-
The main purpose of the manhole cover is usually universal, and the actual effect is remarkable because of its production, processing and processing technology. In order to improve the quality of products, it is a core part to continuously enhance the safety hazards of technical products, Only by doing well in the pressure test of ductile iron manhole covers can they be delivered for use without problems: Hainan ductile iron manhole covers
Published on: January 30, 2022 Clicks: 21
-
Ductile iron manhole covers are generally divided into round and square ones. In terms of urban road administration, round manhole covers are generally used, because round manhole covers are not easy to tilt, which can better protect the safety of pedestrians and vehicles. The use of circle is mainly based on the fact that the length of each diameter of the round manhole cover passing through its center is the same, so if the manhole cover is rolled by the passing vehicle
Published on: January 30, 2022 Clicks: 53
-
The cast iron manhole cover is an upgraded version of the ordinary cast iron manhole cover, and now the nodular cast iron manhole cover is used on all major highways, national highways, and urban roads. This is also the pace of upgrading from cement manhole cover to cast iron manhole cover, and then from cast iron manhole cover to nodular cast iron manhole cover. It is an indispensable manhole cover equipment in municipal construction. Hainan nodular cast iron well cover
Published on: September 26, 2021 Clicks: 31
-
1、 Project overview 1. The gutter inlet is a double grate gutter inlet, and the surrounding area of the gutter inlet is reinforced with C25 concrete. The rainwater grate is made of heavy plastic steel composite material. The inner opening size of the grate base is 300mm × 550mm. Hainan ductile iron manhole covers 2. Inspection manhole covers are divided into two types, one is the manhole cover in the green belt. The second is the inspection well on the motorway
Published on: September 3rd, 2021 Clicks: 98
-
1) For brick masonry of manhole, manhole cover with inner diameter of 700mm shall be selected according to the size of manhole in the design drawings. Hainan nodular cast iron manhole cover 2) Determine the elevation of the top surface of the inspection well brickwork according to the thickness of the manhole cover and the height requirements of the top surface of the green belt filling. 3) Before installing the well cover in the green belt, it is required to have a certain thickness of fill in the green belt so as not to affect the installation of the well cover and well C25
Published on: July 25, 2021 Clicks: 57
-
In the so-called heavy type, it refers to the allowable pressure bearing capacity of 360kN or super steam - Grade 20 main vehicle in the delivery inspection; Light refers to the city where the pressure bearing 210kN or Class 10 main vehicle, Hainan nodular cast iron manhole cover and heavy airport, or highways and other special roads and sites for helicopters to take off and land are allowed to drive and park heavy vehicles
Published on: June 19, 2021 Clicks: 36
-
There are many kinds of well covers. When facing so many kinds of well covers, we will think of what is special about these well covers? So many manhole covers naturally exist at the same time. A manhole cover can survive in the market for a long time, which means that this kind of manhole cover will not be completely rejected. Otherwise, what's the significance of its existence? So how can we correct so many manhole covers
Published on: May 8th, 2021 Clicks: 54
-
At present, we can often see two kinds of manhole covers, one is the old cast iron manhole cover, the other is the ductile iron manhole cover. These two kinds of manhole covers are used in many projects. In terms of material, HT200 is used for the cast iron manhole cover, while the nodular iron manhole cover is processed with QT500-7. Generally speaking, the nodular iron manhole cover with the same weight is better than the gray iron manhole cover
Published on: April 19, 2021 Clicks: 46
-
Why is the anti-corrosion work of nodular cast iron manhole cover? According to the name, we can see that the manhole cover is made of nodular cast iron. In general, iron will rust, but the corrosion resistance of the nodular cast iron is greatly improved. In addition, if you simply do a corrosion prevention work, you can improve its service life
Published on: April 14, 2021 Clicks: 40
-
How to maintain the cast iron well cover? Now let's introduce the maintenance of cast iron manhole covers? Hainan nodular cast iron manhole cover The nodular cast iron manhole cover we usually see is made of cast iron plate. In order to prevent the cast iron plate from deformation, we need to know some methods to maintain the cast iron plate. We can maintain the cast iron plate from the following aspects
Published on: March 3, 2021 Clicks: 32
-
What is the standard and basis for the classification of light and heavy ductile iron manhole covers? Next, let's introduce Hainan Municipal Pipeline Department to you: First, let's understand what is a heavy ductile iron manhole cover: the experimental load is 400KN, corrosion resistance, aging resistance, acid and alkali resistance, large toughness, long life, high bearing capacity, not easy to deform, and good safety. 1. Application scope and occasions
Published on: April 1, 2020 Clicks: 192
-
Precautions for the installation of Hainan nodular cast iron manhole covers. Hainan nodular cast iron manhole covers have various shapes, high density and high degree of polymerization. Therefore, they have the advantages of wear resistance, corrosion resistance, environmental protection, etc., and are a relatively green product. However, if the production and installation of Hainan nodular cast iron manhole covers are not strictly in accordance with the standards or are ignorant of their precautions, No matter how good the product is, it will not be delivered
Published on: May 28, 2019 Number of hits: 32
