Valid

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

Preview PDF

This is a limited preview

Buy now to download the full PDF (125 pages)

Need quotation for your management?

Get a formal quotation for GB/T 41676-2022 in 30 minutes.

Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

October 12, 2022

Implementation date

May 1, 2023

Scope

GB/T 41676-2022 (Cranes - General design - Limit states and proof of competence of forged steel hooks) is available as an English-translated PDF.

GB/T 41676-2022 is the Chinese standard "Cranes - General design - Limit states and proof of competence of forged steel hooks". Its scope clause reads: 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.

Found what you need?

Document preview — GB/T 41676-2022

National Standard of the People's Republic of China

ICS: 53.020.20
Classification: J 80

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

Preface
1 Scope
2 Normative references
3 Terms and definitions, symbols
3.1 Terms and Definitions
3.2 Symbol
4 General requirements
4.1 Materials
4.2 Process
4.3 Manufacturing tolerances
4.4 Heat treatment
4.5 Load verification
4.6 Shaft geometry
4.7 Hook Shank Processing
4.8 Nut
4.9 Hook suspension form
5 static strength
5.1 General requirements
5.2 Design force in vertical direction
5.3 Horizontal Design Force
5.4 Hook Shank Bending Moment
5.5 Hook body design stress
5.6 Design stress of hook shank
5.7 Static Strength Verification of Hook
6 fatigue strength
6.1 General requirements
6.2 Vertical fatigue design force
6.3 Horizontal direction fatigue design force
6.4 Fatigue design bending moment of hook shank
6.5 Verification of fatigue strength of hook body
6.6 Verification of fatigue strength of hook shank
6.7 Fatigue design of series production hook shanks
7 Compliance Verification
7.1 General
7.2 Manufacturing verification
7.3 Load verification
7.4 Non-destructive testing (NDT)
7.5 Test sampling
8 Usage information
8.1 Maintenance and inspection
8.2 Flags
8.3 Safe use
Appendix A (informative) Technical differences between this document and ISO 17440.2014 and their reasons
Appendix B (informative) Appendix E and Appendix F Static Strength Ultimate Design Force of Hook Shaft
Appendix C (Normative) Bending of Curved Beams
Appendix D (informative) Calculation example of fatigue strength of verified hook (applied verification load)
Appendix E (Informative) Example of Single Hook Series
Appendix F (informative) Double hook series example
Appendix G (Informative) Examples of Hook Shank and Thread Series
Appendix H (Normative) Calculation of Tilting Resistance for Hinged or Rope-wrapped Hook Suspension Forms
Appendix I (Normative) Hook Body Calculation and Specific Spectral Ratio Coefficient
Appendix J (Informative) Appendix E and Appendix F Fatigue Strength Ultimate Design Force of Hook Shaft
Appendix K (Informative) Guidelines for Selecting Hook Sizes Using Appendix B, Appendix I and Appendix J
Appendix L (Normative) Information provided by the hook manufacturer

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

GB/T 41976 | GB/T 39416 | GB/T 35975 | GB/T 18874.5 | GB/T 41680 | […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 125 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 965 · ISO 6892 · ISO 148 · ISO 4287.1997 · ISO 4306 · ISO 12100

How to Download GB/T 41676-2022

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.