API STD 612-2020 石油、石化和天然气工业ーー汽轮机ーー专用设备.pdf

Petroleum, Petrochemical, and Natural Gas Industries-Steam Turbines一 Special-purp。se Applicati。ns API STANDARD 612 EIGHTH EDITION NOV EMBER 2020 American Petroleum Institute A同 Accessed by accoum: North Carolina A & T State I Date : Sun Nov 15 01:33:23 2020 I [P address : 50 Forew。rd Nothing contained in any API publication is to be construed as granting any 「ight, by implication or otherwise, for the manufacture, sale, or use of any method , apparatus , or product covered by letters patent. Neither shOL』Id anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent. The verba l forms used to express the provisions in this document are as follows . 一 the term “shall” denotes a minimum requirement to conform to the standard; - the term 飞hould” denotes a recommendation o「 that which is advised but not required to conform to the standard; 一 the term “ may” is used to express permission or a provision that is optional ; - the term “can” is used to express possibility or capability. This document was produced underA PIstandardization proceduresthat ensure appropriate notification and participation in the developmental process and is designated as an A PI standard. Questions concerning the interpretation of the content of this publication or comments and questions concerning the procedures under which this publication was developed should be directed in writing to the Director of Standards ,American Petroleum Institute, 200 Massachusetts Avenue, Suite 1100, Washington, DC 20001. Requests for permission to reproduce or trans late all or any part of the material published herein should also be addressed to the director. Generally, API standards a「e reviewed and revised, reaffirmed, or withd「awn at least every f ive years. A onetime extension of up