【国外标准】 Standard Specification for Seamless and Welded Zirconium and Zirconium Alloy Pipe

This specification covers seamless and welded zirconium and zirconium alloy pipe. The pipe is furnished in three grades as follows; grade R60702- unalloyed zirconium, grade R60704- zirconium-tin alloy, and grade R60705- zirconium-niobium alloy. Seamless pipe shall be made from any seamless method that will yield a product meeting the requirements prescribed. Pipe containing welded seams or other joints made by welding shall comply with the given provisions. The pipe shall be furnished in the annealed or stress-relieved condition. The material shall conform to the requirements as to chemical composition prescribed. The material, as represented by the test specimens, shall conform to the tensile properties prescribed.1.1 This specification2 covers three grades of seamless and welded zirconium pipe.1.2 Unless a single unit is used, for example corrosion mass gain in mg/dm2, the values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. SI values cannot be mixed with inch-pound values.1.3 The following precautionary caveat pertains only to the test methods portions of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.