Laserfiche WebLink
ASME B31.3-2016 <br /> Table K323.3.1 Impact Testing Requirements <br /> Column A <br /> Test Pipe,Tubes, and Components Column B Column C <br /> Characteristics Made From Pipe or Tubes Other Components, Fittings, Etc. Bolts <br /> Number of tests As required by the material specification, or one test set per lot [see Note (1)],whichever is greater, except as <br /> permitted by Note (2). <br /> Location and (a) Transverse to the longitudinal (a) Transverse to the direction of (a) Bolts 5 52 mm (2 in.) nominal <br /> orientation axis,with notch parallel to maximum elongation during size made in accordance with <br /> of specimens axis. [See Note (4).] rolling or to direction of ASTM A 320 shall meet the <br /> [see Note (3)] (b) Where component size and/ major working during forging. impact requirements of that <br /> or shape does not permit Notch shall be oriented paral- specification. <br /> specimens as specified in (a) lel to direction of maximum (b) For all other bolts, longitudinal <br /> above, paras. K323.3.3(b), elongation or major working. specimens shall be taken.The <br /> h (c), and (d) apply as needed. (b) If there is no single identifi- impact values obtained shall <br /> M able axis, e.g.,for castings or meet the transverse values of <br /> d triaxial forgings, specimens Table K323.3.5. <br /> ° shall either meet the longitu- <br /> dinal values of Table <br /> h K323.3.5, or three sets of <br /> Forthogonal specimens shall <br /> be prepared, and the lowest <br /> impact values obtained from <br /> any set shall meet the trans- <br /> verse values of Table <br /> K323.3.5. <br /> (c) Where component size and/ <br /> or shape does not permit <br /> specimens as specified in (a) <br /> or(b) above, paras. <br /> K323.3.3(c) and (d) apply as <br /> needed. <br /> Test pieces Test pieces for preparation of impact specimens shall be made for each welding procedure, type of electrode, <br /> [see Note (5)] or filler metal (i.e.,AWS E-XXXX classification) and each flux to be used.All test pieces shall be subject to <br /> T heat treatment, including cooling rates and aggregate time at temperature or temperatures, essentially the <br /> a same as the heat treatment which the finished component will have received. <br /> hNumber of test (1) One test piece with a thickness T for each range of material thicknesses which can vary from '/ZTto T+ <br /> a pieces [see 6 mm ('/4 in.). <br /> Note (6)] (2) Unless otherwise specified in this Chapter[see Note (4)] or the engineering design,test pieces need not <br /> c be made from individual material lots, or from material for each job, provided welds in other certified <br /> material of the same thickness ranges and to the same specification (type and grade, not heat or lot) <br /> a have been tested as required and the records of those tests are made available. <br /> Location and (1) Weld metal impact specimens shall be taken across the weld with the notch in the weld metal. Each speci- <br /> orientation men shall be oriented so that the notch axis is normal to the surface of the material and one face of the <br /> of specimens specimen shall be within 1.5 mm (1/16 in.) of the surface of the material. <br /> (2) Heat affected zone impact specimens shall be taken across the weld and have sufficient length to locate <br /> ° the notch in the heat affected zone, after etching.The notch shall be cut approximately normal to the <br /> material surface in such a manner as to include as much heat affected zone material as possible in the <br /> resulting fracture. <br /> (3) The impact values obtained from both the weld metal and heat affected zone specimens shall be com- <br /> pared to the transverse values in Table K323.3.5 for the determination of acceptance criteria. <br />