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What is the different of 3.1B seamless Steel Pipe certificates with 3.2 seamless alloy pipes
Seamless Steel Pipe Specific testing
Specific Test Report (manufacturer) – manufacturer’s test certificate, test results based on specific testing.
This is only issued if the manufacturer has no independent testingstation.
If the testing station is independent, in lieu of this certificate a Certificate 3.1.B has to be issued.
3.1.A Inspection Certificate 3.1.A (office inspector)
3.1.B Inspection Certificate 3.1.B (works inspector)
3.1.C Inspection Certificate 3.1.C (purchase inspector)
3.2 Inspection Report 3.2 (works and purchase inspector
What is the hot finished seamless tubes production process