This standard specifies the technical requirements, inspection rules, packaging, storage and transportation of steel wire and cotton wire braided hose assemblies. This standard applies to various steel wire and cotton wire braided hose assemblies and related parts specified in JB/T 6142~6144. JB/T 6145-1992 Technical conditions for steel wire and cotton wire braided hose assemblies JB/T6145-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T6145-92
Steel Wire and Cotton Thread Braided Hose Assembly
Technical Conditions
Published on 1992-06-09
Ministry of Machinery Industry of the People's Republic of China
Implemented on 1993-01-01
Mechanical Industry Standard of the People's Republic of China
Steel Wire and Cotton Thread Braided Hose Assembly
Technical Conditions
Subject Content and Scope of Application
JB/T6145-92
This standard specifies the technical requirements, inspection rules, packaging, storage and transportation of steel wire and cotton thread braided hose assemblies. This standard applies to various steel wire and cotton thread braided hose assemblies and related parts specified in JB/T6142~6144. Reference standards
GB1184
GB/T1804
GB2828
GB7038
GB7306
GB7307
GB7935
GB7939
ZBT04002
Technical requirements
Thread finish, shoulder distance, undercut, chamfer Ordinary thread. Basic dimensions (diameter 1 ~ 600mm) Ordinary thread, tolerance and fit (diameter 1 ~ 355mm) High-quality carbon structural steel Technical conditions
Tolerances of form and positionProvisions of tolerances not specifiedGeneral tolerancesTolerances not specified for linear dimensions
Batch inspectionCount sampling procedures and sampling tables (applicable to inspection of continuous batches)Fastener tolerancesBolts, screws and nuts
O-rings for ordinary hydraulic systemsRubber seals for pipe threads sealed with rubber
Pipe threads not sealed with threads
General technical conditions for hydraulic components
Test methods for hydraulic hose assemblies
60° thread angleInch tapered threadbZxz.net
The materials of the parts shall be as specified in Table 1.
Parts Name
Connector Core
Connector Jacket
Cone Connector
Tensile Strength N/mm
Wire Braided Hose Assembly
≥600
≥410
≥410
Cotton Braided Hose Assembly
Wire Braided Hose Assembly
≥410
≥410
≥335
Note: If other materials are required, it shall be agreed upon by both parties. 35
Cotton Braided Hose Assembly
Standard No.
3.2 The surface of metal parts is generally oxidized (blackened or bluish). If galvanized passivation or other surface treatment is required, it shall be agreed upon by both parties. 3.3 The material of O-ring shall comply with the provisions of GB7038 if there is no special requirement. 3.4 Thread
Approved by the Ministry of Machinery and Electronics Industry on June 9, 1992 and implemented on January 1, 1993
JB/T6145-92
3.4.1 The basic dimensions of common threads shall comply with the provisions of GB196, and the thread tolerances shall comply with the provisions of GB197: 6H for internal threads and 6g (without coating) or 6f (with coating) for external threads;
The basic dimensions and tolerances of cylindrical pipe threads shall comply with the provisions of GB7307 for grade A; the basic dimensions and tolerances of tapered pipe threads shall comply with the provisions of GB7306; the basic dimensions and tolerances of tapered threads shall comply with the provisions of ZBT04002. 3.4.2·The dimensions of thread finish, shoulder distance, undercut and chamfer shall comply with the provisions of GB3. The surface roughness parameter R. value of the external thread side is 3.2um, and the surface roughness parameter R. value of the internal thread side is 6.33.4.3
μm.
The surface of the part is not allowed to have cracks, burrs, flash, dents and scratches that affect the use. The connection between the hose and the joint should be flat, and the inner wall of the hose should be smooth, unobstructed and free of scratches. When assembling the wire braided hose assembly, the 3.6
steel wire shall not be damaged, and there shall be no exposure of the steel wire.
