Along with our country's environmental advocacy action more and more, in the production process of the large caliber steel pipe, environmental protection materials began to appear, which can be achieved, and in the production process, almost no waste gas and waste material emissions. Clean products can produce good results in operation. Moreover, due to the comparison of production equipment, the production cost can also be reduced, so the production cycle is quite short. The quality of the products is outstanding and has become popular in various industries. The hardness after quenching can reflect the yield strength and tensile strength of large-caliber steel pipes with the same quenching conditions. Therefore, the drawings and technical conditions of large-caliber steel pipes generally only specify the hardness value. Other mechanical properties are specified only for very important parts. It is necessary to consider the requirements of the manufacturing process and load conditions in use to determine the hardness of large-diameter tempered steel pipe. Considering the manufacturing process, it is hoped that the parts can be conditioned in the blank state, and then be machined and assembled. The deformation and decarbonization of such large-diameter steel tubes during heat treatment will be carried out in the laser cutting process.

In what environments are large-diameter steel pipes suitable?

1. Petrochemical: crude oil, refined oil, petrochemical raw material, and finished product pipeline and oilfield pipe network.

2. Natural gas: submarine and land long-distance pipelines; Gas receiving station pipeline; Gas field and urban natural gas network.

3. Coal: transportation of coal, coal water slurry, etc.

4, structure: wharf steel pipe pile curtain; Steel pipe for high-rise buildings and bridge structures; Structural steel tubes for offshore platforms.

5. Other categories: tap water transportation; Power plant to take drainage pipeline and high-pressure pipeline.

The application of large-caliber steel pipe has been started in various industries. Since the duct was already designed with corroded tape, the project did not require much effort. In the process of transporting water, gas, petroleum, chemical raw materials, and so on, the stability of the pipeline should be attached to great importance. If corrosion occurs in the pipeline in use, it will produce relatively large interference to the medium. At present, the manufacture of environment-friendly large-diameter steel pipes has successfully solved this problem. It reduces the risk of pipeline use, and oil and gas transport stability can and will.

The production process of large-diameter steel pipe generally includes hot rolling, hot coil, casting, and other production methods. In general, a double-sided submerged arc welding production process is used in the processing of large-diameter thick wall steel pipe. The product goes through multiple processes such as bending, joint, internal welding, external welding, straightening, and flat head. The use of large-diameter steel pipe is mainly used for the body support part, such as bridge piling, bottom piling, and high-rise building piling. Some businesses have done well to close the market in advance of the plan, but the scrap steel market is increasingly depressed; The operation of merchants is still based on the fast in and fast out mode, but the transaction volume is still small. It is expected that the recent domestic scrap market will continue to operate at a low level. In the construction steel spot market, the spot demand is shrinking, and near the end of the month, the market capital pressure increases, coupled with the impact of export policy adjustment, the domestic trade pressure increases, the overall contradiction between supply and demand of large-caliber steel pipe intensification, the spot price decline from north to south, although the recent maintenance and production reduction of steel mills frequently, but the main domestic market inventory has been rising for several weeks. The contradiction between supply and demand is acute. Overall consideration, large diameter steel pipe price will still be the main downward.

Cangzhou Shenlong Pipe is specialized in the production of straight seam steel pipe, product quality control is strict, fast delivery, is the qualified supplier of petrochina, BP oil.