{"id":267199,"date":"2024-10-19T17:50:27","date_gmt":"2024-10-19T17:50:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-84382004a12010\/"},"modified":"2024-10-25T13:53:37","modified_gmt":"2024-10-25T13:53:37","slug":"bs-84382004a12010","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-84382004a12010\/","title":{"rendered":"BS 8438:2004+A1:2010"},"content":{"rendered":"

This British Standard specifies the mechanical design, dimensional requirements and methods for calculating the operating power requirements for non-mobile troughed belt conveyors incorporating carrying idlers. The standard also specifies methods for calculating the forces exerted on the belt.<\/p>\n

This standard applies to conveyors using either rubber or plastic belting, with textile reinforcement (conforming to BS 490-1), carrying loose bulk materials, having a maximum speed of 6 m\/s.<\/p>\n

This standard does not cover the safeguarding of hazard points. BS EN 620:2002 covers the safeguarding of hazard points on fixed troughed belt conveyors and BS EN 618:2002 deals with safeguarding of hazard points on fixed belt conveyors that are built into or attached to machines.<\/p>\n

This standard does not apply to the following categories:<\/p>\n

    \n
  1. \n

    underground mining conveyors;<\/p>\n<\/li>\n

  2. \n

    conveyors handling materials that do not behave as bulk solids.<\/p>\n<\/li>\n<\/ol>\n

    \n

    NOTE 1 Annex A provides guidance on the information to be supplied by the purchaser at the time of enquiry and\/order.<\/p>\n

    NOTE 2 Portable and mobile conveyors are covered in BS 4531.<\/p>\n

    NOTE 3 Belt speed in excess of 6 m\/s might require analysis of forces not considered in this specification.<\/p>\n<\/blockquote>\n

    PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
    1<\/td>\nBRITISH STANDARD <\/td>\n<\/tr>\n
    2<\/td>\nCommittees responsible for this British\ufffdStandard <\/td>\n<\/tr>\n
    3<\/td>\nContents <\/td>\n<\/tr>\n
    7<\/td>\n1 Scope
    2 Normative references
    3 Terms and definitions
    head of the conveyor
    carrying idler
    return idler
    take-up device <\/td>\n<\/tr>\n
    8<\/td>\ndriving pulley
    snub pulley
    bend pulley
    tail pulley
    take-up pulley
    delivery pulley
    drive
    power unit
    transmission
    safeguard
    regenerative conveyor
    cleaner
    overend discharge
    tripper
    shuttle conveyor <\/td>\n<\/tr>\n
    9<\/td>\nplough
    edge idlers
    sized material
    Typical troughed belt conveyor <\/td>\n<\/tr>\n
    10<\/td>\n4 Belting
    4.1 Belt width
    Belt width and belt edge clearance
    4.2 Belt capacity and speed <\/td>\n<\/tr>\n
    11<\/td>\nFactor
    Maximum lump size for given belt width
    4.3 Belt edge clearance <\/td>\n<\/tr>\n
    12<\/td>\nBelt edge clearance <\/td>\n<\/tr>\n
    13<\/td>\n5 Pulleys
    5.1 Minimum pulley face length
    Minimum pulley face length
    5.2 Pulley nominal diameter <\/td>\n<\/tr>\n
    14<\/td>\n5.3 Profile
    5.4 Minimum pulley diameter appropriate to nominal belt carcass thickness <\/td>\n<\/tr>\n
    15<\/td>\nMinimum pulley diameter appropriate to belt construction <\/td>\n<\/tr>\n
    16<\/td>\n6 Idlers and idler sets
    6.1 General
    Angle of inclination of the wing idlers for troughed carrying idler sets
    6.2 Materials
    6.3 Nominal outside diameters of idlers
    Minimum radial clearance for carrying and return idlers <\/td>\n<\/tr>\n
    17<\/td>\n6.4 Nominal idler lengths
    Nominal lengths of carrying and return idlers appropriate to belt width
    Nominal idler lengths for three-idler carrying sets, flat and vee return idlers <\/td>\n<\/tr>\n
    18<\/td>\n6.5 Arrangement of carrying idler sets
    Plan views of in-line and staggered idler sets
    Part view of in-line idler set <\/td>\n<\/tr>\n
    19<\/td>\nPart view of staggered idler set <\/td>\n<\/tr>\n
    20<\/td>\nSide elevation of wing idler with forward tilt
    Clearance between carrying idlers and supporting structure <\/td>\n<\/tr>\n
    21<\/td>\n6.6 Arrangement of return idler sets
    Single flat return idler
    Two return idlers in vee form <\/td>\n<\/tr>\n
    22<\/td>\nPlan view of vee return roller set <\/td>\n<\/tr>\n
    23<\/td>\nClearance between return idler and supporting structure
    6.7 Mounting dimensions
    Mounting dimensions of carrying and return idlers sets in common usage appropriate to belt width <\/td>\n<\/tr>\n
    24<\/td>\nMounting dimensions of carrying and return idler sets
    6.8 Design load
    6.9 Idler bearings <\/td>\n<\/tr>\n
    25<\/td>\n6.10 Belt speed and eccentricity appropriate to nominal idler outside diameter
    Nominal outside idler diameters and related belt speeds
    6.11 Pitch of idler sets <\/td>\n<\/tr>\n
    26<\/td>\nTypical pitch of idler sets with troughing angle up to 35\u00b0
    6.12 Impact rings and discs
    Impact ring for carrying idlers outside diameter <\/td>\n<\/tr>\n
    27<\/td>\nImpact ring dimensions
    Discs for return idlers outside diameter
    Disc dimensions <\/td>\n<\/tr>\n
    28<\/td>\nRecommended spacing requirements for discs on return idlers
    Recommended spacing requirements for disc type return idlers <\/td>\n<\/tr>\n
    29<\/td>\n7 Transition distances
    8 Take-up devices
    9 Driving force
    9.1 Belt conveyor motion resistances <\/td>\n<\/tr>\n
    30<\/td>\n9.2 Peripheral force ( <\/td>\n<\/tr>\n
    33<\/td>\nCoefficient <\/td>\n<\/tr>\n
    34<\/td>\nBasic selection of friction factor <\/td>\n<\/tr>\n
    35<\/td>\nAdjustment factor
    Adjustment factor <\/td>\n<\/tr>\n
    36<\/td>\nRules for calculating the secondary resistance <\/td>\n<\/tr>\n
    37<\/td>\nRules for calculating the special resistances <\/td>\n<\/tr>\n
    39<\/td>\nTensile forces exerted on the belt
    Friction coefficient factor, \u00bb, between driving pulleys and rubber belting
    Drive factor <\/td>\n<\/tr>\n
    41<\/td>\n10 Power requirements <\/td>\n<\/tr>\n
    42<\/td>\n(informative) Information to be supplied by the purchaser
    (informative) Information to be supplied by the purchaser <\/td>\n<\/tr>\n
    43<\/td>\n(informative) Illustrations of basic conveyor equipment
    (informative) Illustrations of basic conveyor equipment <\/td>\n<\/tr>\n
    44<\/td>\nTypical forms of drives <\/td>\n<\/tr>\n
    45<\/td>\nTypical forms of take-up device <\/td>\n<\/tr>\n
    46<\/td>\nTypical travelling tripper <\/td>\n<\/tr>\n
    47<\/td>\nTypical arrangement of troughed belt shuttle conveyor <\/td>\n<\/tr>\n
    48<\/td>\nTypical plough <\/td>\n<\/tr>\n
    49<\/td>\n(normative) Capacity and cross-section of a conveyor with a smooth patternless belt
    (normative) Capacity and cross-section of a conveyor with a smooth patternless belt <\/td>\n<\/tr>\n
    50<\/td>\nMaximum cross-section of the handled material, <\/td>\n<\/tr>\n
    51<\/td>\nTrough section with three carrying idlers
    Trough section with two carrying idlers
    Trough section with one carrying idler <\/td>\n<\/tr>\n
    52<\/td>\nMaximum cross-section,
    (informative) Typical values of rotating masses for carrying and return rollers and conveyor belt…
    (informative) Typical values of rotating masses for carrying and return rollers and conveyor belt… <\/td>\n<\/tr>\n
    53<\/td>\nTypical value of revolving mass of carrying and return idlers (kg\/m) <\/td>\n<\/tr>\n
    54<\/td>\nTypical conveyor belt mass
    (informative) Example of belt conveyor calculation with conveyor length in excess of 80 m
    (informative) Example of belt conveyor calculation with conveyor length in excess of 80 m
    Longitudinal section of a conveyor <\/td>\n<\/tr>\n
    60<\/td>\n(informative) Typical example of belt conveyor calculation with conveyor length less than\ufffd80\ufffdm
    (informative) Typical example of belt conveyor calculation with conveyor length less than\ufffd80\ufffdm <\/td>\n<\/tr>\n
    62<\/td>\nTabulation of belt forces (N) <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    Troughed belt conveyors. Specification<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2010<\/td>\n64<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":267203,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[841,2641],"product_tag":[],"class_list":{"0":"post-267199","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-53-040-10","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/267199","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/267203"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=267199"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=267199"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=267199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}