Specifications and appearance quality standards that high-precision cold-drawn tubes must meet: No matter what product is produced, there are relevant regulations to define it, including product size, specifications, quality, etc. Only qualified products can be launched into the market for application. Take cold-drawn tube manufacturers as an example, what requirements need to be met for the specifications and appearance quality of cold-drawn tube products? Regarding the specifications of cold-drawn tubes, relevant regulations have been issued. In terms of length, if the wall thickness of the cold-drawn tube is 0.5～1.0mm, the length should be controlled within 1.0～7m; if the wall thickness is greater than 1.0mm, the length can be extended to 1.5～8m. In terms of diameter, the diameter of cold-drawn tubes can be controlled within 6～200mm; and the wall thickness can also be maintained within 0.5～21mm. It can be seen that there are many options for the specifications of cold-drawn tubes. Regarding the surface quality of cold-drawn tubes, in addition to the absence of obvious defects such as cracks, folds, crazing, cracks, rolling folds, delamination, scars, etc., the negative deviation of the tube wall thickness and outer diameter shall not exceed the specified range. Only after meeting the above requirements can it be regarded as a qualified cold-drawn tube product.