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ASTM B775 is a standard specification for general requirements for nickel and nickel alloy welded nominal pipes, and it does not directly cover the requirements for seamless pipes, but rather focuses on the standards for welded pipes. The following is an overview of the general requirements for nickel and nickel alloy welded metric pipes according to ASTM B775: 1. Overview of the standard Standard number: ASTM B775 Scope of application: This standard is applicable to a variety of nickel and nickel alloy welded pipes, including but not limited to UNS N08020, N08024, N08026, N06600, N06603, N08904, N08925, N08926, N08367, N06625, N06219, N08825 and other alloys. Second, the main requirements chemical composition The chemical composition of the welded pipe is subject to the standard requirements of the respective alloy, which are usually detailed under the UNS number. Mechanical properties Welded pipes need to meet certain mechanical property requirements, such as tensile strength, yield strength, elongation, etc. These performance requirements are often verified by methods such as tensile testing. Dimensions & Tolerances The outer diameter, wall thickness and other dimensions of the welded pipe shall meet the tolerance range specified in the standard. Specific requirements for dimensions may be based on standards such as ANSI B36.19 and detailed size tables are given in the relevant specifications. Welding quality Welded pipes need to meet the requirements of weld quality, including the integrity of the weld, the shape and size of the weld, etc. Welds need to undergo appropriate non-destructive testing, such as ultrasonic testing, radiographic testing, etc., to ensure their internal quality. Surface The inner and outer surfaces of the welded pipe should be smooth, free of cracks, inclusions and other defects. The requirements for surface quality help ensure the corrosion resistance and longevity of the tube. Other requirements Other special requirements may also be included in the standard, such as heat treatment, packaging, transportation and storage of tubes. These requirements are designed to ensure the quality and safety of the tubes during production and use. Testing & Validation All welded pipes are tested and validated in accordance with the methods specified in the standard to ensure that they meet the above requirements. Test methods typically include chemical analysis, mechanical property testing, dimensional measurement, non-destructive testing, etc. Third, the field of application The ASTM B775 standard covers nickel and nickel alloy welded nominal pipes, which are widely used in many fields due to their excellent corrosion resistance, high temperature resistance, high strength, and good processing properties. These areas include, but are not limited to: Oil and gas industry Chemical and petrochemical industry Marine Engineering energy and power industry, etc IV. Conclusions It is important to note that there may be an updated or alternative version of the ASTM B775 standard released over time. Therefore, when selecting and using nickel and nickel alloy welded pipes, attention should be paid to the latest standard versions to ensure that the quality and performance of the product meet the latest requirements. In summary, ASTM B775 provides comprehensive general requirements for the production and use of nickel and nickel alloy welded nominal tubes, designed to ensure that the quality and performance of the tubing meets the needs of a variety of applications.Huanickel?related?products?strictly?implement?this?standard.?For?more?information?about?the?standard?and?the?corresponding?product?information,[email protected] |