The operation conditions of oil storage and transportation system in petrochemical enterprises are relatively “mild” compared with production equipment. Its working pressure is generally below 2.5Mpa, in some cases up to 4.0 Mpa; the working temperature is generally below 100 °C, the highest does not exceed 1809C, only when purged with 1.0Mpa steam, the highest temperature up to about 250 °C. Various oil products-generally no corrosion or only slight corrosion. Production operations of oil storage and transportation, such as oil loading and unloading, reconciliation, and transportation, are generally intermittent corrosion. Production operations of oil storage and transportation, such as oil loading and unloading, reconciliation, and transportation, are generally intermittent operations. Only a few pumps that supply raw materials to production equipment are continuously operated.
The selection of pipes for oil storage and transportation systems in petrochemical enterprises is currently in accordance with the industry standard “General Rules for the Selection of Pipeline Design Equipment for Petrochemical Enterprises” (SH3059-94). The specification for selection of resistance welded carbon steel straight seam steel the product whose expansion rate does not exceed 1.5% of the outer diameter after cold expansion should be used in pipes with a design temperature not exceeding 200 °C without cooling The expanded steel pipe can be used for pipes whose design temperature does not exceed 425 °C. It can be seen from this that ERW steel pipes can be used in the oil storage and transportation system. However, in the actual design work, each design unit has more specific pipe selection regulations and some customary practices.
Due to the limitation of historical conditions, there were no ERW steel pipes in China in the 1970s and 1980s, and only high-frequency welded steel pipes that could be used for low-pressure fluids (such as water, compressed air, etc.), that is, according to the national standard “galvanized welded steel pipes for low-pressure fluid transportation” ( GB3091) and “welded steel pipes for low-pressure fluid transportati in accordance with industry standards “Spiral Seam Submerged Arc Welded Steel Pipe for Pressure Fluid Transport” (XSY5036) and “Spiral Seam Hi