PED Hot Formed Heads
PED Hot Formed Heads
(OP)
As mentioned in another thread, PED 97/23/EC heads that are hot formed need the head manufacturer's quality system to be ISO certified with an European pedigree or certified in accordance with PED 97/23/EC since the material properties are changed during the forming process. Based on my research, no head manufacturer has this type of certification in the United States. Does anyone know of a supplier meets this quality system requirement and can form thick wall 2:1 elliptical heads per ASME in SA-516 70 material?
thank you
Wesley
thank you
Wesley





RE: PED Hot Formed Heads
That sounds quite odd to me...
RE: PED Hot Formed Heads
RE: PED Hot Formed Heads
I believe it´s really pretty simple (it's 68 pages of txt w/ 250 pages of interpretation, whereas the B&PV is 10000+ pages).
Otherwise, pay a few bucks more for a 3.2 certificate by calling in your NoBo.
RE: PED Hot Formed Heads
Maybe only re-testing of the material by an agency that is properly certified by the PED 97/23/EC requirements?
RE: PED Hot Formed Heads
RE: PED Hot Formed Heads
Another thing would be to ask for a 3.2 certificate, which makes the requirement for an (ISO) quality system to be in place, obsolete. However, its gonna cost you a few more bucks.
Can you tell me your volume, pressure, and if the medium is gas/liquid and dangerous/non-dangerous?
As jwhit mentioned you may be on the lucky side of the line when it comes to the category and applicable module.
If ASME is your Code of construction, the ASME PED Guide may also be useful.
Some other links for help;
- http://www.eng-tips.com/viewthread.cfm?qid=265583
- Google's help on eng-tips
- Also keep in mind some materials are not 'PED approved', and may need an EAM or PMA; http://files.asme.org/asmeorg/Codes/CertifAccred/A...
- And Google again ..
Other than that Im afraid I cant help you, dont have a lot of experience with your specific case.