Manhole Refurbishment / H2S Resistant Liners
Manhole chambers, wet wells, and process tanks, concrete is widely used in the dirty water, process and sub-terrain environment. Process gasses can be found within sub terrain environments which in turn minimise the service life of many concrete structures.
Hydrogen sulfide is a colourless, flammable, extremely hazardous gas with a “rotten egg” smell. It occurs naturally in crude petroleum and natural gas, and can be produced by the breakdown of organic matter and human/ animal wastes (e.g., sewage). It is heavier than air and can collect in low-lying and enclosed, poorly ventilated areas such as basements, manholes, sewer lines.
Hydrogen Sulphide within these environments condensates to form mild hydrosulfuric acid. The acid can rapidly deteriorate concrete and even the embedded structural steel reinforcement.
It is essential that sub-terrain structures, especially those at high risk of exposure too H2S are regularly inspected and maintained
Utilising our highly trained confined space operatives, Churchill Specialist Contracting carry out the repair and lining of manholes and sub terrain structures. The materials are commonly glass silica based and provide an extremely high level of resistance too H2S attack and abrasion.
From initial survey to the provision of a cost effective specification through to installation, Churchill offer a turn- key solution for cost effective maintenance of essential infrastructure.
Churchill’s operatives are fully trained in full Breathing Apparatus entry and rescue, this in turn allows Churchill to safely complete repair and relining works in the most hostile of environments.