Ellipse Tube Manufacturer, Zinc Coated Strip Flat Ellipse Tube, Special Shape Ellipse TubeThe following are some national standards related to elliptical tubes: 1. **Ellipse Deviation Regulations**: - When the tube diameter is 159mm or more, the allowable deviation for ellipse deviation is 1%. - When the tube diameter is less than 159mm, the allowable deviation for ellipse deviation is 1.5%. Ellipse deviation refers to the deviation between the major and minor axes of the elliptical steel tube cross-section, reflecting the roundness of the tube cross-section shape. This is a key parameter for measuring the shape deviation of elliptical tubes. 2. **Material Standards**: - For stainless steel seamless elliptical steel tubes, they should comply with standards such as GB/T 14976 for stainless steel tubes. This standard provides detailed provisions for the dimensions, shape, weight, allowable deviation, technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates of stainless steel seamless tubes. - For carbon steel seamless elliptical steel tubes, they should comply with standards such as GB/T 8162 for carbon steel tubes. GB/T 8162 stipulates the dimensions, shape, weight, technical requirements, testing methods, inspection rules, packaging, marking, and quality certificates for structural seamless steel tubes, which are suitable for seamless steel tubes used in general structures and mechanical structures. In practical applications, different industries may have varying requirements for elliptical tubes, but the aforementioned national standards provide the basic basis and specifications for the production, inspection, and use of elliptical tubes.