Pipe & Tube SystemChina En 10216-2, DIN 17175 St 35.8 Steel Pipe, 15mo3 Steel Pipes for Pressure Purposes Boiler Tubes, Find details about China St33.2 Steel Tube, DIN2440 Steel Pipe from En 10216-2, DIN 17175 St 35.8 Steel Pipe, 15mo3 Steel Pipes for Pressure Purposes Boiler Tubes