AA SPEC 373005

 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

CONTENTS

PAGE

1

SCOPE

2

2

TECHNICAL REQUIREMENTS REQUIREMENTS TO BE SPECIFIED BY THE ENGINEER

2

3

DEFINITIONS

2

4

REQUIREMENTS

2

4.1 4.2 4.3 4.4 4.5 4.6

SUPPORTING STEELWORK IDLERS PULLEYS T AKE -UPS CHUTES A ND SKIRTS B ELT CLEANERS

2 5 6 7 8 8

5

QUALITY QUAL ITY ASSURANCE ASSURA NCE PROVISIONS

9

6

TESTS AND INSPECTIONS

9

 APPENDIX A: RELATED RELA TED DOCUMENTS DOCUMENTS

10

 APPENDIX B: RECORD OF AMENDMENTS AMENDMENTS

10

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 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

This document supersedes AAC Specification 373005 Rev 2

1

SCOPE This specification details the tolerances to be observed when erecting conveyor belt systems and accessories.

2

TECHNICAL REQUIREMENTS REQUIREMENTS TO BE SPECIFIED BY THE ENGINEER The following information shall be specified in all tenders, contracts or orders: 

3

Reference number, title, date and issue of this specification

DEFINITIONS For the purposes of this specification the following definitions shall apply: DEAD LOAD

:

The self weight of a structure excluding all installed equipment and machinery.

The following terms are defined in the General Conditions of Contract: 

4

Anglo American, Approved, Company, Contractor, Engineer

REQUIREMENTS  All tolerances stated in this specification are for the dimensions detailed on the relevant drawings.

4.1

SUPPORTING STEELWORK

4.1. 4.1.1 1

In plan view, the idler mating bolt holes holes shall align with each other within ± 5.0mm longitudinally and within ± 2.0mm laterally (See Figure 1)

  m   m    0  .    5    ±

   h   c    t    i    P

± 2.0mm

FIGURE 1

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4.1.2 4.1.2

 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

The str ingers shall not deviate laterally from the centreline by more than ± 3.0mm in any 3m length and by more than 25.0mm over the full length of the conveyor stringers (See Figure 2)

C.L Conveyor

± 3.0mm over any 3.0m length ± 25.0mm over all stringers

FIGURE 2

4.1. 4.1.3 3

The vertical misalignment at the stringer joints shall not be greater than 3.0mm neglecting dead load deflection (See Figure 3)

  x   a   m   m   m    0  .    3

Stringer

FIGURE 3

4.1. 4.1.4 4

In addition, the difference in levels levels between between opposit e string ers (super-ele (super-elevation) vation) shall be as follows (See Figure 4): 

not greater than 1/600th of the dimension over the stringers for fixed form idlers



not greater than 1/300th of the dimension over the stringers for link suspended idlers.

 AA_SPEC_373005.doc  AA_SPEC_373005.doc

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 Anglo Technical accepts no liability for any damage whatsoever that may result from the use of this material or the information contained therein, irrespective of the cause and quantum thereof.

 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0

  r   o    0    0    6    /    W

COPYRIGHT

   0    0    3    /    W

Dimension over stringers W

FIGURE 4

4.1.5 4.1.5

Overland Syst ems

4.1.5.1 Where the stringer modules in an overland system are subject to undulating ground conditions, (See figure 5) the total difference in the slope between two adjacent modules, irrespective of the gap between the stringer modules, shall not exceed 3° (± 55 : 1000), with the radius limitations as stipulated below. 4.1.5.2 The radius of the belt catenary curve, formed by the difference in slope between two adjacent modules, shall not cause the belt to lift out of the idlers, in the concave case, nor cause a convex radius smaller than the minimum determined for the particular conveyor belt tensions.

3°

3°

FIGURE 5

4.1.5.3 The alignment of adjacent idler modules shall be such that the overall loading loading on an individual idler roll or idler set, accounting for any vertical misalignment and including the loads derived from the belt mass and material linear loading at the design capacity for the conveyor system, shall be limited to a value such that the idler L10h bearing life shall be not less than 40 000 hours. In addition, the idler shaft deflection shall remain within the limits of bearing misalignment, including manufacturing tolerances, as stipulated by the bearing manufacturer.

