ISO 21593:2019 PDF

Scope: This document specifies the design, minimum safety, functional and marking requirements, as well as the interface types and dimensions and testing procedures for dry-disconnect/connect couplings for LNG hose bunkering systems intended for use on LNG bunkering ships, tank trucks and shore-based facilities and other bunkering infrastructures. It is not applicable to hydraulically operated quick connect/disconnect couplers (QCDC) used for hard loading arms, which is covered in ISO 16904. Based on the technology used in industrial manufacturing at the time of development of this document, it is applicable to sizes of couplings ranging from DN 25 to DN 200.

ISO 21593:2019 Referenced Document

ASME B16.5-2009 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard*， 2024-04-20 Update
EN 1092-1 Flanges and their joints - Circular flanges for pipes@ valves@ fittings and accessories@ PN designated - Part 1: Steel flanges
EN 12266-1:2012 Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements
ISO 5208:2015 Industrial valves - Pressure testing of metallic valves

2019 ISO 21593:2019 Ships and marine technology — Technical requirements for dry-disconnect/connect couplings for bunkering liquefied natural gas