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

Stainless steel metal hydraulic hose fittings 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.

Hydraulic ferrules cold deformation, flaring, flattening no cracks

Hydraulic ferrules is one of the three parts of the card sets of pipe joints (ferrules, nuts, seamless steel pipe) composed. Hydraulic ferrules working principle is the seamless steel insert card kit, ferrule nut using inconsistent card sets, card kit seamless steel blade evenly cut, form an effective seal. Hydraulic ferrules type straight pipe hydraulic flanges  are widely used in oil refining, chemical, oil, gas, food, pharmaceutical, and other instruments. Hydraulic ferrules high accuracy, good finish, inside and outside the walls of the heat pipe no oxide layer, the hydraulic hose assembly wall of cleanliness is good, pipe withstand high pressure. Hydraulic ferrules cold deformation, flaring, flattening no cracks, deformation and can make a variety of complex mechanical processing. Hydraulic ferrules joints inside and outside the installation need to take over the interface and connection fittings are handling clean. Be sure to take over the mouth of the polished smooth surface can not have glitches and uneven surfaces.

Daily maintenance of rotary joint

1, should maintain the internal rotary hydraulic adapter fittings and pipeline cleaning roller. Special attention should be paid to the new equipment, when necessary to add filters, in order to avoid the abnormal wear of adapter caused by foreign body.
2, if the machine is not used for a long time will cause scaling and rotating hydraulic hose adapters internal rust, such as reuse will occur the death card or drip situation.
3, with the oiling device regularly oiling, ensure the reliability of the operation of the bearing rotating joint.
Swivel joint 4, the circulation body medium should be gradually warming, avoid temperature blast.
5, check the sealing surface wear change status and thickness (normal wear is 5 - 10mm); observation of the sealing surface of the friction track, appear whether three point intermittent or scratches and other problems, such as the above situation, should be replaced immediately.
6, rotary joints should be handled with care, strictly affected, so as not to damage the joint member.
7, it is strictly prohibited to foreign body into the rotary joint internal.
8 rotary joint, not long-term idle.

Metal hose selection

For a certain length and gauge metal hose, its ability to withstand stress and shock have certain limits, therefore, when used to choose according to the actual situation. Generally used with a nominal hydraulic hoses pipe same nominal diameter, length of the hose under the sink array of tanks, lateral displacement temperature deformation, misalignment, and other factors to produce an earthquake to determine. Corrugated metal hydraulic ferrules, nets and joint composed of three parts, bellows are made ​​of stainless steel, with good flexibility, small longitudinal rigidity and bending stiffness, can work within a radius of curvature of the nominal, with strong corrosion resistance and good temperature stability. Nets from the strengthening of the role of the metal hose with a larger carrying capacity. Therefore, the metal hose with shock, subjected to bending, absorb stress.

Development of hydraulic hose assembly

After a few years of rapid development of reform and opening up , China's hydraulic hose assembly industry has made tremendous progress , their results were witnessed world , due to the development of Jic hydraulic fittingsassembly industry , the whole process of industrialization has also been driven up, get up vigor and vitality. Now, in the 21st century , especially after the party's 18 , China's economic development has entered a new phase, corresponding , for many industrial sectors and departments have also made ​​new demands. Therefore, as a hydraulic hose assembly industry , the need to establish a new development ideas, promote their own development and to adapt to the new era of development plans and ideas.First, companies should establish a people-oriented business ideas. Fully excavated talent, use of personnel , with talents for the development of enterprises to make a great contribution. For this reason , companies should be based on their actual situation , the construction of a mining standards and procedures of talent, and talent to make a different for different but appropriate arrangements to allow these people to give full play the initiative in different positions forhydraulic tube fitting industry to contribute their value.Second, enterprises should also be market-oriented, proactive , rather than passive waiting for the market ruling. With a lot of uncertainty on the market , these uncertainties , for the enterprise, is a potential threat , it will affect the interests and long-term development of enterprises. Therefore, enterprises should establish a set of internal hydraulic hose industry market response plans for a variety of problems that may arise , emergency preparedness , in order to achieve the purpose of being prepared .

use of the 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 hose . 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 hose and fittings withholding too hydraulic hose assemblysor 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 hose too hydraulic tube fitting , 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.

Because plastic coated hose connector design unreasonable phenomenon caused by the failure

Pack plastic hose connector design is essential, which is the core technology of hose assemblies. In actual operation, including plastic Hydraulic adapters connector design is often not a good grasp of various key points, it will cause a variety of failures. Because plastic coated hydraulic hose assemblys connector design failures caused by the unreasonable phenomenon is most prevalent are withheld at the inner tube longitudinal cracks appear and circumferential cracks are two, there are other symptoms, but not common. There are the following two: 1 withhold longitudinal cracks appeared at the inner tube site withhold the end of the sleeve, the inner tube vertical microcracks appear, once a crack running through, it will result in failure of two hydraulic tube fitting assemblies withheld at the inner tube circumferential cracks appear in actual use, and the testing process is also one of the more common symptoms. Inner tube circumferential cracks appeared after the weak link here will become, along with the gradual extension circumferential cracks, often in the form here leak, resulting in failure of hose assemblies.

