This standard specifies the terminology, types and codes, test methods and inspection rules of cable metal sheaths. This standard covers the use of dry cable metal sleeves 1B 5268. Level 2 should be implemented together with this standard. JB/T 5268.1-1991 Cable Metal Sheath Part 1 General Principles JB/T5268.1-1991 Standard download and decompression password: www.bzxz.net

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Pressing Machinery Ring Industry Standard JB/T5268.11991
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This standard specifies the terminology, types and codes, test methods and inspection rules of cable metal sheaths. This standard applies to cable metal sleeves. JB5268.2, etc. should be implemented together with this standard. Reference standards
2
GB8170
3 terminology
numeric rounding rules
.1 Cable metal sheath
covering in cable relay The sealing sleeve made of metal material is used on the core. 3.2 Lead sleeve
A sealing sleeve made of lead or lead alloy.
8.3 Aluminum sleeve
Sealing sleeve made of aluminum or aluminum alloy.
3.4 ??Steel Sleeve
Sealing sleeve made of steel or steel alloy.
3.5 copper sleeve
Sealing sleeve made of copper or copper alloy.
3.6 wrinkled metal sleeve
A metal sleeve with a certain corrugated shape.
3.7 Welded metal sleeves
Metal sleeves with welds (fusion welding).
3.8 Welded corrugated metal sleeve
A metal sleeve with welding seams (fusion welding) and a certain corrugated shape. 4 Types and codes
The types and codes of cable metal sheaths must comply with the requirements in Table 1. Table
type
1
2
lead sleeve
aluminum sleeve
name
flat aluminum sleeve (referred to as aluminum Set)
Corrugated aluminum sleeve
Welded wrinkled aluminum sleeve
1991-06-28rat
1
Weighing
JB/T5268 .1±1991
Generation
Q
No.
LW
LW
1992-07-01
1
Type
3
4
5 Test method
5.1 Test temperature
Welded corrugated steel sleeve
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Continued Table 1
Weighing
Flat copper sleeve (referred to as copper sleeve)
Welding wrinkled copper sleeve
Unless otherwise specified, tests of electrical sheaths shall be carried out at room temperature. 5.2 Appearance quality
Use normal visual inspection.
5.3 Thickness measurement
Generation
No.
GW
T
TW
The thickness of the metal sleeve should be checked at The test is conducted on a non-organically damaged sample of approximately 50 mm in length taken from either end of the cable. Use a micrometer with a semicircular head and an accuracy of 0.01mm. Starting from the thinnest point along the ring, measure the thickness at 6 points as equally spaced as possible. The arithmetic mean of the 6 measured values ??is used as the average thickness of the metal sleeve, in millimeters. The calculated value should be rounded to one decimal place, and the thickness of the thinnest point is the minimum thickness of the metal sleeve. The sample can also be cut longitudinally, carefully flattened, and then measured according to the above method. 5.4 Numerical rounding
The numerical values ??obtained by test measurement and calculation should be rounded according to GB8170. E Inspection Rules
B.1 The cable metal sleeve shall be subject to factory inspection (R), sampling inspection (S) and type inspection (T) by the quality inspection department of the manufacturer in accordance with the provisions of subsequent sub-standards.
6.2 Factory inspection (R)
6.2.1 Factory inspection must be carried out for each cable metal sleeve of manufacturing length or delivery length. 6.2.2 If any item fails the factory inspection, the cable metal sheath will be deemed unqualified. 6.2.3 Repeat factory inspection of unqualified products is allowed. 6.3 Sampling inspection (S)
6.3.1 Unless otherwise specified, sampling inspection shall be conducted on any three samples from different cable metal sheaths in the same manufacturing batch (same batch). 6.3.2 The gold exhibition sets made of the same material and made by the same machine within the specified quantity or inspection period are regarded as the same batch. 6.3.3 When the sampling inspection results are unqualified, double the number of samples should be taken from the same batch of metal sleeves for a second test on the unqualified items. If one or more samples are still unqualified, 100% of the samples should be tested. test. 6.4 Type inspection (T)
6.4.1 Type inspection is carried out before the product is finalized and put into production. 6.4.2 Unless the metal material, structure and production process used have changed and may affect the performance of the metal sleeve, the type inspection will generally not be repeated after it has been done once.
6.4.3 Metal sleeves that fail the type inspection shall not be put into production. Additional notes:
This standard is proposed and managed by the Shanghai Cable Research Institute of the Ministry of Mechanical and Electronics Industry. This standard was drafted by the Shanghai Cable Research Institute of the mechanical and electronic industry. The main drafter of this standard is Xu Yinglin.
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