GB/T 41676-2022Cranes - General design - Limit states and proof of competence of forged steel hooks (English PDF)

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"

drafting.

This document is modified to adopt ISO 17440.2014 "General Rules for Design of Cranes - Limit State and Capability Verification of Forged Steel Hooks".

Compared with ISO 17440.2014, this document has made the following structural adjustments.

--- Added informative appendix A;

---Appendix B corresponds to Appendix C in ISO 17440.2014;

---Appendix C corresponds to Appendix H in ISO 17440.2014;

---Appendix D corresponds to Appendix F in ISO 17440.2014;

---Appendix E corresponds to Appendix A in ISO 17440.2014;

---Appendix F corresponds to Appendix B in ISO 17440.2014;

---Appendix G corresponds to Appendix G in ISO 17440.2014;

---Appendix H corresponds to Appendix I in ISO 17440.2014;

---Appendix I corresponds to Appendix E in ISO 17440.2014;

---Appendix J corresponds to Appendix D in ISO 17440.2014;

---Appendix K corresponds to Appendix J in ISO 17440.2014;

---Appendix L corresponds to Appendix K in ISO 17440.2014.

Compared with ISO 17440.2014, this document has more technical differences, and vertical

A single line (︱) is indicated. See Appendix A for a list of these technical differences and their causes.

Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.

1 Scope

This document specifies the general requirements, static strength, fatigue strength, compliance verification and usage information for forged steel hooks of cranes.

This document applies to the following hook components and hook types.

---Any type of forged steel hook body;

---Thread/nut structure type machined hook shank.

Note 1.In principle, this document also applies to hooks of other shank types and the determination and use of relevant stress concentration factors for hook shank structures. This document does not

Suitable for laminated hooks consisting of one or more rolled steel plates.

This document applies to hooks whose ultimate tensile strength of the material does not exceed 800N/mm2 and the ultimate yield strength does not exceed 620N/mm2.

The following are major hazardous situations and hazardous events that may cause harm to personnel during normal use and foreseeable misuse, Chapter 4 ~ Chapter 4

Chapter 8 specifies the relevant requirements to reduce or eliminate the risks associated with it.

--- beyond the strength limit (yield, tensile and fatigue);

--- Exceeding the temperature limit of the material;

--- Accidentally remove the load from the hook.

Note 2.This document is only applicable to the limit state design method in accordance with GB/T 22437.1.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

this document.

GB/T 197 Common thread tolerances (GB/T 197-2018, ISO 965-1.2013, MOD)

GB/T 228.1 Tensile tests on metallic materials - Part 1.Test methods at room temperature (GB/T 228.1-2021, ISO 6892-1.

2019, MOD)

GB/T 228.3 Tensile tests on metallic materials - Part 3.Low temperature test methods (GB/T 228.3-2019, ISO 6892-3.

2015, MOD)

GB/T 229 Charpy pendulum impact test method for metallic materials (GB/T 229-2020, ISO 148-1.2016, MOD)

GB/T 3505 Product Geometric Specifications (GPS) Surface Structure Profiling Terms, Definitions and Surface Structure Parameters

(GB/T 3505-2009, ISO 4287.1997, IDT)

Inspection of GB/T 3808 pendulum impact testing machine (GB/T 3808-2018, ISO 148-2.2008, MOD)

GB/T 6974.1 Crane Terminology Part 1.General Terms (GB/T 6974.1-2008, ISO 4306-1.2007, IDT)

GB/T 10051.2 Lifting hooks Part 2.Specifications for forged hooks

GB/T 10051.4 Lifting hooks - Part 4.Blanks with straight handle and single hook

GB/T 10051.6 Lifting hooks - Part 6.Blanks with straight shanks and double hooks

GB/T 15706 General Principles of Machinery Safety Design Risk Assessment and Risk Reduction (GB/T 15706-2012, ISO 12100.

2010, IDT)

GB/T 16825.1 Inspection of static uniaxial testing machines - Part 1.Inspection and calibration of force measuring systems of tensile and (or) compressive testing machines