Generally, we will see "Φ" and "DN" in the orders of stainless steel pipe engineering customers. So what is the specific difference between "Φ" and "DN"?
1. "Φ" and "DN" have different meanings. "Φ" and "DN" are generally used to indicate the diameter in stainless steel pipe specifications. "Φ" identifies the diameter of an ordinary circle, often the outer diameter of stainless steel pipes, and "DN": identifies the nominal diameter of pipes and valves and other fittings. , usually close to the inner diameter, is a standard term established for engineering installation support. Φ is the outer diameter, and DN refers to the inner diameter, the nominal diameter.
2. The stainless steel pipes represented by "Φ" and "DN" are different types. "Φ" is usually stainless steel round pipe, usually decorative stainless steel pipes and finished stainless steel pipes, while "DN" is usually the specification data of stainless steel products such as seamless stainless steel pipes, water pipes or pipe fittings and valves.
3. "Φ" and "DN" directly determine the different uses of stainless steel pipes. "Φ" is used in the field of decorative stainless steel pipes and finished pipes. And "DN" generally refers to the field of stainless steel fluid pipes, seamless stainless steel pipes or pipe fittings.
If you need high quality stainless steel pipes or other stainless steel pipes products manufacturer & long-term oversea partner, please
contact us:https://www.cunrui-steels.com