Some applicable repair welding approaches and alternatives to postweld heat treatment (PWHT) and the ASME PCC-2 Articles in which they are described are listed in Table 5, along with some additional limitations and considerations. (b) Sleeve repair and partial patch repair methods (see Table 5) are normally applied temporarily and are not recommended for periods beyond the next upcoming shutdown or outage without appropriate nondestructive examination (NDE) and applicable fitness-for- service assessment.ģ.5 RepaIr Welding Methods Applicable to Cr-Mo Vessels (a) The selection of weld repair method should be based on the reliability of the repaired area considering the future operation period, as shown in Fig. ASME PCC-2S-2015 pdf free download.Supplement to ASME PCC-2-2015 Repair of Pressure Equipment and Piping.įigure 2 shows examples of damage that can occur in Cr-Mo pressure vessels with or without stainless steel cladding or weld overlay The examples are typical of high-temperature, high-pressure (HTHP) pressure vessels in refining service.ģ.4 Development of Weld Repair Procedures
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