We have manufactured manhole covers for petroleum tankers for over 50 years and these features have evolved through our experience and consultation with international oil companies, which nearly all use the EMCO Wheaton design.
Manhole covers are arguably the most important safety component fitted to a vehicle’s tanker. EMCO Wheaton models include emergency venting to prevent tank explosion if a fire occurs (7000m³/hr at 350 mb), as well as a pressure vacuum breather to complete with rollover seal to stop leakages if a tank is overturned. Operators are also kept safe by a two-stage opening mechanism that releases residual pressure before fully opening. This stops dangerous kick-backs.
Our cast option includes blind bolt holes to ensure no liquid cargo can leak through and webs on the underside of the base plate to increase structural integrity. The springs used for the emergency venting are corrosion-proof, assuring correct operation regardless of environment.
Other key features include:
Raised seal face that prevents water dripping into the tank compartment
Generous 10-inch (245mm) fill opening for easy insertion of loading arm drop pipe if needed.
Fill cap with water drainage lip to prevent contamination
ADR compliant
Technical Info
Technical Info
Manhole covers are made of aluminium and come in 16-inch and 20-inch sizes. Variants include:
F033* - 16" Round Manhole Cover
F0512 - 20" Round Manhole Cover with Vapor Vent Pad
Manhole covers can be supplied in either left-hand or right-hand configuration along with lockable feature. Please contact us for more options.
Relative compliance and approvals:
AS 2809-2-1990 (Australian droop test)
Emergency fire engulfment venting to NTTC DOT 406
EN13114/EN13317
EN13094
ATEX – EN13463-1
Applications
Applications
EMCO Wheaton’s range of manhole covers are internationally accepted and specified by oil companies around the world, assisting with the safe conveyance of petroleum-based products.
Aftermarket
Aftermarket
We offer a range of original spares and repair kits to ensure equipment is maintained in top working condition . This is especially important for keeping critical equipment, like emergency vents for fuel tanks, fully operational and your operators safe should the worst occur.
Global (EN)
