DKJ connector

DKJ connector layout and characteristics: DKJ card type of flexible metal hydraulic hose adapters, steel and hose connections will be no threads, save the threading process, only the screw is screwed into the can; metal joint is made of zinc alloy material by die casting, surface galvanized, frosted, or chrome plated; layout tight, high strength. Reliable, connection pipe and the metal hydraulic hose assemblies surface is beautiful; the metal joint for sleeve type, stainless steel metal hose to the metal hose connection on the steel pipe is threaded metal hose; adaptation: JS type, JSH type, JSB type, JSHG type; adapting pipe: a thin steel wire tube, black and galvanized iron pipe (water, gas pipe); use DKJ card type metal joint note standard, scale steel hose connection.

The existence of stainless steel metal hose industry problems

1 the cost of rising prices. Iron and steel as the main raw material of stainless steel metal hydraulic hose adapters production has entered the price open and transparent small profits era, rising steel prices will push the stainless steel metal hose production cost;
The brand is poor in China 2 stainless steel metal hose connector industry, international competitiveness is weak. As a result of industrial concentration is low, backward technology, low price competition can not be avoided, China stainless steel metal hose is such a huge market has no real sense of "famous brand on the international";
3 fierce competition constantly eliminated a small stainless steel metal hose enterprise.
4 R & D strength is weak, insufficient capital investment. The technology progress of our country still stays in the overseas in twentieth Century 80 time, although it is a large number of the introduction of advanced technology and production lines, but the basic support for the technology digestion and absorption of the lack of hardware and software.
5 practical technology brain drain. At present, although China has engaged in research work in some colleges and universities, a lot of ethical research, patent papers have a very high level, but combined with production practice is not close, the theory into the finished product ability is poor.

Hydraulic tube fittings can not be used to replace ordinary dedicated connector

Hydraulic tube fittings in the hydraulic system, the connecting member and the pressure tubing pressure tubing between. Hydraulic tube fittings can not be used to replace ordinary dedicated connector, because the hydraulic are can withstand a lot of stress. In the hydraulic system, either a metal hydraulic tube fittings, hoses or fittings, are prone to leakage problems. For card sets of pipe joints, mostly due to the pipeline by a hydraulic tube fittings  force or impact, so that the card sleeve loose or pipe end surface deformation caused by leaks, you should check whether the card sets out of round, edge or without defects, whether the pipe ends in good condition and the extent of compression ferrule nut, but also eliminate the pipeline force. For Hydraulic tube fittings tube hydraulic tube fittings, mostly due to excessive flaring, substandard quality requirements or repeatedly demolished, resulting in flaring deformation or cracks caused by leaks, then you can be re-flared front amputated. If you use a male and female cone top pressure seal, which is mostly due to the two cone leak damage, is available on the cone grinders for grinding. For use oil sheet, wool felt, soft steel board, combination gasket sealant joints or pipe leaks, no matter what the material is, you should first check the seals for damage, deformation, aging and rough through the large, etc. and then take the appropriate measures.

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.

Card sets of pipe joints without welding process

Card sets of pipe joints have a solid connection , pressure capacity, high temperature resistance, good sealing and repeated installation and maintenance easy, safe and reliable. Card sets hydraulic ferrule joints pipe working principle is to insert the card kit, using the ferrule nut , inconsistent card sets, cut hydraulic adapters and seal. It is connected with hydraulic adapter without welding , is conducive to fire, explosion , and high-altitude operations , and can eliminate the evils of welding accidentally . So it is refining, chemical , oil, gas , food, pharmaceutical , instrumentation, piping and other systems controlled device in a more advanced connections . For oil, gas , water, etc. piping connections .

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.

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, all electrolytic tending my factory, casting machines and tipping hybrid furnace and other key equipment are used the hydraulic system. Hydraulic adapters system of hydraulic pipe fittings are generally closed loop piping system, hydraulic hose fitting system failure is difficult to locate hidden main disadvantages of hydraulic drive.Equipment failure of the hydraulic adapter 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 transmission, hydraulic fittings components and the basic principles of structural failure analysis circuit knowledge

Metal hose used for automated meter signal wire protection tube and instrument protection tube

Metal hose used for automated meter signal wire protection tube and instrument protection tube. Instrument for the protection circuit, protecting precision optical ruler to protect the sensing lines threading stainless steel hose, metal hose electrical protection; stainless Hydraulic hose fittings, good softness, dustproof, waterproof, anti-oil, anti-rust; abrasion resistance, and provide some shielding effect. The sensing for precision optical ruler line protection, industrial sensor circuit protection. Has good flexibility, corrosion resistance, high temperature resistance, abrasion resistance, tensile strength.

