How should HG20592 stainless steel lined flanges and flange covers be designated?
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There is now a vertically hinged manhole with a lining, sized 500-6; the drawings have been prepared, but the flanges and flange covers with stainless steel lining are not specified. The tube is a 530*5 stainless steel tube. For example: HG20592-2009 Flange (B) 500-6 RF Q345R+S316L, HG20592-2009 Flange Cover (B) BL 500-6 RF Q345R+S316L – is this the correct way to express it?
The lining thickness should be indicated, right?
It’s my fault. It wasn’t explained clearly. The manhole specified is HG21599-2014 Manhole PL RFⅢb(NS-FKM) 500-6; drawings for this manhole are required. The flanges and flange covers among them are lined with stainless steel. Don’t want to create component drawings ； When making the annotations, I chose a standard flange, specifically the HG20592-2009 Flange (B) 500-6 RF Q345R+S316L. For the flange cover, I selected the HG20592-2009 Flange Cover (B) BL 500-6 RF Q345R+S316L. Is this description correct?
For lining equipment, which is more effective: cladding or surfacing?