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接上期附录A（规定性）各种焊接接头的检测等级见图AI～A7和表AI～A7表中关键词意义：L一扫查：用斜探头扫查纵向缺陷N一扫查：用直探头扫查T一扫查：用斜探头扫查横向缺陷P-全跨距SZW：扫查区宽度表A．1板、管对接接头表人2结构T贝征先发地3扬人式管接头表人4结构L到接头表A．
Appendix A (Prescribed) The inspection grades of various welded joints are shown in the figures AI ~ A7 and AI ~ A7. Key words meanings: L-scan: use oblique probe to scan longitudinal defect N-scan: use straight Scanning Scanning T Scanning: Scanning for Transversal Defects with Skew Probes P- Full Spacing SZW: Scanning Area Width Table A. 1 plate, pipe butt joint table 2 structure T Bei Xian starter 3 Yang pipe fittings table 4 structure L to the connector table A.