Introduction of Slip-on Flange Forging Methods
This technical article introduces us about some main forging methods of slip-on flanges according to the movement of the forging die.
How to Correctly Select Flange
This technical article introduces us in details about that some main ways and methods that we can choose and select flanges correctly.
Thin-walled SS Tube Is Increasingly Widely Used
With the implementation of reform and opening policy and the development of economy, thin-walled stainless steel tubes are more and more popular.
Venezuela's Manufacturer Will Set Up Factories in Cuba
The company is evaluating the factory of the pipeline construction project, thus it is going to set up factories in Cuba.
NDRC: Increase Gas Imports and Oil Reserves in Winter
The National Development and Reform Commission decided to increase gas imports and oil reserves in this winter in the meeting held on November 13.
How to Clean the Rust of Large Stainless Steel Flange
Check after order and production can prevent and find the existence of free iron, ASTM standards A380 [3] stipulate test method of iron or steel particles on the surface of stainless steel. When the requirements require iron must not exist. When iron is required not to exist, you should use this inspection method. If the result is satisfactory, it should be appropriate to clean the surface by the application of clean water or nitric acid until the dark blue disappear completely. As the standard A380 [3] indicates if the rust test solution can't be cleared completely clean, it is not recommended to touch directly on the surface of equipments’ craft. The simpler test method is to expose in the water about 12 to 24 hours so as to check whether there is a rusty spot or not. This kind of test sensitivity is poor and time-consuming. These are detection test rather than a cleaning method. If it is found that there is iron, we must clean it up by means of the chemical and electrochemical methods.
