Coverage includes preparation for joints with the following: no backing rings split or noncontinuous backing rings solid or continuous backing rings consumable insert rings gas tungsten arc welding (GTAW) of the root pass.ī16.28: Wrought steel Buttwelding Short Radius elbows and Returns It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances). This Standard covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. These gaskets are dimensionally suitable for use with flanges described in the referenced flange standards. This Standard covers types, sizes, materials, dimensions, dimensional tolerances, and markings for nonmetallic flat gaskets. This Standard covers spiral-wound metal gaskets and metal-jacketed gaskets for use with raised-face and flat-face flanges.ī16.21: Nonmetallic Flat gaskets for pipe flanges
These gaskets are dimensionally suitable for use with flanges described in reference flange standards ASME B16.5, ASME B16.47, API Specification 6A, and ISO 10423. This Standard covers materials, dimensions, dimensional tolerances, and markings for metal ring-joint gaskets, spiral-wound gaskets, and metal-jacketed gaskets. These fittings are designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings.ī16.20: Metallic gaskets for pipe flanges: Ring-Joint, Spiral-wound, and Jacketed This Standard covers ratings, dimensions, dimensional tolerances, marking and material requirements for socket-welding and threaded forged fittings. Its purpose is to assure installation interchangeability for Valves of a given material, type size, rating class, and end connection.ī16.11: Forged fittings, Socket-Welding and Threaded This Standard covers face-to-face and end-to-end dimensions of straightway Valves, and center-to-face and center-to-end dimensions of angle Valves.
For example, if you have purchased a Weld Neck flange in Houston, if it is standardized item, no matter where you purchase a Blind flange from, it will fit on the flange purchased in Houston.Ī Standard can be defined as a set of technical definitions and guidelines that function as instructions for designers, manufacturers, operators, or users of equipment.Ī standard becomes a Code when it has been adopted by one or more governmental bodies and is enforceable by law, or when it has been incorporated into a business contract.ī16.10: Face to Face and End to End Dimensions of Valves Their use makes communication between the manufacturers and users faster and more effective.įurther, the customers will get the same product no matter where they purchase from if they are standard products. The ASME standards are effective because they have been universally accepted. They will become compulsory only if they have been included in the contract. However, the manufacturers, inspectors and installers cannot be forced to use the ASME codes and standards, as they are only the guidelines. Some of these standards are written in few paragraphs, while others may run into multiple pages.ĪSME codes set the guidelines for the mechanical engineers to follow to common system of manufacturing not only in US but also in the countries that have adopted ASME standards. The ASME standards are the sort of technical guides for the designers, manufacturers and users regarding the usage of the product. ASME has developed several codes and standards to enhance public safety and productivity of Engineers.ĪSME codes and standards were developed to enhance the public safety and productivity of the engineers. The aim of ASME is to promote art, science and allied science and the practice of mechanical and multi-disciplinary engineering. Founded in 1880 as the American Society of Mechanical Engineers, today ASME International is a non-profit educational and technical organization with more than 120,000 members worldwide.