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China, Chinese ASTM A105/A182 Threaded Pipe Fittings for Low/Medium Pressure Systems1 Industrial Products Supplier Manufacturer Details, price list catalog:
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EZ Steel Industrial Co., Ltd.
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Product Description ASTM A105/A182 Threaded Pipe Fittings for Low/Medium Pressure SystemsMaterial Specification, Not Fitting Design:It is crucial to understand that ASTM A105 and A182 are material specifications, not standards for the design or dimensions of the fittings themselves.They define the chemical composition, heat treatment, and mechanical properties required for forged steel components. The fittings are manufactured to a separate design standard, such as ASME B16.11 (for threaded and socket-weld fittings).Two Primary Material Grades:ASTM A105: This specification covers forged carbon steel components for ambient and higher-temperature service. It is the most common material for forged fittings in general service applications.ASTM A182: This specification covers forged low-alloy and stainless steel components for high-temperature service. Grades include F11 (1.25Cr-0.5Mo), F22 (2.25Cr-1Mo), F304/F316 (stainless steel), etc. They are used for more corrosive or higher-temperature environments than carbon steel.Manufacturing Process: Forging:Components under these specifications are produced by hot forging steel billets or bars. This process compacts the grain structure, resulting in superior strength, impact resistance, and structural integrity compared to cast or fabricated components.Application: Low/Medium Pressure Systems:While forged fittings are very strong, the threaded connection method is typically limited to low and medium-pressure systems.Threaded connections can be potential leak points under very high pressure or in systems with severe thermal cycling. For higher pressures, socket-weld (also in ASME B16.11) or butt-weld fittings are preferred.Common Service Environments:Water, Oil, and Gas Services: Commonly used in utility lines, drain lines, and fuel oil lines.Industrial Plant Piping: For air, water, and steam services where welding is not practical or required.Fire Protection Systems (Sprinklers): Threaded fittings are standard in many fire sprinkler piping networks.Low-Pressure Steam Lines: Suitable for lower-pressure steam applications.Key Advantages:Strength: The forging process provides high strength.Ease of Installation: Threaded fittings require only wrench tightening, making them quick to install without specialized welding equipment or skilled welders.Disassembly: Threaded connections can be disassembled and reassembled for maintenance or modification.Limitations and Considerations:Pressure/Temperature Rating: The rating of a threaded fitting is determined by the combination of the material (A105 vs. A182), the fitting design standard (ASME B16.11 Class), the pipe schedule, and the thread type.Not for Severe Cycling: Threaded joints are susceptible to leakage under conditions of severe vibration or thermal cycling due to differential expansion.Wall Thickness Requirement: The pipe must have a sufficient wall thickness (typically Schedule 80 or heavier) to be threaded without compromising its pressure integrity. Company Profile Detailed Photos Packaging & Shipping Certifications FAQ
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