1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 53.020.20Code of practice for safe use of cranes Part 14: Side boom pipelayersBRITISH STANDARDB
2、S 7121-14:2005BS 7121-14:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 7 October 2005 BSI 7 October 2005The following BSI references relate to the work on this British Standard:Committee reference MHE/3Draft for comment 02/710784 DCISBN
3、 0 580 46753 8Construction Plant-hire AssociationHSE Health and Safety ExecutiveInstitution of Occupational Safety and HealthInstitution of Structural EngineersLow Power Radio AssociationSafety Assessment FederationCo-opted MembersAmendments issued since publicationAmd. No. Date CommentsCommittees r
4、esponsible for this British StandardThe preparation of this British Standard was entrusted by Technical Committee, MHE/3, Cranes and derricks, to Subcommittee MHE/3/11, Crane safety and testing, upon which the following bodies were represented:Association of Lorry-Loader Manufacturers and ImportersC
5、EA Construction Equipment AssociationConstruction ConfederationBS 7121-14:2005 BSI 7 October 2005ContentsPageCommittees responsible Inside front coverForeword ii1Scope 12 Normative references 13 Terms and definitions 14 Lift capacity determination procedure 45 Hoist mechanism 56 Rated and radius cap
6、acity indicators 67 Marking of pipelayers 78 Thorough examination of pipelayers 79Testing 810 Management of lifting operations 1011 Selection and duties of appointed persons 1212 Selection and minimum attributes of personnel 1313 Duties of personnel 1514 Selection of pipelayers 1515 Safety 15Annex A
7、 (informative) Lifting capacity chart 17Annex B (informative) Example duty chart for 583(H) pipelayer 17Annex C (informative) Report of thorough examination of pipelayers 18Annex D (informative) Certificate of test 19Annex E (informative) Pipe lengths and mass table 19Annex F (normative) Operator da
8、ily and weekly checks 20Annex G (normative) Signals 21Annex H (normative) Calculations for complex lifts 22Bibliography 23Figure 1 Dimension R1 for a crawler machine 2Figure A.1 Lifting capacity chart for caterpillar 583 pipelayer fitted with 28 foot boom 17Figure G.1 Hand signals 21Table E.1 Mass p
9、er 12 m length of bare, painted or resin coated steel pipe 19Table F.1 Operator maintenance checks 20iBS 7121-14:2005iiintended to be used in conjunction with other parts of BS 7121 to ensure, so far as is reasonably practicable, that lifting operations are carried out safely.The Lifting Operations
10、and Lifting Equipment Regulations (LOLER) 1 and the Provision and Use of Work Equipment Regulations (PUWER) 2 came into force on 5 December 1998. Details of the Regulations, an Approved Code of Practice plus HSE guidance can be found in the HSE books Safe use of lifting equipment 3 and Safe use of w
11、ork equipment 4.BS 7121-1 provides general recommendations for crane types not covered in an additional part of BS 7121. BS 7121-2 covers in-service inspection, thorough examination and, where appropriate, testing for the safe use of all types of crane. This Part covers the safe use of side boom pip
12、elayers. Subsequent parts deal with the specific crane types as follows: Part 3: Mobile cranes; Part 4: Lorry loaders; Part 5: Tower cranes; Part 6: Derrick cranes; Part 7: Overhead/under-hung travelling and goliath cranes; Part 8: High pedestal and portal jib dockside cranes; Part 9: Container hand
13、ling cranes; Part 10: Rail mounted cranes; Part 11: Offshore cranes; Part 12: Recovery vehicles and equipment; Part 13: Hydraulic gantry lifting systems.When all parts of BS 7121 have been published, CP 3010 will be withdrawn and BS 5744 will be revised to cover manually operated and light cranes on
14、ly.The Health and Safety Executive (HSE) commends the use of this British Standard to those who have duties under the Health and Safety at Work etc. Act 1974 5. This standard was drawn up with the participation of HSE representatives and will be referred to in relevant HSE publications.The BS 7121 s
15、eries has been accepted as representing the consensus of practical experience for safety on cranes.As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it were a specification and particular care should be taken to ensure that cla
16、ims of compliance are not misleading.It has been assumed in the drafting of this British Standard that the execution of its provisions is entrusted to appropriately qualified and competent people.This publication does not purport to include all the necessary provisions of a contract. Users are respo
17、nsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Attention is drawn to the following statutory regulations:The Lifting Operations and Lifting Equipment Regulations (LOLER) 1;The Provision and Use of Work Equipment Regulat
