天天乐棋牌 What are the conditions before the installation of the ventilation pipe?
1。 、 civil engineering work related to the pipeline shall be inspected and qualified to meet the installation requirements;
2. design documents and other technical documents are complete, the construction plan has been mixed, the construction organization design completed and approved;
3。。 The equipment connected with the pipe is installed in place and fixed。 The elevation, center line and nozzle orientation meet the design requirements;
4. necessary procedures such as cleaning, degreasing, internal corrosion protection and lining must be completed before the pipeline is installed;
5。 pipes, fittings and valves have been inspected and have relevant technical certificates;
6. pipes, fittings and valves have been checked according to the design requirements, the internal cleaning has been done, no debris;
7. the excavation of the underground pipe ditch is completed and the pipe gallery is completed.
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