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JB/T 12549-2015Tension-torsion combined testing machines for fasteners (English PDF)

紧固件拉-扭复合试验机

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Issued by

MIIT

Level / Type

Industry · Recommended

Issue date

October 10, 2015

Implementation date

March 1, 2016

Scope

JB/T 12549-2015 is the English-translated version of 紧固件拉-扭复合试验机.

Tension-torsion combined testing machines for fasteners are the subject of JB/T 12549-2015, a recommended Chinese machinery industry standard.

It gives the terms and definitions, the type and classification, the technical requirements, the inspection methods, the inspection rules and the provisions on marking and packaging for machines used to determine the tightening characteristics of threaded fasteners.

The standard applies to testing machines that measure the tightening of threaded fasteners by the method given in GB/T 16823.3, with a maximum tension of 1000 kN and a maximum torque of 10 000 N·m. It was issued on 10 October 2015 and took effect on 1 March 2016.

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Document preview — JB/T 12549-2015

National Standard of the People's Republic of China

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

1 Scope
2 Normative references
3 Terms and definitions
4 Type and grading
5 Technical requirements
6 Inspection methods
7 Inspection rules
8 Marking and packaging
Annex A (informative) Built-in type tension-torsion combined testing machine for fasteners
Annex B (informative) External type tension-torsion combined testing machine for fasteners
Figure A.1 Built-in type tension-torsion combined testing machine for fasteners
Figure B.1 External type tension-torsion combined testing machine for fasteners
Table 1 Grading parameters and characteristic values of the measuring and indicating system of the testing machine
Table 2 Rotational speed deviation and repeatability of the driving chuck
Table 3 Flatness of the test surface of the test support washer
Table 4 Noise correction values

3 Terms and definitions

4 Type and grading

5 Technical requirements

6 Inspection methods

7 Inspection rules

8 Marking and packaging

Foreword

This document was issued on 10 October 2015 by the Ministry of Industry and Information Technology of the People's Republic of China, and has been in force since 1 March 2016.

It is the first edition of this standard.

About this edition

JB/T 12549-2015 is the first edition of this standard. It was issued on 10 October 2015 and has been in force since 1 March 2016.

There is no earlier edition to compare it with, so a specification that has to refer to this subject can only cite JB/T 12549-2015 itself.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one announced by the Ministry of Industry and Information Technology of the People's Republic of China.

Edition history and citation

JB/T 12549-2015 is a first edition: there is no earlier version of this standard, so a document that needs to refer to this subject can only cite JB/T 12549-2015 itself.

Where an edition is replaced, the Chinese standardization system keeps the number and changes the year: the number identifies the subject, the year identifies the text. That is why a citation without a year is ambiguous and a citation with one is not.

Classification and status

JB/T 12549-2015 carries no ICS number in the official record.

The JB/T prefix marks a recommended standard of China's machinery industry, issued by the Ministry of Industry and Information Technology. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

How this standard is designated

The full designation is JB/T 12549-2015. A citation should carry the number with its year, because the year identifies the text that applies.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Similar standards

JB/T 9397-2013|JB/T 6546.1-2015|JB/T 6546.2-2015|JB/T 6546.3-2015|JB/T 6555.1-2010|JB/T 6555.2-2010

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