QW-202.6 Tube‐to‐Tubesheet Qualification을 확인하시면, Tube‐to‐Tubesheet 용접의 절차 검정 방법의 3가지 방법에 대해 어떻게 수행이 되어야 하는 지 제시하고 있습니다. 질문하신 분의 경우 QW-202.6 (c)항에 해당되므로 QW-288의 변수는 적용할 필요가 없습니다. QW-193 및 QW-288은 QW-202.6 (b)항이 요구되는 경우이며, 이 경우는 다른 코드인 ASME Section III 또는 VIII에서 Tube‐to‐tubesheet demonstration mockup qualification tests를 요구할 때만 적용을 받습니다. Tube‐to‐Tubesheet Qualification에 대한 요건이 ASME Section IX의 여러 항목에 흩어져 있으므로 상세하게 검토하시면 명확할 것으로 판단됩니다. (아래 참조) QW-202.6 Tube‐to‐Tubesheet Qualification. When the applicable Code Section requires the use of QW-193 for tube‐to‐tubesheet demonstration mockup qualification tests, QW-193.1 shall apply. If specific qualification test requirements are not specified by the applicable Code Section, tube‐to‐tubesheet welds shall be qualified with one of the following methods: (a) groove welds per the requirements of QW-202.2 and QW-202.4 (b) a demonstration mockup per the requirements of QW-193.1 (c) fillet welds per the requirements of QW-202.2(c) (for nonpressure retaining tube‐to‐tubesheet welds only) QW-202.2 Groove and Fillet Welds (c) Qualification for Fillet Welds. WPS qualification for fillet welds may be made on groove‐weld test coupons using test specimens specified in (a) or (b). Fillet‐weld procedures so qualified may be used for welding all thicknesses of base metal for all sizes of fillet welds, and all diameters of pipe or tube in accordance with Table QW-451.4. Nonpressure‐retaining fillet welds, as defined in other Sections of the Code, may as an alternate be qualified with fillet welds only. Tests shall be made in accordance with QW-180. Limits of qualification shall be in accordance with Table QW-451.3.

[글자가 깨진 부분이 있어 재 등록 합니다.] QW-202.6 Tube to Tubesheet Qualification을 확인하시면, Tube to Tubesheet 용접의 절차 검정 방법의 3가지 방법에 대해 어떻게 수행이 되어야 하는 지 제시하고 있습니다. 질문하신 분의 경우 QW-202.6 (c)항에 해당되므로 QW-288의 변수는 적용할 필요가 없습니다. QW-193 및 QW-288은 QW-202.6 (b)항이 요구되는 경우이며, 이 경우는 다른 코드인 ASME Section III 또는 VIII에서 Tube to tubesheet demonstration mockup qualification tests를 요구할 때만 적용을 받습니다. Tube to tubesheet Qualification에 대한 요건이 ASME Section IX의 여러 항목에 흩어져 있으므로 상세하게 검토하시면 명확할 것으로 판단됩니다. (아래 참조) QW-202.6 Tube to tubesheet Qualification. When the applicable Code Section requires the use of QW-193 for tube to tubesheet demonstration mockup qualification tests, QW-193.1 shall apply. If specific qualification test requirements are not specified by the applicable Code Section, tube to tubesheet welds shall be qualified with one of the following methods: (a) groove welds per the requirements of QW-202.2 and QW-202.4 (b) a demonstration mockup per the requirements of QW-193.1 (c) fillet welds per the requirements of QW-202.2(c) (for nonpressure retaining tube to tubesheet welds only) QW-202.2 Groove and Fillet Welds (c) Qualification for Fillet Welds. WPS qualification for fillet welds may be made on groove weld test coupons using test specimens specified in (a) or (b). Fillet weld procedures so qualified may be used for welding all thicknesses of base metal for all sizes of fillet welds, and all diameters of pipe or tube in accordance with Table QW-451.4. Nonpressure retaining fillet welds, as defined in other Sections of the Code, may as an alternate be qualified with fillet welds only. Tests shall be made in accordance with QW-180. Limits of qualification shall be in accordance with Table QW-451.3.

[상기 답변과 연결되는 코드 조항입니다.] QW-193 TUBE TO TUBESHEET TESTS When the applicable Code Section requires the use of this paragraph for tube to tubesheet demonstration mockup qualification, QW-193.1 through QW-193.1.3 shall apply. QW-193.1 Procedure Qualification Specimens. Ten mockup welds are required to qualify each procedure. The mockup assembly shall essentially duplicate the tube hole configuration and tube to tubesheet joint design within the limits of the essential variables of QW-288. The thickness of the tubesheet in the mockup test assembly shall be at least as thick as the production tubesheet, except it is not required to be thicker than 2 in. (50 mm). The cladding may be represented by the base material of essentially equivalent chemical composition to the cladding composition. The mockup welds shall be submitted to the following tests sequentially and must meet the applicable acceptance criteria. QW-288 TUBE TO TUBESHEET QUALIFICATION ESSENTIAL VARIABLES The following shall be considered essential variables for tube to tubesheet welding qualifications in accordance with QW-193.