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DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

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<strong>DOE</strong>-<strong>STD</strong>-<strong>1090</strong>-<strong>96</strong> (Rev-l)13.4 NONDESTRUCTIVE TESTING (NDT) _13.4.1 NDT Requirementsa. For crane <strong>and</strong> hoist hooks of 10-ton ratedcapacity or greater that are assigned to heavy orsevere service, a qualified inspector shall performan NDT at the following intervals:1. Heavy service: annually.2. Severe service: semiannually.b. A designated person or a qualified inspectorshall perform an NDT for other hooks whendeemed necessary for site-specific reasons.c. Ifvisual examination reveals a surfaceintersecting discontinuity (Le., stress or fatiguecracks), a twist, increased throat opening, or anyother defect, an NDT shall be performed toevaluate the hook further, regardless ofits ratedcapacity or service classification.13.4.2 NOT RecordsDated <strong>and</strong> signed NDT records, traceable to thehook by a serial number or other identifier, shallbe kept on ftle as long as the hook remains inservice <strong>and</strong> shall be readily available to appointedpersonnel.13.4.3 NDT Methodsa. Use magnetic-particle testing orliquid-penetrant testing methods to inspect forsurface intersecting discontinuities.b. A qualified inspector or designated personshall perform NDTs in accordance with thefollowing ASTM st<strong>and</strong>ards:1. ASTM E-709.2. ASTME-165.c. For magnetic-particle testing, a coil, yoke, orwet technique should be used to eliminate thepossibility ofprod burns or arc strikes.d. Perform an NOT with the hook in placeunless conditions indicate that disassembly forthread or shank inspection is necessary.13.4.4 Acceptance CriteriaA designated person shall document <strong>and</strong> resolvethe following relevant indications:a. Arc strikes (welding or electrical).b. Surface intersecting discontinuities 0.25 in.long or longer.13.4.5 Discontinuity Removala. Two directions ofdiscontinuity, "P" <strong>and</strong>"T," are shown on Figures 13-1 <strong>and</strong> 13-2.Discontinuity "P" parallels the contour ofthehook, is considered nonserious, <strong>and</strong> does notrequire removal. Discontinuity "T," on the otherh<strong>and</strong>, is transverse to the contour of the hook <strong>and</strong>is more serious; when occurring in zones B, C, orD, discontinuity "T' may reduce the longevity ofthe hook.b. Discontinuities may be removed by grindinglongitudinally following the contour ofthe hook toproduce a smooth, gently undulating surface. Inzones B <strong>and</strong> D, such grinding shall not reduce theoriginal hook dimension by more than 10 percent.Such a reduction will not affect the working loadlimit rating or the ultimate load rating ofthe hook.In zone C, grinding shall not reduce the originaldimension by more than 5 percent.c. Under normal <strong>and</strong> proper application, zoneA is an unstressed zone. Therefore, it is notrequired that discontinuities in that zone beground out.d. The hook shall be reexamined by performingan NOT after grinding to verify removal ofrelevant discontinuities.Chapter 13Load Hooks 13-6

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