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/T 9711-2011 L290M/X42M PSL2 LSAW pipeline is mainly used in petroleum, natural gas, chemical industry, electric power industry and shipbuilding, water transportation, L290M/X42M PSL2 LSAW pipeline's surface can be coated with spraying, coating, lined with 3PE, 2PE, FBE, sandblasting,can accept X-ray, ultrasonic inspection and water pressure inspection.
ISO3183 L320N / X46N PSL2 LSAW pipeline is KUNFENG International Co. flagship product, with good chemical properties and mechanical properties, in the production and life of a wide range of applications.
There are many steel suppliers in China, and KUNFENG as the famous steel supplier. The ASME SA283 Gr D carbon and low alloy steel plate as one of mainly products. We have been exported ASME SA283 Gr D carbon and low alloy steel plate more than 50,000 ton.