What should be paid attention to when purchasing stainless steel elbows?
You must clearly choose the right stainless steel elbow when purchasing stainless steel elbows and take a look at the common precautions.
Stainless steel elbow is a common type of stainless steel pipe and fittings. According to the angle, there are three most commonly used 45° and 90°180°. In addition, according to engineering needs, it also includes other abnormal angle elbows such as 60°. In addition, according to the process and use, it can also be divided into stamping elbow, high pressure socket elbow, butt welding elbow, sanitary elbow, etc.
I. Material: There are many kinds of materials for stainless steel elbows. The most commonly used ones are 201, 304 and 316. 316 has more Mo than 304 chemical elements, and it is also used in different countries such as national standard, American standard, and German standard. Standard, these appearances are difficult to distinguish, and the price difference is relatively large. At present, there are still manufacturers who use syrup to distinguish when selecting raw materials, but there will be errors. The best way is to use a professional spectrometer to detect. High and easy to use.
II. Specification: In addition to determining the material, there are also size issues such as specifications and thickness. Most buyers do not have the technical support to check the product size. Take the most common 90-degree stainless steel elbow, the normal R=1.5D, but most manufacturers use molds in the market that are 1.25D, which is shorter than the standard size. Regardless of the 0.25D, there is a gap in the weight of the blanks. The reduced weight is the manufacturer's more profit. This should be paid attention to when purchasing. Of course, it does not rule out that you do need to purchase special non-standard products.
Although buyers often feel that they meet the standards after the inspection, they ignore one aspect, that is, the wall thickness of the back arc is insufficient. This is because there will be wall reduction in the elbow push system. Although the caliber barely meets the standard, most of the back is not thick enough, usually the manufacturer is relatively clear.
III. Delivery time: The customer estimates the processing time for the processing master according to the urgency of the order. Only the processing master also accepts, the transaction can be completed, otherwise it will only delay each other's time.