建筑问答（Building qa）.docVIP

建筑问答（Building qa） 1. Ensure good hydraulic conditions and make economic sense; 2. Meet the requirements of aesthetics and maintenance; 3. To meet production and use safety; Ensure that water quality is not contaminated or not affected. 5. Protect the pipeline from damage; 6. Clear and dark piping for piping; 7. The pipe laying should also be noted for the problem (such as a. Water supply horizontal pipe through the load-bearing wall or the foundation and the riser through the floor shall be reserved for holes). 2 meter: (to determine the choice of water meter type and diameter) in water evenly, water meter caliber water meter section should be installed in the design of the second common flow to determine the flow rate is not greater than the water meter, because the common flow meter is allowed for a long period of time through the traffic; In the water when not in uniform, and the peak load of continuous less than 2-3 hours every day and night, screw type water meter can design according to the second traffic flow of overload is not greater than the water meter to determine water meter diameter, because overload flow meter is allowed in a short period of time through the traffic. In the life, fire public system, because the fire flow only in the case of a fire through the meter, so the selected table section design flow does not include fire control flow, but after the selected meter diameter, should add fire flow to carry on the review, meet life and fire fighting design second flow of no more than the sum of water meter overload flow value. 3. Basic steps of hydraulic calculation: 1. Select the most unfavorable distribution points and determine the calculation pipeline; 2. Start with the worst water distribution point and mark the node number and mark the length of the calculation tube; Calculate the flow rate of each pipe segment according to the equivalent number of the sanitary appliance; 4. The hydraulic calculation of water supply pipe network is carried o