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A method to calculate and express energy consumption of industrial wastewater treatment for the purpose of water reuse. Biological processes. Original standard BS ISO 21939-1-2019 in PDF full version. Additional info + preview on request

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Method to calculate and express energy consumption of industrial wastewater treatment for the purpose of water reuse. Accounting for energy recovery. Original standard BS ISO 21939-2-2023 in PDF full version. Additional info + preview on request

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Mechanical vibration. Rotor balancing - Introduction. Original standard BS ISO 21940-1-2019 in PDF full version. Additional info + preview on request

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Mechanical vibration. Rotor balancing - Procedures and tolerances for rotors with rigid behaviour. Original standard BS ISO 21940-11-2016 + A1-2022 in PDF full version. Additional info + preview on request

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Mechanical vibration. Rotor balancing - Procedures and tolerances for rotors with flexible behaviour. Original standard BS ISO 21940-12-2016 in PDF full version. Additional info + preview on request

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Mechanical vibration. Rotor balancing. Criteria and safeguards for the insitu balancing of medium and large rotors. Original standard BS ISO 21940-13-2012 in PDF full version. Additional info + preview on request

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