This standard specifies the technical requirements and test methods for steel wire reinforced hydraulic rubber hoses with an inner diameter of 5~51mm. This standard is applicable to steel wire reinforced hydraulic rubber hoses that use common hydraulic fluids (such as mineral oil, soluble oil, oil-water emulsion, ethylene glycol aqueous solution and water, etc.) and have an operating temperature range of -40`C to 100`C. This standard is not applicable to sesame oil-based and ester-based liquids. This standard does not include requirements for end pipe joints, but only specifies the performance of hoses and hose combinations. GBT 3683-1992 Steel wire reinforced hydraulic rubber hoses and hose assemblies GBT3683-1992 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Rubber hoses and hose assemblies-wirerelnforced hydraulic type
GB/T 3683-92
Replaces GB3683-83
This standard refers to and adopts the international standard ISO/DIS1436-1985 "Wire Reinforced Hydraulic Rubber Hose and Hose Assemblies". 1 Subject content and applicable scope
This standard specifies the technical requirements and test methods for wire reinforced hydraulic rubber hoses with an inner diameter of 5~51mm. This standard is applicable to wire reinforced hydraulic rubber hoses that use common hydraulic fluids (such as mineral oil, soluble oil, oil-water emulsion, ethylene glycol aqueous solution and water, etc.) and have an operating temperature range of -40℃ to 100℃. This standard is not applicable to sesame oil-based and ester-based liquids. This standard does not include requirements for end pipe joints and only specifies the performance of hoses and hose assemblies. 2·Referenced standards
GB/T 1690
GB/T 5562
GB/T 5563
GB/T 5564
GB/T 5568
GB/T 9571
GB/T 9573
Test method for liquid resistance of vulcanized rubber
Physical test method for rubber layer of hose
Hydraulic test method for hose
Low-temperature bending test method for hose
Pulse test method for high-pressure hose
Evaluation of ozone resistance of rubber and plastic hoses under static conditionsMethod for measuring dimensions of rubber, plastic hoses and hose assembliesGB9574Ratio of test pressure, burst pressure and design working pressure of rubber, plastic hoses and hose assembliesGB/T 9575
Inner diameter dimensions and length tolerances of rubber and plastic hoses GB/T 9576
Guidelines for storage, selection, use and maintenance of rubber and plastic hoses GB/T9577 Rules for marking, packaging and transportation of rubber and plastic hoses 3 Product classification
3-1 Model
Type 1: hydraulic rubber hose with one layer of steel wire braiding; Type 2: hydraulic rubber hose with two layers of steel wire braiding; Type 3: hydraulic rubber hose with two layers of steel wire winding and one layer of steel wire braiding. Type 1T: The hose reinforcement layer structure is the same as that of Type 1, and the outer rubber layer is not cut off or partially cut off when assembling the pipe joint; Type 2T: The hose reinforcement layer structure is the same as that of Type 2, and the outer rubber layer is not cut off or partially cut off when assembling the pipe joint. Type 3T: The hose reinforcement layer structure is the same as that of Type 3, and the outer rubber layer is not cut off or partially cut off when assembling the pipe joint. 3.2 Structure
All types of hoses are made of liquid-resistant synthetic rubber inner layer, one or more steel wire reinforcement layers and synthetic rubber with excellent weather resistance. Approved by the State Technical Supervision Bureau on December 12, 1992 and implemented on October 1, 1993
GBT 368-92
Free and finished products Dunguan Foreign Economic Research Institute
368392
Wuyishen
3.4 ​​Concentricity
GB/T3683-92
Measure the wall thickness at different parts of the same cross section, and its tolerance value shall not be greater than the values ​​listed in Table 2. Table 2
Nominal inner diameter
Less than 6.3 (including 6.3)
Less than 22 (including 22)
Greater than 22
3.5 Length and Tolerance
Difference in pipe wall thickness
3.5.1 The hose shall be supplied in the length specified by the buyer. The hose length tolerance is ±1% or ±3m, whichever is greater. 3.5-2 If the user has no special requirements, the percentages of different hose lengths at the time of delivery are as follows: hoses above 13m shall not be less than 65%
hoses between 7.5 and 13m shall not be more than 35%;
hoses between 1 and 7.5m shall not be more than 10%;
hose length shall not be less than 1m.
3.6 Product marking
Marking content: name, model, specification, standard number. Marking example:
steel wire hydraulic hose
4 Technical requirements
The design working pressure of the hose shall meet the requirements of Table 3. Inner diameter
Design working pressure, MPa
I, IT type
GB/T 3683
Standard number
-Model
2.3 type.2T.3T
Design working pressure, MPa
2,3 type,2T,3T type
4. 2·The ratio of the test pressure and minimum bursting pressure of the hose to the design working pressure shall comply with the requirements of type 3 in GB 9574. As shown in Table 4.
Hose model
IT, 2T.3T type
GB/T 3683--92
Ratio of test pressure to design working pressure
Ratio of minimum bursting pressure to design working pressure4.0
4.3 The hose shall work under the condition of being greater than (or equal to) the minimum bending radius specified in Table 5 and less than (or equal to) the design working pressure.
