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Seamless plain end tubes made from unalloyed steel and without quality requirements

Centre drills for centre holes with radius form — Type R

Overview ISO 2541:2016 defines the dimensions and designation of centre drills for centre holes with a radius form - Type R. The standard covers only metric dimensions, designates drills by type and…

Microbeam analysis. Analytical electron microscopy. Selected area electron diffraction analysis using a trans…

Centre drills for centre holes with protecting chamfer. Type B.

Ships and marine technology. Technical requirements and guidelines for seafloor mapping with uncrewed marine…

Belt drives. Pulleys. Quality, finish and balance.

Centre drills for centre holes with radius form. Type R.

Oil and gas industries including lower carbon energy. Flare details for general refinery and petrochemical se…

Petroleum, petrochemical and natural gas industries — Flare details for general refinery and petrochemical se…

Belt drives — Pulleys — Quality, finish and balance

Overview ISO 254:2011 specifies common quality characteristics for transmission pulleys and establishes defined levels for surface finish and balance. It applies to pulleys used with V‑belts, V‑ribbe…

Oil and gas industries including lower carbon energy — Flare details for general refinery and petrochemical s…

Overview ISO 25457:2023 is an international standard developed by the International Organization for Standardization (ISO) for flare systems in the oil and gas industry, including applications for lo…

Centre drills for centre holes with protecting chamfer — Type B

Overview ISO 2540:2016 specifies standardized centre drills for centre holes with protecting chamfer - Type B. The second edition defines the metric dimensions, designation method and tolerances for…

Centrifugal, mixed flow and axial pumps — Code for acceptance tests — Class C

Sterilization of health care products — Low temperature steam and formaldehyde — Requirements for development…

Overview - ISO 25424:2018 (LTSF sterilization for medical devices) ISO 25424:2018 specifies requirements for the development, validation and routine control of low temperature steam and formaldehyde…

Copper and copper alloys — Determination of manganese — Spectrophotometric method

Textile machinery and accessories — Warping machinery — Preparation of warp for weaving — Vocabulary

Textile floor coverings — Hand-knotted carpets — Determination of tuft leg length above the woven ground

Overview ISO 2549:1972 is an international standard established by the International Organization for Standardization (ISO) that defines a precise method for determining the tuft leg length of hand-k…

Internal combustion engines — Spark plug ignition — Terminology

Microbeam analysis — Analytical electron microscopy — Selected area electron diffraction analysis using a tra…

Overview ISO 25498:2025 - "Microbeam analysis - Analytical electron microscopy - Selected area electron diffraction analysis using a transmission electron microscope" specifies a standardized method…

Fertilizers — Determination of ammoniacal nitrogen

Overview ISO 25475:2016 specifies a laboratory method for the determination of ammoniacal nitrogen in fertilizers. The procedure applies to nitrogenous and compound fertilizers where nitrogen is pres…

Welded plain end tubes made from unalloyed steel and without quality requirements

Sterilization of medical devices — Low temperature steam and formaldehyde — Requirements for development, val…

Microbeam analysis — Analytical electron microscopy — Selected area electron diffraction analysis using a tra…

Overview ISO 25498:2018 - "Microbeam analysis - Analytical electron microscopy - Selected area electron diffraction analysis using a transmission electron microscope" specifies a standardized method…

Quality, finish and balance of transmission pulleys

Ships and marine technology — Technical requirements and guidelines for seafloor mapping with uncrewed marine…

Overview ISO 25451:2026 - Ships and Marine Technology: Technical Requirements and Guidelines for Seafloor Mapping with Uncrewed Marine Vehicles provides standardized procedures and technical guidelin…

Draft BS ISO 25459 In vitro diagnostic medical devices. Requirements for determining commutability of certifi…

BS ISO 25426 Natural gas - Upstream area - Determination of porosity of shale by helium pycnometry

BS ISO 25496 Traditional Chinese medicine. Fritillaria cirrhosa, Fritillaria unibracteata, Fritillaria przewa…

BS ISO 25495 Traditional Chinese medicine — Magnolia officinalis and Magnolia officinalis var — biloba bark

Petroleum, petrochemical and natural gas industries. Flare details for general refinery and petrochemical ser…

1 Scope This International Standard specifies requirements and provides guidance for the selection, design, specification, operation and maintenance of flares and related combustion and mechanical co…

Sterilization of medical devices. Low temperature steam and formaldehyde. Requirements for development, valid…

1 Scope 1.1 Inclusions 1.1.1 This European Standard specifies requirements for the development, validation and routine control of a Low Temperature Steam and Formaldehyde (LTSF) sterilization process…

Microbeam analysis. Analytical electron microscopy. Selected area electron diffraction analysis using a trans…

1 Scope This document specifies the method of selected area electron diffraction (SAED) analysis using a transmission electron microscope (TEM) to analyse thin crystalline specimens. This document ap…