18、ions (PUWER) 2;Health and Safety at Work etc. Act 1974 5;The Supply of Machinery (Safety) Regulations 6;The Management of Health, Safety and Welfare Regulations 9;The Personal Protective Equipment at Work Regulations 10.Summary of pagesThis document comprises a front cover, an inside front cover, pa
19、ges i and ii, pages 1 to 23 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.ForewordThis part of BS 7121 has been prepared by Subcommittee MHE/3/11. It is BSI 7 October 2005BS 7121-14:20051 ScopeThis part of BS 7121 gives recommendatio
20、ns for the safe installation and use of pipelayers. Subjects covered include selection of pipelayers, planning the lifting operation, thorough examination, operation, as well as safety measures to be taken during the execution of these functions. It also covers the selection and training of personne
21、l involved in the safe installation and use of pipelayers.In addition a uniform method of calculating, and a test method for validating rated lift capacity as presented in commercial literature for pipelayers is included. The rated lift capacity considers hoist mechanism limits, tipping loads and ro
22、pe factors.This British Standard applies to all pipelayers when used in lifting applications as defined in BS EN ISO 6165 and BS 6914-5.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applie
23、s. For undated references, the latest edition of the referenced document (including any amendments) applies.BS 6911-7, Testing earth moving machinery Part 7: Specification for units of measurement and tolerances ISO 9248.BS 6914-5, Terminology (including definitions of dimensions and symbols) for ea
24、rth-moving machinery Part 5: Glossary for pipelayers.BS EN 473:2000, Non-destructive testing Qualification and certification of NDT personnel General principles.BS EN ISO 6165, Earth-moving machinery Basic types Vocabulary.3 Terms and definitionsFor the purposes of this British Standard, the followi
25、ng terms and definitions apply.3.1 employing organizationperson or organization who requires a lifting operation to be carried out and is responsible for the safe use of the pipelayer3.2 pipelayerself-propelled crawler machine which incorporates pipe laying equipment with mainframe, load hoist mecha
26、nism, vertically pivotable side boom and counterweight, and is primarily designed to handle and lay pipes3.3 side boomtractor equipment, including boom, load hoist mechanisms and a vertically pivotable side boom, added to a tractor, which is designed to handle and lay pipes and carry pipe laying equ
27、ipmentNOTE A side boom might have counterweights attached.3.4 base machinepipelayer including undercarriage, without equipment or attachments, as described by the manufacturers specification3.5 equipmentset of components, boom and counterweights mounted onto a base machine to fulfil the primary desi
28、gn BSI 7 October 20051function of a pipelayerBS 7121-14:20053.6 boomstructural member that supports a load3.7 counterweightadditional removable mass and its support which is added to increase the stability of a pipelayer3.7.1 adjustable counterweightportion of the counterweight that is movable3.8 at
29、tachmentassembly of components that could be mounted on the base machine, or equipment, for a specific use3.9 componentpart, or an assembly of parts, of a base machine, equipment or attachment3.10 loadexternal force acting on the pipelayer, including the mass of attaching equipment applied at the lo
30、ad hook3.11 lift point linevertical line through the centre of the load hook3.12 tipping lineouter edge of the outer track link rail on the boom side of the machine, see Figure 13.13 radiusperpendicular distance from a vertical plane passing through the outer edge of the outer track link rail, on th
31、e boom side, to a parallel vertical plane passing through the lift point, which is the load bearing surface midpoint of the hookNOTE This radius for crawler machines is indicated by dimension R1 in Figure 1.R12 BSI 7 October 2005Figure 1 Dimension R1 for a crawler machineBS 7121-14:20053.14 moment a
32、cting to overturn machineproduct of a force acting on a machine through the lift point line and the radius3.15 moment acting to resist overturn of machineproduct of the mass of the machinery and the distance from the centre of gravity to the tipping line3.16 measured balance point moment acting to o
33、verturn the machine at a specific radius that does not cause any track roller on the track opposite the boom side to lift more than 6 mm from the track link3.17 tipping loadvertical load applied at the load hook at a specific radius, which achieves the balance point3.18 ropewire rope used for the bo
34、om support or load line3.19 rope factorrope breaking strength divided by rope load3.20 draw works3.20.1 mechanical draw worksdrums and mechanical drive systems that operate the boom position and the load hoist lines3.20.2 hydraulic draw workshydraulic pumps, motors, valve lines and cylinders, that p
