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.
GB/T700 Q235A is the china standard of carbon and low alloy steel plate. with the development, more and more countries uses it. GB/T700 Q235A carbon and low alloy steel plate’s buyers from different countries of KUNFENG send us many good feedback.
ASTM A671 CF66 LSAW steel pipeline is mainly applied to long distance transportation pipeline for oil, gas,liquid coal etc. on land and offshore. And also can be applied as construction pipes on offshore platform, power station, petrochemistry and city construction etc.