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IEC 60079-47:2021(E), which is a technical specification, specifies requirements for the construction, marking and documenting of apparatus, systems and installations for use with the 2-Wire Intrinsically Safe Ethernet concept (2-WISE), such as the physical layer specification for 2-Wire Ethernet 10BASE-T1L as defined in IEEE 802.3cg. 2-WISE is a concept for an advanced physical layer (APL),…

IEC 61869-13:2021 is a product standard and covers only additional requirements for stand-alone merging units (SAMUs) used for AC applications having rated frequencies from 15 Hz to 100 Hz. The digital output format specification is not covered by this document; it is standardized in IEC 61869-9 as an application of IEC 61850, which specifies the power utility communication architecture. This…

This document provides the data and indications necessary for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing deviations and their effects on the fit between connecting coaxial spline elements are defined in the formulae and given in the tables. Unless otherwise specified, linear dimensions are…

This document provides data, guidance and requirements for the inspection of straight (non-helical) side fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing deviations and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees.

This document specifies geometry and inspection dimensions for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines. Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees. The…

This document describes the procedures for training personnel who will be involved in the operation of unmanned aircraft systems (UAS). This document defines: a) knowledge, skill, attitude and qualification criteria that are needed for UAS pilots and training organizations that provides training to trainees of UAS remote pilots and other personnel involved in UAS operations; b) training…

1 Scope 1.1 This Standard applies to newly-produced torches for use with propane, butane, natural gas, and MPS (methyl acetylene-propadiene stabilized). This Standard applies to torches that aspirate atmospheric air for combustion. 1.2 This Standard applies to hand-held torches intended for industrial applications such as brazing, soldering, pre-heating for welding, heat treatment, and…

1 Scope 1.1 This Standard applies to manual lever operated, gas shut-off valves sizes NPS 1/4 to 8 of metallic construction with weld and flanged and threaded ends other than pressure lubricated designs for use with natural gas, manufactured gas, and liquefied petroleum gases. Notes: 1) Valves covered by this Standard may be used on “digester gas” (methane produced during sewage treatment…

1 Scope 1.1 General The test method in this Standard determines the wind resistance of vegetated roof assembly when subjected to dynamic wind flow and dynamic wind uplift in laboratory conditions. 1.2 Applicability Testing in accordance with the test method in this Standard is applicable to modular and built-in-place vegetated roof systems. 1.3 Exceptions Testing in accordance with the test…

1 Scope 1.1 Mitigation strategies and other actions This Standard covers the following strategies to maintain permafrost or mitigate permafrost degradation related to existing buildings or structures: a) site techniques that consist of i) site grading and drainage; ii) snow management; and iii) shading or albedo change. b) foundation techniques that consist of i) ventilation; ii)…