Customer Made All quality and all series are available Customer Made1.diameter: 300mm to 1500mm2. single weight: 3t to 50t3. material: carbon steel, alloy steel and stainless steel4.test: ultrasonic test5. annual production capacity: 30 000 tons to 40 000 tons6. certificates: ISO9001:2008, ISO14001:2004, OHASA18001:20077. competitive price, high quality, short lead time and the best serviceAny ...