一个膜元件供应商联合体（consortium of membrane element suppliers）开发了一个项目，由 部分由美国填海局负责，以创建一个新的元素直径标准。通过建立反映 经多家膜元件供应商协商一致，反渗透（RO）/纳滤（NF）系统最终用户将能够 通过使用 在他们的项目中进行竞争性招标。联合体的主要组成部分 项目是经济分析的行为，被认为是准确和公正的 一般行业，以确定使用更大直径设计的系统的成本节约 三种广泛应用的元素（海水、微咸水和地表水） 脱盐或再利用）。该项目考虑了元素和容器的可制造性， 系统设计限制、处理和资本成本降低。 该项目的结果被水处理领域的大多数参与者接受 行业是实现项目目标的关键。为了实现这一目标 联合会在关键阶段采纳了广泛行业利益相关者的反馈意见 这个项目的一部分。这是通过向公众提供的全面调查来实现的 公用事业员工、行业工程师和原始设备制造商。还开发了一个网站来收集 额外的行业投入。与主要船舶制造商进行了重要对话 确定与大直径压力相关的工程和制造问题 容器，尤其是用于高压应用的容器。该项目的调查结果包括: 开发三种给水应用的资本和总水成本 使用直径分别为8英寸、16英寸和20英寸的元件，建议正在广泛使用 在一般水处理行业内传播。包括3个参考文献、表格、图表。

A consortium of membrane element suppliers (Consortium) developed a project, funded in part by the U.S. Bureau of Reclamation, to create a new element diameter standard. By establishing a standard element size that reflects consensus by several membrane element suppliers, reverse osmosis (RO)/nanofiltration (NF) system end users will be able to realize the maximum economic benefits of the larger diameter elements through use of competitive element bidding in their projects. A primary component of the Consortium project is the conduct of an economic analysis, regarded as accurate and unbiased by the general industry, to determine cost savings from systems designed using larger diameter elements for three broad applications (seawater, brackish groundwater and surface water desalting or reuse). The project takes into account element and vessel manufacturability, system design limitations, handling and capital cost reductions. Acceptance of the results of this project by a majority of players in the water treatment industry is key to meeting the project goals. In an attempt to accomplish this objective, the Consortium incorporated feedback from a broad range of industry stakeholders at key stages of the project. This was accomplished through a comprehensive survey made available to utility staff, industry engineers, and OEMs. A website was also developed to garner additional industry input. Significant dialogue was held with leading vessel manufacturers to determine engineering and manufacturing issues associated with large diameter pressure vessels, particularly for high pressure applications. The project findings, which included development of capital and total water costs for each of the three feedwater applications using 8-inch, 16-inch and 20-inch diameter elements, and recommendations are being widely disseminated within the general water treatment industry. Includes 3 references, table, figures.