Indus Industrial Group supplies heavy-duty Watertight and Gastight Bolted Ductile Iron Pressure Manhole Covers and Frames engineered in standard clear opening diameters of 600mm and 800mm in load classifications Class C250 and Class D400 (400 kN) according to EN 124-2 standards. Designed specifically for flood-prone urban road depressions, municipal sewage lift stations, sewer siphon chambers, and industrial chemical sumps across Iraq, these covers feature a continuous O-ring elastomeric seal and multiple high-tensile stainless steel perimeter locking bolts. The bolted sealing system prevents sewer odor and toxic hydrogen sulfide (H2S) emissions from escaping while blocking external stormwater floodwaters from inundating the sewer network.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Governing Standards | EN 124-1/2:2015 / ISO 1083 / DIN 19584 (Watertight/Gastight) |
| Load Classification | Class D400 (400 kN / 40 Metric Tons) & Class C250 |
| Clear Opening Sizes | 600 mm (24") and 800 mm (32") Internal Diameter |
| Watertight Pressure Rating | Certified up to 1.0 Bar (10m water column head) |
| Gastight Specification | 100% gastight against H2S, methane, and sewer gas odors |
| Material Grade | Spheroidal Graphite Iron EN-GJS-500-7 (min 500 MPa tensile strength) |
| Sealing Gasket | Continuous NBR (Hydrocarbon/Sewage Resistant) / EPDM O-Ring |
| Fastening System | 4 to 8 Stainless Steel AISI 304/316 Hex-Head Bolts with Brass Bushings |
| Surface Protection | Fusion-Bonded Epoxy / Heavy Bituminous Protective Coating |
| Lifting Technology | Threaded blind lifting holes preventing water penetration |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | Ductile Iron Manhole Covers |
Low-lying flood-prone highway underpasses, municipal sewage lift station chambers, odor-sensitive residential boulevard manholes, industrial wastewater treatment basins, and telecommunication cable vaults across Baghdad, Erbil, Basra, Najaf, Karbala, and Kirkuk.
Watertight and Gastight Bolted Ductile Iron Manhole Covers provide the vital environmental and hydraulic barrier for sewer interceptors, odor-sensitive municipal locations, and stormwater flood zones across Iraq. In low-lying urban areas in Baghdad, Basra, and southern governorates, seasonal flash floods submerge roadways, allowing massive volumes of surface runoff to pour into standard ventilated manholes, overloading municipal wastewater treatment plants (WWTPs) and causing raw sewage overflows. Furthermore, in hot summer temperatures exceeding +50°C, septic sewer mains generate pungent, toxic hydrogen sulfide (H2S) and methane gases that escape through conventional covers, endangering residents and causing public health complaints.
Indus bolted watertight covers solve both challenges with an engineered hermetic pressure seal. The cover is secured to the frame by 4 to 8 high-tensile stainless steel (AISI 304 / 316) hex bolts that compress a thick continuous NBR or EPDM O-ring gasket seated in a precision-machined groove. This achieves certified watertightness against internal and external hydrostatic water heads up to 1.0 to 2.0 Bar (10 to 20 meters of water head) and total gastightness against noxious odors.
Cast from high-tensile ductile iron (EN-GJS-500-7) with Class D400 (40-ton) heavy traffic rating, the cover resists heavy highway wheel loads without seal deflection. Staged across our Erbil Heavy Yard, Baghdad Central Logistics Depot, and Basra Port Corridor, Indus supplies watertight covers with lifting keys, replacement gasket kits, and full EN 124 inspection certification.
The cover is clamped tightly against a continuous NBR O-ring gasket by high-tensile stainless steel bolts. The seal creates an airtight pressure boundary that completely traps hydrogen sulfide and methane gases inside the sewer trunk, eliminating foul odors in residential and commercial streets.
No. The stainless steel bolts lock the cover mechanically to the frame, preventing it from floating or dislodging even if the street is submerged under deep floodwaters. The O-ring prevents surface rainwater from infiltrating the sewer network and overloading wastewater treatment plants.
Whenever maintenance crews open the cover, the O-ring groove should be wiped clean of sand and grit before re-securing the bolts. Indus supplies replacement NBR O-ring kits and stainless steel bolt sets from our Erbil, Baghdad, and Basra facilities.
