Civil Engineering - Waste Water Engineering - Discussion

Please explain me how it is 15 cm ?

Min diameter of the sewer is 15 cm.

Max diameter of the sewer is 300 cm.

The principal materials used in the manufacture of sewer pipe are asbestos cement, ductile iron, reinforced concrete, prestressed concrete, polyvinyl chloride, and vitrified clay. Minimum sewer sizes are usually specified in local building codes. Building sewer connections vary in size from 100 to 150 mm. The minimum size recommended for gravity sewers is 200 mm although 150 mm connections have been used in some communities.

Type of pipe size range in mm.

Asbestos cement 100-900.
Ductile iron 100-1350.
Reinforce concrete 300-3600.
Prestressed concrete 400-3600.
Polyvinyl chloride 100-375.
Vitrified clay 100-900.

What about SWGP, generally we have used SWGP pipes for Sewer line?

Size: Sanitary sewer mains shall be of adequate size to convey population generated (peak dry weather) flows, plus a general allowance for inflow and infiltration, plus an allowance for inflow allowance for manholes in sag locations. The inside diameter of sanitary sewer pipes must measure at least 200 mm.

Diameter of sewer pipes is based on the velocity of flowing sewer. Sewer pipe size is reducing velocity is high.

15cm to 25cm = 1m/s.

Is it right that max dia of sewer 300 cm?

Which IS code recommends this 15 cm please tell me?

Min 15cm.
Max 300 cm.
As per Indian Standard.

@Viru.

Can you please mention the IS code you are referring here?