Manhole Division And Setting Suggestions

1. Classification by communication pipe block capacity

According to the number of pipe section pipe blocks or single-hole pipe pipe blocks with an inner diameter of 90mm that can be accommodated by the manhole with a specification of 360mm wide and 250mm high (standard six-hole cement pipe blocks with an inner diameter of 90mm, referred to as standard blocks), it is divided into three categories: large, medium and small.

The size of the manhole set for the communication pipeline should be set according to the long-term capacity of Stainless THE Steel Concentric & Eccentric Reducer. The capacity of the communication pipeline constructed in this period should not be considered alone.

2. Classification by the direction of the manhole

The manhole can be divided into straight manhole, three-way manhole, four-way manhole and oblique manhole according to the direction of the manhole. Among them, the oblique manhole is divided into five types: 15°, 30°, 45°, 60° and 75°. The angle of each oblique manhole can be applied within the range of ±7.5°.

3. Classification by the load bearing capacity of the manhole cover

The manhole cover can be divided into steam-20 level and steam-10 level according to the load bearing capacity of the manhole cover.