The inspection requirements for ASTM A709 Gr.36 hot-rolled steel plates for bridge structure construction are not specified in great detail in the ASTM A709 standard. They are usually implemented with reference to other relevant standards, and different inspection grade requirements can be put forward according to the needs of different projects. The following is some relevant information:

Inspection standards: A709 Gr.36 steel plates can be inspected during production in accordance with various domestic and foreign inspection standards. Common American standards include A435, A577, A588, etc.; domestic standards include JB4730, GB/T2970, etc. In addition, relevant inspection standards from other countries such as Japan (JIS G0801, JIS G0901), Germany (SEL072), Britain (BS5996), and France (NFS04-305) can also be followed.

Inspection grade requirements: Different inspection grades such as Grade 1, Grade 2, and Grade 3 can be proposed according to the different needs of the project for the internal quality of the steel plate. Different inspection grades have different criteria for defect judgment and acceptance. Generally speaking, the higher the grade, the stricter the requirements for the internal quality of the steel plate, and the fewer defects are allowed.

 

 

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