AS 1755-1986

1 - AS 1755-1986 CONVEYORS - DESIGN, CONSTRUCTION, INSTALLATION, AND OPERATION - SAFETY REQUIREMENTS
4 - PREFACE
5 - CONTENTS
7 - SECTION 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 PURPOSE.
7 - 1.3 APPLICATION.
7 - 1.4 REFERENCED DOCUMENTS.
7 - 1.5 DEFINITIONS
7 - 1.5.1 Accompanying documents
7 - 1.5.2 Controls
7 - 1.5.3 Control circuit isolation
7 - 1.5.4 Equipment and parts
8 - 1.5.5 Fail safe
8 - 1.5.6 Guards
8 - 1.5.7 Nip point
8 - 1.5.8 Power isolation
8 - 1.5.9 Regulatory Authority
8 - 1.5.10 Shall and should
8 - 1.5.11 Shear point
8 - 1.5.12 Whole current isolation
9 - SECTION 2. MATERIALS
9 - 2.1 GENERAL.
9 - 2.2 MATERIAL SPECIFICATIONS.
10 - SECTION 3. DESIGN AND CONSTRUCTION
10 - 3.1 GENERAL.
10 - 3.2 DESIGN AND CONSTRUCTION.
10 - 3.2.1 General.
10 - 3.2.2 Design requirements.
10 - 3.2.3 Brakes and brake devices.
10 - 3.2.4 Lubrication of bearings.
10 - 3.2.5 Take-ups and counterweights.
10 - 3.2.6 Wire ropes.
10 - 3.2.7 Hinged sections.
11 - SECTION 4. INSTALLATION
11 - 4.1 GENERAL.
11 - 4.2 ACCESS TO CONVEYORS.
11 - 4.2.1 Platforms to be provided.
11 - 4.2.2 Use of ladders.
11 - 4.2.3 Crossovers.
11 - 4.3 CROSSOVERS FOR AISLES AND PASSAGE-WAYS.
11 - 4.4 CONVEYORS INSTALLED IN TUNNELS OR PITS.
11 - 4.4.1 Working clearance.
11 - 4.4.2 Ventilation and drainage.
11 - 4.4.3 Depth indication.
11 - 4.4.4 Alternative egress.
11 - 4.4.5 Use of covers for headroom.
11 - 4.4.6 Removal of accumulated material.
11 - 4.5 LIGHTING.
11 - 4.6 ELECTRICAL REQUIREMENTS.
11 - 4.7 PROTECTIVE DEVICES.
11 - 4.7.1 General.
11 - 4.7.2 Overload protection.
11 - 4.7.3 Types of device.
12 - 4.7.4 Speed control.
12 - 4.8 CONVEYOR CONTROL.
12 - 4.8.1 General.
12 - 4.8.2 Drive power isolation.
12 - 4.8.3 Motor isolation.
12 - 4.8.4 Control circuit isolation.
12 - 4.8.5 Whole current isolation.
12 - 4.8.6 Starting controls.
12 - 4.8.7 Stop controls.
13 - 4.9 FIRE PROTECTION.
14 - SECTION 5. GUARDING
14 - 5.1 GENERAL.
14 - 5.2 DESIGN AND CONSTRUCTION OF GUARDS.
14 - 5.2.1 General.
15 - 5.2.2 Reach dimensions
15 - 5.2.3 Guard placement.
17 - 5.3 DANGEROUS PARTS REQUIRING GUARDING
17 - 5.3.1 Minimum clearance of moving parts.
17 - 5.3.2 Nip points and shear hazards.
17 - 5.3.3 Rotating parts.
17 - 5.3.4 Hoppers and chutes.
17 - 5.4 REMOVAL OF GUARDS.
17 - 5.4.1 Fixed guards.
17 - 5.4.2 Removable guards and covers.
17 - 5.5 GUARDING OF OTHER AREAS.
17 - 5.5.1 Loading, unloading, and discharge points.
