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Manhole closings are protected by a grating or manhole cover, a flat plug designed to prevent accidental or unauthorized access to the manhole. These covers are traditionally made of metal,^[2] but may be constructed from precast concrete, glass reinforced plastic or other composite materials (especially where cover theft is of concern). Because of legislation restricting acceptable manual handling weights, Europe has seen a move toward lighter-weight composite manhole cover materials, which also have the benefits of greater slip resistance and electrical insulating properties.

In various industries, particularly in oil and gas, water treatment, and manufacturing, the presence of pinhole leaks in pipelines and tanks can cause significant operational and environmental issues. Pinhole leaks, which are tiny breaches in a material, often go unnoticed until they lead to larger problems. Consequently, finding effective methods to manage these leaks is critical for maintaining safety, efficiency, and compliance with regulations. One of the most practical solutions is the use of pinhole leak clamps.

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