Dear Vinayak,
Thanks for your response.
Well this is what I found,
ASME B 31.1
133 STAMPING
Stamping, if used, shall be performed by a method
that will not result in sharp discontinuities. In no case
shall stamping infringe on the minimum wall thickness
or result in dimpling or denting of the material being
stamped.
CAUTIONARY NOTE: Detrimental effects can result from
stamping of material which will be in operation under long term
creep or creep fatigue conditions.
Along with this we all know that the stamp should be low stress type with round edges of letters (sharp edges lead to stress concentration points on metal surface). It is generally not recommended for SS as it may lead to surface contamination. Etc. The usage is dependent on criticality of fabrication (usage temp, cyclic conditions, loading, pr etc) . The questions I asked need specific documental references (if available) for solving the purpose.
I hope you/ someone can further enlighten on this topic.
Thanks in advance.
Regards
Rajneesh Gaur
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Vinayak Kale
Sent: Thursday, September 24, 2009 10:57 AM
To: materials-welding@googlegroups.com
Subject: [MW:3299] Re: stamping on material
Importance: High
Dear , Punching is only for the traceability & identification , few codes accept hard punching in terms of criticality & application criteria. impression marks must not in depth means should not affect thickness and should not create any undue stress
ASME VIII Div 1 , Subsection A - Part UG - clause UG - 10 -General requirements - enlighten more
Thanks & Best Regards,
Vinayak Kale
QA & I , OGSP
Larsen And Toubro Ltd
Powai , Mumbai
vinayak_kale@lntenc.com
Ph No.+91- 67053805/3685
Fax No. +91-67051988
| "Rajneesh Gaur" <rajneeshgaur@gmail.com> 09/24/2009 11:49 AM
|
|
Dear all,
First of all I am new to the group and find the information very interesting and useful.
Can someone answer this question, with references to code etc;
(1) what is criteria of hard punch ? when its required ? above what thickness it is allowed?
Regards
Rajneesh Gaur
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