard steel stroke control of plus or minus 3 ) ; airtight plastic outer lead wire corrosion poor ( main manifestations : Lu steel ) ; inner plastic seal is poor leaving the high pressure oil easily into wire layer ; adhesion layer and layer of wires inadequate . The above conditions can cause hydraulic hosesto withstand reduced, eventually appears at the wall of the weak burst. Especially in the inner layer , poor air tightness , then a pressure, it leaks, then the pressure directly burst.

High oil and high-pressure hose

High oil and high-pressure hoseSuch highhydraulic tube fittings , mainly used in construction machinery , the use of high strength , high frequency . Strong corrosion resistance and pressure resistance . We can see a lot of construction vehicles, especially excavators, particularly evident , it is now everywhere, not only that, the excavator head is getting bigger , the job has become increasingly pursuit of high intensity , heavy , frequent trend.