Dear Experts, Good day to all. I have 2 cases which are to be shared with you for my knowledge. (1) I have qualified a WPS of 8.5 mm. Base metal Thk. of P-1 G-1 to G-2. Root Run TIG and subsequent SMAW. TIG weld deposit thk. 2.5 mm. and SMAW weld deposit thk. 6 mm. PWHT- Normalizing and Tempering with Impact test at MDMT (-45º C.) As per my opinion, as per QW-403.6- Minm. T qualified shall be 1.5 mm. & Max. will be 9.35 mm. as per QW-407.4. As per QW 451.1 qualified deposited weld metal thk. range will be 2t (viz. 5 mm. for TIG and 12 mm. for SMAW.) for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct? (2) I shall have to qualify a WPS of 6 mm. Base metal Thk. (T) of P No. 8 Group 1 to itself. Complete TIG. As per my opinion, QW-202.4 (b) (1) and QW-451.1 Min Qualified T shall be 1.5 mm. and no limitation on Max. T qualified. As per QW 451.1 qualified deposited weld metal thk. range will be max. unlimited for groove welding. and for Fillet- deposited weld metal thk. range will be all fillet size. Am I correct? Please share your experience with me on urgent basis. Thanks & regards, C. R. GANDHI (Manager- Q. C.) |
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