Regarding the hardness testing of pipeline weld joints
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After heat treatment of alloy steel pipe weld joints, hardness testing is required. What is the specific number of hardness tests for each weld joint? Is it necessary to hit one point on the base material, one point on the heat-affected zone, and one point on the weld seam, but how many times do each point need to be hit during the specific testing? This post was last edited by laiqi on 2009-3-6 14:50 ]
The problem is this: There is one point each in the weld, heat affected zone and base metal, but this point needs to be marked three times to find the average value as the hardness value of this point. Thanks!
See SH3501 Petrochemical Industry Highly Toxic and Combustible Fluids Construction Acceptance Specifications and GB50235 Industrial Metal Pipe Construction Acceptance Specifications
Play each position three times and take the average.
Specification for construction and acceptance of industrial metal pipeline projects GB50235-97
study* Okay~~ All the sea friends gave wonderful answers.