PD5500 ALTERNATIVE SPEC 1

[mclp]

COULD ANYONE TELL ME IF ANY OF THE FOLLOWING OPTIONS ARE EQUIVALENT TO PD5500 2000 CAT 3.
Option 1 Design according to AD Merkblatt 2000+PED 97/23/EC Module G category IV +CE marking materials according to EN standards

Option 2 Design according to ASME code section VIII Div1+U stamp materials according to ASME II A/D.

 

[mclp]

Fawkes thanks for the quick response.
If we already have a vessel that was designed and previously manufactured to PD5500 Cat 3 module G to be re- produced again could we use exactly the same drawings but drop the module G to avoid third party inspection.

 

[mclp]

I have found a manufacturer of pressure vessels in China they are approved to ASME (U) our vessel requires to be manufactured to PD 5500 cat 3 module G can anyone tell me what the equivalent ASME standard is. The vessel is for use in the UK.Has anyone had any experience of purchasing a pressure vessel in China.A quick respone would be a great help many thanks mclp

 

[ggarciae]

As Fawkes have previosly said
"Code" and "Module" are different things.
You could manufacture to PD 5500 Cat. 3 or to ASME, but whatever the choose is, chiness manufacturer or whichever manufacturer abroad the UE and his legal representative in the UE must contact an approved Notified Body for the assessment and declare conformity with PED 97/23/EC.

Regards from Barcelona
G. García

 

[mclp]

many thanks regards mclp

 

[JohnGP]

mclp,
Fawkes and ggarciae have explained it like it is. To find out more about PED 97/23/EC, go to-

http://ped.eurodyn.com/.

The full text is available there, along with guidelines, etc.

Make sure your Chinese manufacturer is familiar with PED (i.e has supplied vessels into EU or dependancies in recent years). They are more likely to have experience with ASME VIII then with other international codes that could be used with the PED.

I have had experience with purchasing pressure equipment in China, but not under PED requirements, as it was for a Chinese project. I found even with just ASME VIII vessels you are likely to be asked to approve use of Chinese "equivalent" materials - PED goes further in that you require a Particular Materials Appraisal for the materials proposed (requiring Notifed Body involvement for a Category IV vessel, as I understand it). ASME has produced a guide for stamp holders on what additional actions they must take to meet PED requirements.

Regards,
John

 

[mclp]

JohnGP did you have problems with the vessel manufacturers in China could you give me contact details.Does anyone have experience of bringing pressure vessels into the UK from China dual CE and U stamped.Does this sound like the impossible.

 

[JohnGP]

mclp,

It was a few years ago, but as I recall the problems weren't huge - we had some issues with support design for one or two of the vessels, and ended up providing the manufacturer with a design we were happy with. We also had reluctance from another manufacturer to rerate a new vessel, and ultimately had to undertake the process ourselves to obtain approvals. But this was for a project within China for a facility that had existing ASME VIII vessels, some of which required replacement to suit new operating conditions (and some that were beyond refurbishment).

You probably would not have a problem in obtaining an ASME VIII vessel from China, but PED compliance may be another story. To avoid headaches you must ensure that your manufacturer has specific experience with the PED, otherwise it may be cheaper overall to have your vessel built in the UK. This is just my impression, but at the time I had not come across the PED and so am not aware of Chinese experience in this area.

Regards,
John