Quoting from [RKSHAH]:
We had bye seamless pipes form china factory and paid fully tothem the china factory supplied us the welded pipes to us. Now they do nto agree with us. As we had appointed the TUV for inspection at India and it gave the report that the pipes supplied by them is the Welded instead of seamless. Now what we do ????
Dear RKSHAH,
In fact, your question is not new and many an Alibaba member has asked similar questions. It'll be in your best interest to spare ten minutes or so to look at other posts on this forum as regards the similar question before you decide what should be the next step to take. You may probably be interested in the following post that may contain answers to your question. http://resources.alibaba.com/topic/9366/Anyone_having_questions_re_China_business_law_.htm.
If you have further questions not answered there, you are welcome to post any such new question and many lawyers here would be interested to take that.
Good luck.