GB/T 31052.4-2017 in English

VALID

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Standard No:	GB/T 31052.4-2017
Document status:	VALID
Title in English:	Lifting appliances―Code of inspection and maintenance―Part 4:Jib cranes
Title in Chinese:	起重机械检查与维护规程第4部分：臂架起重机
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2017-05-12
Implemented on:	2017-12-01
ICS Classification:	53.020.20-Cranes
Chinese Classification:	J80-Hoisting machinery
Professional Classification:	GB-National Standard
Related Topics:	maintenance procedures Safety Regulations for Lifting Appliances Part 7 Lifting machinery inspection and maintenance Lifting machinery inspection and maintenance Lifting machinery inspection and maintenance procedures Crane Installation Regulations Safety Regulations for Lifting Appliances Part 2 Safety Regulations for Lifting Appliances Part 4 GB/T 31052.4 GB/T 31052.4-2017 GM-4 grinding prototype weight Lifting machinery safety inspection and maintenance procedures Robotic arm industry

《GB/T 31052.4-2017起重机械检查与维护规程第4部分：臂架起重机》由TC227（全国起重机械标准化技术委员会）归口，主管部门为中国机械工业联合会。

Introduction

Standard Framework and Technological Evolution

Version	Main Changes	New Content	Improved Safety Requirements
2017 Version	Detailed Inspection Items to 135	Added Special Clauses for Container Cranes	Strengthened Inspection of Electronic Control Systems
Historical Versions	Basic Requirements	General Clauses	Mainly Mechanical Structure

Daily inspection: carried out before daily operation, covering key components such as wire ropes and brakes
Periodic inspection: divided into weekly/monthly/quarterly/annual inspections, of which annual inspections require the completion of all 135 inspections
Special inspection: triggered by 15 special situations such as overload and collision

Item	Method	Standard	Cycle
Structural welds	Visual inspection + non-destructive testing	No visible cracks	Annual inspection

Links	Implementation points	Record requirements
Inspection plan	Develop in combination with work level (A1-A8)	Retain original inspection form
Staff training	Key training Appendix A/B project identification	Assessment record archiving
File management	Inspection reports shall be kept for ≥5 years	Electronic archiving

Application of non-destructive testing: TOFD detection is used for key welds of arm system
Electronic system verification: Add PLC program verification link

Wind-resistant device inspection requires simulation of level 10 wind pressure test
Emergency stop system must be independent of PLC setting
Aerial work platform requires double guardrail design

More samples: QC/T 942-2021 GB 18306-2015 DL/T 368-2010

Sample only — not a preview of GB/T 31052.4-2017

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