Blind flanges are an important component in piping systems, often used to seal openings in pipes or vessels for maintenance, inspection, or cleaning. In order to ensure the quality, safety and interchangeability of blind flanges, the International Organization for Standardization (ISO) and other relevant standards organizations have issued a series of international standards covering all aspects of the design, manufacture and use of blind flanges.
Here are some of the main international standards related to blind flanges and their contents:
ASME B16.5 – Pipe flanges – Part 1: Steel flanges for industrial and general service piping: This standard covers various types of flanges, including blind flanges. These include the size, tolerance, connection surface shape and flange material requirements of the blind flange.
ASME B16.48-2018 – Line Blanks: A standard published by the American Society of Mechanical Engineers (ASME) that specifically covers blind flanges, often referred to as “line blanks.” This standard specifies the dimensions, materials, tolerances and testing requirements for blind flanges to ensure their reliability in industrial and general service piping.
EN 1092-1:2018 – Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 1: Steel flanges: This is a European standard that covers the design, dimensions, materials and Marking requirements. It is suitable for pipeline systems in France, Germany, Italy and other European countries.
JIS B 2220:2012 – Steel pipe flanges: The Japanese Industrial Standard (JIS) specifies the dimensions, tolerances and material requirements for blind flanges to meet the needs of Japanese piping systems.
Each international standard includes the following:
Dimensions and tolerances: The standard specifies the size range of blind flanges and related tolerance requirements to ensure interchangeability between blind flanges produced by different manufacturers. This helps ensure consistency and interchangeability of piping systems.
Material requirements: Each standard specifies the material standards required to manufacture blind flanges, usually carbon steel, stainless steel, alloy steel, etc. These requirements include the chemical composition of the material, mechanical properties and heat treatment requirements to ensure that the blind flange has sufficient strength and corrosion resistance.
Manufacturing method: Standards usually include the manufacturing method of blind flanges, including material processing, forming, welding and heat treatment. These manufacturing methods ensure the quality and performance of blind flanges.
Testing and inspection: Each standard also includes testing and inspection requirements for blind flanges to ensure that they can work safely and reliably in actual use. These tests typically include pressure testing, weld inspection, and material performance testing.
International standards ensure global consistency and interchangeability of blind flanges. Whether in the oil and gas industry, chemicals, water supply or other industrial sectors, these standards play a vital role in ensuring the safety, reliability and performance of pipeline connections. Therefore, when selecting and using blind flanges, it is crucial to understand and comply with applicable international standards to ensure the stable operation and safety of the pipeline system.
Post time: Sep-26-2023
