professional production grooved pipe coupling and fitting for pipelines. Such as petrochemical pipeline, building engineering, fire pipeline, c and water treatment etc. Our main products are coupling, flange, elbow, tee&corss, reducer and valves etc. We obtained CE, ISO, CNAS , CF certificates etc. Our products are reliable quality , cost-effective and high value-added to ensure your profit. Our service is in place , the delivery time is short, the whole production process is tracked.