17 - 5.5.2 Guarding of openings in floors.
17 - 5.5.3 Restricted areas.
23 - SECTION 6. SPECIFIC REQUIREMENTS FOR UNIT-HANDLING CONVEYORS
23 - 6.1 GENERAL.
23 - 6.2 SLAT CONVEYORS.
23 - 6.3 TOWING CONVEYORS
25 - 6.4 ROLLER FLIGHT CONVEYORS.
25 - 6.5 FLAT BELT CONVEYORS.
25 - 6.5.1 Protective plate.
25 - 6.5.2 Transfer points.
25 - 6.5.3 Return idler guarding.
25 - 6.6 OVERHEAD CHAIN OR CABLE CONVEYORS.
25 - 6.7 OVERHEAD CHAIN OR CABLE CONVEYOR (POWER AND FREE TYPE).
25 - 6.8 SWING TRAY CONVEYORS
25 - 6.8.1 Fork tray type.
25 - 6.8.2 Solid tray type.
26 - 6.9 VERTICAL CHAIN CONVEYORS (OPPOSED SHELF TYPE)
27 - SECTION 7. SPECIFIC REQUIREMENTS FOR BULK-HANDLING CONVEYORS
27 - 7.1 GENERAL.
27 - 7.2 SAFE ACCESS.
27 - 7.2.1 Walkways
27 - 7.2.2 Crossovers and underpasses.
27 - 7.2.3 Access to drive unit.
27 - 7.2.4 Nip points.
27 - 7.3 BELT CONVEYORS.
27 - 7.3.1Danger points.
27 - 7.4 SCREW CONVEYORS.
27 - 7.5 EN MASSE AND BUCKET CONVEYORS.
27 - 7.6 VIBRATING AND OSCILLATING CONVEYORS.
27 - 7.7 DRAG CHAIN CONVEYORS.
28 - SECTION 8. SPECIFIC REQUIREMENTS FOR MOBILE AND PORTABLE CONVEYORS
28 - 8.1 GENERAL.
28 - 8.2 DESIGN AND CONSTRUCTION.
28 - 8.3 STABILITY.
28 - 8.4 ATTACHMENT POINTS FOR TOWING.
28 - 8.5 BOOM MOUNTING.
28 - 8.6 LOCKING AGAINST CREEP.
28 - 8.7 PNEUMATIC TYRES.
28 - 8.8 LOSS OF POWER.
28 - 8.9 WIRE ROPE.
28 - 8.9.1 Safety factors and diameter ratios.
28 - 8.9.2 Attachment
28 - 8.9.3 Minimum diameter.
28 - 8.9.4 Load equalizing.
28 - 8.9.5 Anchorages.
28 - 8.10 BOOM OR TRUNKING.
28 - 8.10.1 Minimum approach.
28 - 8.10.2 Separation from drive.
28 - 8.10.3 Warning notice.
28 - 8.11 CONVEYOR DRIVE.
28 - 8.12 CONTROL OF MOTOR DRIVE.
28 - 8.12.1 General.
29 - 8.12.2 Electric power supply.
29 - 8.12.3 Clutches.
29 - 8.13 GUARDING.
29 - 8.14 SAFE ACCESS.
30 - SECTION 9. INSPECTION AND MAINTENANCE
30 - 9.1 GENERAL.
30 - 9.2 REGULAR CHECKS.
30 - 9.3 REMOVAL OF GUARDS.
30 - 9.4 SAFETY OF PERSONNEL.
30 - SECTION 10. INSTRUCTIONS FOR OPERATING AND MAINTENANCE
30 - 10.1 GENERAL.
30 - 10.2 SYNOPSIS OF PLANT.
30 - 10.3 OPERATING INSTRUCTIONS.
30 - 10.4 MAINTENANCE INSTRUCTIONS.
30 - 10.5 SPARE PARTS.
31 - SECTION 11. TRAINING AND SUPERVISION OF OPERATORS
31 - 11.1 TRAINING.
