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

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 larger 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 hydraulic tube fittings nut, but also eliminate the pipeline force. For flared 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.Hydraulic tube fittings in the hydraulic system, the connecting member and the pressure tubing hydraulic tube fittings  tubing between. 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.Hydraulic tube fittings can not be used to replace ordinary dedicated connector, because the hydraulic are can withstand a lot of stress.

Metal hose fittings

The effect of Chinese metal hose stainless steel hydraulic hose couplings fittings Reuters is the first network sets of bellows coupling as a whole, together with a metal hydraulic hose adapters connector is metal hoses or other fittings, equipment coupled components. It normally guarantee media jobs in the pipeline system. Information joints usually bellows, network data sets, as much stainless steel main. When production costs decline, some larger diameter metal hose is not strong in transporting corrosive or non-corrosive media, carbon steel fittings are available; corrosive media work on metal hose connector case, if depicted the adoption of appropriate measures to avoid touching the medium, it is possible to manufacture carbon steel. Layout joints generally divided into spiral, flanged and fast three categories: 1, thread type: diameter 50
The effect of stainless steel metal hose connector is first the mesh sleeve and the bellows coupling as a whole, together with a metal hose connector is metal hoses or other fittings, equipment coupled components. It normally guarantee media jobs in the pipeline system. Information joints usually bellows, network data sets, as much stainless steel main.  When production costs decline, some larger diameter metal hose is not strong in transporting corrosive or non-corrosive media, carbon steel fittings are available; corrosive media work on metal hose connector case, if depicted the adoption of appropriate measures to avoid touching the medium, it is possible to manufacture carbon steel.Layout joints generally divided into spiral, flanged and fast three categories:
1, thread type: 50 mm diameter metal hose fittings, in the case of accepting a higher operating pressure, and many more screw-type main thread when tightening the future, within the two connectors on the outer taper surface work closely to complete the seal. Cone angle is usually 60 degrees, 74 degrees is also useful. The layout of the tightness, but it is necessary to guarantee the concentricity of the two pieces when docking device. To deal with the practice of engineering often see repeat demolition, installation and easy concentric and other issues, can be portrayed as the joint cooperation of the cone with the ball.
2, flanged: diameter of 25 mm above the metal hose joints, usually in the case of acceptance operation pressure, to the main flange disc, which cooperate in the manner of tongue and groove seal. Along the radial direction, and we also can slide axially Looper flange bolt tightening tension in the two-body effects of convergence. The layout of the outstanding sealing function, but the process is difficult, simple sealing surface bumps. In special situations that require quick release, it is possible to tighten the bolt through the hole gash, made ??quick release flange.
3. Express type: Path for various metal hose fittings 100 mm or less, and at the request of the use of rapid loading and unloading conditions, usually selected type fast. It is commonly used plastic or special fluorine rubber O-ring seal. When moving the handle must viewpoint future, the equivalent of fingers long thread is locked; O-ring will be kept more tightly, sealing function better. The layout in the fire, field and other necessary quick quick release most suitable occasion. Within a few seconds, with no need to use any special tools, it is possible to open a group or butt joints.

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.

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.

Welded pipe joints for oil pipeline system for the medium

Welded pipe joints Uses and characteristics junction 1 . Welded pipe joints Uses: Welded pipe joints for oil as the medium of piping systems, piping systems for water and air pressure are also used . Working pressure of less than or equal 32Mpa.2. Hydraulic pipe fittings : welded pipe joints has a simple structure , easy to manufacture , sealing , etc., but when installing large welding , welding quality requirements .3 . welded pipe joints structure: welded pipe joints which consists of fitting body nuts and takeover components. took over the joint between the body and the O- ring seal when screwed into the body when the connector body , metric fine thread and cone pattern. and the use of combined sealing gaskets. takeover pipes and piping systems welding hydraulic fittings manufacturing standards 1 , for fluid power and general use metal fittings O-ring hydraulic tube fittings 2 plane , cone seal welded straight couplings 3 , cone seal welded through 55 ° non- sealed tube threaded pipe joint 4 , cone seal welded through 55 ° sealing pipe thread fittings 5 , cone seal welded through 60 ° sealing pipe thread fittings 6 , 90 ° cone seal welded elbow

Raw materials for metal hose metal hose production enterprises is crucial

Raw materials for metal hose metal hose production enterprises is crucial is to ensure product quality metal hose basis . However, with the metal hose increasingly fierce competition in the market , there are always some mercenary manufacturers or unscrupulous traders ,Hydraulic adapters will shoddy products to market , even if some of the regular manufacturers , due to their own loopholes in management or other reasons, may also make Some low-quality products into the market. These inferior products used in the production process, constitute a significant quality or safety problems, has become the product quality accidents or safety incidents culprit. In addition, the procurement of raw materials back if not properly controlled , but also directly affect the quality of products . How to prevent shoddy or deterioration of raw materials into the production line, every business needs to study. Experts believe that the metal hose business enterprise to control the quality of raw materials procurement , to ensure product quality and safety , from the raw material supplier evaluation, selection , strengthen inspection before storage of raw materials , improve storage management to control quality and other aspects .