Butt weld dissimilar metal joints

Dissimilar metal joints or butt weld two different metals from the base material welded directly or using the first isolation layer added, after the method of welding, in the latter case, the spacer layer and a joint assessment of the welding process can be performed hydraulic flangesimultaneously .Taking into account the performance of existing materials, in all cases, especially in the cut specimen should be cut so that the specimen should be able to reflect the characteristics of each connection area and observe the following precautions:Transverse weld test should have been done the base material, the isolation layer (if any) and weld hydraulic fittings. Bend test shall be to make the fusion line, the isolation layer, deposited metal under stress manner. The number of samples and sampling method with the joint geometry should change.

Hydraulic fittings structural characteristics of the hydraulic system

Hydraulic fittings hydraulic system due to its simple structure, flexible layout , good self-lubricating components , easy , and combined with other transmission methods . Therefore, at present most of the equipment in all types of enterprises on a wide range of applications . I plant all tending electrolysis , casting machines and tipping hybrid furnace and other key equipment are used the hydraulic fittings system . The hydraulic system of hydraulic pipe fittings are generally closed loop piping system, hydraulic hose assemblys system failure is difficult to locate hidden main disadvantages of hydraulic drive . Equipment failure of the hydraulic system as soon as possible once the cause of the fault and immediately removed to reduce parking due to equipment caused economic losses. Engineering and technical personnel required by virtue of their professional and technical skills, basic knowledge of hydraulic ferrule transmission , hydraulic fittings components and the basic principles of structural knowledge loop failure analysis.

Joint leakage prevention, protection of life

In the hydraulic system, both the metal pipe coupling, or hydraulic hose fittings, there are prone to leakage problems. For ferrule fittings, mostly due to pipeline subject to greater external force or impact, so that the card sleeve loose or deformed face caused by leaking pipe, you should check whether the card holder out of round, whether the defect edge, whether the pipe ends intact and nut, compression level, etc., while also eliminating pipeline force.Hydraulic pipe fittings hose fittings for flared fittings, mostly due to excessive flaring, quality, undesirable or multiple demolition, resulting in flared cracks or deformation caused by leaks, then you can be re-flared front truncated. If you use a male and female cone top pressure seal, the leakage is mostly due to two cone damage, Hydraulic adapters hose fittings available on the cone abrasive grit grinding. In some with "о" or outer-ring face seal by the occasion.

The structure and properties of metal hose introduction

Corrugated metal hose is a modern industrial pipeline a high quality flexible connecting tube . It mainly consists of metal bellows , metal mesh and various different forms of joint components. It is a spiral -shaped corrugated inner tube or annular corrugated thin-walled stainless steel bellows , bellows outer sleeve made ​​of stainless steel wire mesh or stainless steel woven according to certain parameters . Hydraulic tube fittings at both ends of piping or equipment in accordance with the user 's joint form prepared . Metal bellows hose is made of stainless steel seamless or longitudinally welded stainless steel thin walled tube through precision molded plastic deformation . Bellows hose contour determines the elasticity of softness and fatigue resistance , easy to absorb all kinds of sports deformation and cyclic loading , especially to meet the system larger displacement compensation . Corrugated metalHydraulic hose fittings has good flexibility , fatigue resistance , high temperature resistance, corrosion resistance , and many other excellent features, it is relative to other types of hose ( rubber hose , plastic hose ) lifetime is much higher , with the the development of modern industry , resistant to high temperature , high pressure , corrosion-resistant corrugated metal hose is increasingly widely used.

Metal hose applications industry

Metal hose applications industry1 , metallurgical industry , metal hose is gradually transition to competition from product performance competitive cost performance , product structure in shape, the metal hose industry applications has been widely recognized .2 , the petrochemical industry , the situation is relatively complex, on the one hand , large-diameter high-pressure hose and tank drain hose central market demand is growing, and new product development in the field of domestic far failed to put in place . On the other hand , some other occasion hose has appeared the phenomenon of alternative products such as dock appearing on the market with a non-metallic Hydraulic adapters conduit tube ( light weight , pressure fit ) . As the petrochemical industry is now the largest domestic market hose , various competitive in this field , input cost of new product development in this area is also larger .3 , railway locomotive industries. As used by the Ministry of Railways information required on the form of a composite hose made ​​stereotypes provisions will not be great changes in the product mix in recent years , mainly manifested as price and service competition. But in the long term, the use of complex conditions , the uncertainty of the composite hose damage from abroad perspective of the development of the industry hose , metal hose being replaced is inevitable, so the product development is still far from over.4 , shipbuilding Hydraulic ferrules industry, product testing by the Society in addition to need , but no special technical performance requirements, but according to foreign domestic data, its market demand is also huge. 5 , civil construction , irrigation installation and other industries, in addition to some of the stereotypes of the hose outside ( such as plumbing , etc. ) , thick-walled tube instead of the trend of domestic elbow yet developed , according to Japanese data show that as much as their domestic water heater application prospects hose market.

