Seamless Steel Pipe for Petroleum
There are many kinds of seamless steel pipes. Seamless Steel Pipe for Petroleum is one of them. It has hollow section and long steel without seams around it. Oil cracking pipe is a kind of steel with economic section. API 5CT of oil seamless steel pipe is classified into K55, N80, L80 and P110 grades.
Petroleum seamless steel pipe is widely used in manufacturing structural and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Manufacturing annular parts with petroleum cracking tubes can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing rings, Jack sleeves, etc. At present, steel tubes have been widely used in manufacturing. Petroleum cracking tubes are also indispensable materials for all kinds of conventional weapons. Gun barrels, barrels and so on need to be made of petroleum cracking tubes. Petroleum cracking pipes can be divided into circular pipes and special-shaped pipes according to the shape of cross-sectional area. Because of the large area of petroleum cracking pipe under the condition of equal perimeter, more fluid can be transported by circular pipe.
The export of API5CT Seamless Steel Pipe for Petroleum
1. The key importing countries of seamless steel pipes for petroleum are Germany, Japan, Romania, Czech Republic, Italy, Britain, Austria, Switzerland, the United States, Argentina and Singapore. The import criteria refer to API 5A, 5AX, 5AC. Steel grades are H-40, J-55, N-80, P-110, C-75, C-95, etc. Specification emphasis is 139.77.72R-2, 177.89.19R-2, 244.58.94R-2, 244.510.03R-2, 244.511.05R-2, etc.
2. In API standards, there are three kinds of lengths: R-1 is 4.88-7.62 m, R-2 is 7.62-10.36 m and R-3 is 10.36 m-longer.
3. Some foreign goods are marked with LTC, i.e. filament fastening sleeve.
Anti-corrosion Scheme of Seamless Steel Pipe for Petroleum
1. First of all, we should do a good job in meeting the water quality standards and strictly monitor and manage the water quality. Clean up and separate the sewage, strengthen the cleaning of main water pipeline, achieve the water quality standards in the station and bottom hole, reduce the corrosion source into the annular space;
2. For newly put-into-production water injection wells, annulus protective fluid with sterilization as the main method should be added, and a system should be formed to add it regularly.
3. In view of the accelerating effect of mechanical abrasion on Corrosion of oil casing, it is suggested that a rubber ring be added to the tubing coupling or a centralizer be added to the serious deviation part to avoid tubing scratching and one side contact casing during operation and water injection.
4. In view of the serious corrosion of bacteria under scale and the slow growth and killing of SRB at high temperature, high temperature water or steam of 100 degrees Celsius can be injected into annulus regularly to kill SRB under scale.
5. It is not recommended that cathodic protection and coated casing be popularized until corrosion in casing of water injection wells is not effectively controlled.