31 - 11.2 SAFE OPERATING PROCEDURES.
31 - 11.3 SAFE WORKING METHODS.
32 - SECTION 12. MARKING AND IDENTIFICATION
32 - 12.1 MARKING OF CONVEYORS.
32 - 12.2 NAMEPLATES AND LABELS.
32 - 12.3 IDENTIFICATION.
32 - 12.4 LOAD CAPACITY.
32 - 12.5 MARKING OF CONTROLS.
32 - 12.5.1 Start and stop controls.
32 - 12.5.2 Emergency stop control.
32 - 12.6 LOCATION OF SIGNS.
33 - APPENDIX A - GLOSSARY OF CONVEYOR TERMS
33 - A1 ANTI-RUNBACK DEVICES.
33 - A1.1 Anti-runback device for belt conveyors
33 - A1.2 Anti-runback device for overhead chain conveyor
34 - A1.3 Anti-runaway device for overhead chain conveyor
34 - A2 APRON CONVEYORS.
34 - A2.1 Apron conveyor
35 - A2.2 Apron conveyor with pans
35 - A3 BELT CONVEYORS.
35 - A3.1 Belt conveyor
36 - A3.2 Fixed belt conveyor
36 - A3.3 Mobile belt conveyor
37 - A3.4 Portable belt conveyor
37 - A3.5 Belts conveyor, thrower or spreader
37 - A3.6 Blanket, or twin band conveyor
38 - A3.7 Closed belt conveyor
38 - A3.8 Flat belt conveyor
38 - A3.9 Sloping belt conveyor
39 - A3.10 Telescopic belt conveyor
39 - A3.11 Troughed belt conveyor
39 - A4 BARREL OR DRUM CONVEYOR
40 - A5 BUCKET CONVEYORS.
40 - A5.1 Bucket conveyor
40 - A5.2 Bucket elevator
41 - A5.3 Continuous bucket conveyor
41 - A5.4 Gravity bucket conveyor
41 - A5.5 Inclined belt and bucket conveyor
42 - A5.6 Pivoted bucket conveyor
42 - A5.7 Vertical belt and bucket conveyor
42 - A5.8 Vertical internal discharge chain and bucket conveyor
43 - A6 CHAIN CONVEYORS.
43 - A6.1 Chain conveyor
43 - A6.2 Chain conveyor with driving dogs
43 - A6.3 Chain or wire rope belt conveyor
43 - A6.4 Drag chain conveyor
43 - A6.5 Overhead chain conveyor (open track type)
44 - A6.6 Overhead chain conveyor (enclosed track)
44 - A6.7 Overhead chain or cable conveyor (power and free type)
44 - A6.8 Positive discharge type chain and bucket conveyor
45 - A6.9 Raised link or offset roller chain conveyor
45 - A6.10 Single chain or crate conveyor
45 - A6.11 Sliding chain conveyor
45 - A6.12 Swing chain conveyor
46 - A6.13 Swing chain conveyor, fork tray type
46 - A6.14 Swing tray conveyor, solid tray type
47 - A6.15 Twin rail conveyor (Power and free type)
47 - A6.16 Twin chain type, swing tray
47 - A6.17 Vertical bag or bale conveyor
48 - A6.18 Vertical chain conveyor, opposed shelf type
48 - A7 CROSS-BAR CONVEYOR
48 - A8 DISC OR BUTTON CONVEYOR
49 - A9 EN MASSE CONVEYOR
49 - A10 FLIGHT CONVEYORS
49 - A10.1 Flight conveyor (push-type)
49 - A10.2 Flight conveyor (reciprocating)
49 - A11 PALLET TYPE CONVEYOR
50 - A12 POCKET CONVEYOR
50 - A13 PUSHER BAR CONVEYOR
50 - A14 TRUCK-TOWING CONVEYORS.
