The ASME B16.9 standard is a standard issued by the American Society of Mechanical Engineers (ASME) entitled “Factory-Made Wrought Steel Butt-welding Fittings“. This standard specifies requirements for dimensions, manufacturing methods, materials, and inspections of steel welded and seamless standard shape fittings for connecting and converting the direction and size of pipes in piping systems.
It also introduces the main content and characteristics of the ASME B16.9 standard:
Scope of application:
The ASME B16.9 standard is applicable to steel welded and seamless standard shape pipe fittings, including elbows, reducers, equal diameter pipes, flanges, tees, crosses, etc., for connecting and converting the direction and size of pipes.
The standard specifies the nominal diameter range of these fittings, from 1/2 inch (DN15) to 48 inches (DN1200), and the nominal thickness from SCH 5S to SCH XXS.
Butt welding can be an automated or manual process used to join metal pieces together. Forged butt welding fittings are usually fairly simple; they are designed so that they can be welded directly to another fitting. However, with this in mind, they need to be developed to a certain standard so that they can be properly fitted to other accessories.
Manufacturing method:
This standard specifies the methods of fabrication of steel welded and seamless standard shape fittings.
For welded fittings, manufacturing processes include cold forming, hot forming, welding, etc.;
For seamless pipe fittings, the manufacturing process is usually by means of hot rolling, cold drawing or cold punching.
Material requirements:
The standard specifies the material requirements for pipe fittings, covering carbon steel, stainless steel, alloy steel, etc. The material of the pipe fittings must meet the chemical composition, mechanical performance and physical property requirements specified in the standard.
Inspection and testing:
The ASME B16.9 standard requires various inspections and tests on the produced pipe fittings to ensure that their quality and performance meet the requirements specified in the standard.
These inspections and tests include dimensional inspection, visual inspection, chemical composition analysis, mechanical performance test, etc.
The ASME B16.9 standard provides an important reference for the design and construction of the pipeline system. It ensures that the size, manufacture and material of the pipe fittings meet the engineering requirements to ensure the safety and reliability of the pipeline system. When using and selecting pipe fittings, the ASME B16.9 standard must be followed to ensure the normal operation of the piping system.
Post time: Jul-27-2023
