What are the different parameters that are considered in the sewer design?

What are the different parameters that are considered in the sewer design?

Manning’s Equation

BAZIN’S CONSTANT (K)
	Nature of the inside of the sewer	K Value
1	Very smooth	0.109
2	Smooth with bricks & concrete	0.290
3	Smooth with rubble	0.833

How do you design a sewer?

1. Design of Sewers. The hydraulic design of sewers and drains, which means finding out their sections and gradients, is generally carried out on the same lines as that of the water supply pipes.
2. Minimum Velocity.
3. Maximum Velocity.
4. Effects of Flow Variation on Velocity in a Sewer.

What are the factors to be considered while selecting material for sewer pipes?

The selection of material for the sewer pipe is governed by the following factors:

• Carrying capacity of the pipe.
• Durability, strength, and life of the sewer pipe.
• Imperviousness and weight.
• Resistance to corrosion and abrasion.

What are the design velocities of sewer pipes?

Required velocities at design flow (Q) for sewer pipelines shall be minimum 2 fps and maximum 10 fps. The maximum velocity at design flow allowed in any sewer pipeline is 10 fps. Do not increase sewer sizes in flat topography, to justify use of flatter grades.

What is the minimum permissible sewage flow in a sewer line?

In arid regions, mean sewage flows may be as little as 40% of water consumption and in well developed areas; flows may be as high as 90%. However, the conventional sewers shall be designed for a minimum sewage flow of 100 litres per capita per day or higher as the case may be.

What is sewer design?

Design of Sewers The hydraulic design of sewers and drains, means finding out their sections and gradients, is generally carried out on the same lines as that of the water supply pipes. However, there are two major differences between characteristics of flows in sewers and water supply pipes. 4. Hydraulic formulae 1.

What are the requirements of pipe material?

Process Conditions for Pipe Material Selection Corrosive fluids such as – crude oil, Sea Water, H2S, Ammonia, Acids, etc. required high corrosion resistance material. On the other hand, normal carbon steel is enough for Non-Corrosive fluids such as – Lube oil, Air, Nitrogen, etc.

What considerations will you consider in choosing the kind of pipe and fitting to be installed?

THE TOP 4 FACTORS TO CONSIDER WHEN CHOOSING A PLUMBING PIPE

• WATER TYPE. Depending on where you live, the water going through your pipes may be corrosive.
• PLUMBING USE.
• SOIL CHARACTERISTICS.
• EXPOSURE TO SUNLIGHT.

What is the slope for sewage pipe?

¼ inch per foot
You probably know that drains need to flow downhill into your sewer. But do you know the proper slope? The ideal slope of any drain line is ¼ inch per foot of pipe. In other words, for every foot the pipe travels horizontally, it should be dropping ¼ inch vertically.

What is minimum slope for sewer pipe?

For 4-inch PVC piping and a building sewer less than 50 feet long, the minimum slope is 1 inch in 8 feet, or 1/8-inch per foot, and the maximum is 1/4-inch per foot. For sewers longer than 50 feet, the slope should be 1/4-inch per foot.