reference of standard on drawing
reference of standard on drawing
(OP)
Hi friends,I have a question regarding the mentioning of two different standards on drawing,one for welding and other for inspection. I received a drawing from the defense industry they were referring one military standard for welding but on the same drawing it was noted that inspection shall be done according to other mil standard.
Is this possible? Should'nt there be uniformity in the application of standards?
Thankyou
Is this possible? Should'nt there be uniformity in the application of standards?
Thankyou





RE: reference of standard on drawing
RE: reference of standard on drawing
RE: reference of standard on drawing
RE: reference of standard on drawing
See why it is so important to do the specs right? It's O.K. to combine them like that but modify them as required to not contradict each other. We frequently combine AWS and API but VERY carefully. The Order of Precedence will cover a few misses but it is still a crutch.
RE: reference of standard on drawing
You did not note what MIL-Specs were called out on the drawing. Typically, in addition to a weld spec and a NDI spec, there should also be a standard called out for NDI accept/reject criteria.
RE: reference of standard on drawing
RE: reference of standard on drawing
As for referencing a separate inspection standard, as others have stated, that is not unusual. If the acceptance criteria are given in the welding standard, then the inspection protocol should address that. If there is a conflict between the acceptance criteria in the two different standards, then issue a request for information and let the design professional of record make the call (in writing of course!).
RE: reference of standard on drawing
All military fabrication documents include a provision stating the hierarchy or precedence of the other documents. Generally, there is an upper tier document that addresses the general requirements of construction. That document references other working documents such different NAVSEA documents for qualifying the welding process, a fabrication document for actual fabrication requirements, a different working document for acceptance criteria, and a standard for qualifying inspection personnel. Also referenced are various material standards, painting standards, standards for properly marking items, cleaning standards, packing standards, etc. All of these requirements can be modified by the customer (Government agency. Such modifications, i.e., exceptions, additional requirements, material substitutions, etc. are usually noted in the project specifications or purchase order. Generally, the construction drawings are reviewed and approved by the customer. Exceptions taken by the contractor/fabricator are suppose to be noted during the submission process. All exception or modifications to the contract documents are supported by letters of approval. Those letters are noted on the approved drawings so that anyone reviewing the drawings at a latter time understands the modifications have been noted and approved by the client. The bottom line is the approved drawing and approved bill of materials becomes the "Bible" for the purposes of construction.
Best regards - Al
RE: reference of standard on drawing
Governing specifications can be defined on a drawing or within an overarching Engineering Specification or a Contract Document within the Purchase Order.
RE: reference of standard on drawing
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