ASTM B366 / ASME SB366 is a specification standard for wrought nickel and nickel alloy pipe fittings. These fittings are intended for use in high-temperature and high-pressure service applications, such as chemical processing, petroleum refining, and power generation.
The ASTM B366 / ASME SB366 specification covers a wide range of fittings, including buttweld, socket weld, and threaded fittings. These fittings are made from various nickel and nickel alloys, including Alloy 200, Alloy 201, Alloy 400, Alloy 600, Alloy 625, Alloy C-276, and Alloy 825.
The specification outlines the requirements for the chemical composition, mechanical properties, and testing of these fittings. The fittings must be produced using a suitable manufacturing process, such as forging or hot or cold working. The finished fittings must meet the specified dimensions and tolerances, and they must be free from defects and surface imperfections.
ASTM B366 / ASME SB366 fittings are commonly used in a range of industries, including chemical processing, oil and gas, and power generation. They are known for their high strength, corrosion resistance, and excellent performance in high-temperature and high-pressure environments.
ASTM B366 / ASME SB366 provides dimension tables for a variety of wrought nickel and nickel alloy pipe fittings, including buttweld, socket weld, and threaded fittings. These tables specify the dimensions and tolerances for each type of fitting, as well as the materials they are made from.
For example, the buttweld fittings dimension table specifies the outside diameter (OD), wall thickness (WT), and center-to-end (C-to-E) dimensions for each size and schedule of the fitting. It also specifies the materials that can be used for each type of fitting, such as Alloy 200, Alloy 201, Alloy 400, and others.
Similarly, the socket weld and threaded fittings dimension tables specify the dimensions and tolerances for each type of fitting, including the size, thickness, and materials used. These tables are essential for ensuring that the fittings meet the required specifications and can be installed correctly.
It’s important to note that these dimension tables are just one part of the ASTM B366 / ASME SB366 specification, which also covers the chemical composition, mechanical properties, and testing requirements for these fittings.