General Technical Conditions for Corrugated Metal Expansion Joints is the national standard of China, which specifies the basic requirements for the design, manufacture, inspection and testing of corrugated metal expansion joints (also known as corrugated compensators). This standard applies to corrugated metal expansion joints used in a variety of industrial piping systems, including but not limited to petroleum, chemical, electric power, metallurgy, construction and others.

The GB/T 16749 standard mainly includes the following contents:

1. Terms and definitions: The terms related to corrugated metal expansion joint are defined and explained.

2. classification: Corrugated metal expansion joints are classified according to their structural characteristics and use environment.

3. Design: The factors that should be considered when designing corrugated metal expansion joints are specified, including material selection, calculation method, compensation ability, fatigue life, etc.

4. MaterialsSpecific requirements for materials of corrugated metal expansion joints are put forward, including chemical composition, mechanical properties and welding properties of materials.

5. ManufacturingThe requirements of manufacturing process, processing accuracy and surface treatment of corrugated metal expansion joints are specified in detail.

6. Inspection and testing: Specifies the inspection items and test methods that must be carried out before the corrugated metal expansion joint leaves the factory to ensure the product quality.

7. Marking, packaging, transportation and storageSpecific requirements are put forward for the marking, packaging method, transportation conditions and storage environment of corrugated metal expansion joints to ensure the product is in good condition during delivery.

The implementation of GB/T 16749 standard provides a unified technical specification for the production and use of corrugated metal expansion joints, which helps to improve product quality and ensure the safe operation of pipeline systems. When designing, purchasing or using corrugated metal expansion joints, the provisions of this standard should be referred to and observed.