焊工技能評定程序（英文）_secret

1、Welder,s Performance Qualification Test Procedure 焊工技能評定程序PREPARED BY編 制CHECKED BY審 核APPROVED BY批 準(zhǔn)DATE日 期 0Rev.修訂號Date日期Description更改說明Signature簽字Checked By校核1. Scope1.1 The procedure is applied to the qualification of welders performance for P311 project of AA.1.2 This procedure is prepared accord

2、ing to the requirement in section 7.3 of API 650, as well as the Part IX of ASME.2. WeldersWelders participating performance qualification must be skilled workers with many years of experience on tank welding. 3. Contents of Qualification 3.1 Basis: ASME : Part QW, Chapter III; 3.2 Position: for Shi

3、elding Metal Arc Welding (SMAW), 2G (horizontal welding), 3G (vertical welding) and 4G (back welding) will be tested;3.3 For submerged arc welding (SAW), 2G (horizontal welding) welding position will be tested;3.4 For Tungsten argon arc welding and shielding metal arc welding of tube, 6G welding pos

4、ition (the tube is fixed in 45.) will be tested;3.5 For FCAW, the 3G (vertical welding) welding position will be tested;3.6 The welders qualification shall be carried out after the welding process qualification is approved. 4. Approval CriteriaAfter the visual inspection on examination test piece is

5、 acceptable, is must be detected by radio graph. The test piece to be detected shall be 152mm (6in) at least. For tubes, the welding circumference shall be detected. Radio graphic detection shall meet the requirement specified in ASME IX QW-191.2.2, that is:4.1Linear defect:4.1.1 Any type of cracks

6、or poor penetration and lack of fusion;4.l.2 Extending length of slag inclusion is over:a.When the thickness 9.6mm (3/8in), with a length of 3.2mm (1/8in)b. When the thickness 9.657mm (3/82 1/4in), the length of slag is 1/3t。4.1.3 The total accumulative length of linear slag gangs shall not be over

7、1t every 12t (thickness of test piece) unless the distance of continuous defect is over 6L (L means the length of the longest defect in slag gangs). 4.2 Round defect4.2.1 Maximum allowable size is 20%t or 3.2mm (1/8in), the smaller one shall be chosen;4.2.2 For base metal with its thickness less tha

8、n 3.2mm (1/8in), the biggest acceptable round cracks shall not be over 12; if it is shorter than 152mm, the cracks shall be reduced in portion accordingly;4.2.3 For the welds with its thickness of base metal 3.2mm (1/8in), the diagram in Appendix I shows the biggest acceptable round cracks discovere

9、d by detection. If the crack is less than 0.8mm (1/32in), it can be neglected. Appendix I Indication of Round Defects(see QW-192.2)Typical allowable number and size with the length of weld (152mm), thickness 1/4in (6mm) 1/2in (13mm)Typical allowable number and size with the length of weld (152mm), t

10、hickness 1/8in (3.2mm) 1/4in (6mm)Typical allowable number and size with the length of weld 6in (152mm), thickness above 1in Typical allowable number and size with the length of weld 6in (152mm), thickness 1/2in (13mm) 1in (25mm)Appendix II Process Data for Welders Examination Welding processSAW Dat

11、e:WPS No. Test piece and joint70025050+50313 15 2G Position preheatingPreheating Tem.Inter-pass Tem.Gas（GTAW） Shielding gas% Flow ratel /minBack shielding gasCurrent characterReverse Base metalCurrent DC Polarity P- NO.and Group No.andTungsten pole size mm Material and Tube dia.（mm）Welding technique

12、Filling metal Welding course Longitudinal, horizontal swing GradeCleaning before weldingBrandDiameterWelding datapass filler metal current voltage speed diameter (mm) Remark: Welding processSMAW Date:WPS No. Test piece and joint20025050+50313 15 2G Position preheatingPreheating Tem. Indoor Temperatu

13、reInter-pass Tem. 250 MAXGas（GTAW） Shielding gas% Flow ratel /minBack shielding gasCurrent characterReverse Base metalCurrent DC Polarity P- NO.and Group No.andTungsten pole size mm Material A573 And A573 Tube dia.（mm）Welding techniqueFilling metal Welding course Longitudinal,horizontal swing Horizo

14、ntal GradeCleaning before Welding GrindingBrandE7016Diameter3.2；4.0Welding datapass filler metal current voltage speed diameter (mm) 1 3.2 80-12022-26 510others 4 130-170 22-26818Remark:Welding processSMAW Date:WPS No. Test piece and joint250200156050203 3G Position preheatingPreheating Tem. Indoor

15、temperatureInter-pass Tem.250 MaxGas（GTAW） Shielding gas% Flow ratel /minBack shielding gasCurrent characterReverse Base metalCurrent DC Polarity P- NO.and Group No.andTungsten pole size mm Material A573andA573 Tube dia.（mm）Welding techniqueFilling metal Welding course Longitudinal, horizontal swing

16、 Horizontal GradeCleaning before weldingGrindingBrandE7016Diameter3.2；4.0Welding datapass filler metal current voltage speed diameter (mm) 1 3.2 80-12022-26 58others 4 130-170 22-26612Remark: one side weldingdouble side formationWelding processSMAW Date:WPS No. Test piece and joint250200156050203 4G

17、 Position preheatingPreheating Tem. Indoor temperatureInter-pass Tem.250 MaxGas（GTAW） Shielding gas% Flow ratel /minBack shielding gasCurrent characterReverse Base metalCurrent DC Polarity P- NO.and Group No.andTungsten pole size mm Material A573andA573 Tube dia.（mm）Welding techniqueFilling metal SM

18、AW Welding course Longitudinal, horizontal swing Horizontal GradeCleaning before weldingGrindingBrandE7016Diameter3.2；4.0Welding datapass filler metal current voltage speed diameter (mm) 1 3.2 80-12022-26 58others 4 130-170 22-26612Remark: one side weldingdouble side formation Welding processGTAW +S

19、MAW Date:WPS No. Test piece and joint2” 125 1255.56050123 6G Position preheatingPreheating Tem.Inter-pass Tem.Gas（GTAW） Shielding gas% Flow ratel /minBack shielding gasCurrent characterReverse, positive for GATW Base metalCurrent DC Polarity P- NO.and Group No.andTungsten pole size mm Material and Tube dia.（mm）Welding techniqueFilling metal GATW Welding course SMAWLongitudinal, horizontal swing GradeCleaning before weldingBrandDiameterWelding datapass filler