Metal soft metal hose construction, construction methods using segmented pipe

Metal soft metal hose construction, construction methods using segmented pipe construction , the use of segmented construction methods , in advance of the original arch culvert base with 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 . Hydraulic tube fittings , according to the selection of electrical equipment into the cable connector metal hoses and Hydraulic pipe 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.

Metal hose Application Performance

Closed metal hose has high acid and alkali, high temperature, flexible bend freely and specifications are complete , easy to install , maintenance free, long life characteristics . Applicable to any environment , various types of metal cutting machinery and equipment are applicable . Corrugated metal pipe 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 , Hydraulic hose fittings outer sleeve made ​​of stainless steel wire mesh or stainless steel woven according to certain parameters . Hose connectors at both ends of piping or equipment in accordance with the user 's joint form prepared . Corrugated metal hose 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. Gas stove with gas vent pipe connections , use that is resistant to corrosion, oxidation of the metal hose . Metal hose with threaded connection as long as the stove is connected , you can use the seal will not install due to human causes leaks , and ease of installation .

Stainless steel pipes instead of water supply pipeline has become the trend of other materials

As more and more high buildings , high-rise buildings in the drinking water and fire water delivery systems have special requirements , the system must not only be able to withstand high pressure but also caused by the earthquake and the building of wind movement . Engineers are with stainless steel piping system meets these requirements . The world's newest and tallest 3 buildings ( China Taiwan Province, Taipei Financial Center , Brisbane, Australia Oro Plata Building and Kuala Lumpur Petronas Twin Towers ) is the best illustration of this to the high pressure stainless steel pipe the system changes.In the past 25 years the German drinking water extraction, Hydraulic hose fittings and distribution systems made ​​of stainless steel has been growing widely recognized. Stainless steel tube is not only smooth luxury , look as new, and is widely recognized as a leading environmental health water supply pipes. The strength of austenitic stainless steel pipe carbon steel pipe 2 times , 4 times brass , PPR plastic pipe 8 times , is truly safe and Hydraulic ferrules and can be done with the building with life green pipe. Another major use of stainless steel piping is - the life cycle cost of stainless steel components has obvious advantages , because the long-term infrastructure such as drinking water means the use of a stainless steel , you rarely need to be replaced .Although stainless steel drinking water systems in the world, the universal application will take some time , but in the engineering and economic aspects of stainless steel has the advantage over other alternative materials have shown that : instead of other materials with stainless steel pipe water pipe has become a trend .

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 .

Metal hose is an essential component of modern pipeline

Metal hose because it has a good seal, pressure resistance, high temperature resistance, corrosion resistance, and certain other properties available around the song has become an essential component of modern pipeline. Metal hose can be used for chemical piping systems superheated vapor tube, Hydraulic ferrules and pneumatic equipment, high-pressure pipeline, the transmission medium, pipes and other drug burst, the role is to absorb the reciprocating movement, absorb thermal expansion, vibration absorption, compensation pipe installation deviation. Because metal hose complicated forces at work, poor working conditions, so the accurate representation of the force metal hose there are considerable difficulties. Largely by the bellows metal hose, and fittings nets three parts. Corrugated metal hose pipe is the subject of the role played around; nets from enhanced shielding effect; joint plays a role in the connection.

