Electrical relays – Tests and measurements - Part 20: Mechanical endurance
IEC 63522-20:2025 This part of IEC 63522 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of DUTs to perform under expected conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for mechanical endurance.
Electrical relays - Tests and measurements - Part 22: Limiting continuous current
IEC 63522-22:2025 This part of IEC 63522 is used for testing along with the appropriate severities and conditions for measurements and tests designed to assess the ability of DUTs to perform under expected conditions of transportation, storage and all aspects of operational use.
This document defines a standard test method for evaluation of the limiting continuous current under specified…
Design and operation of allocation systems used in gas productions facilities
This document specifies how to design and operate allocation systems for gas production facilities.
It describes the most common types, principles and methods used for the allocation of gas and associated liquids. The objective is to provide an approach to current best practice in the oil and gas industry.
It applies to gas and liquid allocations to be performed in production, processing,…
Cryogenic vessels — Pressure-relief accessories for cryogenic service — Part 2: Non-reclosable press...
This document specifies the requirements for the design, manufacture and testing of non‑reclosable pressure-relief devices for cryogenic service, i.e. for operation with cryogenic fluids in addition to operation at temperatures from ambient to cryogenic.
This document is restricted to bursting‑disc and buckling‑pin devices not exceeding a nominal diameter size (DN) of 200 that are designed to…
Lung ventilators and related equipment — Vocabulary and semantics — Part 2: High frequency and jet v...
This document defines terms for:
—    high-frequency oscillatory ventilation (HFOV);
—    percussive ventilation, including high-frequency percussive ventilation (HFPV);
—    jet ventilation, including high frequency jet ventilation (HFJV);
—    modes that combine high-frequency and physiological-rate ventilation.
It is applicable:
—    in lung ventilator and breathing-therapy device…