CIRCULAR MANHOLES FOR STORM/SWEAGE LINE
Circular Manhole elements are commonly used for Storm or Sewerage water lines. Normally circular manholes are either as per Municipality specification or Ministry of water specification. Storm water manholes are with internally without any lining or coating. Whereas manholes for sewerage lines are with internally coated Coal Tar Epoxy or lined with HDPE/GRP lining. All manholes are externally coated either Bitumen or Coal Tar Epoxy as protective coating
Manholes are with various depths as per requirements. Depths more than the height of Base shall be managed with raiser rings. Raiser rings will be available with standard height of 1200mm, 900mm, 600mm and 300mm for all diameter of manholes.
MUNICIPALITY STANDARDS
| INNER DIAMETER | WALL THICKNESS | BASE THICKNESS | HEIGHT | INTERNAL COAT | EXTERNAL COAT |
| I.C 600 | 150 | 150 | 1000 | NON-COATED COAL TAR EPOXY HDPE LINING GRP LINING | BITUMEN COAL TAR EPOXY |
| I.C 900 | 200 | 200 | 1000 | ||
| 1000 | 200 | 200 | 1200 | ||
| 1200 | 200 | 200 | 1200 | ||
| 1500 | 250 | 300 | 1500 | ||
| 2000 | 250 | 300 | 2000 | ||
| 2500 | 300 | 300 | 2000 | ||
| 3000 | 300 | 300 | 2000 |
*All measurements are in millimeters
MINISTRY OF WATER SPECIFICATION
| INNER DIAMETER | WALL THICKNESS | BASE THICKNESS | HEIGHT | INTERNAL COAT | EXTERNAL COAT |
| I.C 600 | 200 | 250 | 1200 | NON-COATED COAL TAR EPOXY HDPE LINING GRP LINING | BITUMEN COAL TAR EPOXY |
| I.C 900 | 250 | 300 | 1200 | ||
| 1200 | 300 | 350 | 1500 | ||
| 1500 | 300 | 350 | 1950 | ||
| 2000 | 300 | 350 | 2500 | ||
| 2500 | 300 | 350 | 2500 | ||
| 3000 | 300 | 350 | 2500 |
*All measurements are in millimeters
