Underground Drainage & Sewerage Pipes
Conforming to IS 15328
Finolex underground drainage & sewerage pipes are intended to carry soil and waste from building to sewers or drains and then to treatment plants or disposal points. These pipes are available in sizes 110, 160, 200, 250 and 315 mm in stiffness classes of SN-2, SN-4 & SN-8 and conform to IS 15328. Sewerage pipes come with selfit and ringfit sockets in a standard length of 3 & 6 meters. Selfit pipes are self-socketed and can be joined with the help of solvent cement; while Ringfit pipes need no solvents for jointing and can withstand high pressures. Sewerage ringfit pipes are made with EPDM rubber rings that are long lasting and can withstand high pressures. Please refer to the diagrams and illustrations below to ensure the correct application of Finolex Plumbing Underground Drainage & Sewerage Pipes.You can follow the step-by-step guide at the bottom of this page or refer the product brochure for detailed instructions.
Dimensions of Underground Pipe
| DIMENSIONS OF SELFIT SEWERAGE PIPES CONFORMING TO IS 15328 | |||||||||
| SN 2 (SDR 51, STIFFNESS CLASS 2 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 3.2 | 3.7 | 8503 | 6 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 3.9 | 4.5 | 8504 | 6 |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 3.2 | 3.7 | 8501 | 3 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 3.9 | 4.5 | 8502 | 3 |
| SN 4 (SDR 41, STIFFNESS CLASS 4 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 4.0 | 4.6 | 8507 | 6 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 4.9 | 5.6 | 8508 | 6 |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 4.0 | 4.6 | 8505 | 3 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 4.9 | 5.6 | 8506 | 3 |
| SN 8 (SDR 34, STIFFNESS CLASS 8 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 110 | 4" | 110.0 | 110.4 | 108.6 | 111.4 | 3.2 | 3.7 | 8512 | 6 |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 4.7 | 5.4 | 8513 | 6 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 5.9 | 6.7 | 8514 | 6 |
| 110 | 4" | 110.0 | 110.4 | 108.6 | 111.4 | 3.2 | 3.7 | 8509 | 3 |
| 160 | 6" | 160.0 | 160.5 | 158.0 | 162.0 | 4.0 | 4.6 | 8510 | 3 |
| 200 | 8" | 200.0 | 200.6 | 197.6 | 202.4 | 4.9 | 5.6 | 8511 | 3 |
| DIMENSIONS OF RINGFIT SEWERAGE PIPES CONFORMING TO IS 15328 | |||||||||
| SN 2 (SDR 51, STIFFNESS CLASS 2 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 250 | 10" | 250.0 | 250.8 | 247.0 | 253.0 | 4.9 | 5.6 | 8515 | 6 |
| 315 | 12" | 315.0 | 316.0 | 311.2 | 318.8 | 6.2 | 7.0 | 8516 | 6 |
| SN 4 (SDR 41, STIFFNESS CLASS 4 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 250 | 10" | 250.0 | 250.8 | 247.0 | 253.0 | 6.2 | 7.0 | 8517 | 6 |
| 315 | 12" | 315.0 | 316.0 | 311.2 | 318.8 | 7.7 | 8.7 | 8518 | 6 |
| SN 8 (SDR 34, STIFFNESS CLASS 8 KN/m²) | |||||||||
| Nominal Outside Diameter “D” in nominal | Mean Outside Diameter (mm) | Outside Diameter at any point (mm) | Wall Thickness “T” in mm | Material Code |
Std. Pipe Length |
||||
| (mm) | (inch) | Min | Max | Min | Max | Min | Max | meter | |
| 250 | 10" | 250.0 | 250.8 | 247.0 | 253.0 | 7.3 | 8.3 | 8519 | 6 |
| 315 | 12" | 315.0 | 316.0 | 311.2 | 318.8 | 9.2 | 10.4 | 8520 | 6 |
Batch Number logic:
| Year | Month | Day | M/c No. | Shift | Die No. / Location |
|---|---|---|---|---|---|
| XXXX | XX | XX | XXX | X | X/XX |
For example: The Batch Number of pipes produced on M/c no. 20 on 1st June 2025 in the 1st shift will be 202506010201 U