English expression fittings

Some of pipe fittings industry jargon is no specific point in the online English translation, the major off pipe fittings manufacturers also do not have English Introduction. Such as tube fittings, terminal through connector, plug-welding elbow, two-way connector body and so on. Tee: three-way pipe connector terminal through connector: Straight thread connector plug welding elbow: Through welded elbow-way connector body: bidirectional Hydraulic ferrules pipe fittings, intubation pieces, threaded pipe fittings Butt-English names are welding fitting (referred BW Fitting), Socket welding fitting (abbreviated SW fitting), Threaded fitting. Fittings, pipe fittings may be on domestic non-standard argument. About the tee, is divided into equal tee (Equal Tee), also known as straight tee (Straight Tee), and reducing tee or Reducing Tee (Reducing Tee), in the actual business dealings, the general would not have said fitting it.

Cracking Analysis of high-pressure metal hoses

Chemical composition of the base metal hoses meet the standard requirements , microstructure normal . Failure hose member and the base metal and weld finished piece unused micro-cracks are present on the hose , the hose which indicates that micro-cracks before they are used . According to the position and shape of micro-cracks can be divided into two categories: one is located on the weld , the weld along the direction of the main direction of the crack , in addition to many cracks perpendicular to the main secondary cracks , these cracks are located weld intergranular columnar crystal Hydraulic tube fittings is formed when the welding weld cracking ; second crest of microcracks in the inner surface of the hose , these micro- cracks in the circumferential direction along the hose (Up direction perpendicular to the weld ). and substantially parallel to each other , since the majority of these micro-cracks exist in the inner surface of the crest , and the analyzes were performed by location and morphology with regularity , so these cracks should be rolling waves generated when processing cracks. In welding and molding process , the micro crack initiation at the inner surface of the hose in the subsequent assembly process of trial and the use of extended fatigue microcracks , finally cracked through , causing oil spills . Recommended welding hose and processing to improve, in order to avoid the generation of microcracks .

Hose technical knowledge

With the rapid development of modern industry and the mutual penetration of various disciplines, metal hose in the machinery manufacturing, petrochemical, instrumentation, and is widely used on various projects. Nearly three decades, it has expanded used in aerospace, aviation, nuclear power, shipbuilding, electronics and new construction and other industrial sectors, a modern engineering technology indispensable accessory, plays a prominent role. In China, it appears the early fifties the most Hydraulic tube fittings  metal hose, which is based on the strip is wrapped around the body of the bellows. However, it is developing very fast, after five years or so, we have gone through other countries traveled nearly a hundred years. Currently, we have been able to produce some reached the international advanced level of metal hose. However, due to technical exchange and standardization issues, a number of technical personnel in the field of design of the structural characteristics of modern metal hose, performance indicators is not very clear, resulting in a lot of new metal hose should use the occasion still use those structures in the form of relatively old metal hose, rubber tubes and plastic tubes. Universal metal hose technical knowledge, is to enable more people to become familiar with and master the knowledge of modern metal hose for wider and more reasonable to use it.

Metal hose pavement construction requirements

Metal hose construction, the use of sub-construction method, previously used in the original arch culvert base angle side by side two, the length determined based on long culvert. Culvert advance for the rails, corrugated culvert pipe diameter according to project needs may have different specifications, ready to pipe diameter of 0.5m - 2.5m; each section of pipe length 3 meters. Using internal (external) flange bolts. Assembled pipe diameter of 3m - 8m. Each circumferential direction 4 --- 15 plates, lap board and the board strength bolts tightened. If Han longer than 30 meters, the corrugated culvert culvert sides of the original width of less than 80cm, length 3m-6m may be downstream or upstream culvert advance toward the one end, in place later, it can be fixed to the top of the sheet rock masonry end wall, the other end of the corrugated culvert culvert with sandbags or the distance between the mortar and stone block, width 50cm, then start filling. Both sides of the law can be dense or coarse watertight concrete pouring Vibes tamping; top with high-pressure pumping expansive cement mortar. This section tube four weeks after they have finished filling the second pipe shipped to carry two connections, corrugated culvert pipe are connected to the inner flange bolting, workers in the pipe connection. After connecting to the same method as backfill. In this order, to complete the construction of the entire road corrugated culvert work. Metal hose adapter, according to the selection of electrical equipment into the cable connector metal hoses and metal Hydraulic hose fittings , metal hose fittings according to the size of the transition metal hose connector panel mounted connector and metal hose, so that the whole system is naturally smooth; transition joints can either press the need to produce at the construction site can also be mass-produced in the factory according to standard parts, with the use of promotional value; cable can extend the life of the cable to be effective in preventing injury leakage and other external forces generated security incidents.

