【正文】 ultilayer passes or doublesidegroove butt joint welding on one joint, result of spot check on one place can stand for quality of everywhere of the joint. 抽樣檢驗的位置的確定： The location of the spot check is defined by:焊縫級別的選擇應(yīng)考慮以下因素：Design office will select the weld class according to the contract and internal standard of TAH, in the absence of such document, to the following criteria: TA015000 A2/14All other welds subjected to small loadings. 焊縫級別的選擇/ Choice of weld class根據(jù)合同文件或公司焊縫級別標準由設(shè)計部門確定。For all welds of different classes, final inspection should be carried out after heat treatment unless otherwise specified on drawing. 除非在合同中另有說明，抽樣檢驗必須包括所有節(jié)點，且檢驗長度至少為每個焊工或 焊接操作工所焊焊縫的10%，當兩個或兩個以上的焊工或焊接操作工在一個接頭上分別施焊 多層焊道、或雙面對接接頭的兩面時，一處抽樣檢驗可代表所有焊工或焊接操作工的焊接工作質(zhì)量。 If there are defects on the groove which need to be repaired in accordance with the rules of weld requirement of paragraph 8.TA015000 A6/14表2 / table2檢驗要求Inspection焊縫級別/ Class123尺寸/ Dimensions坡口角度a公差Tolerance of groove angle (a)177。 t/20bmax.=3b163。K163。For some welds subjected to high load, design office should specify on drawing (for example: k=0). T型接頭(見表5)/ Tjoints (see table 5)TA015000 A9/14t3mmt/103mm163。 for butt joint weld, t=the smaller thickness。For aggregate length of indications of 12t, if sum of diameters of each indication is less than t, round indications with linear array is qualified. See ASME VIII Appendix 4.(5) 相鄰圓形顯示之間的距離不是決定驗收或拒收的因素，但對單個顯示或各組線狀排列的顯示距離的要求除外。 for butt joint weld, t=the smaller thickness。Linear indication is indication whose length is more than 3 times of width. (3) 圓形顯示是指長度等于或小于寬度三倍的圓形或橢圓形顯示。The symbol of the specified class of weld is to be shown by the letter 1,2 3 or 4 inside a triangle, and all general information on the weld is shown in righthand lower corner of drawing. 所有焊縫是同一級別時，應(yīng)在圖紙的技術(shù)要求中標明。Groove penetration will be made according to welding process used, for example, for SMAW (shielded metalare manual welding).The root face size must be shown on the drawing, for the important weld will not show subsequent,these welds will be back gouged。焊完后，應(yīng)進行焊縫級別要求的檢驗，并必須用發(fā)現(xiàn)此缺陷的檢驗方法進行檢驗。 All inspected surfaces ,there is no 4 or more round marks aligned and separated by at least (from border to border)that should be repaires.(4) 缺陷的磁痕可能大于引起磁痕的缺陷。Defects such as cracks, lack of fusion, and inplete penetration are considered unacceptable whatever their length may be. (3) 如果顯示超過參考基準的振幅，其長度超過下列范圍的其它缺陷是不合格的：Defects are unacceptable if their amplitude is greater than the reference level and if their length exceeds the following values: t19mm 6mm 19mm163。50 t/3 with max=6。t163。g/5s163。 t/10+1c max.=4c 163。NDT inspection shall be done at manufacturer site. After receipt, shall take receipt inspection by design requirement at TAH.173。If there is no special requirement on design the scope of PTor MT inspect is 10% of length of weld. 對于角焊縫 ，在熱處理之前先做著色探傷檢驗。One weldment can consist of welds of different classes.一條焊縫在其長度或厚度上可以包括不同的級別(中部1/3處，外部1/3處)，設(shè)計應(yīng)在 圖紙上標明不同的部分。Main welds on workpiece conforming to safety regulations, but less stringent than class 1. 10% RT or UT should be done on welds of this class. Identification of defects will increase percentage of examination automatically. Inspection condition《焊接手冊》規(guī)定了部分重要件的相關(guān)焊接接頭的條件，并規(guī)定了其選則的等級，位置，準備及焊接。Cost: an important consideration when choosing the weld class Inspection department of TAH in the case of inspections required by TAH. 當發(fā)現(xiàn)缺陷超過規(guī)定數(shù)值時，在缺陷的兩側(cè)進行同樣長度的檢驗。 t/4 Length 4dRoughness Ra=12,5mm；Length of required taper m which may include the width of the weld.斜面和坡口面Bevel and groove切割缺陷Cutting defects必須由合格的焊工修復(fù)。 t/10+1c max.=4c 163。20m1163。Indications of the following strip type are unacceptable, and should be repaired according to 223。顯示可能有焊縫 中的任何缺陷產(chǎn)生，例如：氣孔、夾雜或加鎢。在長度小于150mm的焊縫 上，允許顯示的數(shù)量應(yīng)成比例的減少。When magnetic particle detain on workpiece, there will be a mark, but it39。All inspected surfaces ,there is no 4 or more round marks aligned and separatet by at least (from border