Guildhall London

Official Scientific Report of NMR PIPETECTOR Installation Anti-Corrosion Equipment, Guildhall London


  • Guildhall London Appearance of the building
  • Guildhall London Installation Place

Installation Purpose and Result

Guildhall London is the headquarter of City of London Corporation and is a world heritage site which has many buildings including The Great Hall shown in this test report. The Great Hall was built in the fourteenth century, listed as a Grade-1 site where many high-profile functions being held. Within the complex situated at the West Wing which was built in 1974, one unit of NMR Pipetector PT-100DS was installed on the domestic hot water pipework which was experiencing water discoloration problem due to internal corrosion.

Only 3 weeks after the installation of NMR Pipetector, Fe content decreased from 6.36 mg/l to 0.015 mg/l which means that corrosion (FeO (OH)) inside the pipework was terminated and reduced into magnetite (Fe3O4) which does not dissolve into water. From then on, NMR Pipetector will protect the pipework from any internal corrosion and water discoloration in excess of forty years.

Installation Summary

Name and Location of Building Guildhall London, West Wing: Gresham Street, London, England
Building Summary Town hall building
Installation Day July 30, 2013
Installation Place and Amount Domestic hot water header pipe (SGP) PT-100DS × 1 unit

Change of Fe Content in Water

Change of Fe Content in Water

Fe Content in Water (㎎/ℓ)

Before Installation After 3 Weeks After 7 Weeks British Government Standard for Drinking Water
6.36 0.015 0.007 0.2