Definition of Integral Construction

[Zach1]

I just started studying the Pressure Vessel Design Manual and it mentions different criteria for integral vs non-integral construction. What is the definition of integral construction?

 

[SnTMan]

Zach1, What is the context?

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Zach1]

I saw the term in the Fatigue Analysis section of the Pressure Vessel Design Manual but I assume it's a general design criterion. There is a list of tips to eliminate or reduce stress risers: 1. Use integral construction 2. Avoid fillet welds 3. Avoid reinforcing pads ...etc.

 

[SnTMan]

OK, sort of sounds as though the context is nozzle or opening reinforcement in which case integral construction simply means all reinforcement is provided by the shell and nozzle sections and the welds joining them, no additional reinforcing elements such as pads are used.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Zach1]

Thanks. The book doesn't specifically give any context. If you look at the fatigue screening criteria in Table 1-3 attached, all it says is integral construction vs non-integral construction.

 

[SnTMan]

Possibly only the author knows for sure...

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Zach1]

But table 1-3 is in ASME Section VIII, Division 2. There it is called Table 5.9. So it has to be known by those who know the code well.

 

[SnTMan]

Ah. Not familiar w/ Div. 2. But I'd hazard a guess that integral construction generally means components are joined by full penetration welding, rather than fillet welds only.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[Zach1]

OK that makes sense. Thanks for your help.