PED or ASME Stamp

[Inchtain]

We are purchasing a new condenser (Heat Exchanger) for a LNG Plant.

We wonder if we request an ASME or PED Stamp from the manufacturer? and what is the main differences between those 2 stamps, apart from ASME for America and PED for Europe

The Heat Exchanger Data:

Fluid: Shell: Hydrocarbon Gas / Tubes: Cooling Water
Design Pressure: Shell: 29.42 Bar / Tubes: 20.6 Bar
Design Temperature: Shell: 90 Degrees Celsius / Tubes: 70 degrees Celsius
Materials: Shell: SA 333 Gr. 6 / Tubes: SA 334 Gr. 1
Exchanger Type: BEM
Exchanger Dimensions: Dia. 381 mm * Overall L 6927 mm
Design Codes: ASME VIII Div. 1- TEMA R- API 660- 2014/60/EU

Thanks for your cooperation

 

[LittleInch]

Are you joking?

You can't just randomly decide which one you want and that's a whole heap of different design codes you post. 2014/60/EU refers to return of cultural object so I think you need to check that out.

Your particular country and its AHJ will have options or state one or the other is acceptable.

If you want PED, I'm pretty sure you need to design to EN 13445

 

[IdanPV]

PED 2014/68/EU applies to the design, manufacture and conformity assessment of pressure equipment and assemblies with a maximum allowable pressure greater than 0.5 barg. PED is a law made to eliminate the technical barriers across the EU, it does not impose detailed technical solution nor design instructions.

You may use an Harmonized Standard (such as EN 13445) but, you can use any other design code as you want, provided that you comply with the ESR (Essential Safety Requirements) set forth in ANNEX I of the PED.

As for the OP question - where is the Heat Exchanger will be located?

 

[Inchtain]

Thanks for your contributions

The Exchanger will be installed in North Africa (Libya) where both codes are acceptable.

Is it right that PED is more stringent than ASME?

 

[IdanPV]

PED is not a design code, you may use an Harmonized Standard (such as EN 13445) but, you can use any other design code as you want, provided that you comply with the ESR (Essential Safety Requirements) set forth in ANNEX I of the PED.

ASME is a Construction Code, which deals with materials, design, fabrication. examination, inspection, testing, certification and overpressure protection.
You can't compare it to PED.

 

[LittleInch]

In Libya I would go the ASME route.

I would also want to paid upfront for everything, design, materials, manufacture and before delivery.

 

[Si-bo]

Here to point out that PED doesn't necessary mean that EN13445 needs to be considered.
Calculation code doesn't matter as long as you are in compliance with PED requirements.
For example, we usually manufacture PV & HE for EU market designed acc. to ASME VIII div.1 and PED certified.

Since you are considering ASME materials and ASME design code, I would go for u-stamp certification in this case.


Regards

S.

 

[LittleInch]

Si-bo,

Do you still get the vessel ASME stamped and a U-1?
And then a PED certificate.

 

[Si-bo]

@LittleInch

Vessels are not stamped but they are in total compliance with ASME code (materials, NDE, mech. calculations, welding and so on).
Then PED certificated.

Edit: forgot to mention no U-1 (MDR) needed

Hope it's more clear


S.

 

[IdanPV]

PED is not only about stamp.

The conformity assessment procedures to be applied to an item of pressure equipment shall be determined by the category as set out in Article 13 of the PED and the Module(s) shall be determined in accordance with Annex III.

 

[m.bagattini]

OP, you're comparing apples with oranges, as someone else already said. PED doesn't give you directions about how thick a certain part have to be. So it's not correct to compare PED and ASME VIII Division 1: you should compare ASME VIII Division 1 with EN 13445 (that for heat exchangers design follows the same rules as Division 1) or AD 2000, as these are all design codes.

If those are the materials you have to use, I think your equipment would result a bit lighter when designed according to ASME; if, on the other hand, you may use the European counterparts of those materials, you may have a lighter equipment using EN 13445 (I think SA 333 is P265).

I would also take the flanges connecting to the piping into consideration: if those have to be ANSI flanges, you would end up having to design them using the code rules under EN 13445, as they can't be used by their rating.

Finally, for tubesheet design alone, the most cost-effective design code could be AD 2000, that can be adopted under the PED; anyway due to the relatively low pressure and small diameter you probably won't have much difference here.

 

[IdanPV]

You can use SA materials in a PED construction, you only have to certify them by PMA.

 

[m.bagattini]

You can use SA materials in a PED construction, you only have to certify them by PMA.

Sure you can, but their performance is lower than the equivalent EN material