What does AP of stainless steel pipe mean?
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What does AP in stainless steel pipes mean? Are there any relevant standards?
statement: AP: Pickling pipe (Anneal treatment & Passivation) / (Acid pickling MP: Mechanical grinding treatment or mechanical polishing (Mechanical Polish) BA: Bright Anneal treatment/(Bright Annealing) EP: Electrolytic polishing treatment (Electro Polish V+V: Vacuum double dissolution of ultra-clear stainless steel or double vacuum melting Vim (Vacuum Induction Melting) + Var (Vacuum Arc Remelting), pipe material processing process,: EP: Bright annealing--->Non-destructive testing--->Chemical polishing-->Electro-polishing; BA: Bright annealing--->Non-destructive testing--->One-time cleaning; CP/AP: Heat treatment--->Non-destructive testing--->Chemical polishing; The commonly used standards are ASTM standards and JIS standards. ASTM standards are generally applicable to British stainless steel pipes, such as 3" and 4", while JIS standards are generally applicable to Japanese stainless steel pipes, such as 15A and 40A.