Minimum bending radius
4.4 The change in length of the hose under the design working pressure shall not exceed <土))%
4.5 The impulse test of the hose and hose assembly shall comply with the requirements of Table 6. Table 6
Hose modelbzxz.net
2T, 3T type
25 (inclusive) or less
31.5 (inclusive) or less
Test pressure and design
Working pressure ratio
Test temperature
Minimum bending radius
Number of pulses
15 000
200 000
During the test, those with an inner diameter less than and including 22 mm should be bent 180°. Those with an inner diameter greater than 22 mm can be straight or bent 90°. The hose assembly should not have any leakage or other abnormal phenomena during the above test. 4.6 Other performance requirements of the hose shall comply with the requirements of Table 7. Low temperature bending performance
GB/T 3683-92
40±3 it
Pressure test after recovery to air temperature
Oil resistance (No. 3 oil, 100±2℃, 70±2h)) Volume change of inner and outer rubber layers, AV%
Adhesion strength, kN/m
Ozone resistance of inner rubber layer and reinforcement layer, outer rubber layer and reinforcement layer
(40±2℃.50±5pphm, 70±2h) Leakage test
Note: 1) Adhesion strength test is carried out for hoses above 16mm (including 16mm). Index
No crack
Magnify 2 times without
No crack
No leakage and damage
4.7 The hose is not allowed to have bubbles, cracks, sponges, delamination, exposed steel wire and other abnormal phenomena. If there are special requirements, the buyer and the manufacturer should negotiate and determine.
5 Test method
5.1 The size and concentricity of the hose are measured according to the G/T9573 method. 5.2 The pressure performance test of the hose is carried out in accordance with the provisions of GB/T5563. 5.3 The impulse performance test of the hose and hose assembly is carried out in accordance with the provisions of GB/T5568. During the impulse test, if the joint is pulled off or any damage occurs within 25mm of the adjacent joint, it should be regarded as damage caused by the joint. The hose can be discarded and re-sampled for testing. The form and location of the fault should be recorded. If the impulse test is stopped for more than 24 hours due to unavoidable reasons before the specified requirements are met, when the test is restarted, there may be slight fluid penetration at the joint connection. If this phenomenon disappears automatically within 30 minutes, it will not be considered as a test failure. 5.4 The leakage test of hose assemblies shall be carried out in accordance with the provisions of GB/T5563. During the test, two rubber hose joints that have been assembled for no more than 30 days and have not aged are subjected to a test pressure value equivalent to 70% of the minimum burst pressure value. The pressure is maintained for 5 to 5.5 minutes. The rubber hose should have no leakage or other signs of damage. This test can be regarded as a destructive test, and the sample is scrapped after the test. 5.5 The low-temperature bending test of the hose is carried out in accordance with GB/T5564. The hose with an inner diameter of less than 22 mm (including 22 mm) is bent 180° and the hose with an inner diameter of more than 25 mm (including 23 mm) is bent 90°. 5-.6 The liquid resistance test of the inner and outer rubber layers of the hose is carried out in accordance with the provisions of GB/T1690 and GB,5562. 5.7 The adhesion strength test between the layers of the hose shall be carried out in accordance with the provisions of GB/T5562. The adhesion strength test specimens of the inner rubber and the reinforcement layer shall be prepared in accordance with Figure 2 of GB/T5562. The peeling width is 5+*mm, and the adhesion test specimens of the outer rubber and the reinforcement layer shall be prepared in accordance with Figure 1 or Figure 3 of GB/T5562. 5.8 The ozone resistance test of hoses shall be carried out in accordance with the provisions of GB/T9571. 6 Inspection rules
GB/T3683-92
6.1 The hoses shall be inspected in batches by the inspection department of the manufacturer, and each rubber hose product must have a quality certificate before leaving the factory. 6.2 Hoses of the same model shall be divided into one batch, and the quantity of each batch shall not exceed 50,000m. 6.3 The appearance quality and specifications of the hoses shall be checked one by one. 6.4 The hydraulic performance test of the hose shall be carried out once for each batch. If there is less than one batch, it shall be inspected at least once a month. 6.5 For hoses of the same model, any one specification shall be selected for pulse and leakage tests, and an inspection must be carried out before they are shipped out. 6.6 The low-temperature bending performance of the hose must be inspected once before leaving the factory. 6.7 The ozone resistance of the hose must be inspected once before leaving the factory. 6.8 The liquid resistance of the hose shall be inspected once for each batch. 6.9 The interlayer adhesion strength of the hose must be inspected once before leaving the factory. If any of the above tests fail, double samples should be taken from the batch of hoses for retesting of the unqualified items. If one of the indicators fails after the retest, the batch of hoses is considered unqualified. 7 Marking, packaging, transportation, storage, selection, use and maintenance 7.1 Except that both ends of the hose must be sealed, its marking, packaging and transportation shall comply with the requirements of GB/T9577. 7.2 The storage, selection, use and maintenance of the hose shall comply with the requirements of GB/T9576. 7.3 Under the condition that the hose meets the requirements of this standard and GB/T9577 and GB/T9576, the manufacturer shall ensure that the performance of the hose still meets the requirements of this standard within a storage period of no more than 1 year from the date of leaving the factory. Additional remarks:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of the Rubber Hose Sub-Technical Committee of the National Technical Committee for Standardization of Rubber and Rubber Products. This standard was drafted by the Shenyang Rubber Industry Products Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Wang Baozhu, Li Dongping, Yan Songfeng, Wang Weixiang and Yu Kaihui.
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