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JJF 1478-2014 English PDF

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JJF 1478-2014: Calibration Specification for High Strength Balt Testers
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1478-2014	English	419	Add to Cart	3 days [Need to translate]	Calibration Specification for High Strength Balt Testers	Valid	JJF 1478-2014

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Basic data

Standard ID	JJF 1478-2014 (JJF1478-2014)
Description (Translated English)	Calibration Specification for High Strength Balt Testers
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A53
Classification of International Standard	17.100
Word Count Estimation	18,150
Date of Issue	8/25/2014
Date of Implementation	11/25/2014
Quoted Standard	JJG 707; GB/T 1231; GB/T 3632; GB 50205
Regulation (derived from)	People's Republic of China The State Administration of Quality Supervision, Inspection and Quarantine Notice 2014 (No. 95); AQSIQ Notice 2014 No. 95
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This Standard applies to a test pressure of not more than 500kN, test torque is not greater than high-strength bolts detector calibration 2kNm, and the detector is mainly used to measure the high-intensity large hexagon head bolts connecting deputy torque

JJF 1478-2014: Calibration Specification for High Strength Balt Testers

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for High Strength Balt Testers People's Republic of China National Metrology Technical Specifications High-strength bolts detector calibration specification Issued on. 2014-08-25 2014-11-25 implementation The State Administration of Quality Supervision, Inspection and Quarantine released High-strength bolts detector calibration specification Focal point. the National Technical Committee on Metering hardness force value Main drafting unit. Beijing Aerospace Institute of Measurement and Testing Technology Zhejiang Institute of Metrology Shaoxing mechanical Kent Electronics Co., Ltd. Guangxi Academy of measuring and testing Shenzhen Academy of Metrology and Quality Inspection Participated in the drafting unit. Jilin Institute of Metrology This specification entrust national force value hardness measurement technical committee responsible for the interpretation The main drafters of this specification. Mei Hongwei (Beijing Aerospace Measurement and Testing Technology Research Institute) Jiang Xiaobo (Zhejiang Institute of Metrology) Liu Sheng (Shaoxing mechanical Kent Electronics Co., Ltd.) Wu Jiansheng (Guangxi Institute of measurement detection) Huangshi Yuan (Shenzhen Quality Inspection Institute of Metrology) Drafters participate. Qu Zhuo (Jilin Institute of Metrology) Yu Rong (Zhejiang Institute of Metrology)

Introduction (Ⅱ) 1 Scope (1) 2. References (1) 3 terminology and units of measurement (1) 3.1 The term (1) 3.2 amount of symbols, units and definitions (1) 4 Overview (2) 5 Metrological characteristics (2) Calibration Condition 6 (2) 6.1 environmental conditions (2) 6.2 Calibration means (2) 7 calibration items and calibration methods (3) 7.1 test force (3) 7.2 Test Torque (3) 8 calibration results expression (4) 9 Recalibration interval (5) Appendix A high-strength bolts detector calibration records (6) Appendix B Test Force showed the error of measurement uncertainty evaluation method and case (7) Appendix C test torque indication error of measurement uncertainty evaluation method and case (10)

Introduction

This specification according to the rules JJF 1071-2010 "National Calibration Specifications writing rules" provisions of the preparation. The calibration specifications in the development process to fully consider the GB 50205-2011 "steel construction quality acceptance Norms ", GB/T 1231-2006" high-strength steel with large hexagon head bolts, hexagon nuts, plain washers Conditions ", GB/T 3632-2008" Steel Structures torsional shear type high strength bolts "and JJG707-2003" twist Torque wrench "in the terminology, symbols and definitions and related technical requirements. This specification gives a high-strength bolts detector calibration Instrument metrological characteristics calibration conditions, calibration items and calibration methods. This specification is the first issue. High-strength bolts detector calibration specification

1 Scope

This standard applies to the test force is not greater than 500kN, test torque is not greater than the high-strength bolts 2kNm Detector Calibration of the detector is mainly used to measure the high-strength hexagon head bolts or torsion coefficient of torsional shear type high strength bolts Deputy connection fastening axial force. 2. References This specification refers to the following documents. JJG707 torque wrench GB/T 1231 steel hexagon bolts, hexagon nuts, plain washers for high-strength GB/T 3632 Steel with torsional shear bolts connecting deputy Steel Engineering Construction Quality Acceptance GB 50205 For dated references, only the dated edition applies to this specification; undated reference documents Member, the latest edition (including any amendments) applies to this specification.

3 terminology and units of measurement

3.1 Terms 3.1.1 torque coefficient torquecoefficient The role of high-strength hexagon head bolts connecting the torque applied to tighten the bolt and bolt pre-tension on the vice nominal thread straight Proportionality coefficient between the diameter. 3.1.2 fastening shaft force tighteningforce The biggest test of torsional shear bolts connecting deputy head bolts are screwed off Plum achieved. 3.2 amount of symbols, units and definitions This specification uses the amount of symbols, and units defined in Table 1. Table 1 and the amount of the definition symbol Symbol Unit Definition Fi N i-th test force instruction value FN test force standard value Fi N same measurement point three test force is the arithmetic mean indication Fi Fimax N same measurement point Test Force showed the value of the maximum Fi Fimin N same measurement point Test Force showed the value of the minimum Fi ΔF N Test Force showed the error Mi Nm i th test torque instruction value

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