1. the direction of air flow in the ventilation pipe. The valve opening and closing direction and opening degree shall be marked clearly and accurately.
2. Ji'nan ventilation pipe project in the first closed valve to the mouth of the pipe and fittings should be welded by thick 2-3mm steel plate, the weld should be full, uniform, tight.
3. the pressure measuring pipe of the project shall be provided with a downward elbow at one end of the protective airtight door, and the other end shall be arranged in the ventilation room or the control room, and the ball valve shall be installed. Through the measuring tube of the gas passage, the interface shall be welded.
4. the ventilation duct in the contaminated area shall be welded. The ventilation pipe and the airtight valve should be connected with flange with airtight groove, and the contact should be smooth. The flange washer should adopt the whole circle without interface rubber sealing ring.
5. determination holes for ventilation pipes. Wash out sampling tubes shall be made simultaneously with tubes. The measuring hole and the decontamination sampling tube shall be sealed.
6. the thickness of the steel plate of the ventilation pipe and fittings shall comply with the design requirements. When the design has no specific requirements, the steel plate thickness should be greater than 0.75mm.
Flange material should be classified code method, open to prevent rain and snow measures should be taken to reduce the phenomenon of rust. The ventilation pipe should be stacked without water in the flat, spacious venues should be stacked according to system number, orderly, reasonable and convenient for shipment.
It should also be noted that the paint film should be made even, without any defects such as accumulation, leakage, wrinkles, bubbles and mixed colors. Ordinary steel plate must be sprayed at the mouth of a rust proof paint, to ensure that the joints are not easy to rust.
To keep the galvanized steel surface smooth and clean, put on the spacious dry wooden shelf, stacked neatly. Stainless steel plate, aluminum plate to depending on the gallows, not flat, so as not to drive when scratching the surface, should use the scribing tool does not produce scratches when feeding. The operation should use wooden hammer or rubber leather hammer, hammer shall be used, so as not to drop point rust.
This article is provided by the Ji'nan ventilation pipeline project. Our website is: http://www.jnqsg.com/, we will provide you with better service with your wholehearted enthusiasm, and welcome your visit!