ABS 14 NOTICE 2-2014 GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS.pdf

1、 ABSGUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS .2011 1 GUIDE FOR NONDESTRUCTIVE INSPECTION OF HULL WELDS SEPTEMBER 2011 NOTICE NO. 2 February 2014 The following Changes become EFFECTIVE AS OF 1 JANUARY 2014. (See http:/www.eagle.org for the consolidated version of the Guide for Nondestructive

2、 Inspection of Hull Welds 2011, with all Notices and Corrigenda incorporated.) Notes - The date in the parentheses means the date that the Rule becomes effective for new construction based on the contract date for construction. (See 1-1-4/3.3 of the ABS Rules for Conditions of Classification (Part 1

3、).) APPENDIX 5 INSPECTION OF HOT-DIP GALVANIZING (2014) (Add new Appendix 5, as follows:) Materials for galvanized structures are to be fabricated and designed in accordance with industry-recommended practices. Galvanizing procedures and/or process are to be in accordance with ASTM A143, A153, A384,

4、 A385, BCSA 40/05, and/or other hot-dip galvanizing standards. The following are to be considered in the development of galvanizing procedures and processes: High-strength steels with yields above 355 MPa (51 ksi) Adequate venting and draining Double-dipping practices are not permitted, except in ca

5、se of galvanizing tank size limitations Trace elements in base metal and low Silicon weld consumables No flame cut edges Weld surface appearance free from undercuts, notches, etc. Inspection before and after hot-dip galvanizing Strain age embrittlement of cold-formed sections Abrupt changes in cross

6、 section Maximum CE of 0.44% (see CEZ calculation below) based upon the Product Analysis or if Ladle Analysis then maximum specified chemistry values should be applied in the calculation. Steel which is produced from scrap may contain trace elements that influence the susceptibility to hot dip galvanizing cracking. CEZ = C + Si/17 + Mn/7.5 + Cu/13 + Ni/17 + Cr/4.5 + Mo/3 + V/1.5 + Nb/2 + Ti/4.5 + 420B