 AA_SPEC_373005.doc  AA_SPEC_373005.doc

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 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

4.2

IDLERS

4.2. 4.2.1 1

The maximum vertical vertical misalignment between between any two adjacent adjacent idlers shall be 1mm (See Figure 6)   m   m  x    0  .   a    1   m

Pitch

Pitch FIGURE 6

4.2. 4.2.2 2

The maximum angular misalignment of any idler shall be 0.5 (See Figure 7)

   h   c    t    i    P

  x   a    °    5  .    0

FIGURE 7

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 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

4.3

PULLEYS

4.3. 4.3.1 1

The angular misalignment of the pulley in relation to the belt centreline shall not exceed 1 in 1000 (0 3' 26")

4.3. 4.3.2 2

The angular misalignment of the pulley in relation to the horizontal centreline centreline shall not exceed 1 in 1000 (0 3' 26") See Figure 8.

0°-3’-26”  max

 A

 A

PLAN VIEW

0°-3’-26”  max

VIEW A - A FIGURE 8

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 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

4.4

T AKE -UPS

4.4. 4.4.1 1

The misalignment of pulleys on manual manual taketake-ups ups or on carriages carriages shall comply with the requirements of Clause 4.3

4.4. 4.4.2 2

Carriages Carriages shall not show any any torsional displacement and all wheels of horizontally horizontally mounted c arriages arriages shall be in contact with the rail under the dead load condition.

4.4.3 4.4.3

The greater of L1 and L2 shall not exceed the lesser by more than 0.2% of the wheel gauge (See Figure 9)

L1

  e   g   u   a   g    l   e   e    h    W

L2

Wheel Base FIGURE 9

4.4.4 4.4.4

The maximu m deviati on fro m the wh eel gauge shall not be greater than ± 2.0mm and the maximum deviation of the rails and upper guides (if fitted) shall not be greater than ± 1.0mm in both the horizontal and vertical planes. (See Figure 10) ±1.0mm

±2.0mm

  m   m    0  .    1    ±

FIGURE 10

4.4.5 4.4.5

The bot tom rail at the joi nts shall not deviate vertically and horizontally by more than 0.5mm.

4.4.6 4.4.6

The rails and wheel treads shall be free from imperfections and weld spatter.

4.4. 4.4.7 7

The maximum deviation in straightness of rails shall be 1.0mm in any 1.0m length (See Figure 11)

 AA_SPEC_373005.doc  AA_SPEC_373005.doc

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 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

1000mm

  x   a   m   m   m    0  .    1 FIGURE 11

4.5

CHUTES A ND SKIRTS

4.5.1 4.5.1

When fit ted, chu tes and ski rts shall be fitted so that the deviation from the centreline of the conveyor is not greater than ± 1.0mm in any 1.0m length (See Figure 12)

4.5.2

Skirts shall be clear of the belt.

4.6

B ELT CLEANERS

4.6.1 4.6.1

The framewor k of belt scr apers shall be installed at 90 to the centreline of the conveyor belt within a maximum deviation of 1.

4.6. 4.6.2 2

Where Where singl e return strand plough scrapers are fitted, the return strand plough shall be adequately supported by means of suitably spaced flat idlers arranged so that they can be adjusted to compensate for the detraining effect of the single plough.

4.6.3 4.6.3

Where rappers and and squeezers squeezers are used the alignm ent shall comply with the requirements of Clause 4.3. 1:1000 (0°-3’-26”)

FIGURE 12

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5

 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

QUALITY QUAL ITY ASSURANCE ASSURA NCE PROVISIONS The requirements of AA STD 100 shall apply.

6

TESTS AND INSPECTIONS Conveyor systems and supporting steelwork shall be inspected for compliance with this specification in accordance with the Contractor's Approved procedures.  A certificate of compliance with this specification, signed and dated by the Contractor, shall be submitted to the Engineer.

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 Anglo Technical accepts no liability for any damage whatsoever that may result from the use of this material or the information contained therein, irrespective of the cause and quantum thereof.

 AA SPECIFICATION

373005

INSTALLATION INSTALLA TION TOLERANCES TOLERANCES FOR BELT CONVEYORS AND STRUCTURES STRUCTURES

ISSUE 0 COPYRIGHT

 APPENDIX A : REL ATED DOCUMENTS  AA SPEC 373005 Installation Tolerances Tolerances for Belt Conveyors and Structures

The latest issue of the following documents is deemed to form part of this specification:  AA STD 100 100

:

Quality Requirements Requirements for Suppliers of Critical Equipment

 APPENDIX B : RECORD OF A MENDMENTS Issue 0

:

New documents based on AAC Specification 373005 Rev 2 with general updates (P Nel; November 2009)

 AA_SPEC_373005.doc  AA_SPEC_373005.doc

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