JT 461-2001 in English

VALID

The safe technical requirement for cement hangling in port

Issued on:2001-12-14
Implemented on:2002-05-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
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Standard No:	JT 461-2001
Document status:	VALID
Title in English:	The safe technical requirement for cement hangling in port
Title in Chinese:	港口水泥装卸作业安全技术要求
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2001-12-14
Implemented on:	2002-05-01
Chinese Classification:	R43-Port handling operation
Professional Classification:	JT-Transport
Related Keywords:	cement loading rainy days bulk cement loading cement hangling safe technical requirement cement operations
Related Topics:	port Safety Technical Requirements for Port Breakbulk Cargo Loading and Unloading Operations port Equipment port saliva job safety loading and unloading Port terminal loading and unloading operations Port sulfur loading and unloading technology Technical specification requirements for the installation of sliding contact lines Shenzhen Port Loading and Unloading Operation Technology

本标准规定了沿海港口水泥装卸作业安全技术要求。
本标准适用于沿海港口袋装水泥和散水泥的装卸作业。内河港口水泥装卸作业可参照执行。

Introduction

Analysis of the core content of the standard

Operation type	Key safety indicators	Special requirements
Bagged cement loading and unloading	Stacking distance ≥1m/Electrical distance ≥2m	Hook-throwing operation is prohibited/open-air operation is prohibited on rainy days
Bulk cement loading and unloading	Dust concentration ≤120mg/m³	Special tank inspection/balanced loading control is required
Silo system	Lightning protection level II/manhole ≥ 0.6m	Interlock monitoring/air pressure 0.5-0.7MPa

Technical evolution background

This standard was revised in 2001, focusing on strengthening three aspects: dust prevention and control (newly added GB16297 emission limits), mechanized operation (clarified equipment specifications such as pneumatic ship unloaders), occupational health (mandatory use of protective equipment). Compared with the 1992 version, 7 special clauses are added to bulk cement operations.

Key term explanation

Hook throwing operation: illegal operation of using the inertia of the crane to throw goods, which is easy to cause the packaging to break. Article 4.6.7 of the standard explicitly prohibits this, and offenders will be punished in accordance with the "Port Safety Management Regulations".

Silo lightning protection: According to the requirements of GB50057, the protection radius of the silo lightning arrester should cover the silo top breathing valve (actual case: a silo with a diameter of 15m needs to be equipped with 3 5m lightning rods).

Implementation suggestions

Equipment selection: Bulk preferably uses a low-noise pneumatic conveying system (≤85dB)
Training points: Silo operators need to master the emergency pressure relief valve operation (simulation drill once every quarter)
Monitoring configuration: Ship loaders should be equipped with an eccentric load alarm device (automatic shutdown if the inclination is ≥3°)