Biology

Also known as a helical cylinder or helical body. The outer diameter of the helical tube is approximately 30 nanometers, the inner diameter is about 10 nanometers, and the spacing between adjacent helices is approximately 11 nanometers. Each turn of the helical tube is composed of 6 nucleosomes, with H1 histone located on the inner surface of the helical tube cavity, playing a crucial role in maintaining the structure of the helical tube. The 10-nanometer fibers composed of nucleosomes spiral into 30-nanometer thick fibers, further compressing the DNA length by a factor of 6.

Industrial Pipe

Spiral Pipe

Helix pipes are mainly used for oil and natural gas transmission pipelines, with their specifications denoted by outer diameter * wall thickness. Helix pipes come in single-sided and double-sided焊接 varieties. Welded pipes must ensure that water pressure tests, tensile strength of welds, and cold bending properties meet the requirements.