35、osition the boom and operate the hoist line3.21 hydraulic pressure3.21.1 working circuit pressurenominal pressure applied to the specific circuit by the hydraulic pumps3.21.2 holding circuit pressuremaximum static pressure in a specific circuit limited by a relief valve pressure that is measured at
36、a flow no greater than 10 % of rated flow3.22 lift mechanism lift capacitymaximum load that can be lifted at the load hook by a force generated by any combination of mechanical or hydraulic power to the draw works and/or hydraulic cylinder(s) at a specific draw radius without exceeding any of the fo
37、llowing limits: tipping load; hydraulic working or holding circuit pressure in any circuit; rope factor in either load or boom hoist line.NOTE Some of the possible combinations of power to the lift mechanism include:a) mechanical draw works power to the load; BSI 7 October 20053b) hydraulic draw wor
38、ks power to the load and boom hoist line;c) mechanical power to the draw works for the load hoist line and hydraulic cylinder(s) for the boom hoist line;d) hydraulic cylinders for the boom hoist line.BS 7121-14:20053.23 mechanical draw works lift capacitylift capacity obtained by applying mechanical
39、 power to the load and boom hoist draw works without exceeding tipping load or rope factor3.24 hydraulic lift capacitylift capacity obtained by applying working circuit pressure to the hydraulically actuated draw works and/or lift cylinder(s) without exceeding the holding circuit pressure in any cir
40、cuit3.25 rated lift capacitymaximum load that can be raised without exceeding the rated tipping load lift capacity NOTE The rated lift capacity is also known as “rated lift mechanism lift capacity” or the “rated rope factor lift capacity” see 4.1.4 Lift capacity determination procedure4.1 Machine pr
41、eparationAll lift capacity determinations should be made either with adjustable counterweights fully extended or with variable ballast configurations, for example ballast retracted, ballast not fitted. All lifting operation specifications tested should be shown on the test certificate and machine. S
42、ee 4.11 and 9.3.6.4.2 Tipping load testThe tipping load test is carried out for all permitted counterweights and counterweight positions. A live test weight (freely suspended load) should be used in the tipping load test.4.3 Test siteThe lift capacity determination test site should consist of a conc
43、rete, steel or equally firm surface and should be level to within 1 %. The test site should be secured, to prevent access by unauthorized persons, and of sufficient area to enable the test to be carried out without endangering personnel.4.4 Test equipmentThe following test equipment with tolerances
44、in accordance with BS 6911-7 should be available.a) Sufficient freely suspended weights. The weights should either be of known mass or a calibrated weighing device should be available to determine the mass of the weights.b) Means to measure the radius distance.4.5 Test conditionsThe test should be c
45、onducted under the control of a competent person.The pipelayer should be thoroughly examined in accordance with Clause 8 before the test to determine whether it is in a suitable condition to withstand the loads applied during testing.The manufacturers operating instructions (but not duty charts) for
46、 the pipelayer and the test equipment should be followed at all times.After load testing, a thorough examination should be undertaken by a competent person to determine whether the pipelayer has withstood testing without signs of structural change that could affect its safety, such as:a) cracking;b)
47、 permanent deformation;c) paint flaking;d) loosening of or damage to structural connections.4 BSI 7 October 2005BS 7121-14:20054.6 Test loadA test load, sufficient to cause the pipelayer to attain the measured balance point at approximately the maximum radius, should be lifted at an intermediate rad
48、ius position. With the load kept as close to the ground as possible, the pipelayer should be boomed out slowly until the measured balance point is achieved. The radius should be measured.The test should be repeated with different loads applied, to enable the radius to be measured at the balance poin
49、t for two intermediate positions and approximately the minimum radius position.4.7 Test resultsThe results of the test should be recorded and the record should also show the make, model and serial number of the pipelayer, together with the length and identification number of the boom. A graph showing the measured radius at the corresponding load should be drawn, this graph shows the maximum lift capacity. A graph should then be drawn showing 0.714 times the load at the corresp
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