Drill String Cross-over Sub uses AISI4145H chromium-molybdenum steel, execute API specification.We can produce the same-dia type, reducers type and L-type three types, the screw can be cold thread rolling, copper or phosphate treatment.
ASTM A672 N75 LSAW pipeline is a kind of industrial steel pipe, the carbon content of 0.30 or more, good mechanical properties and chemical properties, ASTM A672 N75 LSAW pipeline used in petroleum, natural gas, power plants, petrochemicals, urban construction and other construction pipeline, the surface can be galvanized.