The design of fiber reinforced plastic equipment and pipes needs to be implemented in the manufacturing process, in which the lay-up materials and specifications, the number of layers, the sequence, the resin or fiber content, the mixing ratio of the resin compound, the molding and curing process, the size of the winding angle, etc. are accurate and accurate. No, it determines whether the mechanical properties and corrosion resistance of the final product meet the required quality, so the quality control of fiber reinforced plastic equipment and pipeline manufacturing process is a key part of ensuring product quality. So what principles should be followed in the quality control of the manufacturing process?
1. The manufacturing process of equipment and pipelines shall meet the following requirements:
①Layer materials and specifications, number of layers, sequence, molding and curing process, resin or fiber content, etc. should meet the design requirements;
② When using winding molding, the winding angle should meet the design requirements;
③Resin, initiator and accelerator should be measured accurately and mixed evenly before use.
2. The quality inspection of equipment and pipeline production process shall meet the following requirements:
①The size, thickness and appearance quality of the inner lining should be checked after the production is completed;
②After the structural layer is made, the thickness, layer structure and appearance quality should be checked.
3. After the equipment and pipes are made, items such as appearance, size, resin curing degree, resin content, mechanical properties and penetration resistance should be inspected, and should meet the following requirements:
① The inner surface and outer surface should be smooth and smooth, and the color should be uniform;
②The size, mechanical properties and anti-penetration properties shall meet the design requirements;
③The resin content and allowable deviation should comply with the design regulations. When there is no design regulation, the resin content allowable deviation should be ±3% of the design value;
④ After curing at room temperature, the Barcol hardness should not be lower than 80% of the Barcol hardness of the resin casting body used; after heating and curing, the Barcol hardness should not be lower than 85% of the Barcol hardness of the resin casting body used;
①The size, thickness and appearance quality of the inner lining should be checked after the production is completed;
②After the structural layer is made, the thickness, layer structure and appearance quality should be checked.
3. After the equipment and pipes are made, items such as appearance, size, resin curing degree, resin content, mechanical properties and penetration resistance should be inspected, and should meet the following requirements:
① The inner surface and outer surface should be smooth and smooth, and the color should be uniform;
②The size, mechanical properties and anti-penetration properties shall meet the design requirements;
③The resin content and allowable deviation should comply with the design regulations. When there is no design regulation, the resin content allowable deviation should be ±3% of the design value;
④ After curing at room temperature, the Barcol hardness should not be lower than 80% of the Barcol hardness of the resin casting body used; after heating and curing, the Barcol hardness should not be lower than 85% of the Barcol hardness of the resin casting body used;
4. When the allowable defects exceed the regulations, the equipment and pipelines should be repaired, and the repairs should meet the following regulations:
①The surface of the laminate in the defective area should be ground. After grinding, the surface should be smooth and rough, and should be cleaned up;
②The layup surface of the defective area should be painted with the same resin glue as the repaired layer, and should be lined with chopped strand mat to the design thickness;
③ The outermost layer of the repair of the inner lining should be lined with surface felt, and the same resin cover as the inner lining should be used;
④ After the repair of the structural layer is completed, the lining interval and surface treatment with the inner lining layer or the outer surface layer shall comply with the design requirements;
⑤ After the repair of the outer layer is completed, when there are burrs on the surface, it should be polished, and the resin without air polymerization should be painted.
Post time: Apr-29-2022
