... is widely used in water, oil, gas transmission pipelines and other oil drilling and casing, and can be used for the structure, shipbuilding, electric ... power, coal, chemical industry, and in areas such as thermal ... ,X-46,X-52,X-56,X-60 API 5CT tubing and casing pipe: H40, J55 4) Diameter range: 73mm-426mm 5) Wall ...