- stainless steel pipe surface quality:
stainless steel pipe sheet is a low-cost material, but customers have very high requirements for its surface quality. Various defects such as scratches, pits, sand holes, dark lines, creases, and pollution are inevitable in the production process of stainless steel pipe, resulting in surface quality defects such as scratches, creases, and other defects that are not allowed to appear in high-grade materials. Defects such as pits and sand holes are also not allowed in spoons, spoons, forks, and production, because polishing
It’s difficult to throw it away when it’s light. We determine the surface quality level based on the degree and frequency of various surface defects, in order to determine the product grade
stainless steel pipe thickness tolerance:
Generally speaking, different types of stainless steel products require different thickness tolerances for raw materials, such as Class II tableware and insulation cups. The thickness tolerance is generally required to be high, ranging from -3% to 5%, while Class I tableware generally requires a thickness tolerance of -5%, steel pipes require -10%, and hotel refrigerators require a thickness tolerance of -8%, The thickness tolerance requirements of distributors are generally between -4% and 6%. At the same time, the differences in product internal and external sales can also lead to different customer requirements for raw material thickness tolerance. Generally, export product customers have higher thickness tolerance requirements, while domestic sales enterprises have relatively lower thickness tolerance requirements (mostly due to cost considerations), and some customers even require -15%.
- stainless steel pipe weldability:
The requirements for welding performance vary depending on the purpose of the product- Class tableware generally does not require welding performance, and even includes some pot enterprises. But the vast majority of products require materials with good welding performance, such as second-class tableware, insulation cups, steel pipes, water heaters, water dispensers, etc.
Corrosion resistance of stainless steel:
The vast majority ofstainless steel pipe products require good corrosion resistance, such as first and second class tableware, kitchenware, water heaters, water dispensers, etc. Some foreign merchants also conduct corrosion resistance tests on the products: heating NACL aqueous solution to boiling, pouring out the solution after a period of time, washing and drying, weighing the weight loss, to determine the degree of corrosion (note: during product polishing, rust spots may appear on the surface during testing due to the presence of Fe in sandcloth or sandpaper)
- stainless steel pipe polishing performance:
In today’s society, stainless steel pipe products are generally polished during production, and only a few products such as water heaters and water dispenser liners do not require polishing. Therefore, this requires good polishing performance of the raw materials. The main factors affecting polishing performance include: 1. Surface defects of raw materials, such as scratches, pits, and excessive pickling. 2. The problem with the raw material is that the hardness is too low, making it difficult to polish, and the hardness is too low for deep stretching
When the surface is prone to orange peel phenomenon. 3. After deep stretching, the surface of areas with significant deformation will also show small black spots and RIDGING, thereby affecting BQ properties.