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Oil and Gasoline Storage and Transportation Projects Promote the Use of ERW Steel Pipes The operation circumstances of oil storage and transportation method in petrochemical enterprises are fairly "mild" compared with manufacturing gear. Its working stress is usually below 2.5Mpa, in some instances up to 4. Mpa the doing work temperature is generally beneath 100 °C, the highest does not exceed 1809C, only when purged with one.0Mpa steam, the highest temperature up to about 250 °C. Numerous oil items-generally no corrosion or only slight corrosion. Manufacturing operations of oil storage and transportation, this kind of as oil loading and unloading, reconciliation, and transportation, are generally intermittent corrosion. Manufacturing operations of oil storage and transportation, this kind of as oil loading and unloading, reconciliation, and transportation, are generally intermittent operations. Only a few pumps that supply raw supplies to manufacturing equipment are continuously operated. The choice of pipes for oil storage and transportation systems in petrochemical enterprises is presently in accordance with the sector standard "General Rules for the Selection of Pipeline Design and style Products for Petrochemical Enterprises" (SH3059-94). The specification for choice of resistance welded carbon steel straight seam steel pipe (ERW pipe): the solution whose growth price does not exceed 1.five% of the outer diameter following cold growth ought to be employed in pipes with a layout temperature not exceeding 200 °C without having cooling The expanded steel pipe can be used for pipes whose layout temperature does not exceed 425 °C. It can be seen from this that ERW steel pipes can be utilised in the oil storage and transportation method. Nonetheless, in the actual design operate, every design unit has a lot more particular pipe variety regulations and some customary practices. Due to the limitation of historical problems, there had been no ERW steel pipes in China in the 1970s and 1980s, and only high-frequency welded steel pipes that could be used for low-strain fluids (such as water, compressed air, and so on.), that is, in accordance to the nationwide common "galvanized welded steel pipes for reduced-strain fluid transportation" ( GB3091) and "welded steel pipes for low-stress fluid transportation" (GB3092). There are also spiral welded steel pipes produced in accordance with market specifications "Spiral Seam Submerged Arc Welded Steel Pipe for Pressure Fluid Transport" (XSY5036) and "Spiral Seam Higher Frequency Welded Pipe for Strain Fluid Transport" (XSY5038). This type of steel pipe can usually only be utilized in non-toxic medium pipes with a design and style pressure not exceeding 1.0Mpa. For that reason, in the style of oil storage and transportation programs, no matter what the actual manufacturing and operating problems are, only seamless steel tubes can be utilized. For a long time, the specific pipe selection rules of different units have specified the use of seamless steel pipes below general situations. Only in DN2350 can spiral spiral submerged arc welded steel pipes be employed (the main explanation is that big-diameter seamless steel pipes need to be imported at the time, the value high-priced). At times in order to decide on materials for production gear, it is also necessary to select seamless steel pipes in the oil storage and transportation program. Given that the 1990s, my nation has successively launched ERW steel pipe production technologies and products from abroad, and has been ready to make DN80-300 ERW steel pipes, with an yearly output of up to millions of tons. It can be developed according to API, ASTM, GB/T and other standards. Although the price of these goods is much reduce than that of seamless steel pipes and can also be adapted to a lot of production occasions in petrochemical enterprises, these merchandise have not been widely utilised in PetroChina and Sinopec techniques due to numerous reasons. For the development of long-distance pipelines, the option of pipe resources and pipe-generating strategies is very crucial. It not only affects the construction technologies and quality of pipeline engineering, but also impacts the protected operation and management of pipelines in the future, as nicely as the complete venture. Investment has a massive impact (in the total project investment of extended-distance pipelines, the Investment normally accounts for about 50%-65%). The length of the trunk line from Zhenhai Refining & Chemical Co., Ltd. to Xiaoshan Nanyang Oil Depot in Zhejiang is 153KM, and the length of the branch line is 5.3KM. The adopted pipe diameter is 355.six*six.4mm, X42 steel grade, the design and style functioning strain is 6.4Mpa, and the conveyed medium is 90*, 93# unleaded gasoline. # light diesel and three# aviation kerosene and other 4 oil goods. The maximum transmission volume of the created undertaking in the first phase is 2,232,900 tons/12 months, although the maximum transmission capability of the pipeline layout is three.102 million tons/12 months. site Pipeline anticorrosion adopts anticorrosion technique combining sintered epoxy powder coating and utilized present cathodic protection. The welding technique is manual all-position downward welding. The project utilizes ERW steel pipes in complete 7100 tons, calculated at an average conserving of 800 yuan/ton per ton (in contrast to SML steel pipes), the whole venture will save 7100x800=568 million yuan for a single steel pipe, which has accomplished gratifying economic rewards. In the history of the globe, ERW steel pipes have tended to be mature and best in the 1980s. A huge quantity of domestic innovative technologies have been launched in the 1990s, and they have been promoted. Not only in theory but also in practice, ERW steel pipes can be explained in the field of oil and fuel storage and transportation. Dependability and security of transmission quality and minimize pipeline building investment. In the long term oil and gas storage and transportation tasks and pipeline construction, we have to break the outdated routines inherited from the design and vigorously market the use of ERW steel pipes.