"Code Change" Symbol on the P&ID 2

[McDermott1711]

Hi everybody,
Is it customary to show a code/standard change symbol where ever there is such one in a line on the P&ID (e.g. from B31.3 to B31.8)? If so, introduction of any reference will be highly appreciated.

 

[LittleInch]

Yes.

Normally a thin line with two lines with arrows pointing to it with the two codes. Is that what you meant?

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[C2it]

It is crucially important that Code changes are denoted on P&ID's, since they are often accompanied by a change in wall thickness and frequently, material too.

I agree with Littleinch about symbols, although I don't recall any Standard for this.

It depends on the engineering design company, but there will usually be a change in line number too, if for instance going from a transportation pipeline to process piping.

 

[mmorga9]

My experience is primarily in nuclear, but I made a quick (i.e. crude) sketch of how I've typically seen class change designations on PIDs. In my example, the class change is at the flange of the valve with a format how LittleInch described.