If a lower strength material is used, either in the pad or in the nozzle, then the area taken as reinforcement must be decreased proportionately by the ratio of the stress intensity values of the two materials. If a higher strength material is used, either in the pad or in the nozzle neck, no additional credit may be taken for the higher strength.ī. It is advisable but not mandatory for reinforcing pad material to be the same as the vessel material :Ī. For nozzle openings greater than the limits of Guideline lb, reinforcement shall be in accordance with Para. diameter-1/3 the vessel diameter but not to exceed 40 in.Ĭ. diameter and less-1/2 the vessel diameter but not to exceed 20 in. pipe size and smaller in vessel walls greater than 3/8 in.ī. pipe size and smaller in vessel walls 3/8-in. No reinforcement other than that inherent in the construction is required for nozzles : This is not an attempt to cover every possibility nor is it to become a substitute for using the Code.Ī. The following are only guidelines based on Section VIII, Division 1 of the ASME Code.
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