What is large diameter seamless steel pipe

Large-diameter seamless steel pipe is a general term for seamless steel pipes with 325mm-1220mm diameter, and its maximum wall thickness that can be achieved is 200mm. The diameter of small-diameter seamless steel pipes is generally below 89mm. The processing technology of large-diameter seamless steel pipes is hot rolling ( hot-rolled large-diameter seamless steel pipe ) or thermal expansion ( hot-expanded seamless steel pipes ).

Large-diameter seamless steel pipes are made of various materials, and can be customized according to customer needs. Large-diameter seamless steel pipes are used for pipelines in chemical, petroleum, machinery and so on industries.