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What is ISO 10816-7 and how to download it for free
ISO 10816-7 is an international standard that gives instructions for the evaluation of vibration on rotodynamic pumps for industrial applications with nominal power above 1 kW[^1^]. It defines the special requirements for evaluation of vibration when the vibration measurements are made on non-rotating parts (bearing housing vibration)[^1^].
The standard specifies zones and limits for the vibration of horizontal and vertical pumps irrespective of their support flexibility[^3^]. The general evaluation criteria are valid for operational monitoring of rotodynamic pumps and for acceptance tests in situ or at the manufacturer's test facility if specified[^3^].
The standard also provides guidance on how to set alarm and trip values for vibration monitoring systems[^1^] [^2^], as well as evaluation criteria for relative shaft vibration of rotodynamic pumps with sleeve bearings[^2^]. It also considers the effects of support flexibility and installation orientation on vibration levels[^2^] [^4^].
ISO 10816-7 was published in 2009 and was last reviewed and confirmed in 2020[^1^]. It is part of the ISO 10816 series of standards that cover different types of machines and applications[^1^].
If you want to download ISO 10816-7 for free, you may find some unofficial sources online that offer PDF files of the standard. However, these sources may not be reliable, legal or up-to-date. The best way to get a copy of the standard is to buy it from the official ISO website or from an authorized distributor. This way, you can ensure that you get the latest and most accurate version of the standard, as well as support the development and maintenance of international standards.
ISO 10816-7 is based on the measurement and evaluation of vibration severity in the frequency domain. It uses the root mean square (RMS) value of the vibration velocity as the main parameter for assessing the vibration condition of the pump. The standard also allows the use of other parameters such as acceleration, displacement or envelope signal.
The standard defines four evaluation zones for vibration severity: A, B, C and D. Zone A represents a very good level of vibration, zone B represents an acceptable level of vibration, zone C represents an unsatisfactory level of vibration that may cause damage in the long term, and zone D represents a very unsatisfactory level of vibration that may cause damage in the short term . The standard provides numerical values for each zone depending on the pump type, size, speed and mounting condition.
The standard also provides examples of typical causes and effects of excessive vibration on rotodynamic pumps. Some of the common causes are imbalance, misalignment, looseness, resonance, cavitation, flow-induced vibration, bearing defects and mechanical faults . Some of the common effects are noise, wear, fatigue, leakage, overheating, reduced performance and reduced reliability . The standard recommends regular vibration monitoring and analysis to detect and diagnose any abnormal vibration condition and to take corrective actions as soon as possible . 061ffe29dd