This SAE Standard provides general, dimensional and performance specifications for the most common hoses used in hydraulic systems on mobile and stationary equipment. The rated working pressure of a hose assembly comprising SAE J hose and hose fitting end connections per SAE. The maximum working pressure of a hose assembly comprising SAE J hose and hose connectors per SAE J, SAE J, SAE J, etc., shall not exceed the lower of the respective SAE maximum working pressure values. When using SAE J hose for marine applications, see SAE J SAE J Hydraulic Hose - Commonwealth Drive, Warrendale, to investigate the possibility of applying the most recent edition of the document .. - 8- SAE J Revised APR TABLE 3—DIMENSIONS AND.
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Hydraulic Hoses Standards - Free download as PDF File .pdf), Text File .txt) or read online for free. SAE Specifications for Hydraulic Hoses. SAE HYDRAULIC HOSE SPECIFICATIONS (SAE J). General. Hydraulic hose has a finite service life, which can be reduced by many factors including. SAE J standard high pressure hose pipe with stainless Committee: AE-1 Engine SAE MOBILUS Subscribers can view annotate, and download all of SAE's.
Then, while still at the specified temperature, the samples shall be evenly and uniformly bent once over a mandrel having a diameter equal to twice the specified minimum bend radius. Bending shall be accomplished within a period of not less than 8 s nor more than 12 s.
In the case of hose sizes up to and including 22 mm nominal inside diameter, bend them through degrees over the mandrel; in the case of hose sizes larger than 22 mm nominal inside diameter, bend them through 90 degrees over the mandrel.
After bending, allow the sample to warm to room temperature, visually examine it for cover cracks and subject it to the proof test. There shall be no cover cracks or leakage.
In lieu of the bending test, hoses larger than 22 mm nominal inside diameter may be considered acceptable if samples of tube and cover pass the Low Temperature Test on Tube and Cover of ASTM D Reject any samples with visible cracks or leakage. High pressure, which covers pressures higher than 3 MPa 2.
Low pressure, which covers 1. Where the individual standard requires, also test aged hose assemblies. Calculate the free exposed length of hose und er test, shown on Figure 1, as follows: a. Hose sizes up to and including 22 mm nominal inside diameter see Equation 2 : degrees bend free length b. The test pieces shall be installed according to Figure 1. Test pieces of hose of nominal inside diameter up to and including 22 mm shall be bent through degrees and hoses of nominal inside diameter larger than 22 mm shall be bent through 90 degrees.
Other fluids may be used as agreed upon between the customer and the manufacturer. Test the hose at the impulse test pressure indicated in the individual specification. Apply a pulsating pressure internally to the hose assemblies at a rate described in the category chosen and record the frequency used. The pressure cycle shall fall within the shaded area of either Figure 2 or Figure 3, depending upon the test category and conform as closely as possible to the curve shown.
NOTE 4: Cycle rate shall be uniform at 0. NOTE 2: The pressure rise rate shall be contained within the wave form envelope. Where aged samples are required, refer to the individual standards. It is recommended the test fluid be changed frequently to prevent breakdown.
Assemblies, which have been subjected to this test, shall be destroyed. Reduce the fluid pressure to 0 MPa. For example, specialty hose might be used in applications such as conveying refrigerant, environmentally friendly hydraulic fluids, or LPG gas, operating at extremely high or low temperature, or requiring electrical nonconductivity.
They may be specified where weight is a concern or long continuous lengths are required. Reinforcement is generally nonmetallic — usually a rubber-impregnated fabric. SAE hose constructions To bring a measure of uniformity to hydraulic-hose manufacturing, minimum standards for construction, dimensions, and performance have long been established in North America by SAE.
Governmental agencies also set standards. SAE Standard J provides general, dimensional, and performance specs for the R hose series, which are the most common hoses used in hydraulic systems. Type AT has the same construction as Type A, except the cover does not need to be removed to assemble with fittings. SAE R2 hose has two braids of steel-wire reinforcement. Type A requires skiving removing a portion of the cover to assemble with fittings.
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SAE R3 hose has two braids of textile yarn. It is generally used in low-pressure applications with petroleum oils, antifreeze, or water. SAE R4 hose has one or more plies of woven or braided textile fibers with a spiral of body wire.
SAE R5 hose is reinforced with two textile braids separated by a high-tensile-strength steel-wire braid. All of the braids are impregnated with an oil and mildew-resistant synthetic rubber compound. SAE R6 hose includes one braided or spiral ply of textile yarn. It consists of a thermoplastic inner tube resistant to hydraulic fluids with synthetic-fiber reinforcement and a hydraulic fluid and weather-resistant thermoplastic cover.
Nonconductive R7 is identified with an orange cover and appropriate layline. Pressure capacity is similar to that of R1. It has a thermoplastic inner tube resistant to hydraulic fluids, synthetic-fiber reinforcement, and a hydraulic fluid and weather-resistant thermoplastic cover. Nonconductive R8 is identified with an orange cover and appropriate layline.
Pressure capacity is similar to that of R2. SAE R9. This hose type has been removed from the SAE standard. SAE R It has four spiral plies of heavy wire wrapped in alternating directions.
Multiple spiral plies of heavy wire wrapped in alternating directions cover the inner tube. Type A consists of an inner tube of polytetrafluorethylene PTFE reinforced with a single braid of stainless steel.
Type B has the same construction as Type A, but with the additional feature of an electrically conductive inner surface to prevent buildup of electrostatic charge. It has multiple spiral plies of heavy wire wrapped in alternating directions. SAE R16 hose has one or two braids of steel-wire reinforcement.
SAE R17 hose, with one or two braids of steel-wire reinforcement, has a constant working pressure rating of 3, psi. It has a thermoplastic inner tube that resists hydraulic fluids, synthetic-fiber reinforcement, and a hydraulic fluid and weather-resistant thermoplastic cover. Nonconductive R18 is identified with an orange cover and appropriate layline.
Working pressure rating is 3, psi for all sizes. SAE R19 hose has a constant working pressure rating of 4, psi in all sizes. It has one or two braids of steel-wire reinforcement. Exceeding SAE specs Some manufacturers have developed hoses that far exceed the performance and construction requirements of SAE specifications.
Benefits to users include higher pressure and temperature capabilities, greater flexibility, and a bend radius as little as one-half that of the SAE standard.Consider reasonable and feasible means, including those described in this section, to reduce the risk of injuries or property damage. A high cycle rating equates to longer service life and makes the hose suited for out-of-sight and hard-to-reach applications such as boom arms and scissor lifts on mobile and construction equipment.
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Consider careful routing, adjacent components, warnings, guards, shields and training programs. Specialty hydraulic hoses do not fit well into a particular pressure category. Type AT has the same construction as Type A, except the cover does not need to be removed to assemble with fittings. The difference in length changes could wear the hose covers.
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