Stainless steel mesh cover is a metal braided hoses installed in the pressure line of the main pressure parts

Metal hose connectors at both ends : Connector includes threaded connection, flange connection, quick connector , metal hose three main functions : to reduce the stress of the pipe installation , compensating pipe nominal position to absorb the vibration of piping system .Stainless steel mesh cover is a metal Hydraulic hose fittings braided hoses installed in the pressure line of the main pressure parts , while the protective effect of the metal hose , the pressure in the pipe size and locations , you can select one or more layers of stainless steel wire or steel band performed according to certain parameters is woven to form a high pressure metal hose, I produced the metal braided hose pressure range usually ask PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh nets are set with steel nets two types.

Plastic coated metal hose Major parts of the austenitic stainless steel

Plastic coated metal hose Major parts of the austenitic stainless steel , thus ensuring a plastic coated metal hose excellent heat resistance and corrosion resistance, plastic coated metal hose operating temperature range greatly , as -196-600 ℃, in actual use , according to corrosive media channels to select the appropriate grade of stainless steel , plastic coated metal hose to ensure corrosion resistanceAnnular corrugated plastic coated metal hose was closed annular tubular housing by the ring Hydraulic pipe fittings between waves and wave ripples in series. Annular plastic coated metal hose made seamless pipe or welded pipe forming process . Constrained by the processing methods , compared with spiral corrugated pipe, its single- tube length is usually shorter . Plastic coated metal hose is made of very thin-walled stainless steel seamless or welded congregation plastic coated metal hose through high-precision plastic processing forming . As plastic coated metal tube determines the elastic properties of the silhouette hose has good flexibility and fatigue resistance , making it very easy to absorb deformation of the cyclic loading a variety of sports , particularly in the piping system has the ability to compensate for a large amount of displacement .

Stainless steel fittings fittings sealing principle

Stainless steel fittings ferrule tube fitting the basic structure of the body made ​​of stainless steel fittings , card sets, compression nut composed of three basic parts ( Fig. 1 >, where stainless steel fittings ferrules are key parts .
Stainless steel fittings ferrule is a hill -side with the inner edge of the metal ring , it has good rigidity , hardness and toughness. Stainless steel Hydraulic tube fittings ferrule surface hardness is generally 5 to 63 , hard layer depth of 05 and II, the hardness of the substrate between 9891 ~ 96 . Stainless steel fittings card sets in the assembly process, when tighten the compression nut , stainless steel fittings ferrule axial force, pushed the connector body 24 " tapered bore , the card sets in the radial direction under the action of radial force contraction, so that the inner sleeve and the outer tube cut edge an annular groove is formed , as shown in Figure 2, segment 0 of the annular groove depth of about 3 to 0,501,111 , formed stainless steel ferrule and the pipe joint between the outer wall seal; Meanwhile , the card connector body Gunn outer wall 24 . tapered hole is completely tightly bonded together to form a sleeve between the joint body tapered bore sealing tape . 6 above in Figure 2 . " , 6 two a sealing tape to complete the sealing of a tube . From stainless steel Hydraulic pipe fittings ferrule tube fitting sealing principle can be seen, stainless steel fittings ferrule manufacturing quality is good or bad in itself as well as sealing tape ", 6 are in good form is related to the pipe stainless steel fittings for leaks of the key issues .

