Weld seam flush grinding

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As i experiencing problem during inspection of piping, usual engineering practice pipe long seam weld need to be flush grinded before welding of circular seam weld in piping (adjacent), i already raised the issue to contractor to flush grind during fit up before welding is to be carried out.but contractor not agreeing for that, they asking for standard reference like asme b31.3...Any body could help me in this issue please.
Reply:I can't cite a spec for you, but I'll try and rewrite it in a manner that might help others answer:I have an issue with my piping inspection. Typical engineering practice for joining welded pipe is to grind the weld seam flush during fit up. I've asked the contractor doing the fit up to do this, but they are asking for a reference to an engineering standard such as ASME B31.3 before they will. Does anyone know somewhere this is specified?
Reply:I'm on vacation and don't have access to my most recent code books, but here is the gist of it from ASME B31.1, Power Piping, 2001:(C) As-welded surfaces are pernitted; however, the surface of welds shall be sufficiently free from coarse ripples, grooves, overlaps, abrupt ridges, and valleys to meet the following. (C.) The surface condition of the finished welds shall be stitable for the proper interpretation of radio- graphic and other nondestructive examinations when nondestructive examinations are required by Table 136.4. In those cases where there is a question regarding the surface condition on the interpretation of a radio- graphic film, the film shall be compared to the actual weld surface for interpretation and determination of acceptability. (C.2) Reinforcements are permitted in accordance with Table 127.4.2. (C3) Undercuts shall not exceed /32 in. (1.0 mm) and shall not encroach on the minimum required section thickness. (C4) If the surface of the weld requires grinding to meet the above criteria, care shall be taken to avoid reducing the weld or base material below the minimum required thickness.So to answer your question, the welds are not required to be gound flush unless they make it difficult to perform NDT.
Reply:Originally Posted by wade23454So to answer your question, the welds are not required to be gound flush unless they make it difficult to perform NDT.
Reply:gotcha.  Hard to tell from his question what he was asking.  Pictures solve everlything
Reply:Same answer for both - unless code dictates, then it doesn't need to be ground unless it inhibits appropriate NDE or results in a violation of weld reinforcement.  For the latter, it still would only need to be ground down after the fact, not before.