ASTM materials for AD 2000 Merkblatt W5 1

[Hari_1402]

Hello, we need to supply a valve for which AD 2000 merkblatt is mandatory. AD 2000 Merkblatt W5 have list of materials of EN/DIN standards. Our foundry supplier has AD 2000 Merkblatt W0 certificate. We need to cast ASTM material (For example ASTM A216 gr. WCB), how to proceed? Does it require EN 10204 3.2 certificate? or any special procedure like PMA (Particular Material Appraisal)?

Thanks in advance for your valuable replies.

 

[The Obturator]

You've already asked a not too different question in the valve forum on this. Same answer generally applies. Please do not double post.

If the material is not listed in AD Merkblatt then it cannot comply to AD Merkblatt. As per the other post regarding a valve to the same standard. The regulatory body is now the Pressure Equipment Directive. Check with your client if the installation is in the EU, in which case PED is mandatory. I suspect you are being asked for a replacement of an older, pre 2002 valve. PED became mandatory in May 2002. If installation is EU, then PED assessment and qualification will be required for the product and also the identified pressure containing parts. This will also include the foundry and material grade (can be ASME/ASTM) to also be certified in line with PED rules.

*** Per ISO-4126, the generic term 'Safety Valve' is used regardless of application or design ***

*** 'Pressure-relief Valve' is the equivalent ASME/API term ***

 

[DBreyer]

You can use ASTM materials for parts under the AD2000 rules (and comply with PED) if you have a particular material appraisal (PMA) for the material and application you want to use it in. In most cases a PED Notified body (e.g. TÜV) will be able to help you with this. This is also stated in AD2000 material codes.
With the PMA you demonstrate that the material you want to use complies with the safety requirements of the PED and is fit for the intended application.
Usually this will at least require 3.2 certification and might require additional testing (e.g. impact testing).

For ASTM materials like ASTM A 216 WCB this is quite a common practice.