The MATERIALS FOR DPT TESTING IN PEB is discuss in this post. Dye Penetration Testing (DPT) is a test uses to identify the discontinuities in welding joints in PEB members. And uses to detect the cracks, fractures, pinholes, porosity, potholes, in PEB members.
The Dye Penetration Testing has many names like,
- The Liquid Penetrate Inspection
- The Penetration Testing
It is a simple test. And a easy test to identify the discontinuities in welding joints. And to detect the cracks, fractures, pinholes, porosity, potholes, in the PEB members. Using this method all the surface defects and the flaws are easily identify and rectify. This test carries out without difficulties. This is one of the oldest test for identification of the cracks, fractures, pinholes, porosity, potholes, in PEB members.
MATERIALS FOR DPT TESTING IN PEB
The MATERIALS FOR DPT TESTING IN PEB are as follows,
The Cleaner, Penetrant and Developer are the three main materials for this DPT testing. These are all Non toxic chemicals. And Eco friendly materials. Using these Cleaner, Penetrant and Developer DPT testing carries out.
The Cleaner is uses to clean the surface and connections of member. The specimen to test (PEB Member) cleans for applying of the Penetrant in welding joints. It must be free from dirt, dust, paint, oil, grease and other foreign materials. For this cleaning a organic chemical like acetone uses. It is a colorless and Non toxic chemical. And a portable material comes in spray cans and in tins.
The Penetrant is on of the main element in DPT testing. Penetrant is a Dye. Its a coloring agent. It is of a high contrast color. Penetrants are red in color. So that the indications seen clearly above the white developer.
It is a water washable type. And easily cleans after testing on the materials. Penetrant sprays on the welding joints and other connections of PEB members.
It allows to remains for three to five minutes on the member. This makes to get the penetrant sink into the cracks,pores,etc. This depends on the size of the PEB members to test.
The excess penetrant removes from the welding joints and other connections of PEB members. And Developer applies on the welding joints and other connections of PEB members.
The Developer is white in color. The developer applies quickly on to the surface of area. And welding joints to examine on the member. This carries out with spraying. The complete area of penetrant covers with spraying the white Developer. This application of developer carries out within one to two minutes after drying of penetrant.