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What are the methods to check the quality of 304L stainless steel?

Add Time:2021-05-31 Hits:61

What are the methods to check the quality of 304L stainless steel?

1、 304L stainless steel for transporting highly toxic fluid.

2、 304L stainless steel for transporting combustible and toxic fluids with planning pressure greater than or equal to 10MPa or planning pressure greater than or equal to and planning temperature greater than or equal to 400 ℃.

3、 304L stainless steel for transporting non combustible fluid and non-toxic fluid with planning pressure greater than or equal to 10MPa and planning temperature greater than or equal to 400 ℃.

4、 304L stainless steel with temperature less than - 29 ℃ is planned.

5、 Other tracks for which 100% radiographic inspection is requested in planning documents.

6、 When there are no clear rules in the planning, the following rules should be abided by in the spot check share and qualification specification of plate weld radiography:

① The welding seam of stainless steel circular plate transporting non combustible fluid and non-toxic fluid with planning pressure less than or equal to and planning temperature less than 400 ℃ may not be checked by radiography.

② Except for 304L stainless steel in the above rules, the sampling inspection share of other 304L stainless steel shall not be less than 5%, and its quality grade shall not be lower than grade II.


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