ISO 21157-2018 船舶和海上技术--低温应用用球阀--设计和试验要求 Ships and marine technology — Ball valves for use in low temperature applications — Design and testing requirements

This document specifies requirements for design, manufacture and test methods of cryogenic ball valves in order to have an excellent quality leakage stability in a very low temperature service (−196 °C to 80 °C).st edition 2018-11 Ships and marine technology — Ball valves for use in low temperature applications — Design and testing requirements Navires et technologie maritime — Robinets à boisseau sphérique destinés aux applications à basse température — Exigences de conception et d'essai Reference number ISO 21157:2018(E) ？ ISO 2018 ISO 21157:2018(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO