CSA LNG 2:2017 pdf download.Liquefied natural gas vehicle fuel containers
1.1 General
CSA LNG 2 contains performance requirements for the material, design, marking, and testing of serially produced, refillable containers intended only for the storage of liquefied natural gas for medium- and heavy-duty vehicle operation.
1.2 Construction or materials
AlI specifications as to construction or materials may be satisfied by any construction or materials that will provide at least the equivalent level of performance set forth herein. The current technology for LNG tanks consists of a double walled vessel built of austenitic stainless steel, where the inner vessel holds the LNG and the outer vessel provides insulation and protection from the environment. Additional tests may be required to evaluate potential failure modes that pertain to the new construction or materials that are not specifically addressed in this Standard.
1.3 Units of measure
This Standards contains yard/pound quantities corresponding to the SI (metric) units, the purpose being to allow the Standard to be used in yard/ pound quantities. IEEE/ASTM SI 10, American National Standard for Metric Practice, or ISO 80000-1:2009 Quantities and units一Part 1: General, is used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units, are both specified as a quoted marking requirement, the first stated unit, or both are to be provided.
3 Definitions
The following definitions shall apply in this Standard:
Accredited registrar - a qualified organization accredited by a national or international body (e.g., the Registrar Accreditation Board in the U.S. [RAB]) as operating a certification system (e.g., in accordance with BS 7512, General Criteria for Certification Bodies Operating Quality Systems Certification-Criteria for Technical and Management Competence) that provides third-party assessment, certification, and registration of suppliers' quality systems to applicable standards (i.e., the ANSI/ISO/ASQ Q9000 Series,Quality Management Standards). The registrar's scope of accreditation is described by the accrediting body for particular industry sectors (e.g., Standard Industrial Classification [SIC]). The registrar is thereby authorized to issue accredited certificates of registration to suppliers in the recognized industry.
Change of insulation material/method一any change to the insulation material method that increases the heat flow into the cryogenic fluid (LNG).CSA LNG 2 pdf download.