50 - A14.1 Floor truck-towing conveyor
51 - A14.2 Single strand floor-mounted truck conveyor
51 - A14.3 Over and under single strand floor truck conveyor
51 - A14.4 Overhead monorail chain conveyor
51 - A15 GRAVITY CHUTE
52 - A16 HYDRAULIC CONVEYORS
52 - A16.1 Hydraulic conveyor
52 - A16.2 Open type hydraulic conveyor
52 - A16.3 Tube type I hydraulic conveyor
52 - A16.4 Tube type II hydraulic conveyor
53 - A17 INCLINED BAG CONVEYOR
53 - A18 MAGNETIC CONVEYOR
53 - A19 OSCILLATING CONVEYOR
53 - A20 PLATE CONVEYOR
54 - A21 POWDERED ROLLER CONVEYOR
54 - A22 RECIPROCATING BEAM CONVEYOR
54 - A23 ROLLER CONVEYOR
54 - A24 SCRAPER DRAG BAR OR DRAG LINK CONVEYOR
55 - A25 SCREW CONVEYORS.
55 - A25.1 Screw conveyors
55 - A25.2 Screw tube conveyor
55 - A25.3 Vertical screw tube conveyor
56 - A25.4 Screw auger conveyor
56 - A25.5 Screw conveyor, trough type
56 - A25.6 Screw conveyor, full-bladed type
56 - A25.7 Screw conveyor, paddle type
57 - A25.8 Screw conveyor, ribbon type
57 - A25.9 Screw tube conveyor
57 - A26 SHUTTLE CONVEYOR
57 - A27 SLATE CONVEYORS.
57 - A27.1 Slat conveyors
58 - A27.2 Slat conveyor with pushers
58 - A27.3 Slat band conveyor
58 - A28 SLING OR POCKET CONVEYOR
59 - A29 STEEL BAND CONVEYOR
59 - A30 THROWING MACHINE, VANE TYPE
59 - A31 TWIN FLAT TOP CONVEYOR
60 - A32 TRANSFER TABLES.
60 - A32.1 Transfer tables
60 - A32.2 Ball transfer table
60 - A32.3 Roller conveyor transfer (right angle)
60 - A32.4 Roller conveyor transfer (straight through)
60 - A32.5 Roller conveyor turntable
61 - A32.6 Roller flight conveyor (accumulating)
61 - A32.7 Roller conveyor
61 - A32.8 Hinged section
61 - A32.9 Wheel conveyor
62 - A33 TRIMMER CONVEYOR
62 - A34 TRIPPER
62 - A35 TROLLEY CONVEYOR
63 - A36 VIBRATING CONVEYOR
63 - A37 WALLED BELT CONVEYOR
63 - A38 WIREMESH BELT CONVEYOR
64 - APPENDIX B - EXAMPLE OF A WORK PERMIT
66 - ANNEX - LIST OF REFERENCED DOCUMENTS

Specifies the minimum safety requirements for the design, construction, installation, and guarding of conveyors and conveyor systems, with specific requirements for unit and bulk handling conveyors. Recommendations for inspection, maintenance, marking, and identification of the equipment together with the necessary details for operator training are also given.

This standard applies to the design, construction, installation, and guarding of conveyors and conveyor systems, whether of a temporary or permanent nature, for the conveyance of materials. It sets out requirements for materials of construction, mechanical design, general safety requirements, specific requirements for unit and bulk handling conveyors, training and supervision of operators,inspection and maintenance, and operating and maintenance instructions. The standard is not intended to apply to industrial trucks, tractors or trailers, prime movers coupled with monorails, tiering machines, cranes, hoists, skip hoists, monorails, power shovels, power scoops, bucket drag lines, platform elevators designed to carry passengers or the elevator operator, moving stairways and highway or rail vehicles, or conveyors specifically designed for the conveyance of passengers.This standard does not cover individually powered or line shaft powered rollers, which are used in other than continuous manufacturing industries (see also Clause 1.5.4.2). A glossary of conveyor terms is provided in Appendix A.

Under Revision See DR 97349