Hebei DIKAI Piping Products Co., Ltd., (CNG) was established in 2002 and covers area more than 100,000 square meters ,CNG is the pioneer of grooved fittings in China and has been the most professional manufacturer after 20 years of development, The foundry is equipped with 4 automatic casting lines, 40 sets of CNC machines, 4 painting lines ,2 half automatic assembling lines and one perfect test center, Which make sure the products quality are reliable and stable.