The selection standards and regulations of non-metallic expansion joints will vary according to different countries and regions, but they usually follow some international or industry general standards, such as ASTM (American Society for Materials and Testing), ASME (American Society of Mechanical Engineers) standards, or EN (European standards), etc. However, the latest specific regulations may be updated over time and technological advances, so reference should be made to the latest version of the standard document in practical application.
Here are some common considerations and standard elements when selecting a non-metallic expansion joint:
Working Conditions: Including working pressure, design temperature, compensation requirement, etc. These parameters determine the material selection and structural design of the expansion joint.
Properties of media: The properties of the medium, such as corrosiveness, flow rate, dust content, can affect the material selection and design of non-metallic expansion joints.
Connection method: The connection mode of non-metallic expansion joint, such as flange connection, welding or hoop connection, needs to be determined according to the actual situation and requirements of the pipeline system.
Size and shape: The size (diameter, length, etc.) and shape (circular, rectangular, etc.) of the expansion joint should match the specifications of the pipeline system.
Standards and Specifications: Follow relevant international or industry standards such as ASTM F1123 for structural, material, performance and dimensional requirements for non-metallic expansion joints.
Quality and Acceptance Criteria: Including appearance inspection, weld inspection, material testing, pressure testing, etc. to ensure that the quality and performance of expansion joints meet the requirements.
Installation and maintenance requirements: Consider the installation location and orientation of the expansion joint, and the convenience of later maintenance.
Safety Considerations: Ensure that the design and installation of the expansion joint meet the safety standards, including the requirements of explosion, fire and leak prevention.
For example, ASTM F1123 is a standard specification for non-metallic expansion joints, which specifies the structural, material, performance and dimensional requirements for non-metallic expansion joints. In addition, there are other standards that may apply, such as EN 14917 (European Standard for Non-metallic Expansion Joints).
As standards and regulations are regularly updated, it is recommended to consult professional manufacturers or suppliers when selecting non-metallic expansion joints. They can provide the latest standard information and technical support to ensure that the selected expansion energy saving meets the current engineering requirements and regulatory requirements. If the most accurate and up-to-date provisions are required, the official publication of the relevant standard should be consulted or the standard-setting body should be contacted for the latest version of the standard documentation.