**Appearance Inspection:** Appearance inspection is the most basic inspection method. Visually inspect the surface of the FIBC for defects, damage, stains, etc. Check the weaving quality of the woven bag for missing warp or weft threads, skipped stitches, etc. Also check that the straps, zippers, and other accessories are securely installed and not loose or damaged.
**Dimensional Inspection:** Use measuring tools to measure the dimensions of the FIBC to ensure it meets design requirements. Dimensional deviations should be within the specified range; otherwise, it may affect the use of the FIBC and its compatibility with other equipment.
**Physical Performance Testing:**
**Tensile Strength Testing:** Use a tensile testing machine to perform a tensile test on the flat yarns or bag body of the FIBC to determine its tensile strength. During the test, gradually increase the tensile force until the sample breaks, record the maximum tensile force value, and compare it with the standard requirements.
**Tear Resistance Testing:** Use a tear tester to test the tear resistance of the FIBC. Fix the sample on the tester, apply a certain tear force, and measure the tear resistance of the sample.
**Tear Resistance Testing:** Use a tear tester to test the tear resistance of the FIBC. Fix the sample on the tester, apply a certain tear force, and measure the tear resistance of the sample. Drop Test: A flexible FIBC (Flexible Intermediate Bulk Container) filled with a specified weight of goods is dropped freely from a certain height to check for damage. The drop height and number of drops depend on different standards and usage requirements.
Chemical Performance Testing: For some special-purpose flexible FIBCs, chemical performance testing is also required. For example, testing for the presence of hazardous substances such as heavy metals and organic solvents. Chemical analysis methods, such as spectral analysis and chromatographic analysis, can be used to test the raw materials and finished products of the FIBCs.