in 6 or more passes there will be more welding on surfaces within close proximity. Such welding will make parent metal hard and brittle... in order to avoid such problem, PWHT requirement is added by API, so that parent metal becomes soft and adhere to its properties.
On Sunday, July 5, 2015 at 8:18:46 PM UTC+5:30, mrshiha wrote:
-- On Sunday, July 5, 2015 at 8:18:46 PM UTC+5:30, mrshiha wrote:
Can anybody explain to me why its stated in latest API660 for this requirement? Its not stated any reason why is shall be PWHT due to lethal sevice or regarding thickness
Shiha
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
Visit this group at http://groups.google.com/group/materials-welding.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/121d03d5-1651-4eb2-b5c3-a7c8797c9703%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
Comments