IS 13496:1992 is the Indian Standard (BIS) for general requirements of suction machine for cleaning sewers, manholes and ancillary structures provided on sewer line and closed stormwater drains. This standard specifies the material, construction, performance, and testing requirements for suction machines used for cleaning sewers and manholes. It covers key components like the debris tank, vacuum pump, drive system, and suction hoses, ensuring the equipment is safe and effective for municipal and public health engineering applications.
General requirements of suction machine for cleaning sewers, manholes and ancillary structures provided on sewer line and closed stormwater drains
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Debris Tank Material | Mild steel plate conforming to IS 2062. | Various approved carbon steels, stainless steels, or alloys with specified design stresses (e.g., SA-516 Grade 70). | ASME BPVC Section VIII, Div 1 |
| Tank Wall Thickness Design | Prescriptive: 6 mm for shell and 8 mm for dished ends for specified capacities. | Calculation-based, determined by external design pressure (full vacuum), diameter, material properties, and stiffening ring requirements. | ASME BPVC Section VIII, Div 1 |
| Required Vacuum Level | Minimum 600 mm of Hg (approx. 80% vacuum). | Not typically standardized; it's a manufacturer-rated performance characteristic. DIN 30705 requires the achieved vacuum to be stated by the manufacturer. | DIN 30705:2015 |
| Tank Pressure Test | Hydrostatically tested to 0.5 kgf/cm² (approx. 0.5 bar). | For external pressure design, the vessel must be proven to withstand full vacuum. Hydrostatic proof test pressure is typically 1.3 times the Maximum Allowable Working Pressure (MAWP) for internal pressure design. | ASME BPVC Section VIII, Div 1 |
| High-Pressure Jetting System | Mentioned as an optional fitment without specific pressure/flow requirements. | Detailed requirements for max working pressure, pressure limiting devices, hose safety factors, and operator controls. | EN 15091:2006 |
| Operator Safety Controls | General requirement for controls to be located at a convenient position. | Requires clearly marked, protected controls to prevent unintentional activation and an accessible emergency stop for the high-pressure system. | EN 15091:2006 |
| Level Indication | A full-length toughened glass level indicator is specified. | Requires a level indicator; float-type or sight glass are common. DIN 30705 requires the indicator to be readable from the control stand. | DIN 30705:2015 |