... liquid service,ptroleum craking,chemical fertilizer equipment,high pressure boiler,low & mid-pressure boiler,etc.Stainless Steel Pipe300 SeriesGB, ... in chemical equipment,fertilizer equipment and pipelines under high pressure or high tempretureOil casing pipeAPI J55, API K55, API L80 ... .5-16mmWidely used in the construction,pipe of industrial,water pipe,fence equipment,telecommunication tubes as well ...