Groove pipe connection technology is also called the clamp connection technology, has become the current first technology of liquid, gas pipeline connections, although the technology in domestic development time later than abroad, but because of its advanced technology, was received by the domestic market soon. Developed since 1998, after just a few short years of development and application, has gradually replaced the flange and welding two traditional pipe connection. Not only technically more mature, the market is widely recognized, and obtained the national laws, regulations and policies related to actively guide.