Introduction to the structural length of seamless oil pipe

　　2. Seamless oil pipe for fluid transportation. It is mainly used for conveying fluid pipeline on engineering and large equipment. The representative materials are 20, Q345, etc.

　　3. Seamless oil pipes for low and medium pressure boilers are high-quality carbon structural steel hot-rolled and cold drawn seamless pipes used to manufacture superheated steam pipes, boiling water pipes, superheated steam pipes, large smoke pipes, small smoke pipes and arch brick pipes for various structures of low and medium pressure boilers. The representative material is 10 and 20 steel.

　　4. Seamless oil pipe for high-pressure boiler is a high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless pipe used for the heating surface of water tube boiler with high pressure and above. The representative materials are 20g, 12Cr1MoVG, 15CrMoG, etc.

　　5. Seamless oil pipe for high pressure fertilizer equipment is a high-quality carbon structural steel and alloy steel seamless pipe suitable for chemical equipment and pipes with working temperature of - 40 ~ 400 ℃ and working pressure of 10 ~ 30 ma. The representative materials are 20, 16Mn, 12CrMo, 12cr2mo, etc.

　　6. Seamless oil pipe for oil cracking. It is mainly used in the boiler, heat exchanger and fluid pipeline of petroleum smelter. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1cr19ni11nb, etc.

　　7. The steel pipe for geological drilling is used for core drilling by the geological department, which can be divided into drill pipe, drill collar, core pipe, casing and settling pipe according to the purpose.

　　8. Seamless oil pipe for diamond core drilling is a seamless oil pipe for drill pipe, core rod and casing used for diamond core drilling.

　　Seamless oil pipe is a kind of long steel with hollow section and no joint around. The length of seamless pipe is 3000-12000mm, including 6 meters. Seamless oil pipes in the market are generally not fixed length, most of which are fixed length of 6, 9 and 12 meters. The general length of steel pipe is as follows: hot rolled steel pipe 3000-12000mm, cold drawn steel pipe 3000-10500mm; in double length rolling (processing) steel pipe can reach 80m or longer, but in reality, the finished seamless petroleum steel pipe is generally less than 12M, which is mainly for the convenience of loading and transportation.