In the NB/T47020-2012 standard, what is the thinning type for high-neck butt weld flanges?

2017-07-15View Original

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In standard NB/T47020-2012, on page 16, Figure 1, why is not the thinned shape for medium thickness specified in GB/T150.4-2011 on page 325 used when joining with cylinders? Or should a thinned version be used, retaining a 3mm thickness difference?

Reply #22017-07-15

Is it related to the stress on the flange neck? Wait for the experts to reply

Reply #32017-07-15

Without reducing the strength of the straight flange sections

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In the NB/T47020-2012 standard, what is the thinning type for high-neck butt weld flanges?

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