En124 Custom Size Safety Municipal Heavy Duty Drain Manhole Cover
|FOB Price:||US $65-900 / Piece|
|Min. Order:||1 Piece|
|Min. Order||FOB Price|
|1 Piece||US $65-900/ Piece|
|Payment Terms:||L/C, T/T|
- Model NO.: JZ-MC-01
- Casting Form Material: Sand
- Casting Form Usage Count: Permanent
- Surface Roughness: Ra0.1
- Machining Tolerance: +/-0.01mm
- Certification: ISO 9001:2008
- Material: Steel/Galvanised/Polypropylene
- Character: Hinging
- Drain: Leak Proof
- Specification: C250, D400, E600 and F900
- HS Code: 7325999000
- Casting Method: Sand Casting
- Casting Metal: Stainless Steel/Ductile Iron
- Surface Treatment: Sand Blast
- Coating: Black Bitumen, Epoxy and Other Paint as Per The Ra
- Standard: BS/DIN/ANSI
- Type: En124 D400 Manhole Covers
- Size: 600mmx600mm to 900mm X3300mm
- Key: Locking Provision Available
- Transport Package: Wood Pallet
- Origin: China
Manhole covers are often made out of cast iron, concrete or a combination of the two. This makes them inexpensive, strong, and heavy, usually weighing more than 50 kilograms (110 lb). The weight helps to keep them in place when traffic passes over them, and makes it difficult for unauthorised people without suitable tools to remove them.
Manhole covers have different weight classes depending on their application. For example, a Class A15 (cast iron) manhole cover can withstand a maximum weight of 1.5 tonnes. It would typically be restricted to light duty applications, such as in pedestrian areas, gardens, patios and driveways; whereas a F900 class manhole cover would typically be used in docks, airports and other extreme heavy-duty applications.
Manhole covers may also be made from glass-reinforced plastic or other composite material (especially in Europe, or where cover theft is of concern). Because of law restricting acceptable manual handling weights, Europe has seen a move towards lighter weight composite manhole cover materials, which also have the benefits of greater slip resistance and electrical insulating properties.
A manhole cover sits on a metal base, with a smaller inset rim which fits the cover. The base and cover are sometimes called "castings", because they are usually made by a casting process, typically sand-casting techniques.
The covers usually feature "pick holes", into which a hook handle tool is inserted to lift them. Pick holes can be concealed for a more watertight lid, or can allow light to shine through. A manhole pick or hook is typically used to lift them, though other tools can be used as well, including electromagnets.
Although the covers are too large to be easily collectible, their ubiquity and the many patterns and descriptions printed on them has led some people to collect pictures of covers from around the world. According to Remo Camerota, the author of a book on the subject titled Drainspotting, 95% of Japanese municipalities have their own cover design, often with colorful inlaid paint.
Despite their weight and cumbersome nature, manhole covers are sometimes stolen, usually for resale as scrap, particularly when metal prices rise
Q:How much does a manhole cover weigh?
A manhole cover typically weighs between 90 and 150 pounds, according to Government Security News. At 450 pounds per cubic foot, a 32-inch cast-iron manhole cover can weigh up to 250 pounds.Q:Why are manhole covers round instead of square?
The main reason that manhole covers are round is because a round cover cannot slip through the hole, whereas a square cover could slip through the hole diagonally.
Q:What is an engineering standard?
An engineering standard is a document that outlines specifications and technical details that must be met by products, processes and systems that the standard covers. Developing and adhering to standards promote efficiency, reliability, productivity and safety in the engineering field.
Vicky ChenPostion:Fluid Specialist
Qingdao JunZheng Machinery Manufacture Co.,Ltd
Phone+86 :0532 68002371