Although the conventional steel pipe inner casting wear-resistant layer composite steel pipe better overcomes the shortcomings of many wear-resistant tubes, due to the production process, the wear-resistant layer of high chromium cast iron cast in the finished steel pipe is difficult to form uniform and stable bonding with the outer steel pipe. The inner layer of high strength and high brittleness not only cannot strengthen the whole, but also leads to cracks at the boundary of the joint due to internal stress. Exfoliation occurred at the non-junction. Because Uchimura metal on the outer cryogenic steel pipe surface flow temperature drop rate is very fast, resulting in the inner metal slag solidification, surface finish is poor. The presence of a rough inner surface as a fluid conveying pipe is undesirable. Therefore, the storage of bimental composite pipe also needs attention.
Storing bimetal composite pipes indoors is better, but if they are stored outdoors, there are some precautions. Whether it is properly stored also affects the quality of bimental composite pipes.
If the wear-resistant pipe is stacked in the open, it must be put under the wear-resistant pipe wood pad or strip stone, and the battlement surface should be slightly inclined. To facilitate drainage, and pay attention to whether the bimetal wear-resistant composite steel pipe is placed straight, to prevent bending deformation of the steel pipe. The strength of wear-resistant pipe is generally higher than that of straight welded pipe, and the pipe with larger diameter can be produced with narrower billet, and the pipe with different diameter can also be produced with billet of the same width. But compared with the same length of straight seam pipe, the weld length is increased by 40~100%, and the production speed is lower. After cutting into a single steel pipe, each batch of steel pipe head three to carry out strict first inspection rail system, check the mechanical function of the weld, chemical composition, fusion status, surface quality of the steel pipe and through non-destructive inspection and maintenance, to ensure that the pipe process qualified, before formally put into production.
After the production of the bimental composite pipe, you should also pay attention to keep it, which is a kind of protection for the product, even after the customer buys the product, we will give a warm reminder, which is not only responsible for the product, but also responsible for the customer.
