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GB/T 25318-2019Locking devices for ball and socket couplings of string insulator units - Dimensions and tests (English PDF)

绝缘子串元件球窝联接用锁紧销尺寸和试验

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 10, 2019

Implementation date

July 1, 2020

Scope

GB/T 25318-2019 is the English-translated version of 绝缘子串元件球窝联接用锁紧销尺寸和试验.

GB/T 25318-2019 is the Chinese standard "Locking devices for ball and socket couplings of string insulator units - Dimensions and tests". Its scope clause reads: This standard specifies the shape and standard size of the locking pin, test methods, determination criteria, and other dimensions used only as a guide for manufacturing.

This standard applies to the ball-and-socket connection of insulator string components in GB/T 4056 and the locking pins supplied separately on corresponding metal accessories.

When these lock pins are supplied with insulators or metal accessories, they should be considered as an integral part of the insulator or metal accessories Minute.

In this case, the relevant tests should be included in GB/T 1001.1. When required, a certificate of conformity shall be provided to prove the locking Pins have been tested in accordance with the provisions of this standard.

Locking pins are usually supplied with insulators or corresponding metal accessories. This standard does not include the technical requirements of the material, but it is recommended that the surface of the material should not have an anti-corrosion layer.

In addition, the material should not Significant contact erosion (chemical reaction) occurs between the joints. Its clauses include terms and definitions.

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Document preview — GB/T 25318-2019

National Standard of the People's Republic of China

ICS: 29.080.10
Classification: K 48

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Dimensions and general rules
4.1 General
4.2 Lock pin shape
4.3 Dimensions of the locking pin
5 How to use the locking pin
5.1 R pin
5.2 W pin
6 Test
6.1 Test classification
6.2 Material evaluation test
6.3 Sampling test
6.4 Repeat test procedure
Appendix A (informative) Comparison between this standard and IEC 60372. 1984 chapter number
Appendix B (Normative Appendix) W-Pin Size Inspection Dosage Regulation

1 Scope

This standard specifies the shape and standard size of the locking pin, test methods, determination criteria, and other dimensions used only as a guide for manufacturing.

This standard applies to the ball-and-socket connection of insulator string components in GB/T 4056 and the locking pins supplied separately on corresponding metal accessories.

When these lock pins are supplied with insulators or metal accessories, they should be considered as an integral part of the insulator or metal accessories

Minute. In this case, the relevant tests should be included in GB/T 1001.1. When required, a certificate of conformity shall be provided to prove the locking

Pins have been tested in accordance with the provisions of this standard. Locking pins are usually supplied with insulators or corresponding metal accessories.

This standard does not include the technical requirements of the material, but it is recommended that the surface of the material should not have an anti-corrosion layer. In addition, the material should not

Significant contact erosion (chemical reaction) occurs between the joints.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article

Pieces. For undated references, the latest version (including all amendments) applies to this document.

GB/T 1001.1 Insulators for overhead lines with a nominal voltage higher than 1000V. Part 1. Porcelain or glass insulators for AC systems

Component definition, test method and criterion (GB/T 1001.1-2003, IEC 60383-1..1993, MOD)

GB/T 2828.1 Sampling inspection procedures for counts. Part 1. Batch inspection inspection sampling plan retrieved by acceptance quality limit (AQL) (GB/T 2828.1-2012, ISO 2859-1..1999, IDT)

GB/T 2900.8 Electrical term insulator (GB/T 2900.8-2009, IEC 60050-471..2007, IDT)

GB/T 4056 ball and socket connection size of insulator string components (GB/T 4056-2019, IEC 60120. 1984, MOD)

GB/T 4340.1 Vickers hardness test for metallic materials. Part 1. Test method (GB/T 4340.1-2009, ISO 6507-

1..2005, MOD)

GB/T 4340.4-2009 Vickers hardness test for metallic materials. Part 4. Table of hardness values (ISO 6507-4..2005, IDT)

3 terms and definitions

The following terms and definitions defined in GB/T 2900.8, GB/T 1001.1, GB/T 4056 and GB/T 2828.1 apply to this file.

3.1 Locking pin

Uses the elasticity and/or shape characteristics of its own material to connect insulators and metal accessories together for insulator balls

The socket connection prevents the foot ball from coming out of the hat socket.

3.2 Acceptance quality limit; AQL

When a continuous series of batches is submitted for acceptance sampling, the worst process average quality level allowed. Percent of nonconforming product or per

The number of unqualified products per hundred units is indicated. […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60383 · ISO 2859 · IEC 60050 · IEC 60120 · ISO 6507

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