本规范涵盖了不锈钢和镍合金（以及碳）的焊接要求 用于制造和建造卫生（卫生）应用中的新储罐、容器和其他设备的板材、板材、棒材和其他形式的钢和其他金属。本规范包括将管道焊接到储罐、容器或其他卫生设备上，用作喷嘴或其他开口。本规范不包括用于运输卫生（卫生）系统产品和清洁或消毒溶液的管道焊接。AWS D18涵盖卫生（卫生）系统的管道焊接。卫生（卫生）应用中奥氏体不锈钢管和管道系统的焊接规范。本规范适用于新结构，也适用于卫生设备的维护和维修。 本规范不涉及部件和系统的结构、压力设计或腐蚀方面。但是，本规范中的要求应与其他管理要求结合使用。卫生处理系统旨在包括处理人类和动物消费产品的系统，或用于这些系统中使用的清洁和消毒溶液的系统。此类产品包括但不限于乳制品、肉类、家禽、蔬菜、饮料、个人护理用品（如洗发水、肥皂、牙膏、化妆品）以及人类和动物消费或使用的其他产品。本规范可全部或部分用于其他需要卫生制造的应用。本规范阐述了焊态表面和成品表面的焊接评定和目视检查要求。

This specification covers the requirements for welding of stainless steels and nickel alloys (as well as carbon steels and other metals for some applications) in sheet, plate, bar, and other forms for the fabrication and construction of new tanks, vessels, and other equipment in sanitary (hygienic) applications. The welding of pipe or tube to a tank, vessel or other piece of sanitary equipment, for use as a nozzle or other opening, is included in this specification. This specification excludes the welding of tube and pipe for the transportation of sanitary (hygienic) system products and cleaning or sanitizing solutions. Pipe and tube welding for sanitary (hygienic) systems is covered in AWS D18.1, Specification for Welding of Austenitic Stainless Steel Tube and Pipe Systems in Sanitary (Hygienic) Applications.This specification is intended for new construction and may also be applied to maintenance and repair of equipment in sanitary (hygienic) applications. This specification does not address structural, pressure design nor corrosion aspects of components and systems. However requirements in this specification should be applied in conjunction with other governing requirements.Sanitary processing systems are intended to include those systems handling products for human and animal consumption, or for cleaning and sanitizing solutions used in these systems. Such products include, but are not limited to, dairy, meat, poultry, vegetable, beverage, personal care items (such as shampoo, soap, toothpaste, cosmetics), and other products consumed or used by humans and animals. This specification may be used, in whole or in part, for other applications where hygienic fabrication is desired.This specification addresses welding qualification and visual examination requirements for as-welded surfaces as well as finished surfaces.