3.7The chamfer of the hexagonal end face of the part is about 30°, and the chamfer diameter d~0.95S (see Figure 1) Figure 1
The shape and position tolerance of the hexagonal head of the part shall be in accordance with the provisions of GB3103.1. The limit deviation of the S size of the hexagonal head of the part shall be in accordance with Table 2. Table 2
Limit deviation
The limit deviation of the S size of casting and die forging shall be in accordance with Table 3. Table 3
Limit deviation
3.11, Limit deviation of unindicated tolerance dimensions of parts and unindicated shape and position tolerance The limit deviation of unindicated tolerance dimensions of metal cutting parts on parts shall not be lower than the m (medium grade) provisions in GB/T1804. 3.11.1
The unindicated shape and position tolerance of parts shall not be lower than the C grade provisions in GB1184. 3. 11.2
3.11.3 The ratio of the major and minor axes of the cross section of the bending part of the joint core α/b≤1.20. See Figure 2. 2
JB/T6145-92
3 The coaxiality of the axis of the 24° inner cone of the part and the axis of the tightening thread, and the coaxiality of the axis of the 24° outer cone of the part and the axis of the outer diameter of the pipe 3.13
The tolerance is 0.1mm.
The verticality tolerance between the end face of the hexagonal support surface of the part equipped with a combined gasket and the thread axis is 0.1mm. 3.14
3.15For the 90° elbow core, the verticality deviation between the axis and the axis of the outer cone after bending is ±0.3mm. 3.16
The hose assembly must be cleaned, and the cleanliness must comply with the provisions of GB7935. Inspection rules
The hose assembly must undergo type testing and factory testing, and the test methods must comply with the provisions of GB7939. 4.1
The hose assembly must be pressure tested together with the matching cone joint after assembly. 4.2The sampling plan for the pressure test of the hose assembly shall be as specified in Table 4. Table 4
91~150
151~280
281~500
501~1200
Note: The batch range and sampling number shall comply with the provisions of GB2828. Sampling
Acceptance Standard
Hose assemblies shall be inspected by the technical inspection department of the manufacturer to ensure that each batch of products complies with the provisions of this standard and shall be accompanied by a certificate of product qualification. 4.3
Packaging, storage and transportation
5.1 After the assembly is assembled with the matching cone joint, both ends must be sealed. 5.2 The crimping part of the assembly must be marked with the inner diameter of the hose and the working pressure. The threaded cone joint matching the assembly must be marked with the nominal diameter and the code of the connecting thread size. 5.3 The assembly shall be bundled flat or coiled depending on the batch size, length, etc. Each bundle shall not exceed 50kg. The bending radius of the coiled bundle shall not be less than the minimum bending radius specified for the hose. After bundling, add packaging to ensure that the hose assembly is not damaged during transportation. 5.4 The hose assembly should be protected from direct sunlight, rain and snow during storage and transportation. It is prohibited to contact with materials that affect the quality of the assembly, such as acids, alkalis, fuels and organic solvents. The storage temperature is -15 to +40°C; the relative humidity shall not be greater than 80%. 3
JB/T6145-92
5 In the case of compliance with Article 3.4 of this standard, the product shall be 1 year from the date of manufacture. If the user finds quality problems, the manufacturer shall implement 5.5
Three Guarantees.
The outer packaging shall have the following signs:
Manufacturer name;
Name and code of hose assembly;
Quantity;
Manufacture date or production batch number.
Product certificate shall include:
Manufacturer name;
Name and code of hose assembly;
Manufacture date or production batch number;
Signature of technical department.
Assembly length L
Assembly length L
Assembly length L
Additional instructions:
JB/T6145-92
Appendix A
Recommended length of hose assembly
(reference)
This standard is proposed and managed by Xi'an Heavy Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Xi'an Heavy Machinery Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Qi Dingshun.
4000~5000
People's Republic of China
Mechanical Industry Standard
Steel Wire and Cotton Thread Braided Hose Assembly
Technical Conditions
JB/T6145-92
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (P.O. Box 8144, Beijing
Zip Code 100081)||t t||Copyright reserved
No reproduction allowed
Format 880×12301/16
Printing sheet 1/2
Word count 10,000
First edition October 1992
First printing October 1992
Print run 00,001-500 Price 3.00 yuan
No. 1397
26st19 /ar
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