Material and implementation standards.
– Material: Q235B (mainstream)/ Q355B (high-pressure projects).
– National Standard: GB/T 3091-2015
– Export standards: ASTM A53 SCH40, BS1387, EN10255 (mandatory for large-scale municipal and water projects).
– Manufacturing process: seamless welded pipes/seamless tubes + complete hot-dip galvanization.





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