ISO9624 PN10 LAPPED FLANGE, DN15-DN10000, LOOSE FLANGE, S235JR, DN15-DN1000.
ISO9624 PN16 LAPPED FLANGE, DN15-DN10000, LOOSE FLANGE, S235JR, DN15-DN1000. PN16 Flange,ISO Flanges,ISO Plate Flange,ISO Standard Flange Shandong Zhongnuo Heavy Industry Co.,Ltd. , https://www.zhongnuoflanges.com
Gas Well Cover: The gas well covers are mostly round and have two sizes. The well covers are generally marked with the words “coalâ€, “gasâ€, or “fire†and there are pipes and sections in the well.
Water well cover: Most of the tap water wells are round wells and are usually located on the access road. Well covers are generally marked with the words "water", "tap water", or "waterdrops". The water meter wells are mostly located around residential buildings.
Heating well cover: The heating well is a circular well, and the orientation is not fixed, but it is generally not located on the main road. The well covers are generally marked with the words "heating" and "heating."
There are two kinds of municipal drainage well covers: one is a round well cover, which is divided into a rainwater inspection well and a sewage inspection well. The well covers are generally marked with the words “YS (rainwater)â€, “WS (sewage)†and “bleedingâ€; One is an oblong well located near the road from 5 cm to 10 cm below the sidewalk.
How to recognize various types of covers on the road
At present, there are many well covers on the roads, which mainly deal with well cover faults in the four industries of tap water, gas, heat supply and municipal drainage. These well covers recognize this: