A wide variety of non-standard pipe specifications and models are available, covering a range of sizes from small to large. Depending on the cross-sectional shape, non-standard pipes can be categorized into types such as square, rectangular, elliptical, and hexagonal non-standard pipes, among others. Moreover, the specifications can be customized according to actual requirements, with square non-standard pipe sizes ranging from 2020mm to 600600mm and thicknesses varying from 1.0mm to 35mm. Rectangular, elliptical, and other non-standard pipes also offer a broad selection of specifications.