φ219-Φ2120mm , each kind high frequency, two-sided submerged-arc welding coils, and may produce processes the non-sign product, the year productivity 150, 000 tons, mainly applies in the petroleum, the natural gas, the coal gas, the water source and so on long loses the pipeline. May also use in the chemical industry, the thermal energy pipe network, the electric power, the well drilling and so on other projects, the product registration is " the five continents ", in national key project projects and so on Three Gorges of the Yangtze River and nuclear waste processing receives the consistent high praise. Welcome to relate the service with Our company