Suddenly leaking pipe joints how to do

In the hydraulic system , both the metal pipe fitting , or hose fittings , there are prone to leakage problems . Hydraulic tube 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. For flared Hydraulic hose 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, available on the cone abrasive grit grinding  In some with "о" or outer -ring face seal by the occasion , the leakage following reasons : "о" ring aging or deformation caused by leakage ; "о" ring assembly is not in place , so that the two plane connection when pressure is uneven or "о" ring being cut cause leakage ; "о" rings uncompacted , elastic deformation caused by insufficient leakage ; "о" spigot ring groove too deep and cause leaks. In this regard , the need to re-select the same diameter and cross-sectional thick "о" rings can also be sealed with a rabbet plane for cutting grooves or grinding to reduce the rabbet groove depth , so that "о" rings are flexible enough to deformation ( compression should generally be between 0.35-0.65mm ) . For the use of oil and rubber, wool felt, soft steel cardboard, combined sealing gasket or sealant leaking pipe joints , whether any material , you should first check the seals for damage , deformation, aging and rough through the large , etc. and then take the appropriate measures.

Hydraulic fittings Progentech elaborate hydraulic system of hydraulic fittings

Pressure pipe 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. The hydraulic system of hydraulic pipe fittings are generally closed loop piping system, hydraulic 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 transmission, hydraulic fittings components and the basic principles of structural knowledge loop failure analysis.

Metal hose is an important engineering technology connecting member

Metal hose is an important engineering technology connecting member by corrugated flexible tube, a combination of nets Hydraulic hose fittings. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, medical health, textile electronics, energy and construction fields.Austenitic stainless steel metal hose material or materials required by the user, with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance (up to 32MPa), the tube path can be connected in any direction, for temperature compensation, and absorb vibration and reduce noise, change the medium conveying direction, remove pipe or between pipes and the mechanical displacement devices, double flange metal corrugated hose to a displacement, vibration a variety of pumps, valves and other flexible joints is particularly applicable.

Pressure metal hose cracking analysis

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 position is formed when the welding weld cracking; second crest of microcracks in Hydraulic pipe fittings 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.

The advantage of the metal hose

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 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 Jic hydraulic 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.

Proper use of rotary joints

1 down time more than 72 hours before rebooting ring and graphite rings at the junction of the sealing surface surrounding drip lubricant (to prevent damage to two bonded graphite ring). Do not use the machine for a long time can cause rust damage to the rotary joint seals, such as the re-use will be stuck or spill things from happening.2 swivel hose connection must use the entrance, and a sufficient length.3 should be kept inside the piping and rollers clean, new machines often dirty due Hydraulic adapters caused by the rotary joint abnormalities.4 swivel rotary and fixed inner tube threaded points left and right. Clockwise rotation of the roller, with left hand thread rotary joint, whereas the same. Rotary joint rotary axis of right-hand thread, the thread is fixed to the inner tube D, on the contrary the same.5 rotary joint in the handling and installation process, should avoid the collision, no percussion, otherwise easily lead to damage to internal parts.6 In the absence of media into state, should avoid prolonged operation.7 rotary joint work should be in a suspended state.

Metal hose three roles

Metal hose three roles: to reduce piping installation stress, compensating pipe nominal position to absorb the vibration of piping system.1, size hose DN, the choice of the type of connector (mainly flanged, threaded connection, quick connector) and the size of the metal hose, hose lengths. 2, the pressure under actual working pressure hose, corrugated metal hose and then query the nominal diameter and pressure gauges, decide whether to use stainless steel mesh cover types of metal hose. 3, medium hose in the chemical properties of the transmission medium, according Hydraulic tube fittings corrosion resistance of the hose material parameter table, determines the hose material of the parts. 4, the temperature inside the hose and medium operating temperature range; hose when working ambient temperature. High temperatures, the metal hose shall work under high pressure and temperature correction coefficient to determine the temperature corrected pressure to determine the selection of the correct pressure rating. 5, the state is used by the state of the hose, metal hose with reference to the proper use and installation methods and hose compensation in settlement of optimum length. The length of the hose variety of sports state calculation and the minimum number of bends hose and minimum bend radius and other factors, parameters select the correct hose length, and correctly installed.

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 hose and pipe 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.Hydraulic adapters 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.

Special features of the metal hose

Metal hose is an important engineering technology connecting member by corrugated flexible tube, a combination of nets and Hydraulic tube fittings. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, medical health, textile electronics, energy and construction fields. Austenitic stainless steel metal hose material or materials required by the user, with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance (up to 32MPa), the tube path can be connected in any direction, for temperature compensation, and absorb vibration and reduce noise, change the medium conveying direction, remove pipe or between pipes and the mechanical displacement devices, double flange metal corrugated hose to a displacement, vibration a variety of pumps, valves and other flexible joints is particularly applicable.Hose metal hose is installed in the pressure line of the 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 for 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 Hydraulic hose fittings 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.

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 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 Hydraulic tube fitting, 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.