HG/T 20634 bolt problems and help questions
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Fasteners for low-temperature systems are generally made of 304 material. In the HG/T 20634 standard, the service temperature of 304 nuts is >-20~+800℃, and the service temperature of studs is -196~+800℃. Why are the specified service temperatures of bolts and nuts different? Thank you for your advice!
Are you looking at a pirated version? If it is a genuine version, you should be able to see the errata sheet, which has been corrected.
There should be an errata sheet for obvious errors
The errata has been changed. There are many errors in this.
The flange standard has been revised three times before and after, and this error has been corrected.
The 2009 edition of Pipe Flange has been published with 7 errata, and the error on 438 pages was corrected in the errata on January 15, 2010.
Too much information. It might be better not to publish a bound volume.
The errata has been revised. Thank you very much for your advice!