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The Quality Testing Importance of Spiral Steel Pipes
Apr 28, 2022
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The quality inspection of spiral steel pipes includes inspection and acceptance. According to the standards implemented by the products of spiral steel pipes, industry standards, enterprise standards and the technical conditions and requirements specified in the users'contract, the technical supervision and inspection department staff should conduct comprehensive inspection and test the products item by item. The quality inspection of I model spiral pipes is to ensure that the quality of products manufactured by the factory conforms to the standards and the provisions of the users'contract. You should ensure the quality of the spiral steel pipe first. The unqualified spiral steel pipe should not be sent out from the factory. The inspection should be carried out by the technical supervision and inspection departments. On the basis of the production standards of the products, the technical supervision and inspection departments should carry out the correct inspection and acceptance of the products.
1. Acceptance results of spiral steel pipes
According to the quality inspection results of spiral steel pipes, the large diameter spiral steel pipe is usually divided into three categories: qualified products, repair products and waste products. Qualified products refer to spiral steel pipes which external and internal quality meet relevant standards or technical conditions for delivery and acceptance. The repaired product refers to the spiral steel pipes which the appearance quality and internal quality do not completely meet the standards and acceptance criteria. However, it can meet the standards and acceptance criteria after repair. Waste refers to the spiral steel pipes which the appearance quality and internal quality are not qualified and are not allowed to be repaired or fail to meet the standards and acceptance conditions after repair.
2. The inspection processing of spiral steel pipes
When a certain item does not meet the requirements of the product standard, the unqualified products should be picked out. From the same batch of spiral welded pipes, any double number of samples should be taken for the re-inspection of the unqualified item. If the inspection result (including any index required by the test of the project) is not qualified, the batch of spiral welded pipes should not be delivered. The manufacturer may submit the spiral welded pipes for acceptance one by one if the inspection result is not qualified (including the items that are not allowed to be reinspected due to the unqualified microstructure of the initial inspection result), or conduct the re-heat treatment (the number of re-heat treatments should not exceed two times), with a new batch of acceptance. If there is no special regulation in products standards, the chemical composition of spiral steel pipes should be accepted as smelting composition.
1. Acceptance results of spiral steel pipes
According to the quality inspection results of spiral steel pipes, the large diameter spiral steel pipe is usually divided into three categories: qualified products, repair products and waste products. Qualified products refer to spiral steel pipes which external and internal quality meet relevant standards or technical conditions for delivery and acceptance. The repaired product refers to the spiral steel pipes which the appearance quality and internal quality do not completely meet the standards and acceptance criteria. However, it can meet the standards and acceptance criteria after repair. Waste refers to the spiral steel pipes which the appearance quality and internal quality are not qualified and are not allowed to be repaired or fail to meet the standards and acceptance conditions after repair.
2. The inspection processing of spiral steel pipes
When a certain item does not meet the requirements of the product standard, the unqualified products should be picked out. From the same batch of spiral welded pipes, any double number of samples should be taken for the re-inspection of the unqualified item. If the inspection result (including any index required by the test of the project) is not qualified, the batch of spiral welded pipes should not be delivered. The manufacturer may submit the spiral welded pipes for acceptance one by one if the inspection result is not qualified (including the items that are not allowed to be reinspected due to the unqualified microstructure of the initial inspection result), or conduct the re-heat treatment (the number of re-heat treatments should not exceed two times), with a new batch of acceptance. If there is no special regulation in products standards, the chemical composition of spiral steel pipes should be accepted as smelting composition.
