Pre-insulate pipe construction and installation requirements and air tightness experiment and how to do?
About joint there are three orders, which cannot be reversed. First do the outer protective layer of the joint, then do the airtightness experiment of the outer protective layer. Finally, through this foaming hole, do the joint insulation.
how to do?
Let's look at the picture of the scene, first of all, the pipe is well done and the strength experiment is qualified, and the corrosion in the picture has been completed. then we are now going to fix this joint.
First by electric fusion connection, let the outer layer and PE pipe connection, and then, as shown in the video, form a cavity. this cavity is filled with compressed air through a reserved foaming hole.
Now what you're looking at is the instrument 0.02 megapascals of air is pushed in through this. The compressed air is kept under pressure for two minutes after entering. Then we can see that the video is spraying soapy water on the part.
Revi: Synchronous Coating of Internal and External FBE powder for steel pipe anticorrosion
Next: The attractive of Huashida hall-off for HDPE Jacket extrusion line