1、ASME B30.20 INTERPRETATIONSReplies to Technical InquiriesOctober 2010 Through May 2012FOREWORDThis publication includes all of the written replies issued between the indicated dates by theSecretary, speaking for the ASME B30 Committee, Safety Standards for Cableways, Cranes,Derricks, Hoists, Hooks,
2、Jacks, and Slings, to inquiries concerning interpretations of technicalaspects of ASME B30.20, Below-The-Hook Lifting Devices.These replies are taken verbatim from the original letters except for a few typographicalcorrections and some minor editorial corrections made for the purpose of improved cla
3、rity. Insome few instances, a review of the interpretation revealed a need for corrections of a technicalnature; in these cases, a corrected interpretation follows immediately after the original reply.These interpretations were prepared in accordance with the accredited ASME procedures.ASME procedur
4、es provide for reconsideration of these interpretations when or if additionalinformation is available that the inquirer believes might affect the interpretation. Further, personsaggrieved by this interpretation may appeal to the cognizant ASME Committee or Subcommittee.ASME does not “approve,” “cert
5、ify,” “rate,” or “endorse” any item, construction, proprietarydevice, or activity.I-1ASME B30.20 INTERPRETATIONSInterpretation: 20-34Subject: ASME B30.20-2006, Para. 20-1.3.8.2Date Issued: October 12, 2010Question: What is the minimum load (applied on a lifting device in whatever manner) from whichw
6、e have to apply the load test procedure?Reply: Load testing of a Structural or Mechanical Lifting device is not a mandatory requirement.There is no minimum rated load for which a load test is recommended to be performed.Interpretation: 20-35Subject: ASME B30.20-2010, Para. 20-1.3.1, Inspection Class
7、ification Subparagraph (b)(3) PeriodicInspectionDate Issued: February 1, 2011Question (1): Would it be correct to say that an external code mark may be substituted fordated inspection reports that appear to be mandatory by this Standard in Table 1 Note (2) andin paras. 20-1.3.6 and 20-2.3.6?Reply (1
8、): Yes.Question (2): Would it be correct to say the external code mark is in addition to the datedinspection reports and is applied to the lifter for field verification to show that the dated inspectionreports have been completed?Reply (2): No.Question (3): Should “An external code mark on the lifte
9、r is an acceptable identification inlieu of records” be added or addressed in paras. 20-1.3.6 and 20-2.3.6 as being an acceptablemethod of Inspection Records?Reply (3): This will be taken as a request for revision.Question (4): Paragraph 20-2.3.1(b)(3) PeriodicInspection uses the words coded mark. S
10、hould thatbe code mark as stated in para. 20-1.3.1 Inspection Classification under (b)(3) Periodic Inspection?Reply (4): This will be taken as a request for revision.Question (5): What is the definition of an external code mark?Reply (5): This will be taken as a request for revision.Interpretation:
11、20-36Subject: ASME B30.20-2010, Section 20-0.2, Definitions General Repair and Para. 20-1.2.1,Subparagraph (c), MarkingDate Issued: February 1, 2011Question: Routine maintenance on structural and mechanical lifters involves the replacementof worn parts. Is the normal replacement of worn parts consid
12、ered a repair?Reply: Yes.I-2ASME B30.20 INTERPRETATIONSInterpretation: 20-37Subject: ASME B30.20-2010, Sections 20-0.1 and 20-0.2Date Issued: May 25, 2012Question (1): Once a BHLD (B30.20) incorporating a hook, wire rope sling, or other componentcovered by another B30 series standard has been assemb
13、led, are there any load test requirementsfor this BHLD other than those specified by B30.20, which would include a one-time load testof 125%?Reply (1): No, once components covered by another B30 volume have been incorporated intoa Below-the-Hook Lifting Device, the completed assembly is only require
14、d to meet the load testrequirements of B30.20.NOTE: B30.20, Chapter 1 for structural and mechanical lifting devices recommends a load test;it is not mandatory.Question (2): Does B30.20, Para. 20-1.3.7, Repairs require that repaired hooks comply with therequirements of B30.10?Reply (2): Yes.I-3INTENTIONALLY LEFT BLANKI-4
