ISO 21157:2018 PDF

Scope: 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).

ISO 21157:2018 Referenced Document

ASME B16.10 Face-to-Face and End-to End Dimensions of Valves*， 2022-06-20 Update
ASME B16.11 Forged Fittings, Socket-Welding and Threaded*， 2024-04-22 Update
ASME B16.25 Buttwelding Ends
ISO 28921-1 Industrial valves — Isolating valves for low-temperature applications — Part 1: Design, manufacturing and production testing*， 2022-05-12 Update
ISO 5208 Industrial valves - Pressure testing of metallic valves
ISO 5209 General purpose industrial valves — Marking*， 2019-08-05 Update
ISO 5211 Industrial valves — Part-turn actuator attachments*， 2023-09-01 Update

2018 ISO 21157:2018 Ships and marine technology — Ball valves for use in low temperature applications — Design and testing requirements