Is this standard still in use today? JB/T 2556-1979 Vertical lift cover butt-welded flange manhole
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This post was last edited by Renzao Xianshi on 2019-5-30 at 14:36. RT It seems impossible to find the information on that official standard lookup website; by the way, is there any website that makes it easy to check the implementation status of standards? Thank you{:3_63:}
Thank you. So where can I find out about the newly implemented standards?
The Work Standard Network provides access to current standards as well as information on standard replacements. The standard you are looking for was abolished in 2010, and there is no successor to replace it.
HG/T21521-2014 Vertical lid with neck, butt-welded flange manhole
Thank you both, I’ll go take a look @huanghong @everyone2004
HG/T21521-2014