Stainless steel forgings
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The standards for forgings used in the manufacture of stainless steel pipe fittings are GB/T 1220 and NB/T 47010. What are the differences between these two standards? Which standard should be chosen? The original standard for NB/T 47010 was JB 4728-1994; now, have all the previous mechanical industry standards been replaced by those issued by the Energy Administration? Please advise, thank you!
NB/T47010-2017
GB/T 1220 clearly refers to stainless steel bars. . .
Yes, but this standard is the forging standard specified by GB/T 14383 for forged threaded fittings and socket-welded fittings. Please advise; thank you!
NB/T 47010–2017 replaces NB/T 47010—2010 \"Forgings of stainless steel and heat-resistant steel for pressure equipment\", and incorporates the relevant provisions of JB/T 9626—1999 \"Technical requirements for boiler forgings\".
It’s generally better to refer to the new standards