Metal hose reel machine nonmetal parts cleaning method

Metal hose reel machine nonmetal parts cleaning method - in metal hose machine with metal parts , there are also non-metallic parts, metal hose machine maintenance , it is necessary for some spare parts for cleaning. Clean metal parts , generally diesel , petrol or cleaning agents. However, in cleaning metallic parts, can not be used diesel oil, gasoline and the like for cleaning it. Otherwise, it will make some non-metallic parts deformation , deterioration or failure . Therefore, the non-metallic parts should be based on different materials , use of different Hydraulic pipe fittings.1 , is to clean friction plate, such as the clutch friction plate, brake linings , etc., can only use petrol to clean.2, which is made ​​of rubber parts cleaning , such as rubber sheet , aprons , etc., should be cleaned with alcohol or brake fluid .3 , is to clean paper parts, can not be washed with water in the diesel fuel to clean.4 , is made ​​of parts cleaning foam should use detergent or soap and water.5 , is to clean leather accessories, such as drive belts , etc., they can be washed or wiped clean with a cloth

Metal hose selection

For a given length and specifications of metal hoses, their ability to withstand stress and shock have certain limits, therefore, when used according to the actual situation. Generally used nominal diameter Hydraulic hose fittings the same nominal diameter, hose length array according to Shen tank temperature deformation, misalignment and earthquakes and other factors to determine the lateral displacement produced. The metal bellows tube, nets of three parts and connectors, bellows are made ​​of stainless steel, has a good flexibility, its longitudinal rigidity and bending rigidity is small, within a radius of curvature at the rated working, with a strong corrosion resistance and good temperature stability. Nets from strengthening the role of the metal hose has a large carrying capacity. Therefore, the metal hose with shock, subjected to bending, absorb stress.

Resistant metal hose

Resistant metal hose coal injection system in ironmaking, steelmaking refining furnace and other solid materials to ease the occasion, with ordinary metal hose soon frayed, Huasheng pipe fittings manufactured using wear resistant stainless steel corrugated hose advanced technology from developed, proved through practice, high-speed flow in the pipe body particle abrasion, long service life.
Wear-resistant metal Hydraulic hose fittings body using multi-layer composite structure, followed by heat from outside to inside layer of asbestos cloth, wire mesh layer, a metal layer and a trapezoidal cross-section bellows wound metal hose layer. Its layers and hoop ends welded together tight combinations, hose quick connector used between the body. The metal hose better solution because partial burning of the surface and the inner tube wear two major problems affecting the service life of metal hose, metal hose and compared to similar existing product life greatly improved, the relative cost of production significantly reduced iron plant particularly suitable application technique used in pulverized coal injection.

Corrugated metal hose is a modern industrial pipeline a high quality flexible pipe

Corrugated metal hose ( short hose ) is a modern industrial pipeline a high quality flexible pipe . It mainly consists of bellows, nets and joint components. Its inner tube is a spiral or annular waveform walled stainless steel bellows , bellows outer nets, is made of stainless steel wire or woven according to certain parameters . Hose Hydraulic tube fittings or flanges at both ends of the pipe joints with customers or flange mating .Bellows hose is made of very thin-walled stainless steel seamless or longitudinal weld precision plastic processing after forming . Because the elastic property of the bellows determine the contour hose has good flexibility and fatigue resistance , making it very easy to absorb deformation and cyclic loading various sports , especially in the piping system has the ability to compensate for a large amount of displacement . I plant in addition to the original hose sophisticated production equipment, recently introduced from Japan two high-precision , high-tech molded bellows automatic welding production lines, greatly improved the quality of the hose and the hose length is not produced limits , to meet the needs of long hose . Dawn brand hose nominal diameter range of DN4-800mm, length optional. Nets are installed in the pressure line hose main pressure parts , while the bellows from the sheath effect, according to the size of pipeline pressure and locations , you can select one or more layers of stainless steel wire or steel strip weaving, dawn brand hose pressure range is generally PN0.6-32.0Mpa. Up to 42.0MPa. The production of the main part of the material hose is the use of austenitic stainless steel , thus ensuring the hose excellent in heat resistance and corrosion resistance of the hose very wide temperature range , is -196-600 degrees to hose by pipelines through the media choose to apply corrosive stainless steel grades, the corrosion resistance of the hose can be guaranteed . Corrugated metal hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance , and many other features, it is relative to other hoses ( rubber, plastic hose ) much higher lifetime would therefore it also has a high overall economic efficiency . With the development of modern industry , for high temperature, high pressure hose corrugated metal demand is also getting bigger . Hose Scope: need fully flexible pipes, to prevent vibration premises piping for steam, gas , air, heavy oil, petroleum, chemical -pharmaceutical etc apply.