1.1本标准实施规程涵盖所有不锈钢或不锈钢衬里、铸造或装配式无阀盖刀闸阀，其法兰端尺寸为NPS 2（DN 50）至NPS 36（DN 900）。1.2本标准实施规程中确定的阀门适用于未遇到冲击载荷的应用。在第3节规定以外的条件下应用需要特殊的设计考虑。

1.1 This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50) through NPS 36 (DN 900).1.2 The valves identified in this Standard Practice are intended for use in applications where shock loadings are not encountered. Applications at conditions other than those specified in Section 3 require special design considerations.