SIST ISO/TR 9172:1996 PDF

Name: SIST ISO/TR 9172:1996 — Continuous mechanical handling equipment -- Safety code for screw conveyors -- Examples of guards for trapping and shearing points
SKU: SIST ISO/TR 9172:1996
Price: 60.09 EUR
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Continuous mechanical handling equipment -- Safety code for screw conveyors -- Examples of guards for trapping and shearing points

Название (английский):

SIST ISO/TR 9172:1996

Continuous mechanical handling equipment -- Safety code for screw conveyors -- Examples of guards for trapping and shearing points

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 1 мая 1996 г.
ICS:: 53.040.10
Технический комитет:: DTN - Lift and transport appliances

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Описание (английский):

Gives examples of the kinds of hazards associated with screw conveyors at danger points, in particular trapping and shearing points located between the moving screw and the fixed parts of the conveyor or surrounding structures. Describes different safety devices, illustrated by examples of design sheets, capable of meeting the general safety requirements.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты SIST

Overview - ISO/TR 9172:1987 (Screw conveyors safety guards)

ISO/TR 9172:1987 is an ISO Technical Report (type 3) that supplements conveyor safety standards for continuous mechanical handling equipment. It documents typical hazards associated with screw conveyors - especially trapping and shearing points where the moving screw meets fixed parts or surrounding structures - and provides illustrated examples of guard types and design sheets that meet the general safety requirements referenced in ISO 1819 and ISO 7149.

Key topics and technical requirements

Hazard identification

Describes common danger points: between screw and trough, between adjacent screws, at feed/discharge openings, tube entries, shaft bearings, support bars and ground level.

Guard types and examples

Closed tubes; fixed solid covers; fixed or removable grid covers; interlocked opening covers; fixed covers with feeding slots; temporary grid covers for cleaning; protective pipes, grids and cone-shaped grills.

Design and dimension guidance

Minimum clearances and protective dimensions are given for typical risks (examples in the report include 25 mm, 50 mm and 5 mm clearances depending on whether fingers or hands are at risk).
Covers and grids must be strong enough for expected loads - e.g., covers that may be stepped on should withstand at least 100 kg/m².
Specific requirements for guarding inlets/outlets, slit widths, safety distances, and progressive reduction of the screw helix are included to prevent access to danger points.

Operational safeguards

Mechanical/electrical interlocks for opening covers; requirements for inlet cones or extended protective pipes at feed ends; protective grills designed to resist the weight of one person.

Scope limitation

Presents illustrative solutions that achieve the required safety level without excluding other equivalent protective methods.

Practical applications

Use ISO/TR 9172:1987 to:

Identify and document trapping and shearing hazards on screw conveyors.
Select or design appropriate guards and inlet/outlet protection for bulk-handling conveyors.
Define minimum clearances and strength criteria for covers, grids and guard-rails.
Support risk assessments, machine design reviews, maintenance procedures and operator protection measures.

Related standards

ISO 1819 - Continuous mechanical handling equipment - Safety code (general rules)

ISO 7149 - Continuous mechanical handling equipment - Safety code (special rules)

Keywords: ISO/TR 9172:1987, screw conveyors, safety code, guards, trapping points, shearing points, continuous mechanical handling equipment, ISO 1819, ISO 7149, conveyor guard design, industrial safety.

SIST ISO/TR 9172:1996 PDF

Abstract

Похожие стандарты

Overview - ISO/TR 9172:1987 (Screw conveyors safety guards)

Key topics and technical requirements

Practical applications

Who should use this standard

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