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This International Standard specifies the design, minimum safety requirements and inspection and testing procedures for high-pressure natural gas (HPNG) marine transfer arms intended for FSRU/ FRU/ FSU applications. High-pressure transfer arms are considered to be ship-to-shore systems transferring pressurized gas from floating units to any part of a gas grid. Although the requirements for power/control systems are covered, this International Standard does not include all the details for the design and fabrication of standard parts and fittings associated with transfer arms. This International Standard is supplementary to local or national standards and regulations and is additional to the requirements of ISO 28460. This standard was based on general hydraulic system. Other control system, e.g. using only electrical or other power generation may be acceptable if it has been developed, tested and qualified for related standards and if it ensures all the functions safety and functional performance described in Clause 8 for the hydraulic and electrical control system. This International Standard may also be used for existing facilities.
This document gives a method for determining the resistance to cracking of steel pipes in sour service. This test method employs a full-scale test specimen consisting of a short length of pipe (a ‘full ring’), sealed at each end to contain the sour test environment within. The test method applies to any pipe; seamless, longitudinally welded (with or without filler), helical welded, and to girth welds between pipes. NOTE 1 The specimen is usually a pipe but can also consist of flange neck or section of a bend, or other tubular component or a combination of the above. NOTE 2 This test method can also be used for corrosion resistant alloys (CRAs). The method utilizes ovalization by mechanical loading to produce a circumferential stress, equal to the target hoop stress, at two diametrically opposite locations on the inside surface of the test specimen. The test specimen is then subjected to single sided exposure to the sour test environment. NOTE 3 The test also allows measurement of hydrogen permeation rates.