Stainless steel plastic coated metal hose has good flexibility

Stainless steel plastic coated metal hose has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile strength, water resistance and provides some electromagnetic shielding performance.
Stainless steel plastic coated metal hose can be freely bent into a variety of angles and radii of curvature in all Hydraulic tube fittings have the same softness and durability; sections side buckle with a certain tensile strength, soft plastic bag to prevent cause damage to the internal pipe laying hose lines exposed.
Stainless steel plastic coated metal hose, light weight, good flexibility and strength of the connection with accessories, electrical properties and oil resistance, flame retardant, splash water, etc., are widely used in electric power, chemical industry, metallurgy, light industry, machinery and other industries.

Metal pipe laying

Metal pipe laying :Dark metal tube set should meet the following requirements: embedded in the wall in the middle of the metal tube diameter should not exceed 50 floors in diameter preferably 15 ~ 20MM, 30 meters straight piping design dark box . Laid in concrete, cement inside Hydraulic ferrules metal tube, the foundation should be solid flat .Metal pipe connections, holes should be aligned , joints should be tight, can not penetrate the water and mud .Metal pipe should be not less than 0.1 % of the drainage slope .Buildings between the metal pipe laying depth of not less than 0.7 m ; laying on the sidewalk below , should not be less than 0.5 m .

Metal hose applications industry

 Metal hose applications industry 1, metallurgical industry, metal hose is gradually transition to competition from product performance competitive cost performance, product structure in shape, the metal hose industry applications has been widely recognized.2, the petrochemical industry, the situation is relatively complex, on the one hand, large-diameter high-pressure hose and tank drain hose central market demand is growing, and new product development in the field of domestic far failed to put in place. On the other hand, some other occasion hose has appeared the phenomenon of alternative products such as dock appearing on the market with a non-metallic conduit tube (light weight, pressure fit). As the petrochemical industry is now the largest domestic market hose, various competitive in this field, input cost of new product development in this area is also larger.3, railway locomotive industries.Hydraulic pipe fittings As used by the Ministry of Railways information required on the form of a composite hose made ​​stereotypes provisions will not be great changes in the product mix in recent years, mainly manifested as price and service competition. But in the long term, the use of complex conditions, the uncertainty of the composite hose damage from abroad perspective of the development of the industry hose, metal hose being replaced is inevitable, so the product development is still far from over.4, shipbuilding industry, product testing by the Society in addition to need, but no special technical performance requirements, but according to foreign domestic data, its market demand is also huge.5, civil construction, irrigation installation and other industries, in addition to some of the stereotypes of the hose outside (such as plumbing, etc.), thick-walled tube instead of the trend of domestic elbow yet developed, according to Japanese data show that as much as their domestic water heater application prospects hose market.

Metal hose pavement construction requirements

Metal hose construction, the use of sub-construction method, previously used in the original arch culvert base angle side by side two, the length determined based on long culvert. Culvert advance for the rails, corrugated culvert pipe diameter according to project needs may have different specifications, ready to pipe diameter of 0.5m - 2.5m; each section of pipe length 3 meters. Using internal (external) flange bolts. Assembled pipe diameter of 3m - 8m. Each circumferential direction 4 --- 15 plates, lap board and the board strength bolts tightened. If Han longer than 30 meters, the corrugated culvert culvert sides of the original width of less than 80cm, length 3m-6m may be downstream or upstream culvert advance toward the one end, in place later, it can be fixed to the top of the sheet rock masonry end wall, the other end of the corrugated culvert culvert with sandbags or the distance between the mortar and stone block, width 50cm, then start filling. Both sides of the law can be dense or coarse watertight concrete pouring Vibes tamping; top with high-pressure pumping expansive cement mortar. This section tube four weeks after they have finished filling the second pipe shipped to carry two connections, corrugated culvert pipe are connected to the inner flange bolting, workers in the pipe connection. After connecting to the same method as backfill. In this order, to complete the construction of the entire road corrugated culvert work. Metal hose adapter, according to the selection of electrical equipment into the cable connector metal hoses and metal hose fittings, metal Hydraulic hose fittings according to the size of the transition metal hose connector panel mounted connector and metal hose, so that the whole system is naturally smooth; transition joints can either press the need to produce at the construction site can also be mass-produced in the factory according to standard parts, with the use of promotional value; cable can extend the life of the cable to be effective in preventing injury leakage and other external forces generated security incidents.