Applied rule for Air Fin Cooler

[ryu.changmyong]

Dear sir,

I want to know correct applied rule for AFC(Air Fin Cooler)
There is fin tube connected between two tube header, As I know this header thickness calculated by ASME SEC.1 not for ASME SEC.VIII Div.1
however, tube ligament efficiency calculation is shown on UG 53 in DIV.1
I wonder which rule is correct for this header thickness calculation.

 

[SnTMan]

These things are done to Div. 1 all the time.

Regards,

Mike

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

 

[Jano6924]

As SntMan wrotte. The aircoolers headers shall be calculated per ASME VIII-1, Appendix 13.

Regards.

 

[ryu.changmyong]

Dear Jano6924
Header configuration is circular type not rectangular. Gernerally in HRSG, this header shall be calculated by SEC. 1 However, I was requested it to comply with Div.1 UG53
So I wonder that this is correct

 

[SnTMan]

So, is this a boiler or a cooler? Does Sec I not have rules for ligaments?

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

 

[Jano6924]

I don't know if such headers can be calculated per Section I.

Appendix 13 of VIII-1 has rules for circular headers, see Fig. 13-2(c). In any case the holes for tubes and plugs are multi-diameter holes, and because of that I don't think UG-53 would apply.

Regards.

 

[ryu.changmyong]

Appendix 12 is rule for Non-circular header.

 

[Jano6924]

See paragraphs 13-2(c) and 13-13 for vessels with circular cross section having a staying member.

For ligaments see paragraph 13-6.

Regards.